Hostname: page-component-6bf8c574d5-t27h7 Total loading time: 0 Render date: 2025-02-14T14:59:37.300Z Has data issue: false hasContentIssue false
  • English
  • Français

High Temperature Guinier X-Ray Diffractometry for Thermal Expansion Measurements in the Hexagonal form of Cordierite ((2MgO·2Al2O3·5SiO2)*

Published online by Cambridge University Press:  06 March 2019

J. S. Pressnall ,
J. J. Fitzpatrick  and
Paul Predecki
J. S. Pressnall
Affiliation:
University of Denver, Denver, CO 80208
J. J. Fitzpatrick
Affiliation:
University of Denver, Denver, CO 80208
Paul Predecki
Affiliation:
University of Denver, Denver, CO 80208
Get access

Abstract

A computer-controlled high temperature Guinier diffractometer system for accurate determination of lattice thermal expansion is described. A critical test of the system using α-Al2O3 (0.3μ polishing alumina) showed close agreement with the single crystal expansion data of Wachtman et al. Lattice thermal expansion of cordierite doped with the following dopants: Ge+4, P+5, Zn+2, Li+1 and Ca+2 was investigated. Of these the Li+1 at the 5% level (5% of Si+4 replaced by Li+1 + Al+3) produced the largest decrease in mean lattice expansion.

Type
V. Other XRD Applications
Information
Advances in X-Ray Analysis , Volume 27: Thirty-Second Annual Conference on Applications of X-ray Analysis, August 1-5, 1983 , 1983 , pp. 397 - 404
Copyright
Copyright © International Centre for Diffraction Data 1983

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

Footnotes

**

Present address: Systems Planning Corp., Arlington, VA

*

Work supported by DOE on contract DE-AC02-81ER10896.

References

1. Meagher, E. P. and Gibbs, G. V., The Polymorphism of Cordierite I; The Crystal Structure of Low Cordierite, Canad. Mineralogist 15:43 (1977).Google Scholar
2. Gibbs, G. V., The Polymorphism of Cordierite I:The Crystal Structure of Low Cordierite, Aroer, Mineralogist 51:1068 (1966).Google Scholar
3. Milberg, M. E. and Blair, H. D., Thermal Expansion of Cordierite, Am. Ceram. Soc. 60:372 (1977).Google Scholar
4. Wachtman, J. B., Jr., Scuderi, T. G., and Cleek, G. W., Linear Thermal Expansion of Al2O3 and ThO2 from 100 to 1100°K. J. Am. Ceram. Soc. 45:319 (1962).Google Scholar
5. Pressnall, J. S., Thesis, M.S., Univ. of Denver (Dept. of Physics), (1983) .Google Scholar