MatMeas DMS-1000 High-Temperature Dielectric Impedance Spectrometer
Testing Function
Capacitance (Capacitance), also referred to as “electric capacity,” denotes the quantity of free charge stored under a given potential difference, represented by C. Charges move under the action of an electric field. When a dielectric medium exists between conductors, the movement of charges is impeded, causing charges to accumulate on the conductors, resulting in the storage and accumulation of electric charge. The amount of stored charge is defined as capacitance (Cp-D).
Testing Principle
Under a constant electric field or an alternating electric field of sufficiently low frequency, the relative permittivity of an isotropic or quasi-isotropic dielectric medium is equal to the ratio of the capacitance of the capacitor to the capacitance of the same electrode configuration in vacuum, where the space between the electrodes and the surrounding region of the electrodes is completely filled with the dielectric medium.
Under a steady-state sinusoidal electric field, the relative complex permittivity is expressed as a dielectric constant represented by the complex quantity ε, as shown in the figure below:
Testing Conditions
1. Test Parameter: Cp – D
2. Measurement Frequency Range: 100 – 30 MHz
3. Temperature Range: -159 – 450 °C, Room Temperature – 1000 °C, 800 – 1650 °C
Sample Requirements
1. Recommended Sample Dimensions: φ2–20 mm × t (1 – 10 mm)
2. The two major flat surfaces of the specimen shall be coated with a metallic layer to serve as electrodes (Xinlibo Technology provides electrode coating services).
Testing Standards
1. GB/T 11310-1989 Test Methods for Properties of Piezoelectric Ceramic Materials — Measurement of the Temperature Characteristics of Relative Free Permittivity
2. GB/T 31838.6-2021 Solid Insulating Materials — Dielectric and Electrical Properties — Part 6: Dielectric Properties (AC Methods): Relative Permittivity and Dielectric Loss Factor
Test Results
