Preparation of needle-like TiZrO4 and PZT powders
Preparation of needle-like TiZrO4 and PZT powders
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DOI：
10.1007/bf00542907
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发表时间：
1992-03
影响因子：
4.5
通讯作者：
T. Kimura;A. Takenaka;T. Mifune;Y. Hayashi;T. Yamaguchi
中科院分区：
文献类型：
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作者：
T. Kimura;A. Takenaka;T. Mifune;Y. Hayashi;T. Yamaguchi
在氯化物（NaCl或KCl）或硫酸盐（Na2SO4或Li2SO4）熔融存在下，以TiO 2和ZrO 2为原料，制备了针状TiZrO 4粉体。从氯化物或硫酸盐体系中得到单相TiZrO_4或三相混合物（TiZrO_4、ZrO_2和无定形TiO_2）。颗粒形态取决于加热温度和持续时间以及作为盐种类。将针状TiZrO4粉体与PbO在750 °C以上反应，得到针状PZT粉体。在750°C下获得的PZT粉末由四面体相和菱面体相组成，表明组成变化很大。加热温度的升高降低了组成变化的程度，但增强了针状颗粒的变形。
Needle-like TiZrO4powder was prepared by reacting TiO2and ZrO2in the presence of molten chloride (NaCI or KCI) or sulphate (Na2SO4or Li2SO4). Either a single-phase TiZrO4or a three-phase mixture (TiZrO4, ZrO2and amorphous TiO2) was obtained from the chloride or sulphate system. Particle morphology was dependent on heating temperature and duration as well as salt species. Needle-like PZT powder was obtained by reacting needle-like TiZrO4powder with PbO above 750 °C. The PZT powder obtained at 750°C was composed of both tetragonal and rhombohedral phases, indicating a wide compositional variation. An increase in heating temperature reduced the degree of compositional variation, but enhanced the deformation of needle-like particles.