1. ECH600 probe cold and hot table

2. Temperature controller

3. Refrigeration controller

4. Circulating water machine

5. Signal switcher

6. Liquid nitrogen tank

7. Upper computer

8.Keysight E4990A

Using the parallel plate capacitance method, place the sample on a precisely temperature controlled sample stage with ceramic silver plates placed on it. One probe contacts the upper electrode of the sample, while the other probe contacts the silver layer of the ceramic silver plate, thereby conducting with the lower electrode of the sample and measuring the sample capacitance. Before testing, it is necessary to measure the sample size and input it into the software, so that the dielectric constant of the sample can be automatically calculated at different temperatures.

Ceramic disc A-BT

TCC has good repeatability and small differences in curves between different rounds;

The initial measurement, temperature recovery, and second measurement trends of Dk and Df are consistent, with small differences in data;

Ceramic disc B-BT

TCC has good repeatability, and the differences in curves between different testing epochs are relatively small;

The trend of Dk changes is consistent;

MLCC products

TCC has been tested multiple times with good agreement, with a variation rate within ± 15%;

The Cp test paper ranges from 0.085 μ F to 0.115 μ F, and the difference between the second and first measurements at the same temperature is within 7%;

The performance under 0.5V test conditions is consistent with the nominal value.

The test results of ceramic discs and MLCC products meet the requirements, and the TCC, Dk, Df test results are consistent with the measured data.

2. The temperature control accuracy is within ± 0.1 ℃. At a heating rate of 3 ℃/min, the actual sampling temperature difference of four frequencies at the same temperature is less than 0.2 ℃, and the adjacent temperature difference of the same category is ≤ 0.2 ℃, which is consistent with the single standard value of the configuration. The temperature control and temperature detection are accurate.

▲ Paired with TH2838 from Tonghui