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Resistor disc and preparation process thereof, and zinc oxide lightning arrester

A technology for manufacturing technology and resistors, which is applied in the direction of resistors, resistor manufacturing, and piezoresistor cores, etc., to achieve the effects of saving manufacturing process costs, improving contact, high-current impact capability, and improving aging performance

Pending Publication Date: 2022-04-19
GLOBAL ENERGY INTERCONNECTION RES INST CO LTD +4
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But in traditional ZnO-Bi 2 o 3 In the formula of the varistor film, because there are two types of spinel phases (α, β) in the resistance film, the β-spinel phase is easy to decompose into pyrochlore phase during the cooling process, Cr 2 o 3 have the effect of inhibiting the formation of β-spinel, but Cr 2 o 3 As a toxic substance, it is necessary to develop zinc oxide resistors that are more environmentally friendly and have excellent performance

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] The resistive sheet preparation process of this example comprises the following steps:

[0040] 1) Ingredients: prepared according to the mole percentage of raw materials, the specific formula is as follows: ZnO: 88.0%, Bi 2 o 3 : 3.0%, Sb 2 o 3 : 1.0%, Co 3 o 4 : 1.0%, MnO 2 : 2.0%, NiO: 2.0%, SiO 2 : 2.0%, Y 2 o 3 : 1.0%. The purity of all raw materials is above 99.5%, among which ZnO, NiO, SiO 2 The raw material powders are all nano-scale powder materials, the particle size of ZnO is 50±10nm, the particle size of NiO is less than 30nm, and the particle size of SiO 2 The particle size is 100-150nm;

[0041] 2) Ball milling: Add absolute ethanol as a dispersant to the above-mentioned prepared raw materials according to 1.0 times the weight of the raw materials, and grind them with zirconia grinding balls with a diameter of 5mm. The ball milling speed of the high-speed stirring ball mill is 200r / min. Time 36h;

[0042] 3) Granulation: Dry the ball-milled sl...

Embodiment 2

[0051] A preparation process of a resistance sheet of the present example comprises the following steps:

[0052] 1) Ingredients: Prepared according to the mole percentage of raw materials, the specific formula is as follows: ZnO: 91.5%, Bi 2 o 3 : 2.3%, Sb 2 o 3 : 1.2%, Co 3 o 4 : 1.0%, MnO 2 : 1.0%, NiO: 1.0%, SiO 2 : 1.2%, Y 2 o 3 : 0.8%. The purity of all raw materials is above 99.5%, among which ZnO, NiO, SiO 2 The raw material powders are all nano-scale powder materials, the particle size of ZnO is 50±10nm, the particle size of NiO is less than 30nm, and the particle size of SiO 2 The particle size is 100-150nm;

[0053] 2) Ball milling: Add absolute ethanol as a dispersant to the above-mentioned prepared raw materials according to 1.0 times the weight of the raw materials, and grind them with zirconia grinding balls with a diameter of 5mm. The ball milling speed of the high-speed stirring ball mill is 200r / min. Time 36h;

[0054] 3) Granulation: Dry the bal...

Embodiment 3

[0063] A preparation process of a resistance sheet of the present example comprises the following steps:

[0064] 1) Ingredients: prepared according to the mole percentage of raw materials, the specific formula is as follows: ZnO: 93.5%, Bi 2 o 3 : 2.3%, Sb 2 o 3 : 0.5%, Co 3 o 4 : 0.5%, MnO 2 : 0.6%, NiO: 0.6%, SiO 2 : 1.5%, Y 2 o 3 : 0.5%. The purity of all raw materials is above 99.5%, among which ZnO, NiO, SiO 2 The raw material powders are all nano-scale powder materials, the particle size of ZnO is 50±10nm, the particle size of NiO is less than 30nm, and the particle size of SiO 2 The particle size is 100-150nm;

[0065] 2) Ball milling: the above-mentioned prepared raw materials are added to 0.9 times the weight of the raw materials, added with absolute ethanol as a dispersant, and ground with zirconia grinding balls with a diameter of 5mm. The ball milling speed of the high-speed stirring ball mill is 250r / min. Time 24h;

[0066] 3) Granulation: Dry the ba...

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Abstract

The invention relates to a resistor disc and a preparation process thereof as well as a zinc oxide arrester. The resistor disc is prepared from the following powdery components in percentage by mole: 88 to 95 percent of ZnO, 0.01 to 4.0 percent of Bi2O3, 0.01 to 2.0 percent of Sb2O3, 0.05 to 2.0 percent of Co3O4, 0.01 to 2.0 percent of MnO2, 0.01 to 2.0 percent of NiO, 0.05 to 3.0 percent of SiO2 and 0.01 to 1.0 percent of Y2O3, wherein the purity of the components is more than 99.5 percent. Wherein the particle size of ZnO is 50 + / -10 nm, the particle size of NiO is smaller than 30 nm, and the particle size of SiO2 is 100-150 nm. The resistor disc provided by the invention has excellent performance such as high potential gradient, low residual voltage, high square wave and large current impact resistance, small leakage current and the like, and excellent comprehensive performance indexes enable the resistor disc to meet the performance requirements of the piezoresistor disc for the lightning arrester of the ultra-high-voltage and extra-high-voltage direct-current power transmission line.

Description

technical field [0001] The invention relates to the technical field of varistor sheets for lightning arresters, in particular to a resistor sheet, a preparation process thereof, and a zinc oxide lightning arrester. Background technique [0002] Zinc oxide (ZnO) varistor is a multi-component metal oxide polycrystalline semiconductor ceramic made of ZnO as the main raw material. It has excellent nonlinear volt-ampere characteristics and energy absorption capacity. Varistor valves have been widely used in the power protection industry. The voltage gradient, nonlinear coefficient and leakage current are important parameters to reflect the performance of ZnO varistors. The performance of ZnO varistors can be effectively regulated by adjusting the formula components and controlling the sintering process. The application of ZnO varistors with high voltage gradient and low leakage current can not only reduce the size and weight of the arrester, but also improve the response speed o...

Claims

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Application Information

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IPC IPC(8): H01C7/112H01C7/108H01C7/105H01C7/12H01C17/00H01C17/02H01C17/28H01C17/30
CPCH01C7/112H01C7/108H01C7/105H01C7/12H01C17/00H01C17/30H01C17/281H01C17/02
Inventor 祝志祥曹伟王剑谷山强万帅严波郑世玲刘静张强陈保安陈新
Owner GLOBAL ENERGY INTERCONNECTION RES INST CO LTD
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