MAGNESIUM OXIDE POWDER, MANUFACTURING METHOD THEREFOR, HEAT CONDUCTIVE RESIN COMPOSITION, HEAT CONDUCTIVE GREASE, AND HEAT CONDUCTIVE COATING

• Main Authors: ARASE TAKASHI, NAKAMURA KOJI, NISHIDA NAOTO
• Format: Patent
• Language: English; Japanese
• Published: 24.06.2019
• 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

To provide a magnesium oxide powder of which water resistance and acid resistance are improved without adding a treatment by other materials to magnesium oxide, a manufacturing method therefor, a heat conductive resin composition, a heat conductive grease, and a heat conductive coating.SOLUTION: There is provided a magnesium oxide powder having median diameter (D) of 5 to 100 μm, purity of MgO of 98 mass% or more, content of a Ca compound of 2 mass% or less in terms of CaO, and a mass ratio between a magnesium ion and a calcium ion in a solution when impregnated into a pure water and stood at 95°C for 24 hr. of 10 or less.SELECTED DRAWING: None 【課題】酸化マグネシウムに他の物質による処理を加えることなく、耐水性及び耐酸性を向上させた酸化マグネシウム粉末、その製造方法、熱伝導性樹脂組成物、熱伝導性グリス、及び熱伝導性塗料を提供する。【解決手段】メジアン径（Ｄ５０）が５〜１００μｍ、ＭｇＯの純度が９８質量％以上、Ｃａ化合物の含有量がＣａＯ換算で２質量％以下であり、純水に浸漬し、９５℃で２４時間静置した時に、水溶液中のマグネシウムイオンとカルシウムイオンとの質量比Ｃａ／Ｍｇが１０以下であることを特徴とする酸化マグネシウム粉末である。【選択図】なし