Insulative potting composite material with high thermal conductivity and preparation method thereof
A composite material and high thermal conductivity technology, which is applied in the field of high thermal conductivity insulating potting composite materials and their preparation, can solve the problems of inability to meet the heat dissipation requirements of high-power electronic components, and achieve the effects of easy bubble removal, no sedimentation, and convenient operation.
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Embodiment 1
[0023] Weigh 100 parts of vinyl silicone oil and 6 parts of chloroplatinic acid catalyst in parts by mass, put them in a double planetary mixer and mix for 10 min. Slowly add filler in batches: 200 parts of 5μm spherical Al 2 o 3 , 200 parts of columnar AlN with a diameter of 0.5 μm (aspect ratio of 10), and 100 parts of acicular SiC whiskers with a diameter of 0.1 μm (aspect ratio of 50), were mixed for 60 min to prepare component A. Weigh 100 parts of vinyl silicone oil and 6 parts of hydrogen-containing silicone oil, and mix them in a double planetary mixer for 10 minutes. Slowly add the dried filler in batches: 200 parts of 5 μm spherical Al 2 o 3 , 200 parts of columnar AlN with a diameter of 0.5 μm (aspect ratio of 10), and 100 parts of acicular SiC whiskers with a diameter of 0.1 μm (aspect ratio of 50), were mixed for 60 min to prepare component B. Mix component A and component B uniformly at a mass ratio of 1:1. The resulting mixture has a viscosity of 28,000 mPa·...
Embodiment 2
[0025] Weigh 100 parts of vinyl silicone oil and 6 parts of chloroplatinic acid catalyst in parts by mass, put them in a double planetary mixer and mix for 10 min. Slowly add filler in batches: 200 parts of 5μm spherical Al 2 o 3 , 200 parts of columnar AlN with a diameter of 0.5 μm (aspect ratio of 10), and 100 parts of flaky BN with a diameter of 10 μm were mixed for 60 min to prepare component A. Weigh 100 parts of vinyl silicone oil and 6 parts of hydrogen-containing silicone oil, and mix them in a double planetary mixer for 10 minutes. Slowly add the dried filler in batches: 200 parts of 5 μm spherical Al 2 o 3 , 200 parts of columnar AlN with a diameter of 0.5 μm (aspect ratio of 10), and 100 parts of flaky BN with a diameter of 10 μm were mixed for 60 min to prepare component B. Mix component A and component B uniformly at a mass ratio of 1:1. The resulting mixture has a viscosity of 25,000 mPa·s, and is cured at 120°C for 40 minutes. The thermal conductivity of th...
Embodiment 3
[0027] Weigh 100 parts of vinyl silicone oil and 6 parts of chloroplatinic acid catalyst in parts by mass, put them in a double planetary mixer and mix for 10 min. Slowly add filler in batches: 300 parts of 5μm spherical Al 2 o 3 , 200 parts of columnar AlN with a diameter of 0.5 μm (aspect ratio of 10), 50 parts of flaky BN with a diameter of 10 μm, and 50 parts of needle-shaped SiC whiskers with a diameter of 0.1 μm (aspect ratio of 50), mixed for 60 minutes to prepare Group A point. Weigh 100 parts of vinyl silicone oil and 6 parts of hydrogen-containing silicone oil, and mix them in a double planetary mixer for 10 minutes. Slowly add the dried filler in batches: 300 parts of 5 μm spherical Al 2 o 3 , 200 parts of columnar AlN with a diameter of 0.5 μm (aspect ratio of 10), 50 parts of flaky BN with a diameter of 10 μm, and 50 parts of needle-shaped SiC whiskers with a diameter of 0.1 μm (aspect ratio of 50), mixed for 60 minutes to obtain group B point. Mix component...
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