Magnesium oxide powder, production method therefor, thermally-conductive resin composition, thermally-conductive grease, and thermally-conductive coating material

• Main Authors: ARASE TAKASHI, NAKAMURA KOJI, NISHIDA NAOTO
• Format: Patent
• Language: Chinese; English
• Published: 31.03.2020
• Subjects: ADHESIVES; CASTING; CHEMISTRY; COMPOSITIONS BASED THEREON; COMPOSITIONS OF MACROMOLECULAR COMPOUNDS; COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS; DYES; INORGANIC CHEMISTRY; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FORELSEWHERE; METALLURGY; MISCELLANEOUS APPLICATIONS OF MATERIALS; MISCELLANEOUS COMPOSITIONS; NATURAL RESINS; ORGANIC MACROMOLECULAR COMPOUNDS; PAINTS; PERFORMING OPERATIONS; POLISHES; POWDER METALLURGY; THEIR PREPARATION OR CHEMICAL WORKING-UP; TRANSPORTING; USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS; WORKING METALLIC POWDER

This magnesium oxide powder is characterized in that: the median diameter (D50) thereof is 5-100 [mu]m; the MgO purity thereof is 98 mass% or more; the Ca compound content thereof is 2 mass% or less in terms of CaO; and when the powder is immersed in pure water and is left at rest at 95 DEG C for 24 hours, the mass ratio Ca/Mg of calcium ions to magnesium ions in the water solution is 10 or less. 一种氧化镁粉末，其特征在于，中值粒径(D)为5μm～100μm，MgO的纯度为98质量％以上，Ca化合物的含量以CaO换算计为2质量％以下，将其浸渍于纯水中并于95℃静置24小时时，水溶液中的镁离子与钙离子的质量比Ca/Mg为10以下。