The invention discloses a heat-conducting
silica gel sheet and a manufacturing method thereof. The heat-conducting
silica gel sheet is a sheet shaped body which is formed by mixing and mould-pressing the following components in parts by weight: 10-50 parts of polysiloxane, 20-600 parts of heat-conducting
powder, 0.1-5 parts of surface modifier, 0.2-2 parts of cross-linking agent, 0.01-1 part of
platinum catalyst and 0.0001-0.01 part of inhibitor. The manufacturing method of the heat-conducting
silica gel sheet comprises the following steps: a adding polysiloxane, heat-conducting
powder, the surface modifier, the cross-linking agent, the
platinum catalyst and the inhibitor to a reaction kettle in proportion in sequence, and stirring the components for 30-50 minutes to obtain
mixed materials; b filling the
mixed materials to a frame-shaped mould and flatting the upper surface of the frame-shaped mould; and c putting the mould with the
mixed materials to an oven, curing for 5-20 minutes at 80-150 DEG C, and forming to obtain the heat-conducting silica gel sheet with a predetermined thickness, wherein one surface of the heat-conducting silica gel sheet has
viscosity and the other surface of the heat-conducting sheet does not have
viscosity. According to the heat-conducting silica gel sheet and the manufacturing method thereof disclosed by the invention, the single-surface
viscosity characteristic of the heat-conducting silica gel sheet is achieved without a secondary process, and the process treatment uniformity is ensured by the one-step forming process.