TOP > 外国特許検索 > METHOD FOR PRODUCING NEGATIVE THERMAL EXPANSION MATERIAL, METHOD FOR PRODUCING REACTION PRECURSOR OF NEGATIVE THERMAL EXPANSION MATERIAL, REACTION PRECURSOR OF NEGATIVE THERMAL EXPANSION MATERIAL, AND NEGATIVE THERMAL EXPANSION MATERIAL

METHOD FOR PRODUCING NEGATIVE THERMAL EXPANSION MATERIAL, METHOD FOR PRODUCING REACTION PRECURSOR OF NEGATIVE THERMAL EXPANSION MATERIAL, REACTION PRECURSOR OF NEGATIVE THERMAL EXPANSION MATERIAL, AND NEGATIVE THERMAL EXPANSION MATERIAL

Foreign code F210010579
File No. (KP19-1089)
Posted date 2021年11月2日
Country 世界知的所有権機関(WIPO)
International application number 2021JP007404
International publication number WO 2021172525
Date of international filing 令和3年2月26日(2021.2.26)
Date of international publication 令和3年9月2日(2021.9.2)
Priority data
  • 特願2020-032076 (2020.2.27) JP
Title METHOD FOR PRODUCING NEGATIVE THERMAL EXPANSION MATERIAL, METHOD FOR PRODUCING REACTION PRECURSOR OF NEGATIVE THERMAL EXPANSION MATERIAL, REACTION PRECURSOR OF NEGATIVE THERMAL EXPANSION MATERIAL, AND NEGATIVE THERMAL EXPANSION MATERIAL
Abstract This method for producing a negative thermal expansion material comprises: a step for dissolving, in a neutral or acidic solution, a bismuth salt, a nickel salt, a salt of a metal M capable of forming a trivalent ion, and optionally a rare-earth element salt or an antimony salt, to form a metal salt solution; a step for mixing the metal salt solution with a hypohalite salt and an alkaline compound and causing a metal salt to precipitate, to form a reaction precursor; and a step for pressurizing and heating the reaction precursor, to form a negative thermal expansion material containing a compound wherein, in BiNiO3, a portion of Bi is substituted by the rare-earth element or Sb and/or a portion of Ni is substituted by the metal capable of forming a trivalent ion.
Outline of related art and contending technology BACKGROUND ART
In recent years, with advances in nanotechnology such as LSI manufacturing, misalignment in positioning due to thermal expansion of the member has become a problem. In order to address this problem, the development of zero-expansion materials in which a material having the property of contracting upon warming, i.e., negative thermal expansion, is dispersed in a resin has progressed.
Conventionally, as a material having negative thermal expansion properties, negative thermal expansion materials in which a part of Bi is substituted with a rare earth element or Sb, or a part of Ni is substituted with Al, Fe, or the like in BiNiO3 having a perovskite structure have been known (for example, see Patent Documents 1 and 2). This negative thermally expanding material exhibits a greater negative thermal expansion than existing materials, and has a negative thermal expansion coefficient that matches the thermal expansion coefficient of many resins (for example, several 10~ 100 ppm/°C).
  • Applicant
  • ※All designated countries except for US in the data before July 2012
  • TOKYO INSTITUTE OF TECHNOLOGY
  • KANAGAWA INSTITUTE OF INDUSTRIAL SCIENCE AND TECHNOLOGY
  • Inventor
  • AZUMA Masaki
  • NISHIKUBO Takumi
  • MATSUNO Kana
  • SAKAI Yuki
  • POEPPELMEIER Kenneth
  • PAULL Ryan J.
IPC(International Patent Classification)
Specified countries National States: AE AG AL AM AO AT AU AZ BA BB BG BH BN BR BW BY BZ CA CH CL CN CO CR CU CZ DE DJ DK DM DO DZ EC EE EG ES FI GB GD GE GH GM GT HN HR HU ID IL IN IR IS IT JO JP KE KG KH KN KP KR KW KZ LA LC LK LR LS LU LY MA MD ME MG MK MN MW MX MY MZ NA NG NI NO NZ OM PA PE PG PH PL PT QA RO RS RU RW SA SC SD SE SG SK SL ST SV SY TH TJ TM TN TR TT TZ UA UG US UZ VC VN WS ZA ZM ZW
ARIPO: BW GH GM KE LR LS MW MZ NA RW SD SL SZ TZ UG ZM ZW
EAPO: AM AZ BY KG KZ RU TJ TM
EPO: AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
OAPI: BF BJ CF CG CI CM GA GN GQ GW KM ML MR NE SN ST TD TG

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