COBALT CARBIDE-BASED NANOPARTICLE PERMANENT MAGNET MATERIALS
申请公布号:WO2011032007(A1)
申请号:WO2010US48477
申请日期:2010.09.10
申请公布日期:2011.03.17
发明人:HARRIS, VINCENT, G.
分类号:B22F9/14;B22F1/02;B22F9/16
主分类号:B22F9/14
摘要:A composition of a crystalline ferromagnetic material based upon nanoscale cobalt carbide particles and to a method of manufacturing the ferromagnetic material of the invention via a polyol reaction are disclosed. The crystalline ferromagnetic cobalt carbide nanoparticles of the invention are useful for high performance permanent magnet applications. The processes according to the invention are extendable to other carbide phases, for example to Fe-, FeCo-carbides. Fe- and FeCo-carbides are realizable by using as precursor salts Fe-, Co-, and mixtures of Fe- and Co-salts, such as acetates, nitrates, chlorides, bromides, citrates, and sulfates, among others. The materials according to the invention include mixtures and/or admixtures of cobalt carbides, as both Co2C and Co3C phases. Mixtures may take the form of a collection of independent particles of Co2C and Co3C or as a collection of particles which consist of an intimate combination of Co2C and Co3C phases within individual particles. The relative proportions of these two phases as well as the morphology of each phase contribute to their attractive permanent magnet properties, particularly at low temperatures through room temperature and up to over 400 K.
OPTICAL RECORDING MEDIUM AND ITS MANUFACTURE
THERMAL HEAD COOLING DEVICE OF THERMAL PRINTER
FIBER-REINFORCED CERAMICS AND TOOL USING THE SAME
CUTTING/WELDING METHOD FOR METALLIC PLATE BY LASER BEAM
WELDING METHOD UTILIZING LASER BEAM FOR PLATES FOR ROLLING
SERIES PRODUCTION PLAN PREPARING METHOD
METHOD FOR ATTACHING AND DETACHING PELLICLE FROM MASK
BLANK WITH CHALCOGEN COMPOUND FILM AND FORMATION OF RUGGED PATTERN BY USING THIS BLANK
MECHANISM FOR PREVENTING DAMAGE TO MAGNETIC TAPE MEDIUM
INFORMATION PROCESSING EQUIPMENT
PRODUCTION OF THIN-FILM TRANSISTOR ARRAY
FORMATION METHOD FOR THICK-FILM PATTERN