Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Preparation method of small-particle-size high-purity tetragonal-phase barium titanate powder
The invention discloses a preparation method of small-particle-size high-purity tetragonal-phase barium titanate powder, which comprises the following steps: 1) mixing barium carbonate and titanium dioxide to obtain a first mixture; 2) dispersing the first mixture in dispersion liquid containing a dispersing agent, adjusting the pH value of the dispersion liquid, and stirring and mixing to obtain slurry with the solid content of 20-40%; 3) performing spray drying on the slurry through spray drying equipment to obtain a second mixture; 4) placing the second mixture in a rotatable crucible, and continuously introducing active gas in a radio frequency environment to obtain powder; and 5) calcining the powder to obtain the barium titanate powder. According to the preparation method, the titanium dioxide and the barium carbonate are mixed and stirred and then spray-dried to form the powder with good fluidity, and the surface of the powder is activated by using the active gas in the rotating crucible, so that uniform activation of the powder can be ensured, impurities are prevented from being introduced, raw materials with large specific surface area do not need to be introduced, and the cost of the raw materials is reduced.
本发明公开了一种小粒径高纯四方相钛酸钡粉体的制备方法，其包括：1)将碳酸钡和二氧化钛混合，得到第一混合物；2)将所述第一混合物分散于含有分散剂的分散液内，调节分散液的pH值并搅拌混合得到20％‑40％固含量的浆料；3)将所述浆料通过雾化干燥设备进行喷雾干燥，得到第二混合物；4)将所述第二混合物置于可旋转的坩埚内，在射频环境下持续通入活性气体，得到粉料；5)将所述粉料进行煅烧得到钛酸钡粉体。该制备方法将二氧化钛与碳酸钡混合搅拌再进行喷雾干燥形成流动性良好的粉体，并在旋转的坩锅中利用活性气体对粉体表面活化，可保证粉体均匀活化，避免了引入的杂质且不需要引入比表面积较大的原料，降低了原料成本。
Preparation method of small-particle-size high-purity tetragonal-phase barium titanate powder
The invention discloses a preparation method of small-particle-size high-purity tetragonal-phase barium titanate powder, which comprises the following steps: 1) mixing barium carbonate and titanium dioxide to obtain a first mixture; 2) dispersing the first mixture in dispersion liquid containing a dispersing agent, adjusting the pH value of the dispersion liquid, and stirring and mixing to obtain slurry with the solid content of 20-40%; 3) performing spray drying on the slurry through spray drying equipment to obtain a second mixture; 4) placing the second mixture in a rotatable crucible, and continuously introducing active gas in a radio frequency environment to obtain powder; and 5) calcining the powder to obtain the barium titanate powder. According to the preparation method, the titanium dioxide and the barium carbonate are mixed and stirred and then spray-dried to form the powder with good fluidity, and the surface of the powder is activated by using the active gas in the rotating crucible, so that uniform activation of the powder can be ensured, impurities are prevented from being introduced, raw materials with large specific surface area do not need to be introduced, and the cost of the raw materials is reduced.
本发明公开了一种小粒径高纯四方相钛酸钡粉体的制备方法，其包括：1)将碳酸钡和二氧化钛混合，得到第一混合物；2)将所述第一混合物分散于含有分散剂的分散液内，调节分散液的pH值并搅拌混合得到20％‑40％固含量的浆料；3)将所述浆料通过雾化干燥设备进行喷雾干燥，得到第二混合物；4)将所述第二混合物置于可旋转的坩埚内，在射频环境下持续通入活性气体，得到粉料；5)将所述粉料进行煅烧得到钛酸钡粉体。该制备方法将二氧化钛与碳酸钡混合搅拌再进行喷雾干燥形成流动性良好的粉体，并在旋转的坩锅中利用活性气体对粉体表面活化，可保证粉体均匀活化，避免了引入的杂质且不需要引入比表面积较大的原料，降低了原料成本。
Preparation method of small-particle-size high-purity tetragonal-phase barium titanate powder
小粒径高纯四方相钛酸钡粉体的制备方法
HE JUJU (Autor:in) / HU LINZHENG (Autor:in) / SHEN XIAOYAN (Autor:in)
14.11.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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