Preparation method and application of a pressure-sensitive ceramic material
A technology of varistor ceramics and powder materials, applied in varistors, varistor cores, etc., can solve the problems of low nonlinear coefficient and high varistor voltage, and achieve the effect of simplifying the manufacturing process and improving performance
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Embodiment 1
[0022] Described in this embodiment (Ge, Nb 2 o 5 , Y 2 o 3 ) co-doped TiO 2 The preparation method of pressure-sensitive ceramics, concrete steps are as follows:
[0023] (1) Ge powder (with a particle size of 45 μm), Nb 2 o 5 (particle size 45μm) powder and Y 2 o 3 (particle size 45 μm) powder was added to the TiO 2 (with a particle size of 45 μm) mixed uniformly with the powder to obtain a mixed material, the mass percentage of Ge powder in the mixed material is 0.90%, Nb 2 o 5 The mass percentage of Y is 0.66%, Y 2 o 3 The mass percentage is 0.56%, and the rest is TiO 2 ;
[0024] (2) Ball mill the mixed powder prepared in step (1) (add water and alcohol to ball mill and mix for 6 hours), dry, pass through a 300-mesh standard sieve, and then granulate (granulation process: press the dried powder and polyvinyl alcohol aqueous solution The mass ratio is 10:1. Add polyvinyl alcohol aqueous solution to the powder and grind for 15 minutes. After passing through a ...
Embodiment 2
[0029] Described in this embodiment (Ge, Nb 2 o 5 , Y 2 o 3 ) co-doped TiO 2 The preparation method of pressure-sensitive ceramics, concrete steps are as follows:
[0030] (1) Ge powder (particle size: 30μm), Nb 2 o 5 (30μm particle size) powder and Y 2 o 3 (particle size 30 μm) powder was added to the TiO 2 (with a particle size of 30 μm) mixed uniformly with powder to obtain a mixed material, the mass percentage of Ge powder in the mixed material was 1.8%, Nb 2 o 5 The mass percentage is 1.0%, Y 2 o 3 The mass percentage is 0.56%, and the rest is TiO 2 ;
[0031] (2) Ball mill the mixed powder prepared in step (1) (add water and alcohol to ball mill and mix for 8 hours), dry, pass through a 320-mesh standard sieve, and then granulate (granulation process: press the dried powder and polyvinyl alcohol aqueous solution The mass ratio is 8:1, adding polyvinyl alcohol aqueous solution to the powder and grinding for 20 minutes, passing through a 42-mesh standard siev...
Embodiment 3
[0036] Described in this embodiment (Ge, Nb 2 o 5 , Y 2 o 3 ) co-doped TiO 2 The preparation method of pressure-sensitive ceramics, concrete steps are as follows:
[0037] (1) Ge powder (particle size is 20μm), Nb 2 o 5 (particle size 20μm) powder and Y 2 o 3 (particle size 20 μm) powder was added to the TiO 2 (with a particle size of 20 μm) mixed uniformly with the powder to obtain a mixed material, the mass percentage of Ge powder in the mixed material was 2.68, Nb 2 o 5 The mass percentage is 1.6%, Y 2 o 3 The mass percentage is 1.39%, and the rest is TiO 2 ;
[0038] (2) Ball mill the mixed powder prepared in step (1) (add water and alcohol to ball mill and mix for 12 hours), dry, pass through a 350-mesh standard sieve, and then granulate (granulation process: press the dried powder and polyvinyl alcohol aqueous solution The mass ratio is 5:1, adding polyvinyl alcohol aqueous solution to the powder and grinding for 30 minutes. After passing through a 40-mesh ...
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