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Method for lossless detection on performance evaluation of ZnO piezoresistor

A varistor, non-destructive testing technology, applied in the direction of measuring resistance/reactance/impedance, measuring device, measuring electrical variables, etc., can solve problems such as evaluation that affect the performance

Inactive Publication Date: 2011-06-22
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the parameters that characterize the dielectric properties of ZnO varistors or the complex plane are improperly selected, it will affect the evaluation of its performance.

Method used

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  • Method for lossless detection on performance evaluation of ZnO piezoresistor
  • Method for lossless detection on performance evaluation of ZnO piezoresistor
  • Method for lossless detection on performance evaluation of ZnO piezoresistor

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Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0031] First, the small current test results of four different samples are given in Table 1, including the potential gradient E 1mA and nonlinear coefficient α.

[0032] Table 1

[0033]

[0034] Referring to Figure 1, Figure 2, Figure 3 and Figure 4, the relaxation peaks appearing in each figure are named after the corresponding peak1, peak2, peak3 and peak4, and the activation energy corresponding to each relaxation peak is calculated by the Arrhenius formula and They are summarized in Table 2 below.

[0035] Table 2 shows the performance of the relaxation process of different ZnO varistors in different planes. Among them, Peak1 and Peak2 are the loss of the ZnO varistor and the relaxation peak corresponding to the modulus M” in the low temperature region. For different samples, their activation energies are almost the same, and they respectively correspond to the intrinsic properties of the ZnO varistor. and Peak3 can only be observed when the preparation and performa...

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PUM

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Abstract

The invention discloses a method for lossless detection on performance evaluation of ZnO piezoresistor. The performance of the ZnO piezoresistor is evaluated through testing the low current characteristics, the nonlinear coefficient and the electric potential gradient of the ZnO piezoresistor. The invention is the method for measuring the dielectrical properties of the ZnO piezoresistor by utilizing dielectric spectra; and the superiority or the inferiority of the performance of the ZnO piezoresistor is evaluated from the dielectric losses and the viewpoint of the activation energy of microstructural defects. The method provided by the invention is the measurement without damage, not only can be used for evaluating the superiority or the inferiority of the performance of the ZnO piezoresistor, but also has certain guide significance in the optimization of the process of formulation and manufacture of the ZnO piezoresistor.

Description

technical field [0001] The invention relates to a non-destructive detection method for evaluating the performance of ZnO resistance, in particular to an evaluation method combined with the relaxation process of the dielectric spectrum of ZnO varistor. Background technique [0002] A common method to evaluate the performance of ZnO varistors is to measure their small current characteristics, nonlinear characteristics, and potential gradients, but even if the electrical properties of ZnO varistors such as small current characteristics, potential gradients, and nonlinear coefficients meet product requirements However, this kind of ZnO varistor may not be able to be used well, and it often causes explosions, fires, etc. due to the impact of large currents or excessive heat generation during flow. Therefore, better testing methods are needed to characterize the performance of ZnO varistors. [0003] At present, the research on the dielectric spectrum test of ZnO varistors is mai...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R27/02G01R27/26
Inventor 李建英赵学童李盛涛
Owner XI AN JIAOTONG UNIV