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Preparation method of nano barium titanate
The preparation method comprises the following steps: adding deionized water into a reaction kettle, starting a stirring device, adding a sodium hydroxide solution to adjust the pH value of the solution to 13.0-14.0, adding a dispersing agent, and heating the solution; nitrogen is introduced into the reaction kettle for purging, and then nitrogen is introduced to a certain pressure; adding the barium chloride solution, the titanium tetrachloride solution and the sodium hydroxide solution into a reaction kettle in a parallel flow manner, controlling the pH value of a reaction system to be 13.0-14.0, and curing; and discharging the reacted material from the reaction kettle, carrying out suction filtration and washing, and drying and roasting a filter cake to obtain the nano barium titanate. The dispersing agent is introduced into a reaction system, reactants are added at a constant speed in a parallel flow mode, and the reaction is carried out under nitrogen pressurization and high-speed stirring, so that particle agglomeration and impurity generation in the reaction and roasting process are reduced, and nano barium titanate with high purity, small particles and good dispersity can be prepared.
本发明公开了一种纳米钛酸钡的制备方法，包括：在反应釜中加入去离子水，启动搅拌装置，加入氢氧化钠溶液调节溶液的pH值为13.0‑14.0，加入分散剂，加热溶液；在反应釜内通入氮气进行吹扫，再充入氮气至一定压力；将氯化钡溶液、四氯化钛溶液和氢氧化钠溶液并流加入反应釜中，控制反应体系的pH为13.0‑14.0，熟化；将反应后物料从反应釜中放出，抽滤洗涤，滤饼烘干和焙烧后即得纳米钛酸钡。本发明通过在反应体系中引入分散剂，利用并流方式匀速加入反应物，并使反应在氮气加压和高速搅拌下进行，减少了反应和焙烧过程中颗粒的团聚及杂质的生成，可制备出纯度高、颗粒小、分散性好的纳米钛酸钡。
Preparation method of nano barium titanate
The preparation method comprises the following steps: adding deionized water into a reaction kettle, starting a stirring device, adding a sodium hydroxide solution to adjust the pH value of the solution to 13.0-14.0, adding a dispersing agent, and heating the solution; nitrogen is introduced into the reaction kettle for purging, and then nitrogen is introduced to a certain pressure; adding the barium chloride solution, the titanium tetrachloride solution and the sodium hydroxide solution into a reaction kettle in a parallel flow manner, controlling the pH value of a reaction system to be 13.0-14.0, and curing; and discharging the reacted material from the reaction kettle, carrying out suction filtration and washing, and drying and roasting a filter cake to obtain the nano barium titanate. The dispersing agent is introduced into a reaction system, reactants are added at a constant speed in a parallel flow mode, and the reaction is carried out under nitrogen pressurization and high-speed stirring, so that particle agglomeration and impurity generation in the reaction and roasting process are reduced, and nano barium titanate with high purity, small particles and good dispersity can be prepared.
本发明公开了一种纳米钛酸钡的制备方法，包括：在反应釜中加入去离子水，启动搅拌装置，加入氢氧化钠溶液调节溶液的pH值为13.0‑14.0，加入分散剂，加热溶液；在反应釜内通入氮气进行吹扫，再充入氮气至一定压力；将氯化钡溶液、四氯化钛溶液和氢氧化钠溶液并流加入反应釜中，控制反应体系的pH为13.0‑14.0，熟化；将反应后物料从反应釜中放出，抽滤洗涤，滤饼烘干和焙烧后即得纳米钛酸钡。本发明通过在反应体系中引入分散剂，利用并流方式匀速加入反应物，并使反应在氮气加压和高速搅拌下进行，减少了反应和焙烧过程中颗粒的团聚及杂质的生成，可制备出纯度高、颗粒小、分散性好的纳米钛酸钡。
Preparation method of nano barium titanate
一种纳米钛酸钡的制备方法
HUANG SENHONG (Autor:in)
08.12.2023
Patent
Elektronische Ressource
Chinesisch
| Europäisches Patentamt | 2020
Preparation method of tetragonal phase nano barium titanate
| Europäisches Patentamt | 2020