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Novel inorganic side high-resistance layer preparation process for increasing flow capacity of zinc oxide piezoresistor

A piezoresistor and preparation technology, which is applied in the direction of piezoresistor, piezoresistor core, coating resistance material, etc., to achieve the effect of reducing the fluctuation of glaze layer thickness and stabilizing the process

Inactive Publication Date: 2019-04-19
TSINGHUA UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0015] The technical problem to be solved in the present invention: in the formulation of the megavolt resistor, through the adjustment of the formula of the high-resistance layer and the control of the process, the shrinkage ratio of the body of the resistor and the glaze layer can be matched, which not only solves the side insulation problem of the resistor , while improving the square wave current capacity of the resistor

Method used

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  • Novel inorganic side high-resistance layer preparation process for increasing flow capacity of zinc oxide piezoresistor

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Effect test

Embodiment 1

[0039] Select the D5 specification resistor, and match the high resistance layer in the following way: 40% zinc oxide, 10% bismuth oxide, 5% cobalt oxide, 5% silicon oxide, 5% tin dioxide, 0.2% gallium oxide, PVA (polyethylene Alcohol) 2.5%, deionized water 32.3%. The prepared raw materials are mixed and heated to dissolve to make a uniform solution, and are directly coated on the side of the resistor sheet after the resistor sheet is formed.

[0040] The following is a detailed description of the specific formula-level production process.

[0041] After the zinc oxide valve plate is prepared by raw materials, mixed by ball milling, spray-dried and pressed into shape:

[0042] 1) Sintering

[0043] Use a high-temperature electric furnace to sinter the green body in a closed atmosphere. The specific temperature and control time are as follows:

[0044] From room temperature to 400°C, the heating time is 10-15 hours;

[0045]Keep low temperature debinding at 280°C for 5 hour...

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Abstract

A novel inorganic side high-resistance layer preparation process for increasing the flow capacity of a zinc oxide piezoresistor. The prepared raw materials are subjected to mixing and heating for dissolution to prepare a uniform solution, the solution is molded at a resistor disc to be directly coated on the side of the resistor disc. The method comprises a raw material preparation step, a ball milling mixing step, a spray drying step, a press molding step, a sintering step, a coating step and a sheet forming step. The raw material preparation step, the ball milling mixing step, the spray drying step, the press molding step, the sintering step and the coating step are performed in order. The high-resistance layer is added after molding to reduce the fluctuation of the thickness of the glaze layer caused by the inconsistent shrinkage rate, and the process is more stable.

Description

technical field [0001] The invention relates to the field of resistor sheet preparation technology, in particular to a new method for a high-resistance layer in the manufacturing process of a nonlinear resistor sheet. Background technique [0002] The ZnO resistor is the core component of the ZnO arrester, so it is a key component that determines the performance of the arrester. In the national standard, the surge arresters whose nominal discharge currents are 5kA and 10kA respectively are required to reach 65kA and 100kA for their ability to withstand two 4 / 10μs high-current shocks. Foreign patent research chooses SiO 2 Fe 2 o 3 System formula, but the ability of D3 and D4 resistors to withstand high current impact can only reach about 60kA and 80kA respectively, which is still a certain distance from the requirements of 65kA and 100kA respectively. Improving the high-current capability of ZnO resistors is a common problem among domestic counterparts. The technical diff...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01C17/06H01C7/112
CPCH01C7/112H01C17/06
Inventor 何金良孟鹏飞胡军谢清云蒙小记胡小定李刚
Owner TSINGHUA UNIV
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