Pyroelectric tester is a precision instrument used to measure the pyroelectric properties of materials. The pyroelectric effect refers to the phenomenon where the surface charge distribution of certain materials changes with temperature, resulting in a potential difference. The pyroelectric coefficient is an important parameter for measuring the pyroelectric performance of materials, which is of great significance for the research and application of pyroelectric materials.
The pyroelectric tester operates based on the pyroelectric effect. The tester accurately controls the temperature and electric field conditions of the sample, uses high-sensitivity sensors to collect these electrical signals in real time, and after signal amplification, filtering, and digital processing, obtains the pyroelectric coefficient data of the sample.
A pyroelectric tester typically consists of a temperature control system, an electric field application system, a signal acquisition and processing system, and other components. By accurately controlling the temperature and electric field conditions of the sample, the pyroelectric properties of the material can be tested. The specific testing methods include:
Charge integration method: By measuring the accumulated pyroelectric charge on a capacitor, the variation of residual polarization with temperature is determined.
Thermoelectric dynamic current method: composed of a temperature controller, heating furnace body, microcurrent amplifier, temperature tester, and computer software system, it controls the internal temperature of the heating furnace body. The current signal of the sample is input to the computer through the microcurrent amplifier, and the temperature signal is transmitted to the computer through the temperature tester.
The pyroelectric tester is designed based on the pyroelectric effect, and its core principle is to calculate the pyroelectric coefficient by measuring the changes in surface charge distribution of materials during temperature changes. The specific process is as follows:
Temperature control: The tester accurately adjusts the internal temperature of the heating furnace through a temperature controller to keep the sample in a stable temperature environment.
Current and temperature signal acquisition: The weak pyroelectric current signal generated by the sample during temperature changes is amplified by a microcurrent amplifier and input into the computer; The temperature signal is directly transmitted to the computer through the temperature tester.
Signal processing and analysis: The computer software system processes the collected current and temperature signals in real time, analyzes the curve of the pyroelectric coefficient changing with temperature and time, and generates the pyroelectric spectrum of the sample.