摘要:
There are provided a permanent magnet and a manufacturing method thereof capable of densely sintering the entirety of the magnet without making a gap between a main phase and a grain boundary phase in the sintered magnet. To fine powder of milled neodymium magnet is added an organometallic compound solution containing an organometallic compound expressed with a structural formula of M-(OR)X (M represents V, Mo, Zr, Ta, Ti, W or Nb, R represents a substituent group consisting of a straight-chain or branched-chain hydrocarbon, X represents an arbitrary integer) so as to uniformly adhere the organometallic compound to particle surfaces of the neodymium magnet powder. Thereafter, a compact body formed through powder compaction is held for several hours in hydrogen atmosphere at 200 through 900 degrees Celsius. Thereafter, through sintering process, a permanent magnet is manufactured.
摘要:
There are provided a permanent magnet and a manufacturing method thereof that enables concentration of V, Mo, Zr, Ta, Ti, W or Nb contained in an organometallic compound in grain boundaries of the permanent magnet. To fine powder of milled neodymium magnet is added an organometallic compound solution containing an organometallic compound expressed with a structural formula of M-(OR)x (M represents V, Mo, Zr, Ta, Ti, W or Nb, R represents a substituent group consisting of a straight-chain or branched-chain hydrocarbon, x represents an arbitrary integer) so as to uniformly adhere the organometallic compound to particle surfaces of the neodymium magnet powder. Thereafter, a compact body obtained by compacting the magnet powder is held for several hours in hydrogen atmosphere at 200 through 900 degrees Celsius so as to perform a calcination process in hydrogen. Thereafter, through sintering, a permanent magnet is manufactured.
摘要:
There are provided a permanent magnet and a manufacturing method thereof capable of decreasing an activity level of a calcined body activated by a calcination process. To fine powder of milled neodymium magnet is added an organometallic compound solution containing an organometallic compound expressed with a structural formula of M-(OR)x (M represents V, Mo, Zr, Ta, Ti, W or Nb, R represents a substituent group consisting of a straight-chain or branched-chain hydrocarbon, x represents an arbitrary integer) so as to uniformly adhere the organometallic compound to particle surfaces of the neodymium magnet powder. Thereafter, desiccated magnet powder is held for several hours in hydrogen atmosphere at 200 through 900 degrees Celsius. Thereafter, the powdery calcined body calcined through the calcination process in hydrogen is held for several hours in vacuum atmosphere at 200 through 600 degrees Celsius for a dehydrogenation process.
摘要:
There are provided a pressure-sensitive adhesive composition containing stably dispersed metal-based fine particles, having further reinforced mechanical properties, and being capable of forming a pressure-sensitive adhesive layer with excellent refractive index and excellent adhesive strength, and a pressure-sensitive adhesive sheet produced therewith. A pressure-sensitive adhesive composition is prepared which includes as a monomer component 100 parts by weight of a (meth)acrylic polymer including 50% by weight or more of a (meth)acrylate represented by the formula CH2═C(R1)COOR2, wherein R1 represents hydrogen or a methyl group, and R2 represents a substituted or unsubstituted alkyl group of 1 to 20 carbon atoms, having a weight average molecular weight of 500,000 to 3,000,000 as determined by gel permeation chromatography, and being substantially free of an acid component; 5 to 100 parts by weight of a low-molecular-weight aromatic polymer having a weight average molecular weight of 500 to 4,000 as determined by gel permeation chromatography; and 5 to 100 parts by weight of metal-based fine particles having an average particle size of 5 to 100 nm.
摘要:
Provided are a spiral type membrane element that can re-collect the electric power that is used in a good manner, and a spiral type membrane filtering device having the same. The spiral type membrane element comprises a power generating section that generates electric power by using a liquid, and an electric power outputting section that outputs, either in a wired manner or in a wireless manner, the electric power supplied from said power generating section. The electric power that is generated in the power generating section using the liquid (raw water, permeated water, or concentrated water) can be output from the electric power outputting section in a wired manner or in a wireless manner. Therefore, the electric power that is output from the aforesaid electric power outputting section can be used in an electric component disposed outside or can be stored into a capacitor section disposed outside.
摘要:
A composition for an optical waveguide is provided which contains no halogen atom and has no light absorption band in a visible to near-infrared spectral range. A method of preparing the composition is also provided. The composition includes: (A) a fine particulate zirconium oxide material including zirconium oxide fine particles, and a silicone oligomer and a silicone oligomer polymer bonded to outer peripheral surfaces of the zirconium oxide fine particles; and (B) a photoacid generator. For preparation of the composition, the fine particulate zirconium oxide material (A) is prepared by mixing a silicone oligomer in an aqueous dispersion of zirconium oxide fine particles, polymerizing the silicone oligomer in an acidic pH range to provide a silicone oligomer polymer, and bonding the silicone oligomer and the silicone oligomer polymer to outer peripheral surfaces of the zirconium oxide fine particles. Then, the photoacid generator (B) is blended with the fine particulate zirconium oxide material (A).
摘要:
There are provided a permanent magnet and a manufacturing method thereof enabling carbon content contained in magnet particles to be reduced in advance before sintering even when wet milling is employed. Coarsely-milled magnet powder is further milled by a bead mill in a solvent together with an organometallic compound expressed with a structural formula of M-(OR)X (M represents V, Mo, Zr, Ta Ti W or Nb, R represents a substituent group consisting of a straight-chain or branched-chain hydrocarbon, X represents an arbitrary integer) so as to uniformly adhere the organometallic compound to particle surfaces of the magnet powder. Thereafter, a compact body of compacted magnet powder is held for several hours in hydrogen atmosphere at 200 through 900 degrees Celsius to perform hydrogen calcination process. Thereafter, through sintering process, a permanent magnet 1 is formed.
摘要翻译:提供永磁体及其制造方法,即使在使用湿磨时也能预先在烧结前减少磁体颗粒中含有的碳含量。 粗粉碎的磁粉通过珠磨机在溶剂中与结构式为M-(OR)X(M表示V,Mo,Zr,Ta Ti W或Nb表示的有机金属化合物)进一步研磨,R表示 由直链或支链烃构成的取代基,X表示任意的整数),以使有机金属化合物均匀地附着在磁铁粉末的粒子表面。 之后,在200〜900摄氏度的氢气氛中,将紧凑的致密体磁体保持数小时,进行氢煅烧。 此后,通过烧结处理,形成永磁体1。
摘要:
The present invention relates to an acrylic pressure-sensitive adhesive resin composition including an organic-inorganic hybrid polymer synthesized from the following (a) to (d): (a) fine silica particles having silanol groups on a surface thereof; (b) a siloxane having at least one selected from a group consisting of an alkoxysilyl group and a silanol group at a molecular end thereof; (c) a trialkoxysilane represented by the following general formula (I) in which R1 represents a C1-6 alkyl group, and R1′ represents a hydrogen atom or a methyl group; and (d) a (meth)acrylic monomer:
摘要:
Provided are a spiral type membrane element that can re-collect the electric power that is used in a good manner, and a spiral type membrane filtering device having the same. The spiral type membrane element comprises a power generating section that generates electric power by using a liquid, and an electric power outputting section that outputs, either in a wired manner or in a wireless manner, the electric power supplied from said power generating section. The electric power that is generated in the power generating section using the liquid (raw water, permeated water, or concentrated water) can be output from the electric power outputting section in a wired manner or in a wireless manner. Therefore, the electric power that is output from the aforesaid electric power outputting section can be used in an electric component disposed outside or can be stored into a capacitor section disposed outside.
摘要:
A silicone resin composition containing (i) a silicone resin and (ii) fine metal oxide particles without having a reactive functional group or with a protected reactive functional group on the surface thereof (fine metal oxide particles B), wherein the silicone resin is obtained by carrying out a polymerization reaction between a silicone derivative having an alkoxysilyl group at an end of a molecule and a molecular weight of from 200 to 3000, and fine metal oxide particles having a reactive functional group on the surface thereof (fine metal oxide particles A), and wherein the fine metal oxide particles B are dispersed in the silicone resin (Embodiment 1); a silicone resin.