Application Cases

Experiment Name: Polarization Testing of Ferroelectric Materials

Experimental Principle: Ferroelectric materials refer to crystalline materials with spontaneous polarization, exhibiting a series of unique electrical and physical properties. Ferroelectric testing is one of the key experimental methods for studying the properties of ferroelectric materials. With the continuous emergence of new ferroelectric materials, correctly obtaining the hysteresis loops and ferroelectric parameters of materials has become an increasingly important concern. One of the most distinctive features of ferroelectric materials is their ability to alter their spontaneous polarization state through the application of an electric field. To conduct polarization experiments on ferroelectric materials, a high-voltage amplifier is required to provide a sufficiently strong electric field. The high-voltage amplifier can amplify low-voltage signals to the desired high voltage, ensuring adequate voltage is applied to the sample.

Experimental Block Diagram:

Photograph of the Experimental System:

Experimental Procedure:

The host computer controls the ferroelectric analyzer via the system controller to generate an analog excitation signal, which is then amplified by the ATA-67100 high-voltage amplifier and output to both ends of the test sample to produce a sufficiently strong electric field. By utilizing the voltage signal output by the high-voltage amplifier, the strength and direction of the electric field applied in the test system can be controlled, thereby obtaining the hysteresis loop of the ferroelectric material. Analysis of the hysteresis loop allows for the determination of parameters such as the coercive field strength and remanent polarization intensity, aiding in the study of the material's ferroelectric properties and phase transition behavior. When the voltage signal output by the high-voltage amplifier is applied to the ferroelectric material, the polarization intensity within the material changes, altering parameters such as the dielectric constant and electrical conductivity. This testing method helps in studying the polarization mechanisms and performance of ferroelectric materials. Additionally, a microscope can be used to explore the optical properties of ferroelectric materials.

Recommended Power Amplifier: ATA-7000 Series High-Voltage Amplifier

Figure: Specifications of the ATA-7000 Series High-Voltage Amplifier

The ATA-7000 Series is an ideal high-voltage amplifier capable of amplifying both AC and DC signals. It provides a single-ended output of 40 kVp-p (±20 kVp) high voltage and can drive high-voltage loads. The voltage gain is digitally adjustable, and frequently used settings can be saved with a single click, offering convenient and straightforward operation.

Performance of the Amplifier: The experiment requires a voltage of 8 kV. The high-voltage amplifier ensures that the signal output by the ferroelectric analyzer is amplified to kilovolt levels without distortion. It also controls the strength and direction of the electric field applied in the test system, enabling the acquisition of the hysteresis loop of the ferroelectric material.

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