SCHOTT NEXTREMA® brochure
NEXTREMA® is a unique family of glass-ceramics. This material combines the glossy appearance of glass with exceptional thermal, chemical, optical and mechanical properties like an attractive bending strength of 100 – 160 MPa for materials with a thickness of around 4 mm. With a thermal resistance of 950 °C or for specific applications even higher, combined with a thermal shock resistance of 700 – 820 °C, it ensures a reliable material performance even under extreme temperature conditions. The six unique glass-ceramic types combined with the wide range of sizes and thicknesses varying from 2 mm to 6 mm (> 6 mm on request) will open up new possibilities in product design and performance. The unique transmission spectra provide new ideas for combining innovative infrared heating functionalities with attractive lighting effects. SCHOTT NEXTREMA® can be used in different application fields such as barbecue grills, IR heaters, high temperature furnaces (setters and inner lining) and radiant grills. The versatility of this material will surely impress you.
NEXTREMA® is a unique family of glass-ceramics. This material combines the glossy appearance of glass with exceptional thermal, chemical, optical and mechanical properties like an attractive bending strength of 100 – 160 MPa for materials with a thickness of around 4 mm. With a thermal resistance of 950 °C or for specific applications even higher, combined with a thermal shock resistance of 700 – 820 °C, it ensures a reliable material performance even under extreme temperature conditions. The six unique glass-ceramic types combined with the wide range of sizes and thicknesses varying from 2 mm to 6 mm (> 6 mm on request) will open up new possibilities in product design and performance. The unique transmission spectra provide new ideas for combining innovative infrared heating functionalities with attractive lighting effects. SCHOTT NEXTREMA® can be used in different application fields such as barbecue grills, IR heaters, high temperature furnaces (setters and inner lining) and radiant grills.
The versatility of this material will surely impress you.
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NEXTREMA ®Glass-ceramics engineeredand designed for extremeconditions
2Contents4Glossy functionality18Surface resistance and gas impermeability6Brilliant use of form20Process inert8An all-round talent, seven features22Robustness at high temperatures10Operating temperature up to 950 °C24Ideas for the future with NEXTREMA ®12Minimal thermal expansion28The 4 NEXTREMA ® types of material14Thermal shock resistance32Standard forms of delivery16Wide transmittance spectrum35Technical features
<strong>SCHOTT</strong> is a leading international technology group in the areas ofspecialty glass and glass-ceramics. With more than 130 years ofoutstanding development, materials and technology expertise we offera broad portfolio of high-quality products and intelligent solutionsthat contribute to our customers’ success.This is also what the <strong>SCHOTT</strong> NEXTREMA ® brand stands for. Withhigh-performance glass-ceramic, <strong>SCHOTT</strong> offers a portfolio ofmaterials that opens completely new fields of application for engineersand designers with its exceptional technical properties. As a realmulti-talent, NEXTREMA ® demonstrates what makes glass-ceramic aground-breaking and unique solution, particularly in high temperatureenvironments.3
4NEXTREMA ®Glossy functionalityIn the construction of technical applications, yourmain concerns are physical and chemical parameters,robustness under extreme temperature loads and highchemical resistance.The material decides if an idea will be implemented or not. WithNEXTREMA ® , we offer you a high-tech material with a variety of features.Particularly in high-temperature environments, where other materials suchas plastic, conventional glass or metal show their limitations, NEXTREMA ®is your new alternative.Are you ready for innovative developments? Then start thinking ofsolutions never seen before.In the following pages, next to this icon, engineerscan discover potential ideas for the future.
7NEXTREMA ®Brilliant use of formColours and shapes are your world. You know thatdesign is crucial for innovation and differentiation.With NEXTREMA ® glass-ceramic, we are offering you a high-techmaterial in the most varied colours, shapes and appearances. For aninnovative product and industrial design under exceptional conditions,whether transparent, tinted, translucent or opaque – NEXTREMA ® ,the new material, will give your design a ground-breaking face.Open the limits of what is possible and imagine how visual andtechnical design can function in a high-temperature environment.In the following pages, next to this icon you will findsuggestions for your future design ideas.
8An all-round talent, seven featuresThe basis of NEXTREMA ® is formed by seven features.Each feature individually or particularly combined can leadto new technical developments and fields of application.You will find the unique product features in the top half ofthis <strong>brochure</strong>. An impulse to produce ideas for the futureis given in the lower half of the <strong>brochure</strong>. Perhaps you willsoon be using NEXTREMA ® in your research, developmentor production?1 2Operatingtemperatureup to 950 °C(1,742 °F)MinimalthermalexpansionThe engineerWhat benefits doesNEXTREMA ® offer engineers?Would you like to find out what technicalpossibilities NEXTREMA ® offers? Inthe following pages, you will find anoverview of what can be done in thefuture.
93 4 5 6 7ThermalshockresistanceWide transmittancespectrumSurface resistanceand gasimpermeabilityProcess inertRobustnessat hightemperaturesThe designerWhat benefits doesNEXTREMA ® offer designers?Let your imagination run free. In thefollowing pages, you will learn the kindof potential a high-tech material likeNEXTREMA ® can offer your industrialand product design.We would like to rouse your imagination for potential ideasfor the future. The innovations presented are not finishedproducts, but rather visions of applications we do not yetknow of, but may be possible tomorrow with your ideas.
10Feature 1:Operating temperature up to 950 °CWarm, warmer, hot: NEXTREMA ® glass-ceramic shows itsreal strength under conditions of extreme temperatures. Wehave the right type of NEXTREMA ® for the widest rangeof temperatures – guaranteed up to 950 °C (1,742 °F).Idea for the future 1:Improve and observe hot processesHot on developmentYou can realize intelligent concepts using NEXTREMA ®particularly in the production of semiconductors anddisplays. Examples include inner lining and heat shieldsin high temperature industrial ovens. Or why not useNEXTREMA ® as carrier plates and process boxes forcomplex coating processes in the semiconductor or solarindustry.
110 100 200 300 400 500 600 700 800 900 1,000Temperature [°C]With an eye for what‘s importantWhen you see mistakes with the naked eye, you canreact more quickly. NEXTREMA ® stands for a new levelof transparency, such as in the observation of internalhigh temperature processes. The strength and size ofNEXTREMA ® offers you a greater freedom of design.High temperature industrial processes take anew form with NEXTREMA ® .
12Feature 2:Minimal thermal expansionThe innovative potential is expanded with NEXTREMA ® ,not the material itself. The intelligent microstructure ofNEXTREMA ® results in near zero expansion, enabling theglass-ceramic to keep its shape in a high temperatureenvironment.Idea for the future 2:Accuracy in extreme conditionsMaximum load and still stress-freeWhere there are high temperature fluctuations withina short time along with the strictest requirements forprecise maintenance of size, NEXTREMA ® is extremelyresistant to external influences. Because there areno restrictions with material expansion even underextreme temperature conditions, NEXTREMA ® canresolve many of your constructional issues.
13NEXTREMA ® glass-ceramicSiliconAluminiumSteelSintered glassGraphite, carbon0 5 10 1520 25 30Linear expansion coefficient [a in 10 -6 /K]Always in top formDeformations caused by extreme fluctuationsin temperature can be almost completelyeliminated due to the high dimensionalstability of NEXTREMA ® . The material’s imageand visual appearance do not change andbring consistency to your industrial design.The near zero thermal expansion of NEXTREMA ® „fixes” measurementpoints despite extreme temperature fluctuations,increasing the accuracy of optical measurement technology.
14Feature 3:Thermal shock resistanceNothing shocks NEXTREMA ® . Quick change of temperature?Fire and ice? Thanks to the thermal shock resistance of NEXTREMA ® ,thermal material failure is a thing of the past.Idea for the future 3:Quick reaction heating systems for water and airIt delivers what it promisesWhether there are extreme temperature gradients or very fastheating and cooling phases for highly efficient processing times –NEXTREMA ® remains stable. Where metal deforms, glass breaks andplastic can not resist the heat, NEXTREMA ® is a reliable choice.Possible areas of application? Imagine you are installing heating finsin an electrical car, what about heating the car interior with highperformance heating technology, where only the material is heatedwith an intelligent coating on the fins.
15Sudden change of temperatureof the materialMaterial remains free of tensionbetween hot and coldNEXTREMA ® makes heat chicFor example, NEXTREMA ® opens up completely newdesign possibilities for vehicle interiors. Here, whereit is especially important to save space and weight,innovative technology meets great demand in newdesign. Electrical heating coating on NEXTREMA ®means heating can be incorporated in the newdesign.New functionality in trendsetting design:NEXTREMA ® heating fins in electrical cars.
16Feature 4:Wide transmittance spectrumSpecific to the type and thickness of NEXTREMA ® ,there are different transmission windows. These areimportant for certain technical applications and, inaddition, give each material an unique appearance.Idea for the future 4:Optimizing processesSpecific use of transmission windowsNEXTREMA ® makes your visions for radiation in thefuture a reality: as a cover or filter for sources of heatradiation or used in IR drying equipment, disinfectionequipment, IR sauna cabins, as component of UVprotection or for efficient heating of substrates.NEXTREMA ® in IR paintdrying equipment –discover a new dimensionof application.
17Transmission [%]100UVVisibleareaIR8060402000 5001,000 1,500 2,000 2,500 3,000 3,500 4,000 4,500 5,000Wavelength [nm]Ideas in the right lightDifferent transmission windows produce differentcolours and appearances of glass-ceramics. Let yourimagination run free and discover a new range ofpossible applications in the visible and/or IR area.
18Feature 5:Surface resistance and gas impermeabilityThanks to its unique surface finish, NEXTREMA ® hasmultiple resistance to acids and bases. This means itcan be used in aggressive environments.Idea for the future 5:Energy efficiency in an aggressive environmentAttacking is futileAcids, bases and aggressive gases don’t stand a chancewith NEXTREMA ® . Use NEXTREMA ® where absolutesurface resistance is required – such as for shielding orcoating under chemically aggressive conditions.For the production of accumulators, for acidic or alkalinecleaning processes in the semiconductor industry or forheat exchangers in corrosive environments, NEXTREMA ®can become your efficient solution.
19N 2N XO XO 2O 3With NEXTREMA ® , a new generation of devices isSuperior in every environmentAs a component in heat exchangers,NEXTREMA ® can optimize processes inthe energy industry.taking shape. Where longevity and beauty had untilnot been feasible, elegant and high product aestheticsare now possible with NEXTREMA ® – even in aggressiveenvironments.
20Feature 6:Process inertWithout discussion: NEXTREMA ® is process inert.Even under extreme conditions, the material will nothave negative interactions with the process environment.There are no interfering process factors such asgas emissions from organic components.Idea for the future 6:Coating of the highest purityUncompromising in useWith NEXTREMA ® , you have a material that guarantees thehighest purity, because it has double security in the coatingprocess: NEXTREMA ® does not give off nor absorb anycomponents.-+-Whether for plasma-enhanced chemical vapour deposition(PECVD), for plasma etching or the production of cathodesfor lithium-ion batteries, NEXTREMA ® will soon be effectivelyused in many areas and sectors.+
21EPECVD (500 - 700 °C / vacuum)PECVD (932 - 1,292 °F / vacuum)Ground-breaking technical design-+Develop a new design for carrier plates in coatingprocesses or take a new creative path in thecoupling of coating and cleaning processes.++-+-+NEXTREMA ® is a versatile material that can makeyour design a sought after solution in many areasof coating technologies.+Process inert NEXTREMA ® glass-ceramic is perfectas a carrier material for plasma coating and etching.
22Feature 7:Robustness at high temperaturesStrong under heat: NEXTREMA ® exceeds where othermaterials fail. This is why exceptionally high mechanicalstability under high temperatures is important. It makes thecrucial difference even with thin plates in large formats.Idea for the future 7:Discover new worldsResistance is futileThanks to its mechanical robustness at high temperatures,NEXTREMA ® glass-ceramic is your new alternative. Forexample, in the production of heat shields or inner liningsof high temperature industrial processes, show strength ineven the hottest environments with NEXTREMA ® .Glass-ceramic for outer space? Stillscience fiction today – but it couldbecome a reality tomorrow. Launchinto new dimension of constructionwith NEXTREMA ® .
23kgMechanical stability of NEXTREMA ®at high temperatureElegant safetyReplace standard high temperature materials withNEXTREMA ® glass-ceramic and redesign the appearanceof your product. NEXTREMA ® offers a unique impressionwith the highest possible level of functionality and is aproven material in many areas.
24Ideas for the futurewith NEXTREMA ®From the material to the product –NEXTREMA ® opens new dimensions indevelopment for engineers and designers.Let yourself be inspired. The examples onthese pages show the possibilities – or whatcould become possible in the distant future.Bring your ideas for the future to us.Precision at the highest levelPrecise measurement results even with extreme temperaturefluctuations: The measuring table with the NEXTREMA ® surfaceBeautiful & safe heatNEXTREMA ® upgrades design and protection levelof IR heaters in both patio and industrial applications.A better way to grillNEXTREMA ® for BBQ Grills creates a better grillingexperience
25Wind and weatherproofFlood light cover screens with NEXTREMA ®Efficient in a new designNEXTREMA ® heating fins for heat andclear visibility in electrical carsProcess observationInnovative perspectives for food technologyBreath-taking heating technologyElectrical heating systems on NEXTREMA ® as the substrate
26Ideas for the futurewith NEXTREMA ®Process inert at high temperatureNEXTREMA ® as a carrier plate or inner lining for high temperaturefurnaces used in FPD and solar panel manufacturing.Recovering energyNEXTREMA ® as a component in exhaust gas recoveryService for the food sectorHygienic, attractive, efficient: NEXTREMA ®revolutionizes roaster technologies
27Lab technology with know-howNEXTREMA ® makes heat efficient in sterilizing processesEfficient dryingNEXTREMA ® in IR paint drying equipmentDesign-oriented technologyGround-breaking heating technology - for water tooProgress with visionThe glass-ceramic toaster makes design an experience
28The 4 NEXTREMA ® types of materialNo NEXTREMA ® is like another. We would like to supply you withglass-ceramic that corresponds to your requirements as preciselyas possible. This is why NEXTREMA ® is available infour types, each with different benefits.<strong>SCHOTT</strong> NEXTREMA ® transparentThe transparent variety keeps a clear head in extreme temperature environments.Particularly in infrared applications, where the material must also have the besttransparency in addition to high thermal robustness, NEXTREMA ® transparent is amaterial made to measure.<strong>SCHOTT</strong> NEXTREMA ® tintedNEXTREMA ® tinted stands out with three prominent material features:high temperature resistance, high mechanical stability, and optimized transmittanceof wavelengths for infrared.
29All four NEXTREMA ® types at a glance<strong>SCHOTT</strong> NEXTREMA ® translucentThanks to its ideal insulation properties, NEXTREMA ® translucent is generally the numberone material where high insulation properties are required in extreme temperature environments.The fact that this type of NEXTREMA ® also has excellent resistance against chemicalattacks makes it an even more sought after solution.<strong>SCHOTT</strong> NEXTREMA ® opaqueBesides its surface resistance, NEXTREMA ® opaque glass-ceramic impresses due to itsabsolutely dense and pore-free surface. Both show why NEXTREMA ® also plays asignificant role from an aesthetic perspective. The noble opaque white sets an example.
30All materials at a glance<strong>SCHOTT</strong> NEXTREMA ® transparentNEXTREMA ® transparentThe transparent glass-ceramic offers the advantage of beinghigh temperature resistant along with allowing a clear view.In addition, it is highly permeable to thermal radiation,especially in the shortwave infrared range. As a result,transparent glass-ceramics can be ideal for applicationsrequiring very high thermal strength in combination withgood transparency.Key features• Near zero thermal expansion• Excellent transparency• Highly permeable to thermal radiation• Water- and dirt-repellent in comparison to technical ceramics• UV-filterExemplary application fields• Carrier plates in CVD-furnaces• Cover panels for heating elements and burners• Cover panels for projectors/beamers/photocopiers• Thermo-mechanical resilient glass (e. g. night-vision devices)• Windows for combustion furnaces• Interior panels of oven doors<strong>SCHOTT</strong> NEXTREMA ® tintedThe tinted glass-ceramic has excellent temperatureresistance in combination with high mechanical stability.Heat is transmitted very efficiently, with virtually no heatloss because of an almost exact heat permeability and alow thermal conductivity. The transmission of wavelengthis optimized for the infrared range.Key featuresNEXTREMA ® tinted• Near zero thermal expansion• Precise heat permeability• Low thermal conductivity• Mechanical stability• System-optimized IR transmittanceExemplary application fields• Cover plates for (infrared) heating elements (e. g. IR drying plants)• Carrier/protection plates for food-processing industry
31<strong>SCHOTT</strong> NEXTREMA ® translucentDue to its low alkali content, translucent glass-ceramic hasvery unique insulating qualities. It is the ideal material forapplications requiring an excellent insulator at high temperatures.In addition, this material meets highest standards onresisting chemical surface attacks.Key featuresNEXTREMA ® translucent white• Excellent electrical volume resistance at high temperatures• High chemical resistance• High IR transmittanceExemplary application fields• Cover plates for (infrared) heating elements (e. g. IR drying plants)• Lining for furnaces<strong>SCHOTT</strong> NEXTREMA ® opaqueThe opaque glass-ceramic is distinguished by its excellentresistance to chemical surface attacks by acid, alkali or hydrolyticeffects. In addition, opaque glass-ceramic exceeds dueto its absolutely dense and pore-free surface, which is alsodirt-repellent and suited for clean room conditions. Furthermore,this material can be used for applications requiringgood insulating properties. Aesthetics play an important rolefor non-transparent glass-ceramics as well. The white appearancegives the material a noble and brilliant touch.NEXTREMA ® translucent bluegreyKey features• Highest chemical resistance• Dense and pore-free• Thermal insulating properties• Brilliant appearance• High IR transmittance without blinding• IR-A filterNEXTREMA ® opaque whiteExemplary application fields• Ceramic carrier plates for sputter and solar production• Carrier/protection plates/baking stones for food-processingindustry, i.e. microwave applicationsNEXTREMA ® opaque grey
32Standard forms of deliveryThe current status of availability by material and form of delivery has to be requestedby the customer. Not all combinations are producible. Other forms of deliveryare available on request.Flat panelsFormat: Cut to size panels• Length50 mm – 1930 mm• Width50 mm – 1075 mm• Diameter20 mm – 1075 mm• Thickness (standard) 2 mm – 6 mm• On request8 mm – 16 mmMechanical treatment• Grinding profile• Drilled borehole• Bevelled edges (width)Seamed, C-, U-, V-shape, others on requestØ 10 mm – Ø 200 mm5 mm – 20 mmOverview of dimensions: Cut to size panelsStandard length Standard width ProfileThickness Min. - Max. Min. - Max.2 mm 50 – 1555 mm 50 – 860 mm On request3 mm 50 – 1930 mm 50 – 1075 mm C, U, V4 mm 50 – 1930 mm 50 – 1075 mm C, U, V5 mm 50 – 1930 mm 50 – 1075 mm C, U, V6 mm 50 – 1930 mm 50 – 1060 mm C, U, V≥ 8 mm 50 – on request 50 – 960 mm C, U, VForms of delivery
33Grinding profilesC-shapeU-shapeV-shapeBent panelsFormats of bent panels must be requested. Various forms are available.
34Dimensional tolerances and material defectsWith regard to the specific format all of the following characteristics refer to thenet-size, as agreed upon with the customer. Other forms of delivery are availableon request.Dimensional tolerances of flat, cut to size panelsCharacteristics / Areas / LocationToleranceThickness tt = 2.0 mmt = 3.0 / 4.0 / 5.0 mmt = 6.0 mm± 0.3 mm± 0.2 mm± 0.3 mmEdge length ll ≤ 500 mm± 1.0 mm500 mm < l ± 1.5 mmSquareness (ISO 1101) (depending to the edge length l)l ≤ 500 mm≤ 1.0 mm500 mm < l ≤ 1.5 mmFlatness along the diagonal D (depending on edge length l)on requestCorner radius rDrilled holesr ≤ 5 mm± 0.5 mm5 mm < r ≤ 20 mm ± 1.0 mm20 mm < r ± 2.0 mmDiameter of drilled holesBorehole position to reference± 0.5 mm± 1.5 mmDimensional tolerances
35Technical featuresAll technical data presented in this material specification must be understoodas typical average values. Detailed information on the different material types isdocumented in separate data sheets or will be provided on the customer’s specialrequest. Specifications are subject to change without pior notice.Values, for which no generally accepted measuring method exist, such as by atechnical standard, are specified and explained.
36Optical characteristicsGeneral appearanceTransparent, translucent white, opaque white, opaque grey, tinted.One-sided nubs are available on request.The surface texture depends on the thickness.Polishing process provides “window glass” appearance.Decoration is available on request.TransmissionThe transmission values are measured for a polished sample of a specificthickness.NEXTREMA ®opaque whiteNEXTREMA ®tintedNEXTREMA ®translucent bluegreyNEXTREMA ®transparentNEXTREMA ®translucent whiteNEXTREMA ®opaque greyTransmission [%]10090807060504030201000 500 1 000 1 500 2 000 2 500 3 000 3 500 4 000 4 500 5 000This graph is based on data from individual measurements. Deviations may result frommanufacturing process. Typical transmission graph of different ceramization states withsample thickness of approximately 4 mm.Wavelength [nm]
37Mechanical characteristics [at room temperature]r approx. 2.5 – 2.6 g/cm 3DensityE approx. 84 – 95 x 10³ Mpaμ approx. 0.25 – 0.26HK 0.1 / 20approx. 570 – 680s bBapprox. 100 – 160 MpaThe impact resistance of NEXTREMA ® depends on the kind of installation, size,thickness and geometry of the panel, type of impact and especially on drilledholes and their position in the material.Modulus of elasticity(ASTM C-1259)Poisson‘s ratio(ASTM C-1259)Knoop hardness(ISO 9385)Bending strength(DIN EN 1288, Part 5, R45)Impact resistanceTherefore, information regarding impact resistance can only be given withknowledge of the respective and defined application (especially in combinationwith the technical standards regarding impact resistance that have to be met forsome applications). The quality of the grinding profile has an important influenceaccording to the impact resistance.0 %Material 724-3 (t = 4 mm)R a≤ 0.20 μmRms ≤ 0.25 μmPorosity (ISO 9385)Roughness
38Thermal characteristicsCoefficient of linear thermal expansion (DIN ISO 51045-1, DIN ISO 7991)In certain applications, the coefficient of mean linear thermal expansion andtherefore the total change of length of a NEXTREMA ® part within a specified temperaturerange is important to its function. The following mean coefficient valuesand the graph show the temperature dependency.CTE in different temperature rangesa (-50 °C; 100 °C)-0.8 – 0.6 x 10 -6 K -1a (0 °C; 50 °C)-0.8 – 0.6 x 10 -6 K -1a (20°C; 300 °C)-0.4 – 0.9 x 10 -6 K -1a (300°C; 700 °C)0.1 – 1.6 x 10 -6 K -1NEXTREMA ®tintedNEXTREMA ®transparentNEXTREMA ®opaque white0,080,070,060,050,040,030,020,010,00-0,01-0,02Thermal expansion in dependence on the temperature-100 0 100 200 300 400 500 600 700 800 900Relative change of length for different temperaturesTemperature [°C]Specific heat capacityC p (20 – 100 °C)0.80 – 0.85 J / (g x K)Thermal conductivity(DIN 51936, ASTM E 1461-01)l (90 °C)1.5 – 1.7 W / (m x K)
39MTG 400 – 800 KResistance of the material to temperature differences between a defined hot zoneand cold edge of room temperature, without cracking due to thermal stress.Maximum temperaturegradient (MTG)TSR 700 – 820 °C ( 1,292 - 1,508 °F)Resistance of the material to thermal shock when the hot material is splashed withcold water at room temperature, without cracking due to thermal stress.Thermal shock resistance (TSR)The temperature / time load capacity specifies the maximum permissible temperaturesfor load times of the material, below which no cracking should occurdue to thermal stress. The temperature / time load data for uneven and even temperaturedistributions (e.g. homogeneous heating conditions) within the materialare different.Temperature/time loadcapacity (TTLC)Homogeneous heating of the materialTTLC / Short term load (1h) [°C] 880 – 950 / [°F] 1 616 – 1 742TTLC / Continuous load (5000 h) [°C] 700 – 850 / [°F] 1 292 – 1 562Inhomogeneous heating of the materialTTLC / Short term load (1h) [°C] 450 – 750 / [°F] 842 – 1 382TTLC / Continuous load (5000 h) [°C] 400 – 560 / [°F] 752 – 1 040Acoustic characteristicsV Long.[m/s] 6 300 – 6 700The acoustic velocity value is valid for longitudinal propagation of acoustic wavesand is a calculated value, using measurements according to the referred standard.Acoustic velocity(ASTM C-1259)
40Chemical characteristicsPrincipal constituents (reference: DIN EN 1748-2-1)The principal constituents of all the ceramic materials are as follows:Component Symbol Percentage per massSilicon dioxide SiO 250 % – 80 %Aluminium oxide Al 2O 315 % – 27 %Lithium oxide Li 2O 0 % – 5 %Zinc oxide ZnO 0 % – 5 %Titanium oxide TiO 20 % – 5 %Zirconium oxide ZrO 20 % – 5 %Magnesium oxide MgO 0 % – 8 %Calcium oxide CaO 0 % – 8 %Barium oxide BaO 0 % – 8 %Sodium oxide Na 2O 0 % – 2 %Potassium oxide K 2O 0 % – 2 %Other (trace content on request) 0 % – 5 %The materials do not contain any harmful substances according to the Europeandirective 2002/95/EC “Hazardous Substances in electrical and electronicallyEquipment” and fulfill the terms of RoHS without any concerns.End of life usageFederal Republic of Germany waste disposal regulations differentiate five classesof waste, Z0 (non-restricted disposal), Z3 (household waste), and up to Z5 (highlytoxic waste). All NEXTREMA ® materials are classified as non-restricted disposal.Local government regulations may differ. Please contact the local authority ifneeded. NEXTREMA ® must not be disposed of in recycling boxes for standardglass (e.g. glass bottles).Chemical resistanceThe chemical resistance of NEXTREMA ® is more extensive than that of most othercomparable materials.Acid resistance (DIN 12116) S 1 – 3Alkaline resistance (ISO 695) A 1 – 2Hydrolytic class (DIN ISO 719) HGB 1
41Electrical characteristicsSpecific electrical volume resistance (DIN 52326)log p (250 °C)Ω · cm 6.6 – 7.2log p (350 °C)Ω · cm 5.2 – 5.7t K100°C 170 – 205Specific electrical volume resistance at different temperatures (log r [Ω · cm])109876543150 200 250 300 350 400 450Specific electrical volume resistance at different temperaturesTemperature [°C]NEXTREMA ®tintedNEXTREMA ®transparentNEXTREMA ®opaque whitee R (1 MHz, 25 °C)6.3 – 7.8Dielectric constant(DIN 53483)tan d (1 MHz, 25 °C)0.002 – 0.02Dielectric loss tangent(DIN 53483)
42NEXTREMA ® is open for your ideasCan you imagine NEXTREMA ® being used in your company? Then get detailedinformation on the many possibilities on setting design and technology standardswith NEXTREMA ® in extreme conditions. Request the detailed NEXTREMA ® datasheets.Please see contact information on the back side.We will gladly be of assistance.
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Home Tech<strong>SCHOTT</strong> AGHattenbergstrasse 1055122 MainzGermanyPhone +49 (0)6131/66-25431Fax +49 (0)3641/28889162info.nextrema@schott.comwww.schott.com/nextremaVersion 4.0 status June 2015