SnO2 piezoresistor with high nonlinearity, low residual voltage and large discharge current capacity for power transmission of power system, and preparation method thereof

Abstract

The invention discloses a SnO2 piezoresistor with high nonlinearity, low residual voltage and large discharge current capacity for power transmission of a power system, and a preparation method thereof. The piezoresistor comprises SnO2, Co3O4, Cr2O3, Ni2O3, Sb2O5 and Ta2O5. The preparation method comprises a main slurry preparation step, an auxiliary slurry preparation step, a mixing step, a forming step, a glue discharging step and a sintering step which are carried out in sequence. The SnO2 piezoresistor has the following advantages: the capability of the SnO2 piezoresistor for discharging and amplifying current is improved, so the purpose of enhancing the nonlinear coefficient and the discharge current capacity of the SnO2 piezoresistor is achieved; and the residual voltage ratio is inhibited at the lowest level, and the SnO2 piezoresistor has a better effect and a higher aging stability than a Ta or Sb element monodoped piezoresistor.

Description

technical field

[0001] The invention relates to the field of electrical materials, in particular to a SnO material with high nonlinearity, low residual voltage and large flow capacity for power system transmission. 2 A varistor and a method of making the same. Background technique

[0002] The varistor is an electronic component whose conductivity changes with the change of the applied voltage. When the voltage applied across the varistor is greater than the varistor voltage of the varistor, the conductance of the varistor will increase infinitely. Large, the large current is released in a short period of time, thereby protecting the absolute safety of electrical equipment; and when the applied voltage is lower than the varistor voltage of the varistor, the varistor shows an infinitely small conductance at this time, which is quite in the disconnected state. This non-ohmic characteristic of the varistor is similar to two back-to-back Zener diodes, except that the varistor ...