Crystal chemistry and thermal expansion of Cd{sub 0.5}Zr{sub 2}(PO{sub 4}){sub 3} and Cd{sub 0.25}Sr{sub 0.25}Zr{sub 2}(PO{sub 4}){sub 3} ceramics
- Univ. de Rennes (France)
- Faculte des Sciences, Rabat (Morocco)
Cd{sub 0.5}Zr{sub 2}(PO{sub 4}){sub 3}(CdZP) and the partially substituted phase Cd{sub 0.25}Sr{sub 0.25}Zr{sub 2}(PO{sub 4}){sub 3}, prepared by the sol-gel route, belong to the NZP family. The structure of CdZP (S.G.R{bar 3}) has been established by the Rietveld method. The thermal behavior of CdZP, investigated by X-ray powder diffraction, is anisotropic, i.e., the structure expands along c axis and contracts along a axis. Dilatometric measurements and SEM micrographs of ceramics, sintered with 5% ZnO, show that CdSrZP presents the advantage to decrease microcracking, and then anisotropy, occurring during the heating cycle. The thermal expansion coefficient a{sub bulk} of the ceramic CdSrZP is very small (0.6 {times} 10{sup {minus}6} C{sup {minus}1}).
- OSTI ID:
- 455221
- Journal Information:
- Materials Research Bulletin, Vol. 32, Issue 1; Other Information: PBD: Jan 1997
- Country of Publication:
- United States
- Language:
- English
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