A kind of titanium dioxide high-voltage varistor and its preparation method

A technology of varistors and titanium dioxide, which is applied in the direction of varistor cores, varistors, resistors, etc., can solve the problems of low potential gradient of unsuitable varistors and titanium dioxide varistors, and achieve Improved square wave flow capacity, short sintering time and low cost

Active Publication Date: 2020-11-20
襄阳市三三电气有限公司
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Problems solved by technology

However, the existing formula and manufacturing process make the potential gradient of titanium dioxide varistors low, generally less than 200V / mm, so it is not suitable for making high-voltage (high potential gradient) varistors

Method used

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  • A kind of titanium dioxide high-voltage varistor and its preparation method

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Embodiment Construction

[0026] The technical solution of the present invention will be further described below.

[0027] The formula of the titanium dioxide high-voltage varistor of the present invention is proportioned according to weight percentage: 75-79.1% of titanium dioxide, 10-14.1% of zinc oxide, 2.2-2.226% of bismuth oxide, 0.3-0.369% of manganese dioxide, antimony trioxide 0.5-0.569%, nickelous oxide 2.1-2.133%, cobalt oxide 1.2-1.268%, silicon carbide 1.2-1.263%, chromium oxide 0.4-0.439%, boron glass powder 3-3.2%. The titanium dioxide high-voltage varistor of the present invention improves the nonlinear coefficient and dielectric constant of the varistor by using titanium dioxide as the main raw material, reduces the dielectric loss, and improves the varistor by adding zinc oxide and bismuth oxide auxiliary materials. Potential gradient, and add manganese dioxide, antimony trioxide, nickel oxide, cobalt oxide, silicon carbide, chromium oxide, boron glass powder and other auxiliary materi...

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Abstract

The invention relates to a preparation method of a varistor and particularly relates to a titanium dioxide high-voltage varistor and a preparation method thereof. According to the titanium dioxide high-voltage varistor provided by the invention, the titanium dioxide serves as a main raw material, so that the non-linear coefficient and the dielectric constant of the varistor are improved and the dielectric loss is reduced; auxiliary materials such as zinc oxide and bismuth oxide are added, so that the electric potential gradient of the varistor is improved; and auxiliary materials such as manganese dioxide, antimony trioxide, nickel protoxide, cobalt oxide, silicon carbide, chromium oxide and boron glass powder are added, so that the electrical properties, such as square wave capacity, high-current resistant ability and ageing coefficient, of the varistor are improved. The titanium dioxide high-voltage varistor provided by the invention has the characteristics of high electric potentialgradient, short sintering time and low cost.

Description

technical field [0001] The invention relates to a preparation method of a piezoresistor, in particular to a titanium dioxide high-voltage piezoresistor and a preparation method thereof. Background technique [0002] At present, most of the common varistors on the market are zinc oxide varistors. Zinc oxide varistors are non-linear devices and are the core devices for making lightning arresters, but the performance parameters are difficult to control during production. The production process It is more complicated, and the sintering time of the production process is longer at the same time, and the manufacturing cost is also higher. [0003] Compared with zinc oxide varistors, titanium dioxide varistors have higher nonlinear coefficient, ultra-high dielectric constant, and lower dielectric loss. However, the existing formula and manufacturing process make the potential gradient of titanium dioxide varistors low, generally less than 200V / mm, so it is not suitable for making h...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/46C04B35/622H01C17/00H01C17/06H01C7/115
CPCC04B35/46C04B35/622C04B2235/3241C04B2235/3267C04B2235/3275C04B2235/3279C04B2235/3284C04B2235/3294C04B2235/3298C04B2235/36C04B2235/3826H01C7/115H01C17/00H01C17/06
Inventor 李杨李文联
Owner 襄阳市三三电气有限公司
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