Ferroelectric ceramics manufactured from nano-sized powders of bi-containing layer-structured phases. Issue 4 (15th June 2016)

• Record Type: Journal Article
• Authors: Nesterov, A. A.; Topolov, V. Yu.; Panich, E. A.
• Is Part Of: Ferroelectrics. Volume 43:Issue 4/5/6(2016)
• Page Start: 1
• Page End: 7
• Publication Date: 2016-06-15
• Subjects: Ferroelectric ceramics -- piezoelectric properties -- unit-cell parameters -- phase composition -- bismuth-containing phase; Ferroelectricity -- Periodicals; Ferroelectric crystals -- Periodicals; 537
• DOI: 10.1080/07315171.2016.1171047
• Languages: English
• ISSNs: 0731-5171

Abstract

ABSTRACT: Methods to improve dielectric and piezoelectric properties of ferroelectric ceramics with high Curie temperatures (TC > 700 K) are discussed. In the first method improving the electrophysical properties is achieved due to a change in technology of the synthesis of powders of ferroelectric phases, and a proposed technological mode enables one to keep a composition of these powders due to a decrease of temperature of the synthesis of the chemically active powders and to a decrease of temperature of sintering. In this method high-temperature ferroelectric ceramics based on the Aurivillius phases are characterised by the piezoelectric coefficient d33 ≤ 40 pС / N and dielectric permittivity ϵ T 33 /ϵ0 ≤ 230. The second method is concerned with ferroelectric phases of PbTiO3 – PbZrO3 – Bi4 Ti3 О12 – МеТiO3 (Ме = Са, Sr, Ва), and on this basis ceramics are formed with larger piezoelectric parameters and TC > 700 K. Temperature of the synthesis of powders based on ferroelectric phases, obtained using the low-temperature method, is lower by 430 K on the average, at reducing the process time range by more than 3 times.