摘要
用 BaCl_2·2H_2O和 H_2TiO_3作反应物,(NH_4)_2CO_3作沉淀剂共沉淀法制备钛酸钡。研究了(NH_4)_2CO_3和BaCl_2·2H_2O及 BaCl_2·2H_2O和 H_2TiO_3的配比(摩尔比)、反应温度和时间、煅烧温度和时间、液固比对产品质量的影响。最佳工艺条件为:(NH_4)_2CO_3/BaCl_2·2H_2O=1.06～1.08。H_2TiO_3/BaCl_2·2H_2O=0.99～1.01,反应温度室温,反应时间1～1.5h,煅烧温度920℃,煅烧时间1.5～2h,液固比30:1。产品经化学、扫描电镜、红外和发射光谱分析,纯度高、粒径小。
The barium titanate was preparared by coprecipitation method. H2TiO3 and BaCl2 ?2H2O were used as starting materials and (NH4)2CO3 as precipitating agent. The effects of operating conditions, such as the ratio of (NH4)2CO3 to BaCl2 ?2H2O,the ratio of BaCl2 ?2H2O to H2TiO3 (mole), reaction temperature and time, calcining temperature and time, and the ratio of liquid to solid etc. on the quality of barium titanate powder were studied. The optimum conditions for the preparation of barium titanate powder were determined as following :(NH4)2CO3/BaCl2 2H2O =1. 06 -1. 08;H2TiO3/BaCl2 2H2O = 0. 99-1. 01jreaction temperature: room temperature;reaction time=1-1. 5 h;calcining temperature = 920 Cicalcining time:l. 5-2 h;the ratio of liquid to solid =30 : 1. The product BaTiO3 was analyzed by chemical analysis, IR, SEM, X - Ray and AES. The results show that the purity of barium titanate is high and the particle diameter is small.
出处
《无机盐工业》
CAS
2000年第2期8-10,共3页
Inorganic Chemicals Industry
关键词
电子陶瓷
钛酸钡
制备
barium titanate, electron ceramic, preparetion
