Method for preparing high-potential gradient zinc oxide piezoresistance by low-temperature sintering

Abstract

The preparation method for high-potential gradient ZnO piezoresistor material comprises: with high-energy ball grinding technology, adding rare earth oxides included Bi2O3, Sb2O3, Cr2O3, Co2O3, MnO2, and Y2O3; sintering at 800Deg, and obtaining the product. The advantages of this invention comprises: simple process technology, low sintering temperature, fit to traditional device, well properties of the product, 5.50-5.64g / cm3 density, 1845.66-2233.33V / mm voltage-sensitive potential gradient, 21.3-25.8 nonlinear index, and 1.55-10.2muA drain current (given 0.75V1mA).

Description

technical field

[0001] The invention relates to a method for preparing a high-potential gradient zinc oxide varistor, belonging to the technical field of varistor manufacture. Background technique

[0002] Zinc oxide varistors have excellent volt-ampere characteristics and are widely used in the manufacture of arrester valves. In order to realize the miniaturization and light weight of the arrester valve plate and reduce the manufacturing cost, the development of high potential gradient is the development trend [1] . Viswanath [2] Zinc oxide varistors with a potential gradient as high as 3000V / mm were prepared at a sintering temperature of 750°C by using ultrafine nanopowder obtained by gel suspension and centrifugal separation. Duran [3] The nano-powder prepared by chemical method was also used to prepare zinc oxide varistors with a potential gradient of 2000V / mm at two-stage sintering temperatures of 900°C and 825°C. The above two methods all have the disadvantages of...