摘要
本文在分析草酸氧钛钡形成机理的基础上，提出ＴｉＯ￣（２＋）与草酸混合，控制一定的ｐＨ值，首先生成（ＮＨ＿４）＿２［ＴｉＯ（Ｃ＿２Ｏ＿４）＿２］配合物，然后与ＢａＣｌ＿２溶液进行复分解反应制备ＢａＴｉＯ＿３的前驱体——草酸氧钛钡的新工艺。用化学分析法对前驱体Ｂａ／Ｔｉ比进行分析，采用ＸＲＤ、ＳＥＭ，ＢＩ—９０激光散射粒度仪对前驱体的晶型，颗粒大小，形貌以及粒径分布进行分析。结果表明：用该法所合成的前驱体组分确定，粒径小，分布窄，近似球形，煅烧后为高纯的ＢａＴｉＯ＿３。
A new process for BaTiO(C_2O_4)_2·4H_2O preparation is proposed after studying its formation mechanism.TiO￣(2+) is mixed with H_2C_2O_4,and by controlling pH value,(NH_4)_2 [TiO(C_2O_4)_2 ] complex is obtained,which re-acts with BaCl_2 aqueous solution to produce BaTiO(C_2O_4)_2· 4H_2O the precursor of BaTiO_3.Ba/Ti ratio,crys-tal structure, particle radius, morphology and size distribution of the precursor are studied by chemical analysis,XRD,SEM and BI 90 sizer.The results indicate that the precursor from this process has spherical shape,fixed composition,narrow size distribution aid can be calcinated to BaTiO_3 of high purity.
出处
《硅酸盐通报》
CAS
CSCD
北大核心
1995年第3期14-19,共6页
Bulletin of the Chinese Ceramic Society
关键词
钛酸钡
电子陶瓷
草酸氧钛钡
液相合成
barium titanate,electronic ceramic,barium titanyl oxalate tetrahydrate,preparation technology.
