Device and method for simultaneously measuring dielectric and pyroelectric properties of pyroelectric material in bias field

Abstract

The invention discloses a device and a method for simultaneously measuring dielectric and pyroelectric properties of a pyroelectric material in a bias field. The device comprises an LCR electric bridge (1), a coupling transformer (2), a direct-current voltage source (3), a resistor (4), a capacitor (5), a sample (6), a temperature cavity (7), a temperature measuring set (8), a sampling resistor (9) for measuring pyroelectric signals, a filter capacitor (10), a voltmeter (11), a voltage dependent resistor (12), a current limiting resistor (13) and a diode (14). In a measurement circuit for implementing dielectric properties in the bias field, a circuit for measuring pyroelectric coefficients in the bias field is introduced in a serial connection manner; and the device and the method for simultaneously measuring the dielectric and the pyroelectric properties of the pyroelectric material in the bias field, which is simple and feasible, is adopted. The device has the greatest advantages that the structure is simple, the data processing is easy and convenient, and relation of dielectric constants, dielectric losses and pyroelectric coefficients of the material in the bias field change with temperature can be simultaneously measured.

Description

technical field [0001] The invention relates to the measurement of electrical performance parameters of pyroelectric materials, in particular to a device and method for synchronously measuring the dielectric pyroelectric performance of pyroelectric materials under a bias electric field. Background technique [0002] Pyroelectric materials absorb infrared radiation and convert infrared signals into electrical information to realize infrared detection. Its performance directly determines the performance of the uncooled infrared focal plane. The infrared detection performance of the pyroelectric material working under the bias field has obvious advantages over the intrinsic pyroelectric material under the zero bias field. In recent years, the uncooled infrared focal plane technology in the world has mostly used pyroelectric materials working under partial fields as sensitive elements for infrared detection. Pyroelectric materials are usually expressed by the ratio of pyroelect...

AI Technical Summary

Problems solved by technology

At present, most of the existing test methods test the dielectric properties (ε and tanδ) and the pyroelectric coefficient (p) separately, and then use the measured ε, tanδ, and p to calculate the figure of merit. There is no simultaneous measurement of thermal conductivity. Device and method for dielectric pyroelectric performance of discharge material under bias field

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