溶胶-凝胶法制备Ca0.4Sr0.6Bi4Ti4O15细晶陶瓷

人工晶体学报, 2010, 39(3): 675-679.

溶胶-凝胶法制备Ca0.4Sr0.6Bi4Ti4O15细晶陶瓷

冯博楷 ^1, , 武利顺 ^2, , 赵亮培 ^3, , 陈立胜 ^4, , 范素华 ^5, , 李红云 ^6,

1.莱芜职业技术学院粉末冶金学院,莱芜,271100

2.菏泽学院化学与化工系,菏泽,274031

3.莱芜职业技术学院粉末冶金学院,莱芜,271100

4.莱芜职业技术学院粉末冶金学院,莱芜,271100

5.山东建筑大学材料科学与工程学院,济南,250101

6.莱芜职业技术学院粉末冶金学院,莱芜,271100

关键词：钛酸锶铋钙 , 细晶陶瓷 , 凝胶预碳化处理 , 铁电性能

Preparation of Ca0.4Sr0.6Bi4Ti4O15 Fine-grained Ceramics by Sol-gel Method

采用凝胶预碳化处理工艺制备了颗粒粒径较小,无硬团聚的Ca0.4Sr0.6Bi4Ti4O15纳米粉体,以Ca0.4Sr0.6Bi4Ti4O15非晶团簇粉体为陶瓷素坯的原料,同组分高浓度的Ca0.4Sr0.6Bi4Ti4O15溶胶为粘结剂,制备了Ca0.4Sr0.6Bi4Ti4O15细晶陶瓷,研究了Ca0.4Sr0.6Bi4Ti4O15粉体的相结构和微观形貌以及陶瓷的显微结构和铁电性能.实验结果表明:700 ℃焙烧粉体呈现为非晶团簇,800 ℃焙烧粉体形成了纯层状钙钛矿结构,粒径在100～150 nm之间,无硬团聚;950 ℃烧结的Ca0.4Sr0.6Bi4Ti4O15细晶陶瓷结构致密,晶粒尺寸在0.2～0.5 μm之间,其铁电性能优良,剩余极化Pr=12.5 μC/cm2,矫顽场强Ec=50 kV/cm.

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