A zinc oxide resistor and its preparation method and application

A technology of zinc oxide resistors and resistors, which is applied in the direction of resistance manufacturing, resistors, varistors, etc., can solve the problems of unfavorable resistor production safety and environmental protection, affecting the performance of resistors, and high toxicity, and achieves square wave The effects of high current and high current impact resistance, low residual voltage and high potential gradient

Active Publication Date: 2022-02-18
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +6
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Existing traditional ZnO-Bi 2 o 3 There are two types of spinel phases in varistors, α and β, and the β-spinel phase is easy to decompose into pyrochlore phase during cooling, which affects the performance of resistors. ZnO-Bi 2 o 3 It is a varistor film whose formula generally contains Cr 2 o 3 , can suppress the formation of β-spinel phase in the resistive sheet, however Cr 2 o 3 It is a toxic substance, and its toxicity is relatively high, which is not conducive to the production safety and environmental protection of resistors. If Cr is not added 2 o 3 It will also affect the performance of the resistor

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] This embodiment provides a method for preparing a zinc oxide resistance sheet for a DC transmission line lightning arrester, comprising the following steps:

[0049] 1) Batching: Batching is carried out according to the mole percentage of raw materials, and the following raw materials are weighed respectively: ZnO: 85.0mol, Bi 2 o 3 : 4.0mol, Sb 2 o 3 : 4.0mol, Co 2 o 3 : 1.5mol, MnO 2 : 1.5mol, NiO: 1.0mol, Fe 2 o 3 : 1.0mol, A1 2 o 3 : 1.0mol, Dy 2 o 3 : 1.0mol; after weighing, the raw materials are mixed to obtain the mixed material;

[0050] 2) ball milling: add dehydrated alcohol in above-mentioned mixed material as dispersant (the add-on of described dehydrated alcohol is 1.0 times of described mixed material gross weight), with high-speed agitating ball mill (containing diameter is 5mm in the high-speed agitating ball mill) zirconia grinding balls) to grind to obtain the slurry after ball milling, the ball milling speed of the high-speed stirring ball...

Embodiment 2

[0060] This embodiment provides a method for preparing a zinc oxide resistance sheet for a DC transmission line lightning arrester, comprising the following steps:

[0061] 1) Batching: Batching is carried out according to the mole percentage of raw materials, and the following raw materials are weighed respectively: ZnO: 91.5mol, Bi 2 o 3 : 2.5mol, Sb 2 o 3 : 3.5mol, Co 2 o 3 : 0.4mol, MnO 2 : 0.6mol, NiO: 0.6mol, Fe 2 o 3 : 0.2mol, A1 2 o 3 : 0.3mol, Dy 2 o 3 : 0.4mol; After weighing, the raw materials are mixed to obtain the mixed material;

[0062] 2) ball milling: add dehydrated alcohol in above-mentioned mixed material as dispersant (the add-on of described dehydrated alcohol is 0.9 times of described mixed material gross weight), with high-speed agitating ball mill (contain diameter is 5mm in the high-speed agitating ball mill) zirconia grinding balls) to grind to obtain the slurry after ball milling, the ball milling speed of the high-speed stirring ball mi...

Embodiment 3

[0072] This embodiment provides a method for preparing a zinc oxide resistance sheet for a DC transmission line lightning arrester, comprising the following steps:

[0073] 1) Batching: Batching is carried out according to the molar percentage of raw materials, and the following raw materials are weighed respectively: ZnO: 93mol, Bi 2 o 3 : 2.0mol, Sb 2 o 3 : 3.0mol, Co 2 o 3 : 0.3mol, MnO 2 : 0.6mol, NiO: 0.6mol, Fe 2 o 3 : 0.1mol, A1 2 o 3 : 0.1mol, Dy 2 o 3 : 0.3mol; After weighing, the raw materials are mixed to obtain the mixed material;

[0074] 2) ball milling: add dehydrated alcohol in above-mentioned mixed material as dispersant (the add-on of described dehydrated alcohol is 0.8 times of described mixed material gross weight), use high-speed agitating ball mill (containing diameter is 5mm in the high-speed agitating ball mill) The zirconia grinding ball) is ground to obtain the slurry after ball milling, the ball milling speed of the high-speed stirring ba...

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Abstract

The invention relates to the technical field of piezoresistors for lightning arresters, in particular to a zinc oxide resistor and its preparation method and application. The zinc oxide resistance sheet provided by the present invention comprises the following raw materials in molar percentage: 85-95% ZnO, 0.01-4.0% Bi 2 o 3 , 0.01‑4.0% Sb 2 o 3 , 0.05‑3.0% Co 2 o 3 , 0.01‑2.0% MnO 2 , 0.01‑3.0% NiO, 0.01‑2.0% Fe 2 o 3 , 0.01‑2.0% A1 2 o 3 , 0.01‑2.0% Dy 2 o 3 . The zinc oxide resistance sheet provided by the present invention does not need to add the toxic substance Cr 2 o 3 , through ZnO, Bi 2 o 3 , Sb 2 o 3 、Co 2 o 3 , MnO 2 , NiO, Fe 2 o 3 、A1 2 o 3 and Dy 2 o 3 Various components cooperate with each other, so that the zinc oxide resistor has excellent performances such as high potential gradient, high square wave flow capacity, low residual voltage, high square wave current and high current impact resistance, and good aging resistance.

Description

technical field [0001] The invention relates to the technical field of piezoresistors for lightning arresters, in particular to a zinc oxide resistor and its preparation method and application. Background technique [0002] Surge arresters are key equipment for power grids and power equipment to prevent lightning strikes and flashover accidents, and zinc oxide resistors are widely used in the manufacture of surge arresters because of their excellent nonlinear volt-ampere characteristics and impact energy absorption capacity. Since Panasonic Corporation of Japan invented the nonlinear zinc oxide resistor in 1968, there have been many manufacturers of zinc oxide resistors and zinc oxide arresters in China, but there is still a big gap in product quality compared with foreign advanced levels. In terms of low flow capacity, small potential gradient, and weak impact resistance. In 2015, my country successfully developed the world's first ±800kV DC line lightning arrester, which ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/453C04B35/622C04B35/64C04B41/90H01C7/112H01C17/30H01C7/12
CPCC04B35/453C04B35/622C04B35/64C04B41/90C04B41/52H01C7/112H01C17/30H01C7/12C04B2235/3298C04B2235/3294C04B2235/3275C04B2235/3279C04B2235/3267C04B2235/3272C04B2235/3217C04B2235/3224C04B2235/6562C04B2235/6567C04B2235/6565C04B2235/661C04B2235/786C04B2235/96
Inventor 祝志祥张强陈保安丁一陈新汪胜和郝留成许衡曹伟王轲龚文吴超峰
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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