MAGNESIUM OXIDE FOR ANNEALING SEPARATION AGENT AND DIRECTIONAL ELECTROMAGNETIC STEEL SHEET

• Main Authors: HIRATSU YUTAKA, KAMEI TADASUKE, UDA TSUBASA
• Format: Patent
• Language: English; Japanese
• Published: 05.10.2017
• Subjects: BASIC ELECTRIC ELEMENTS; CHEMICAL SURFACE TREATMENT; CHEMISTRY; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATIONOR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY IONIMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; COATING MATERIAL WITH METALLIC MATERIAL; COATING METALLIC MATERIAL; COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM,CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THERARE-EARTH METALS; DIFFUSION TREATMENT OF METALLIC MATERIAL; ELECTRICITY; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUSMETALS OR ALLOYS; INDUCTANCES; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION INGENERAL; INORGANIC CHEMISTRY; MAGNETS; MAKING METAL MALLEABLE BY DECARBURISATION, TEMPERING OR OTHERTREATMENTS; METALLURGY; METALLURGY OF IRON; MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THESURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; TRANSFORMERS

PROBLEM TO BE SOLVED: To provide magnesium oxide for annealing separation agent for providing a directional electromagnetic steel sheet excellent in magnetic property and insulation property.SOLUTION: There is provided magnesium oxide for annealing separation agent having sulfur content of 0.1 to 0.5 mass% and aggregation R/Rwhich is a ratio of particle diameter Rcalculated from Blaine specific surface to particle diameter Rcalculated from BET specific surface area of 3.0 to 5.5.SELECTED DRAWING: None 【課題】 磁気特性及び絶縁特性に優れた方向性電磁鋼板を得るための焼鈍分離剤用酸化マグネシウムを提供する。【解決手段】 硫黄含有量が０．１〜０．５質量％、及びブレーン比表面積から算出される粒子径ＲBlaineのＢＥＴ比表面積から算出される粒子径ＲBETに対する比である凝集度ＲBlaine／ＲBETが３．０〜５．５である焼鈍分離剤用酸化マグネシウムである。【選択図】 なし