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Voltage-sensitive ceramic material and preparation method thereof

A technology for pressure-sensitive ceramics and raw materials, applied in the field of ceramic processing, can solve problems such as lack of pressure-sensitive performance and poor pressure-sensitive performance, and achieve the effects of low cost, favorable industrial scale production, and simple process

Inactive Publication Date: 2014-01-08
陈锐群
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

201210130308.9 disclosed a SnO 2 -Zn 2 SnO 4 Composite pressure-sensitive ceramics and its preparation method have simple process and can be used in large-scale industrial production, but the pressure-sensitive performance is not good
However, 201210093569.8 discloses a low-temperature sintered zinc oxide varistor ceramic material and its preparation method. The process is simple, the energy consumption is small, and it is environmentally friendly, but there is still a problem of lack of varistor performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] A pressure-sensitive ceramic material consisting of the following components in parts by weight:

[0018] ZnO 94 parts, Bi 2 o 3 0.8 parts, Sb 2 o 3 1.2 parts, CoO 1.0 parts, MnCO 3 0.5 parts, Cr 2 o 3 0.5 parts, NiO 0.5 parts, Pr 6 o 11 1.5 servings.

[0019] Its preparation method comprises the following steps:

[0020] The particle size of the ZnO raw material is 0.40 μm, and the bulk density is 0.65 g / cm 3 , the particle size of the additive raw material is 5 μm, and the bulk density is 1.4 g / cm 3 ; Pour the above-mentioned substances into a stirring ball mill in proportion, and add pure water whose weight is 85% of the total weight of the additive, and ball mill for 2 hours until the particle size is less than 1.3 μm, and then heat the resulting mixed solution to 100°C, Continue heat preservation and stirring to evaporate the solvent to a viscous paste, dry the paste, and then heat it at 580°C for 8 hours; finally perform ball milling, and finally ob...

Embodiment 2

[0022] A pressure-sensitive ceramic material consisting of the following components in parts by weight:

[0023] ZnO 93.7 parts, Bi 2 o 3 0.8 parts, Sb 2 o 3 1.2 parts, CoO 1.0 parts, MnCO 3 0.5 parts, Cr 2 o 3 0.5 parts, NiO 0.8 parts, Pr 6 o 11 1.5 servings.

[0024] Its preparation method comprises the following steps:

[0025] The particle size of the ZnO raw material is 0.41 μm, and the bulk density is 0.75 g / cm 3 , the particle size of the additive raw material is 5 μm, and the bulk density is 1.4 g / cm 3 ; Pour the above-mentioned substances into a stirring ball mill in proportion, and add pure water whose weight is 85% of the total weight of the additive, and ball mill for 2 hours until the particle size is less than 1.3 μm, and then heat the resulting mixed solution to 100°C, Continue heat preservation and stirring to evaporate the solvent to a viscous paste, dry the paste, and then heat it at 580°C for 8 hours; finally perform ball milling, and finally ...

Embodiment 3

[0027] A pressure-sensitive ceramic material consisting of the following components in parts by weight:

[0028] ZnO 94.2 parts, Bi 2 o 3 0.6 parts, Sb 2 o 3 1.2 parts, CoO 1.0 parts, MnCO 3 0.5 parts, Cr 2 o 3 0.5 parts, NiO 0.5 parts, Pr 6 o 11 1.5 servings.

[0029] Its preparation method comprises the following steps:

[0030] The particle size of the ZnO raw material is 0.41 μm, and the bulk density is 0.75 g / cm 3 , the particle size of the additive raw material is 5 μm, and the bulk density is 1.4 g / cm 3 ; Pour the above-mentioned substances into a stirring ball mill in proportion, and add pure water whose weight is 85% of the total weight of the additive, and ball mill for 2 hours until the particle size is less than 1.3 μm, and then heat the resulting mixed solution to 100°C, Continue heat preservation and stirring to evaporate the solvent to a viscous paste, dry the paste, and then heat it at 500°C for 7 hours; finally perform ball milling, and finally ...

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Abstract

The invention relates to a voltage-sensitive ceramic material and a preparation method thereof, belonging to the field of ceramic process technologies. The voltage-sensitive ceramic material comprises the following components: 93-95 parts of ZnO, 0.6-0.8 part of Bi2O3, 0.9-1.3 parts of Sb2O3, 1.0-1.3 parts of CoO, 0.5-0.8 part of MnCO3, 0.5-0.8 part of Cr2O3, 0.5-0.8 part of NiO, and 1.0-1.5 parts of Pr6O11. The preparation method comprises the following steps of pouring the components into a stirring ball mill according to proportion, adding pure water of 85-93% of the total weight of additives, ball milling for 2-4 hours till the grain size is less than 1.3mu m, then heating the obtained mixed solution up to 85-100 DEG C, keeping warm and stirring continuously till the solvent is evaporated and becomes paste, drying the paste, keeping warm for 6-8 hours at 500-580 DEG C, finally ball milling, and obtaining the zinc oxide voltage-sensitive ceramic compound powder. The ceramic material has excellent voltage-sensitive property, has a simple preparation method, has no toxicity and no environment contamination, and is beneficial to industrial large scale production.

Description

technical field [0001] The invention relates to a ceramic material and a preparation method thereof, in particular to a pressure-sensitive ceramic material and a preparation method thereof, and belongs to the technical field of ceramic processing. Background technique [0002] Varistor ceramics refer to semiconductor ceramics whose resistance value has a significant nonlinear change with the change of applied voltage. It has nonlinear volt-ampere characteristics. When this critical voltage is exceeded, the resistance will change sharply, and a current will flow. With a small increase in voltage, the current will increase rapidly. At present, there are four main types of varistor ceramics: SiC, TiO2, SrTiO3 and ZnO, but zinc oxide varistor ceramics are widely used and have the best performance. Since ZnO varistor ceramics have good pressure-sensitive characteristics, they are widely used in power systems, electronics It is widely used in various devices such as lines and hou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/453C04B35/626
Inventor 陈锐群
Owner 陈锐群
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