SCHOTT Technical Glasses
Apart from its application in optics, glass as a technical material has exerted a formative influence on the development of important technological fields such as chemistry, pharmaceutics, automotive, optics, optoelectronics and information technology. SCHOTT Technical Glasses offers pertinent information in concise form. It contains general information for the determination and evaluation of important glass properties and also informs about specific chemical and physical characteristics and possible applications of the commercial technical glasses produced by SCHOTT. With this brochure, we hope to assist scientists, engineers, and designers in making the appropriate choice and make optimum use of SCHOTT products.
Apart from its application in optics, glass as a technical material has exerted a formative influence on the development of important technological fields such as chemistry, pharmaceutics, automotive, optics, optoelectronics and information technology. SCHOTT Technical Glasses offers pertinent information in concise form. It contains general information for the determination and evaluation of important glass properties and also informs about specific chemical and physical characteristics and possible applications of the commercial technical glasses produced by SCHOTT. With this brochure, we hope to assist scientists, engineers, and designers in making the appropriate choice and make optimum use of SCHOTT products.
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29<br />
Its thermal properties coupled with outstanding water and<br />
acid resistance make DURAN ® a highly suitable material<br />
for use in laboratories and large-scale chemical plants, for<br />
example as pipelines, reaction vessels, heat exchangers,<br />
and so on.<br />
For thin-walled DURAN ® items, application temperatures<br />
can lie considerably above 200 °C. To guarantee shape stability,<br />
a maximum of 500 °C should not be exceeded.<br />
DURAN ® is made into tubes of up to 450 mm in dia meter<br />
and pressed and blown glassware. Processed as flat glass,<br />
it is available as a floated product under the tradename<br />
BOROFLOAT ® 33 and as a rolled sheet glass under the tradename<br />
SUPREMAX ® for applications in home appliances,<br />
lighting, chemical engineering, safety, optics, precision<br />
engineering and photovoltaics. Figures 27 and 28 illustrate<br />
the chemical resistance.<br />
DURAN ® is also available in different shapes and called<br />
CONTURAX ® .<br />
6.2 FIOLAX ®<br />
These highly resistant borosilicate glasses are particularly<br />
suited for pharmaceutical parenteral packaging such as<br />
syringes, ampoules and vials for high-grade injection solu<br />
CONTURAX ® Pro profile glass tubing<br />
tions. Their manufacturing, exclusively in the form of tubes,<br />
is today possible with exceptionally tight diameter and wall<br />
thickness tolerances. Therefore, the production of syringes,<br />
ampoules and vials and their filling on the high-speed filling<br />
lines of the pharmaceutical industry are unproblematic. Because<br />
the wall thickness of the tubes is comparatively small,<br />
6<br />
1<br />
c (HCI) = 6 mol/l<br />
Exposure time: 16 h<br />
1.5<br />
c (NaOH) = 1 mol/l<br />
Exposure time: 1 h<br />
0.1<br />
Na 2<br />
O<br />
1.0<br />
SiO 2<br />
Attacked layer in µm ––><br />
0.01<br />
0.001<br />
0 50 100<br />
150<br />
Temperature in °C ––><br />
Attacked layer in µm ––><br />
0.5<br />
0<br />
0 20 40 60 80 100<br />
Temperature in °C ––><br />
Fig. 27. Acid attack on DURAN ® /BOROFLOAT ® 33/SUPREMAX ® 8330<br />
as a function of temperature and calculated from leached amounts of<br />
Na 2 O and SiO 2<br />
Fig. 28. Alkali attack on DURAN ® /BOROFLOAT ® 33/SUPREMAX ® 8330<br />
as a function of temperature and calculated from the weight losses
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