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Phase transformations in lead zirconate-titanate doped with lanthanum

Journal Article:

Abstract

Presented are the results of studies on the character of phase transitions of the lead-lanthanum zirconate-titanate (LLZT) system. The replacement of lead by lanthanum leads to the expansion of the region of antisegnetoelectric (ASE) states of solid solutions of lead zirconate-titanate (LZT) in the direction of PbTiO/sub 3/ concentration growth. An intermediate region is revealed between segnetoelectric (SE) and ASE states, material properties in which depend on their prehistory: annealed samples are in the ASE state, whereas the application of electric field exceeding some critical value induces the SE state. A family of phase diagrams obtained at consequent replacement of lead by lanthanum permits to identify phase states in any series of LLZT with a constant ratio of Zr:Ti, in the x/65/35 series in particular. Thermally depolarized state of materials of this series at x<6.5 is shown to be antisegnetoelectric at all the temperatures below the Curie point Tsub(c), and heating causes phase transition of ASE..-->..PE (paraelectric state) at Tsub(c). Polarized samples being heated, a successiveness of phase transitions of SE..-->..ASE takes place at T/sub 0/, and that of ASE reversible PE at Tsub(C) (Tsub(0)  More>>
Publication Date:
Jul 01, 1979
Product Type:
Journal Article
Reference Number:
AIX-11-554661; EDB-80-128714
Resource Relation:
Journal Name: Fiz. Tverd. Tela; (USSR); Journal Volume: 21:7
Subject:
36 MATERIALS SCIENCE; LANTHANUM COMPOUNDS; PHASE TRANSFORMATIONS; LEAD COMPOUNDS; TITANATES; ZIRCONATES; ANTIFERROELECTRIC MATERIALS; CRITICAL TEMPERATURE; CURIE POINT; ELECTRIC FIELDS; FERROELECTRIC MATERIALS; HIGH TEMPERATURE; LOW TEMPERATURE; MEDIUM TEMPERATURE; PERMITTIVITY; QUANTITY RATIO; SOLID SOLUTIONS; TEMPERATURE DEPENDENCE; DIELECTRIC MATERIALS; DISPERSIONS; MATERIALS; MIXTURES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; RARE EARTH COMPOUNDS; SOLUTIONS; THERMODYNAMIC PROPERTIES; TITANIUM COMPOUNDS; TRANSITION ELEMENT COMPOUNDS; TRANSITION TEMPERATURE; ZIRCONIUM COMPOUNDS; 360202* - Ceramics, Cermets, & Refractories- Structure & Phase Studies
OSTI ID:
6971030
Country of Origin:
USSR
Language:
Russian
Other Identifying Numbers:
Journal ID: CODEN: FTVTA
Submitting Site:
INIS
Size:
Pages: 1937-1942
Announcement Date:

Journal Article:

Citation Formats

Ishchuk, V M, and Morozov, E M. Phase transformations in lead zirconate-titanate doped with lanthanum. USSR: N. p., 1979. Web.
Ishchuk, V M, & Morozov, E M. Phase transformations in lead zirconate-titanate doped with lanthanum. USSR.
Ishchuk, V M, and Morozov, E M. 1979. "Phase transformations in lead zirconate-titanate doped with lanthanum." USSR.
@misc{etde_6971030,
title = {Phase transformations in lead zirconate-titanate doped with lanthanum}
author = {Ishchuk, V M, and Morozov, E M}
abstractNote = {Presented are the results of studies on the character of phase transitions of the lead-lanthanum zirconate-titanate (LLZT) system. The replacement of lead by lanthanum leads to the expansion of the region of antisegnetoelectric (ASE) states of solid solutions of lead zirconate-titanate (LZT) in the direction of PbTiO/sub 3/ concentration growth. An intermediate region is revealed between segnetoelectric (SE) and ASE states, material properties in which depend on their prehistory: annealed samples are in the ASE state, whereas the application of electric field exceeding some critical value induces the SE state. A family of phase diagrams obtained at consequent replacement of lead by lanthanum permits to identify phase states in any series of LLZT with a constant ratio of Zr:Ti, in the x/65/35 series in particular. Thermally depolarized state of materials of this series at x<6.5 is shown to be antisegnetoelectric at all the temperatures below the Curie point Tsub(c), and heating causes phase transition of ASE..-->..PE (paraelectric state) at Tsub(c). Polarized samples being heated, a successiveness of phase transitions of SE..-->..ASE takes place at T/sub 0/, and that of ASE reversible PE at Tsub(C) (Tsub(0)..ASE phase transition in the LZT system.}
journal = {Fiz. Tverd. Tela; (USSR)}
volume = {21:7}
journal type = {AC}
place = {USSR}
year = {1979}
month = {Jul}
}