Dense fine grained ceramics of barium titanate

被引：0

作者：

Proust, C. ^{[1
]}

Miot, C. ^{[1
]}

Husson, E. ^{[1
]}

机构：

[1] Universite d'Orleans, Orleans, France

来源：

Ferroelectrics | 1996年 / 186卷 / 1 -4 pt 4期

关键词：

Carbon - Crystal structure - Density (specific gravity) - Dielectric properties - Ferroelectric materials - Grain size and shape - Heating - Optimization - Permittivity - Powders - Sintering - Temperature;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

A sintering optimization of barium titanate ceramics from fine grained and homogeneous reproducible powders obtained by the citric process is presented. Different sintering parameters are studied: heating rates, final temperature, dwelling times at this final temperature, influence of the powder deagglomeration step. The ceramics obtained by sintering at 1230 or 1300°C are barium carbonate free, the residual carbon content being estimated at about 400 ppm in the surface layer. They exhibit a grain size close to 1 μm, a structure in which the cubic and tetragonal phases coexist, and a density of about 96% of the theoretical density. Their permittivity and loss factor are respectively about 5000 and 2.5 × 10-2 at 25°C. Dielectric properties have been investigated in BaTiO3 ceramics sintered at 1300°C in varying sintering atmospheres (O2 and N2).

引用

页码：89 / 92