How to test whether the heat-free silicon gum is high temperature, a specific method

The thermally conductive silica gel sheet is often used in the thermal heat dissipation application of the electron product, which has good thermal conductivity, which can maintain good stability in the case of high temperature, acid and alkali, etc., high low temperature, temperature range -50 to 200 ° C; then, how do I test whether the heat-free silicon melt is really high temperature resistant characteristics? Commonly used test thermal silica gums are high temperature-temperature methods for simply aging tests. The important goal of this test is how to see the degree of volatilization of the heat-conducting silicon film at high temperature silicon molecules. The specific method is as follows: 1. Select 10 samples, place 80--100h at 35 ° C drying box 2, put the sample in an oven 200 ° C continuously dry 200h 3. Take out the sample to put on a dry box of 35 ° C 80-100h 4, accurately weigh 10 sample weight g1, respectively 5, once again accurately weigh 10 sample weight g2 6, on a weight loss: (G1-G2) / g1 × 100% Judgments based: 1, weight loss is less than 1%; 2, all chemical physical properties are stable after high temperature. Through the above test steps, it can be judged that a heat-conducting silicon film is high temperature resistant characteristics, and provides more reference for choosing a suitable heat-free silicon film. FQJ, read full text

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