Method for preparing barium titanate powder through solid-phase synthesis
A barium titanate powder, solid-phase synthesis technology, applied in titanate, alkaline earth metal titanate, chemical instruments and methods, etc., can solve the problems of coarse particles and uneven particles, and achieve high sintering activity and product quality. Stable quality, high square effect
Pending Publication Date: 2021-09-07
SHENZHEN INST OF ADVANCED ELECTRONICS MATERIALS +1
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Problems solved by technology
[0005] The products of the traditional solid-phase method have problems such as coarse particles and uneven particles, and the particle size is usually positively correlated with the tetragonality, so it is difficult to obtain high tetragonality while ensuring a small particle size
Method used
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Embodiment 1
[0036] a. Powder (particle size about 85nm, see figure 1 ) weighed 20g, and pushed it into the middle part of the chamber of the laboratory rotary furnace with a shovel;
[0037] b. Set the heating rate of the rotary furnace to 10°C / min, keep the temperature for 3 hours after the initial temperature rises to 800°C, then raise the temperature to 1000°C at 20°C / min, keep the temperature for 3 hours, and then cool down to the initial temperature at 10°C / min; The tube body rotational speed that the rotary kiln is set is 4 revolutions / minute;
[0038] c. Start the heating program.
[0039] After the experiment is completed, collect the product powder with a receiving shovel, and the code is marked as 4R800 / 3h-1000 / 3h.
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The invention relates to a preparation method and application of barium titanate powder, and particularly discloses a method for preparing the barium titanate powder through solid-phase synthesis, the barium titanate powder prepared through the method and application of the barium titanate powder in a multilayer ceramic capacitor (MLCC). The barium titanate powder is prepared by using a rotary furnace low-high temperature two-stage calcination method, and an improved solid-phase synthesis method is adopted, so the raw materials are uniformly heated in the calcination process, and the obtained product is stable in quality. According to the method provided by the invention, the barium titanate powder with small particle size, high tetragonality and high sintering activity can be obtained, and the barium titanate powder can meet the requirement of the electronic ceramic industry for high-quality barium titanate, so that the barium titanate powder can be used for a multilayer ceramic capacitor (MLCC); on the other hand, the particle size can be regulated and controlled by adjusting the calcination temperature and calcination time, and the particle size is controllable.
Description
technical field [0001] The invention relates to the technical field of ceramic powder preparation, in particular to a method for preparing barium titanate powder by solid phase synthesis. Background technique [0002] As a ferroelectric material, barium titanate ceramics are widely used in the electronics industry, especially in the field of ceramic capacitors. The market share is mainly multilayer ceramic capacitors made of barium titanate. Preparation of High Performance BaTiO 3 The first step in the base ceramic is to synthesize high-performance BaTiO with high purity, small particle size, high tetragonality, and uniform morphology. 3 Powder. [0003] Industrial preparation of BaTiO 3 The traditional methods of powder are liquid phase method and solid phase method. On the one hand, the cost of the liquid phase method is high, on the other hand, the solution ions form a lattice from scratch, which will inevitably introduce more lattice defects and reduce its practicabi...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C01G23/00
CPCC01G23/006C01P2002/72C01P2004/03C01P2002/77
Inventor 张蕾司韶康厉琨于淑会孙蓉付振晓曹秀华任海东
Owner SHENZHEN INST OF ADVANCED ELECTRONICS MATERIALS
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