Testing clamp of temperature varying ferroelectric hysteresis loop of material under high electric field and testing method thereof

Abstract

The invention relates to a testing clamp of a temperature varying ferroelectric hysteresis loop of a material under a high electric field and a testing method thereof. The testing clamp comprises a temperature varying thermostat, a sample groove, a metal conducting layer and a vacuum cavity; the sample groove is formed in the temperature varying thermostat and accommodates a liquid insulating medium, and a ceramic sample prepared with an upper electrode and a lower electrode is immersed in the liquid insulating medium; the metal conducting layer is located below the ceramic sample in the sample groove and immersed in the liquid insulating medium; the vacuum cavity accommodates the temperature varying thermostat and the sample groove and is provided with a first high-voltage port and a second high-voltage port; the output end of the first high-voltage port is connected to the upper electrode, and the input end of the first high-voltage port is connected to the high-voltage end of a ferroelectric hysteresis loop measuring instrument; the input end of the second high-voltage port is connected to the leading-out end of the metal conducting layer, and the output end of the second high-voltage port is connected to the current testing end of the ferroelectric hysteresis loop measuring instrument. According to the testing clamp of the temperature varying ferroelectric hysteresis loop of the material under the high electric field and the testing method thereof, not only can ferroelectric hysteresis loop measuring when a nonlinear medium material loads the high electric field be implemented by exerting the high electric field, but also temperature varying measuring can be implemented while the high electric field is exerted.

Description

technical field [0001] The invention belongs to the technical field of testing electrical performance parameters of dielectric materials, and in particular relates to the testing of hysteresis loops of dielectric materials, in particular to a fixture and a testing method for variable temperature hysteresis loops of nonlinear dielectric materials under high electric fields. Background technique [0002] With the continuous development of nuclear physics technology, electron beam, accelerator, laser fusion, etc., pulse power technology has been widely used in national defense, high-tech, civil and other fields, among which energy storage system is an important part of pulse power devices. Capacitors have the advantages of fast energy release, large output power, flexible combination, mature technology, and low price, and are currently the most widely used energy storage components. The dielectric materials used as pulse capacitors are divided into two types: linear dielectrics...

AI Technical Summary

Problems solved by technology

[0005] Using the method specified in the GB / T 6426-1999 standard to test the hysteresis loop test of the material under high electric field, the sample will have edge breakdown and cannot apply a high electric field of tens of kV / mm

For variable temperature, especially low-temperature hysteresis loop measurement, because low-temperature samples are prone to moisture absorption, frost formation, and increased leakage current, it becomes more difficult to apply a high electric field. Currently, there are no low-temperature and high-voltage test fixtures and test methods available.

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