Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of barium titanate powder
The invention discloses a preparation method of barium titanate powder, and the preparation method comprises the following steps: S1, mixing a barium source solution, a part of polyvinylpyrrolidone solution and a titanium source solution to obtain a mixed solution; s2, adjusting the pH value of the mixed solution to be greater than 12; s3, raising the temperature, then mixing with the residual polyvinylpyrrolidone solution to react, and collecting a solid; and S4, calcining the solid to prepare the barium titanate powder. According to the method, the problems that in the preparation process of the barium titanate powder, the powder is prone to agglomerate, crystal grains are prone to excessively grow, and the crystal grains are not distributed are solved in a two-step PVP adding mode, gas can be generated in the calcination process of PVP, agglomeration of barium titanate particles is further hindered, and the particle size of the barium titanate powder is reduced. Therefore, the barium titanate powder which is good in dispersity, narrow in particle size distribution and high in tetragonal phase proportion is obtained, and the raw material requirements of high-end MLCC products are met.
本发明公开了一种钛酸钡粉体的制备方法，所述制备方法包括以下步骤：S1：将钡源溶液、部分聚乙烯吡咯烷酮溶液、钛源溶液混合，得到混合液；S2：调节所述混合液的pH，使pH＞12；S3：升温，然后与剩余聚乙烯吡咯烷酮溶液混合反应，收集固体；S4：将所述固体煅烧，制得所述钛酸钡粉体。本发明通过两步添加PVP的方式解决了钛酸钡粉体制备过程中存在的粉体易团聚，晶粒易过度长大，晶粒分布不均等问题，且PVP在煅烧过程中可以产生气体，进一步阻碍钛酸钡颗粒的团聚，从而得到分散性好、粒径分布较窄、四方相占比高的钛酸钡粉体，满足高端MLCC产品的原料要求。
Preparation method of barium titanate powder
The invention discloses a preparation method of barium titanate powder, and the preparation method comprises the following steps: S1, mixing a barium source solution, a part of polyvinylpyrrolidone solution and a titanium source solution to obtain a mixed solution; s2, adjusting the pH value of the mixed solution to be greater than 12; s3, raising the temperature, then mixing with the residual polyvinylpyrrolidone solution to react, and collecting a solid; and S4, calcining the solid to prepare the barium titanate powder. According to the method, the problems that in the preparation process of the barium titanate powder, the powder is prone to agglomerate, crystal grains are prone to excessively grow, and the crystal grains are not distributed are solved in a two-step PVP adding mode, gas can be generated in the calcination process of PVP, agglomeration of barium titanate particles is further hindered, and the particle size of the barium titanate powder is reduced. Therefore, the barium titanate powder which is good in dispersity, narrow in particle size distribution and high in tetragonal phase proportion is obtained, and the raw material requirements of high-end MLCC products are met.
本发明公开了一种钛酸钡粉体的制备方法，所述制备方法包括以下步骤：S1：将钡源溶液、部分聚乙烯吡咯烷酮溶液、钛源溶液混合，得到混合液；S2：调节所述混合液的pH，使pH＞12；S3：升温，然后与剩余聚乙烯吡咯烷酮溶液混合反应，收集固体；S4：将所述固体煅烧，制得所述钛酸钡粉体。本发明通过两步添加PVP的方式解决了钛酸钡粉体制备过程中存在的粉体易团聚，晶粒易过度长大，晶粒分布不均等问题，且PVP在煅烧过程中可以产生气体，进一步阻碍钛酸钡颗粒的团聚，从而得到分散性好、粒径分布较窄、四方相占比高的钛酸钡粉体，满足高端MLCC产品的原料要求。
Preparation method of barium titanate powder
一种钛酸钡粉体的制备方法
MA YANHONG (Autor:in) / SUN JIAN (Autor:in) / ZHANG LEI (Autor:in) / FANG KEKE (Autor:in)
12.11.2024
Patent
Elektronische Ressource
Chinesisch
Preparation method of barium zirconate titanate powder
| Europäisches Patentamt | 2015