Pyrochlore/perovskite phase transformation in lead zinc-niobate based ceramics

Author

Wang, Xiaoli ; Yao, Xi

Author_Institution

Xian Jiaotong Univ., China

fYear

1992

fDate

30 Aug-2 Sep 1992

Firstpage

377

Lastpage

380

Abstract

A phase transformation from pyrochlore to perovskite takes place during the firing of Pb(Zn_1/3Nb_2/3)O₃ (PZN)-based ceramics. Stabilization of the perovskite phase in PZN-based ceramics is closely related to the type of additive and its amount. A thermodynamic model based on the chemical potential of the system that accounts for the stabilization of the perovskite phase in terms of the internal stress introduced by the additives is proposed. The additives that stabilize the perovskite phase in PZN-based ceramics are those materials that can initiate the formation of perovskite subgrains

Keywords

ceramics; ferroelectric materials; internal stresses; lead compounds; powder technology; sintering; solid-state phase transformations; thermodynamic properties; PZN-based ceramics; PbZnO₃NbO₃; chemical potential; ferroelectric material; internal stress; pyrochlore-perovskite phase transformation; thermodynamic model; Additives; Capacitive sensors; Ceramics; Chemicals; Firing; Laboratories; Phase change materials; Temperature; Thermal stresses; Thermodynamics;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectrics, 1992. ISAF '92., Proceedings of the Eighth IEEE International Symposium on

Conference_Location

Greenville, SC

Print_ISBN

0-7803-0465-9

Type

conf

DOI

10.1109/ISAF.1992.300715

Filename

300715