Method of preparing thermally conductive compounds by liquid metal bridged particle clusters
First Claim
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1. A method of preparing thermally conductive mechanically compliant pads comprising the steps of:
- (a) preparing a mixture of;
(1) a quantity of a gallium and/or indium containing alloy which is in liquid state temperatures below 120°
C.;
(2) a thermally conductive particulate solid consisting essentially of boron nitride;
(b) mechanically blending said mixture to cause the surfaces of said particulate to become wetted with said liquid alloy to form a homogeneous paste wherein said liquid alloy encapsulates individual of said boron nitride particles;
(c) combining said paste with a quantity of a flowable plastic resin material consisting essentially of a blend of silicone oil with octyl-triethoxysilane to form a thermally conductive mass with said thermally conductive mass comprising from between about 10% and 90% by volume of metal coated particulate, balance flowable plastic resin.
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Abstract
A thermally conductive mechanically compliant pad of high stability including a quantity of gallium and/or indium alloy liquid at temperatures below about 120° C. and a boron nitride particulate solid blended into the liquid metal alloy to form a paste. The paste is then combined with a quantity of a flowable plastic resin consisting of a blend of silicone oil and octyl-ethoxysilane to form the mechanically compliant pad, the compliant pad comprising from between about 10% and 90% of metallic coated particulate, balance flowable plastic resin blend.
58 Citations
6 Claims
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1. A method of preparing thermally conductive mechanically compliant pads comprising the steps of:
-
(a) preparing a mixture of;
(1) a quantity of a gallium and/or indium containing alloy which is in liquid state temperatures below 120°
C.;
(2) a thermally conductive particulate solid consisting essentially of boron nitride;
(b) mechanically blending said mixture to cause the surfaces of said particulate to become wetted with said liquid alloy to form a homogeneous paste wherein said liquid alloy encapsulates individual of said boron nitride particles;
(c) combining said paste with a quantity of a flowable plastic resin material consisting essentially of a blend of silicone oil with octyl-triethoxysilane to form a thermally conductive mass with said thermally conductive mass comprising from between about 10% and 90% by volume of metal coated particulate, balance flowable plastic resin. - View Dependent Claims (2, 3, 4, 5)
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6. The method of preparing thermally conductive mechanically compliant pads comprising the steps of:
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(a) preparing a mixture of;
(1) a liquid metal alloy with a component selected from the group consisting of gallium and indium, and being in the liquid state at temperatures below 120°
C.; and
(2) a thermally conductive particulate solid selected from the group consisting of boron nitride, aluminum nitride, and alumina;
(b) mechanically blending said mixture to cause the surfaces of said particulate to become wetted with said liquid alloy to form a homogeneous paste wherein said liquid alloy encapsulates individual of said particles comprising said particulate;
(c) combining said paste with a quantity of a flowable plastic resin material consisting essentially of a blend of silicone oil with a hydrophobic surface treatment, e.g. alkyl functional silanes or titanates, to form a thermally conductive mass with said thermally conductive mass comprising from between about 10% and 90% by volume of metal coated particulate, balance flowable plastic resin blend.
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Specification