【摘要】 以采用固相法合成的BaTiO3粉体为前驱物,研究了3种不同配料方式的水热条件进行水热处理后粉体的化学组成、颗粒形貌以及粒度分布的变化。结果表明,经过BaTiO3+H2O+NaOH+BaCl2水热处理,原始粉体中的大颗粒发生裂解,小颗粒发生溶解,外加的Ba2+与颗粒表面的Ti(OH)62-发生水热反应而生成新的BaTiO3晶粒,使粉体的粒度变小,粒度分布范围变窄,颗粒形貌变得规则,粉体化学组成更符合化学计量,实现了高温高压下水热反应的“整形”作用。更多还原

【Abstract】 The different of chemical composition, particle morphology and particle size distribution were researched after three different hydrothermal treatment means with BaTiO₃ powder by solid phase synthesis. The result shows that the bigger particles are broken, the smaller particles are dissolved, Ti（OH）₆^2- on particle surface react with additive Ba²⁺ into uniformly BaTiO₃ grain by the hydrothermal method of BaTiO₃+H₂O+NaOH +BaCl₂.The effects result in decrement of particle, narrowness of particle size distribution, regular morphology and stoichiometric composition.BaTiO₃ particle are rebuilt by hydrothermal reaction of hightemperature and pressure.更多还原