High sinterability of Ca-PZT, synthesized by polymeric and partial oxalate process
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
20/05/2014
20/05/2014
01/02/2001
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Resumo |
This study includes Ca-PZT in the morphotropic phase boundary, MPB process combining the Pechini method, (ZT) and the Partial oxalate method (Ca-PZT) by obtaining single phase particles of ZT phase with a high specific surface area (similar to 110 m(2)/g at 550 degrees C) and narrow particle size distribution. Lead and calcium oxalates were precipitated onto the ZT particle surface and reacted to a solid state interface ZT/Ca-PZT/PbO-CaO. A deviation of a coexistence region from F-T- and F-R-phases to F-R-phase (Zr rich region) was observed. Strong surface area reduction occurs by Ca-PZT crystallization at about 700 degreesC, and demonstrated high sinterability (2.40 m(2)/g - 350 nm) with apparent densities near to 99.9%. Different processing methods did not demonstrate superior results. Studies of calcined powder shows a high sinterability of powder calcined 3 h at 700 degrees C and sintered 3 h at 1000 degreesC coming up to 99.8% of relative density. (C) 2001 Kluwer Academic Publishers. |
Formato |
1001-1006 |
Identificador |
http://dx.doi.org/10.1023/A:1004840326765 Journal of Materials Science. Dordrecht: Kluwer Academic Publ, v. 36, n. 4, p. 1001-1006, 2001. 0022-2461 http://hdl.handle.net/11449/39539 10.1023/A:1004840326765 WOS:000166860400032 |
Idioma(s) |
eng |
Publicador |
Kluwer Academic Publ |
Relação |
Journal of Materials Science |
Direitos |
closedAccess |
Tipo |
info:eu-repo/semantics/article |