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    • 3. 发明专利
    • Titanium alloy
    • 钛合金
    • JP2010189735A
    • 2010-09-02
    • JP2009036987
    • 2009-02-19
    • Toyota Central R&D Labs IncToyota Motor CorpUniv Of Tsukubaトヨタ自動車株式会社国立大学法人 筑波大学株式会社豊田中央研究所
    • SHOJI TETSUYANAKAMURA NAOKIKURAMOTO SHIGERUMIYAZAKI SHUICHIKIN KIEI
    • C22C14/00B21B3/00C22F1/00C22F1/18
    • PROBLEM TO BE SOLVED: To provide a titanium alloy whose work hardening is suppressed so as to obtain stable, high workability while maintaining its high strength.
      SOLUTION: The titanium alloy has a chemical composition at least comprising Nb and O among Nb, Zr, Ta and O, and in which Nb equivalent defined by formula (1): Nb equivalent(at%)=Nb content(at%)+0.875×Zr content(at%)+0.75×Ta content(at%)+4×O content(at%) is 32 to 39 at%; wherein, the O content is 0.5 to 1.5 at%, the Zr content is ≤4 at%, and the balance Ti with inevitable impurities; wherein, the hardness of the solution-treated material is ≥200 Hv, the hardness of the 95% cold-worked material is ≤300 Hv, and a work hardening rate defined by formula (2): the work hardening rate (%)={the hardness (Hv) of the 95% cold-worked material-the hardness (Hv) of the solution-treated material}/{the hardness (Hv) of the solution-treated material}×100 is ≤20%.
      COPYRIGHT: (C)2010,JPO&INPIT
    • 解决的问题:提供一种钛合金,其加工硬化被抑制,以便在保持其高强度的同时获得稳定的高加工性。 解决方案:钛合金在Nb,Zr,Ta和O中至少包含Nb和O的化学组成,其中由式(1)定义的Nb当量:Nb当量(at%)= Nb含量(在 %)+ 0.875×Zr含量(at%)+ 0.75×Ta含量(at%)+ 4×O含量(at%)为32〜39原子% 其中,O含量为0.5〜1.5原子%,Zr含量≤4原子%,余量为Ti与不可避免的杂质; 其中,溶液处理材料的硬度≥200Hv,95%冷加工材料的硬度≤300Hv,由式(2)定义的加工硬化率:加工硬化率(%)= 95%冷加工材料的硬度(Hv) - 溶液处理材料的硬度(Hv)/溶液处理材料的硬度(Hv)×100为≤20%。 版权所有(C)2010,JPO&INPIT
    • 8. 发明专利
    • METHOD FOR PRODUCING COMPOSITE NANOPARTICLE HAVING FePt CORE/Fe SHELL STRUCTURE
    • 用于生产具有FePt核/ Fe壳结构的复合纳米颗粒的方法
    • JP2008248364A
    • 2008-10-16
    • JP2007094700
    • 2007-03-30
    • Kyoto UnivToyota Central R&D Labs IncToyota Motor Corpトヨタ自動車株式会社国立大学法人京都大学株式会社豊田中央研究所
    • YAMAMOTO SHINPEISATO TAKESHISAKUMA NORITSUGUSHOJI TETSUYAKATO AKIRA
    • B22F1/02B22F1/00B82B3/00
    • PROBLEM TO BE SOLVED: To provide a method for producing composite nanoparticles having an FePt core/Fe shell structure exhibiting excellent characteristics.
      SOLUTION: In the method for producing composite nanoparticles having an FePt core/Fe shell structure where FePt core particles of nanosizes are coated with an Fe shell, a polar solvent is added to a first solution in which FePt core particles previously subjected to heat treatment for forming a crystal structure exhibiting required characteristics are dispersed into a first organic solvent with a first dispersant, thus the first dispersant is peeled away from the FePt core particles, and the FePt core particles are flocculated and recovered, the precursor of a shell is added to a second solution obtained by dispersing the recovered core particles into a second organic solvent with a second dispersant so as to form Fe shell on the surface of the FePt core particles, and the FePt core/Fe shell particles are subjected to heat treatment at a temperature of the boiling point of the second dispersant or above to
    • 要解决的问题:提供一种具有表现出优异特性的FePt核/ Fe壳结构的复合纳米颗粒的制造方法。 解决方案:在具有FePt核/ Fe壳结构的复合纳米颗粒的制备方法中,其中FePt纳米颗粒的核心颗粒被Fe壳涂覆,将极性溶剂加入到先前经受过FePt核心颗粒的第一溶液中 形成具有所需特性的晶体结构的热处理用第一分散剂分散在第一有机溶剂中,因此第一分散剂从FePt芯颗粒上剥离,并且FePt核颗粒被絮凝和回收,壳的前体 加入到通过第二分散剂将回收的芯颗粒分散到第二有机溶剂中以在FePt芯颗粒的表面上形成Fe壳而获得的第二溶液中,并对FePt核/ Fe壳颗粒进行热处理 在还原气氛中在第二分散剂的沸点或高于<400℃的温度下进行。 版权所有(C)2009,JPO&INPIT
    • 10. 发明专利
    • Method for producing metal magnetic particle
    • 生产金属磁性颗粒的方法
    • JP2007239078A
    • 2007-09-20
    • JP2006066757
    • 2006-03-10
    • Toyota Central Res & Dev Lab IncToyota Motor Corpトヨタ自動車株式会社株式会社豊田中央研究所
    • SAKUMA NORITSUGUSHOJI TETSUYATAJIMA SHINTAKEUCHI HISATO
    • B22F9/24C22C5/04
    • PROBLEM TO BE SOLVED: To provide a method for producing metal magnetic particles capable of easily obtaining FePt based metal magnetic particles having high coercive force as the material for a magnetic recording medium.
      SOLUTION: The method for producing metal magnetic particles comprises a heating stage where a solution containing: a compound having a triphenylmethane skeleton which includes a hydroxyl group as a substitutional group for increasing the boiling point of the compound having a triphenylmethane skeleton or further includes an alkyl group as a substitutional group for increasing the boiling point of the compound having a triphenylmethane skeleton; iron acetylacetonate; platinum acetylacetonate; and tetraethyleneglycol as a reducing agent is heated at ≥330°C, so as to obtain metal magnetic particles.
      COPYRIGHT: (C)2007,JPO&INPIT
    • 解决的问题:提供一种能够容易地获得具有高矫顽力的FePt基金属磁性颗粒的金属磁性颗粒的制造方法,作为磁记录介质的材料。 解决方案:金属磁性颗粒的制造方法包括:加热阶段,其中含有具有三苯甲烷骨架的化合物的溶液,所述三苯甲烷骨架包括羟基作为用于提高具有三苯甲烷骨架的化合物的沸点的取代基或更进一步 包括烷基作为提高具有三苯甲烷骨架的化合物的沸点的取代基; 乙酰丙酮铁 乙酰丙酮铂 和作为还原剂的四乙二醇在≥330℃下加热,得到金属磁性颗粒。 版权所有(C)2007,JPO&INPIT