Silicone Gel Insulation Performance Test Method

As an important electronic packaging material, the insulation performance of silicone gel directly affects the reliability and safety of electronic equipment.

1. Why do we need to test the insulation performance of silicone gel?

Silicone gel is widely used in:

High-voltage electronic component packaging

Insulation protection of power equipment

Moisture-proof sealing of precision instruments

In these applications, insulation performance is a key indicator to ensure the safe operation of equipment. Testing insulation performance can:

Verify material quality

Ensure compliance with industry standards

Prevent electrical failures

2. Main test items

Volume resistivity test

Measured using a high resistance meter

Test standard: ASTM D257

Typical value: 10^12-10^15Ω·cm

Surface resistivity test

Measure the surface resistance of the material

Influencing factors: cleanliness, humidity

Test method: parallel electrode method

Dielectric strength test

Measure the breakdown voltage

Test standard: IEC 60243

Unit: kV/mm

Dielectric constant and loss tangent

Use LCR tester

Key indicators for high-frequency applications

Test frequency: usually 1MHz

3. Test precautions

Sample preparation

Uniform thickness (usually 2mm)

Clean surface without pollution

Complete curing

Environmental control

Temperature 23±2℃

Relative humidity 50±5%

Sample constant temperature treatment before testing

Test equipment calibration

Calibrate test instruments regularly

Verify with standard samples

4. Common problem analysis

Unstable test results

Possible reasons:

Bubbles in the sample

Poor electrode contact

Ambient temperature and humidity fluctuations

Degraded insulation performance

Possible reasons:

Material formulation problems

Incomplete curing

Contaminants mixed in

5. Industry standard reference

International standards:

IEC 60684

ASTM D149

Domestic standards:

GB/T 1408

GB/T 1410

6. Key points of test report

A complete test report should include:

Test conditions

Test equipment information

Sample information

Test data

Result analysis

Correct insulation performance testing is an important part of ensuring the quality of silicone gel materials. It is recommended to conduct tests regularly and establish a complete quality file.