体系酸度对直接沉淀法合成钛酸钡的影响  

Effect of pH on the preparation of BaTiO_3 by direct precipitation method

作　　者：王璟 董赛男 栾雪梅 商少明[1,2] 

机构地区：[1]江南大学化学与材料工程学院,江苏无锡214122 [2]南京理工大学化工学院,江苏南京210094

出　　处：《化学研究与应用》2009年第12期1653-1656,共4页Chemical Research and Application

摘　　要：The effect and the mechanism of pH on the preparation of BaTiO3 by direct precipitation method were discussed.The result shows that BaTiO3 can be formed only when pH is above 13 under certain energy field.OH-in the reaction not only acts as a reagent of neutralization,but also plays two vital role.The first role is promoting Ti and Ba to form active,easily absorptive or coprecipitated BaTiO3.The second role is acting as a catalyst stimulating the formation of BaTiO3.The effect and the mechanism of pH on the preparation of BaTiO3 by direct precipitation method were discussed. The result shows that BaTiO3 can be formed only when pH is above 13 under certain energy field. OHin the reaction not only acts as a reagent of neutralization, but also plays two vital role. The first role is promoting Ti and Ba to form active, easily absorptive or coprecipitated BaTiO3. The second role is acting as a catalyst stimulating the formation of BaTiO3.

关 键 词：钛酸钡 直接沉淀法 酸度 

分 类 号：O611.4[理学—无机化学]