A varistor material

Abstract

The invention discloses a piezoresistor material. The piezoresistor material is prepared from the following raw materials in parts by weight: 98-100 parts of zinc oxide, 50-52 parts of yttria, 3-5 parts of titanium dioxide, 50-52 parts of ytterbia, 2-4 parts of stannic oxide, 1-3 parts of selenium oxide, 5-7 parts of strontium titanate, 2-4 parts of rhenium oxide, 2-4 parts of manganese carbonate, 6-8 parts of silicon dioxide, 4-6 parts of aluminum nitrate and 10-12 parts of rare earth sinter. Yttrium ions and ytterbium ions, with radii close to those of zinc ions, are introduced, so that a traditional formula with zinc oxide as the main component is replaced with a new formula with zinc oxide, yttria and ytterbia as main components. In combination with various additives in the new formula, the prepared piezoresistor material has higher nonlinear coefficients, lower leakage currents, higher heavy current resistance capacity and higher voltage gradient.

Description

technical field [0001] The invention relates to the field of varistor materials, in particular to a varistor material mainly composed of zinc oxide, yttrium oxide and ytterbium oxide. Background technique [0002] Varistor is a resistive device with nonlinear volt-ampere characteristics. It is mainly used for voltage clamping when the circuit is subjected to overvoltage, and absorbs excess current to protect sensitive devices. The English name is "Voltage Dependent Resistor" abbreviated as "VDR", or "Varistor". The resistor material of the varistor is a semiconductor, so it is a variety of semiconductor resistors. The varistor is a voltage limiting protection device. Utilizing the nonlinear characteristics of the varistor, when an overvoltage occurs between the two poles of the varistor, the varistor can clamp the voltage to a relatively fixed voltage value, thereby realizing the protection of the subsequent circuit. The main parameters of varistors are: varistor voltage,...

AI Technical Summary

Problems solved by technology

[0003] However, with the development and progress of science and technology, especially the rapid development of large-scale intelligent circuits, the requirements for components, especially resistors, are getting higher and higher. The current varistors can no longer meet the needs of development. Resistors and resistive materials with high performance and high capacity have been extensively studied, and varistor materials and varistors are one of the important research directions

Images