| 摘要 |
PURPOSE:To obtain the title material excellent in moldability, abrasion resistance and thermal conductivity, by using alpha-alumina with a specially treated surface layer as a filler. CONSTITUTION:alpha-Alumina is instantaneously fused in a special flame fusing furnace to obtain slightly round specially treated alpha-alumina (B) whose surface layer is has been modified into gamma-alumina. An epoxy resin (A) of, e.g., a bisphenol type is mixed with component B as a filler, an amine, a phenol novolak or the like (C) as a curing agent and, optionally, a cure accelerator, a mold release, or the like (D), and the mixture is kneaded with, e.g., a hot roll at, e.g., 100 deg.C.
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