Application Cases

Experimental Name: Electrical Performance Testing of Polymer Films

Experimental Content: Electrical performance includes dielectric spectrum characteristics, breakdown characteristics, and ferroelectric hysteresis loops.

Test Equipment: High-voltage amplifier, impedance analyzer, hysteresis loop measuring instrument, ferroelectric tester, etc.

Figure 1: Schematic Diagram of Polymer Breakdown Electric Field Strength Test

Experimental Process:

(1) Dielectric Spectrum Characteristics: The dielectric spectrum characteristics of polymer films reflect the variation of capacitance with electric field frequency under AC electric fields. This paper uses a 4294A impedance analyzer to test the dielectric spectrum.

(2) Breakdown Characteristics: Due to the non-ideal characteristics of polymers, when a certain voltage is applied to the polymer, carriers in the solid dielectric undergo directional movement, forming a weak conduction current. However, when the applied voltage exceeds a certain critical value, the conduction current in the dielectric increases sharply, causing the dielectric to lose its insulating properties and become conductive. This phenomenon is known as dielectric breakdown.

(3) Hysteresis Loop Measurement: To obtain the relationship between the electric displacement vector and the electric field strength during the charging and discharging processes of polymer films, a hysteresis loop measuring instrument is typically used to measure the charge-discharge curves of polymer materials. This provides information on the material's energy storage characteristics, such as polarization strength, charge-discharge efficiency, charging energy density, and discharging energy density.

(4) Insulation Resistivity: Since dielectric materials are not perfect insulators, leakage conduction currents are commonly present in samples. A larger leakage current indicates poorer insulation properties of the material, which also means greater losses under high-voltage conditions.

Experimental Results:

This section describes the characterization methods used for the polymer films in this paper and briefly introduces the electrical performance testing methods for polymer dielectric films, while also establishing an experimental system for electric field strength testing.

High-Voltage Amplifier Recommendation: ATA-7100 High-Voltage Amplifier

Figure: ATA-7100 High-Voltage Amplifier Specifications and Parameters