European Journal of Scientific Research (ISSN: 1450 ... - EuroJournals
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European Journal of Scientific Research (ISSN: 1450 ... - EuroJournals

European Journal of Scientific Research (ISSN: 1450 ... - EuroJournals European Journal of Scientific Research (ISSN: 1450 ... - EuroJournals

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5. REFERENCES © European Journal of Scientific Research, Vol 7, No 5, 2005 [1] Zerizer A. , "Etude des efforts de coupe et de l'état de surface en toupillage", DEA Sciences du bois, LACN, Université de Nancy I, 1988. [2] Duong L., Saison R., "Travail mécanique du bois", Techniques de l'ingénieur. [3] Frantz F.C., "An analysis of wood cutting process", PHD Thesis, University of Michigan press an arbor, 1958. [4] Lambert P., "Réalisation d'un système de mesure d'état de surface pour le matériau bois", DEA Génie électrique, LACN, Université de Nancy I, 1985. [5] Movassaghi E., "Influence des paramètres microdensitométriques du bois sur les efforts de coupe et la qualité des placages de Douglas et Châtaignier obtenus par déroulage", Thèse de Doctorat Ingénieur, USTL Montpellier, 1985. [6] Weil R., "Techniques d'usinage", Editions Dunod. [7] Thomas C.E., "Etude bibliographique des facteurs influençant les efforts de coupe dans l'usinage du matériau bois", DEA Sciences du bois, LACN, Université de Nancy I, 1984. [8] Zerizer A., "Contribution à l'étude de l'usinabilité du MDF (Medium Density Fiberboard)", Thèse de Doctorat de l'université de Nancy I en Sciences du bois, 177p, 1991. [9] Aguilera A., "Optimisation des conditions de coupe pour l'usinage du bois. Application de la méthode du couple outil matière au défonçage des panneaux de fibres de densité moyenne", Ph.D Thesis in wood science, University de Nancy I, France, 2000. [10] AFNOR, "Domaine de fonctionnement des outils coupants. Couple Outil Matière. Partie 6 : mode d'obtention du couple Outil Matière en fraisage. Indice de classement NFE-520-6, 1995.

© European Journal of Scientific Research, Vol 7, No 5, 2005 PIXE MICROANALYSIS OF MUSCOVITE SAMPLES FROM TOURMALINE BEARING GRANITE PEGMATITES OF SOUTHWESTERN NIGERIA O. A. Ige a , S.O.Olabanji b , D. Ceccatob c a Natural History Museum, Obafemi Awolowo University, Ile-Ife, Nigeria b National Institute for Nuclear Physics (INFN), National Laboratories of Legnaro (LNL), Viale dell’Università 2, 35020 Legnaro Padua, Italy. c ICTP – TRIL fellow on sabbatical leave from Centre for Energy Research and Development (CERD), Obafemi Awolowo University, Ile-Ife, Nigeria. ABSTRACT Nearly pure muscovite samples from pegmatite bodies within two different geological environments have been characterised using an accelerator-based analytical technique of PIXE and Electronprobe microanalyser, in order to determine their major, minor and trace elements composition and possible industrial application. 17 elements were measured and result shows that the muscovites from the two localities are generally similar in composition with extensive substitution in the K and Al sites. Trace element differences such as Au are interpreted as reflecting the geological environments. Key words: Muscovites, PIXE, microprobe,trace element. INTRODUCTION The analysis of trace elements in industrial minerals holds the key to understanding ore metal pathways and ore formation processes. Proton-induced X-ray emission (PIXE) analysis and the Electron microprobe provide direct non-destructive methods for the determination of the composition of these trace elements with detection limits down to 20 ppm. Muscovite (Al1.788KMg.64O12Si3.572), often called white mica, is a rock-forming mineral that has a layered structure of sheets of aluminum silicate weakly bonded together by layers of potassium ions. Due to its perfect cleavage, elasticity, and low thermal conductivity, muscovite is often used for electrical and thermal insulation applications and also as a lubricant. Finely ground muscovite is sometimes used to make special surfaces in prints and paintings. It was also used in this fashion as furnace doors, but its use in this capacity is not as common today because of modern technology alternatives. Muscovite is a common mineral found all over the world, however most locations do not produce a high yield product. The largest and most important deposits of muscovite are found in the CIS, Pakistan, India, and Brazil. The United States produces only a small amount of high yield sheet 13

5. REFERENCES<br />

© <strong>European</strong> <strong>Journal</strong> <strong>of</strong> <strong>Scientific</strong> <strong>Research</strong>, Vol 7, No 5, 2005<br />

[1] Zerizer A. , "Etude des efforts de coupe et de l'état de surface en toupillage", DEA Sciences<br />

du bois, LACN, Université de Nancy I, 1988.<br />

[2] Duong L., Saison R., "Travail mécanique du bois", Techniques de l'ingénieur.<br />

[3] Frantz F.C., "An analysis <strong>of</strong> wood cutting process", PHD Thesis, University <strong>of</strong> Michigan<br />

press an arbor, 1958.<br />

[4] Lambert P., "Réalisation d'un système de mesure d'état de surface pour le matériau bois",<br />

DEA Génie électrique, LACN, Université de Nancy I, 1985.<br />

[5] Movassaghi E., "Influence des paramètres microdensitométriques du bois sur les efforts de<br />

coupe et la qualité des placages de Douglas et Châtaignier obtenus par déroulage", Thèse de<br />

Doctorat Ingénieur, USTL Montpellier, 1985.<br />

[6] Weil R., "Techniques d'usinage", Editions Dunod.<br />

[7] Thomas C.E., "Etude bibliographique des facteurs influençant les efforts de coupe dans<br />

l'usinage du matériau bois", DEA Sciences du bois, LACN, Université de Nancy I, 1984.<br />

[8] Zerizer A., "Contribution à l'étude de l'usinabilité du MDF (Medium Density Fiberboard)",<br />

Thèse de Doctorat de l'université de Nancy I en Sciences du bois, 177p, 1991.<br />

[9] Aguilera A., "Optimisation des conditions de coupe pour l'usinage du bois. Application de la<br />

méthode du couple outil matière au défonçage des panneaux de fibres de densité moyenne", Ph.D<br />

Thesis in wood science, University de Nancy I, France, 2000.<br />

[10] AFNOR, "Domaine de fonctionnement des outils coupants. Couple Outil Matière. Partie 6 :<br />

mode d'obtention du couple Outil Matière en fraisage. Indice de classement NFE-520-6, 1995.

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