Zero thermal expansion material and practical component parts making use of the same
원문보기
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
C04B-035495
C04B-035486
출원번호
US-0837718
(2004-05-04)
우선권정보
JP-0150338 (2002-05-24); JP-0211826 (2001-07-12)
발명자
/ 주소
Suzuki, Tomoko
Omote, Atsushi
Kuwata, Jun
출원인 / 주소
Matsushita Electric Industrial Co., Ltd.
인용정보
피인용 횟수 :
3인용 특허 :
7
초록▼
Using as a negative thermal expansion material a double oxide containing at least partly a compound represented by the chemical formula: RQ,O, (wherein R is Zr, Hf or a tetravalent metallic element represented by a mixture system of these, and Q is a hexavalent metallic element selected from W and M
Using as a negative thermal expansion material a double oxide containing at least partly a compound represented by the chemical formula: RQ,O, (wherein R is Zr, Hf or a tetravalent metallic element represented by a mixture system of these, and Q is a hexavalent metallic element selected from W and Mo), and using as a positive thermal expansion material a material containing at least partly a compound represented by the chemical formula: MQX, (wherein M is Mg, Ca, Sr, Ba, Ra or a divalent metallic element represented by a mixture system of any of these, Q is a hexavalent metallic element selected from W and Mo, and X is an element selected from O and S), these are mixed preferably in a weight ratio of 1:1 and are synthesized to obtain a material whose coefficient of thermal expansion is substantially zero over a wide temperature range, i.e., a zero thermal expansion material. Using this zero thermal expansion material, high-precision and high-performance practical component parts can be obtained.
대표청구항▼
1. A process for producing a zero thermal expansion material; the process comprising mixing a negative thermal expansion material and a positive thermal expansion material, followed by firing;said negative thermal expansion material comprising a double oxide containing at least partly a compound rep
1. A process for producing a zero thermal expansion material; the process comprising mixing a negative thermal expansion material and a positive thermal expansion material, followed by firing;said negative thermal expansion material comprising a double oxide containing at least partly a compound represented by the chemical formula: RQ2O8 wherein R is Zr, Hf or a tetravalent metallic element represented by a mixture system of these, and Q is a hexavalent metallic element selected from W and Mo; andsaid positive thermal expansion material comprising a material containing at least partly a compound represented by the chemical formula: MQX4 wherein M is Mg, Ca, Sr, Ba, Ra or a divalent metallic element represented by a mixture system of any of these, Q is a hexavalent metallic element selected from W and Mo, and X is an element selected from O and S.2. The process for producing a zero thermal expansion material according to claim 1, wherein said R is Zr, Hf or a tetravalent metallic element containing these, said M being Mg.3. The process for producing a zero thermal expansion material according to claim 1, wherein said R is Hf, M is Mg and Q Is W.4. The process for producing a zero thermal expansion material according to claim 1, wherein a weight ratio of RQ2O8 and MOX4 is about 1:1.
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이 특허에 인용된 특허 (7)
Fleming Debra Anne (Berkeley Heights NJ) Johnson ; Jr. David Wilfred (Bedminster NJ) Lemaire Paul Joseph (Madison NJ), Article comprising a temperature compensated optical fiber refractive index grating.
Debra Anne Fleming ; David Wilfred Johnson ; Glen Robert Kowach ; Paul Joseph Lemaire, Process for making isotropic negative thermal expansion ceramics.
Suzuki,Tomoko; Omote,Atsushi; Suzuki,Masa aki, Material demonstrating negative or low thermal expansion coefficient and method for manufacture thereof.
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