Making thermally conductive particles

• Main Authors: SAGA YUJI, NOMA YURI
• Format: Patent
• Language: Chinese; English
• Published: 22.06.2016
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING

Methods of making thermally conductive particles include mixing in a solvent carbon particles, a cationic surfactant or an amphoteric surfactant, a hydrolysis catalyst, and a silica precursor to result in mixed solution containing silica-coated carbon particles having volume resistivity of 1*106 Omega-cm or more. Compositions comprising these particles and a polymeric medium, which, when molded, exhibit a combined property of thermal conductivity of at least 1 W/mK, and volume resistivity of at least 1*108 Omega-cm. 本发明公开了制备导热颗粒的方法，该方法包括在溶剂中将碳颗粒、阳离子表面活性剂或两性表面活性剂、水解催化剂、和二氧化硅前体混合以产生包含二氧化硅涂覆的碳颗粒的混合溶液，所述二氧化硅涂覆的碳颗粒具有1×10Ω-cm或更大的体积电阻率。本发明公开了包含这些颗粒和聚合物介质的组合物，该组合物在模塑时表现出至少1W/mK的热导率和至少1×10Ω-cm的体积电阻率的组合特性。