Invention Grant
- Patent Title: Negative thermal expansion material and composite material comprising same
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Application No.: US15759333Application Date: 2016-10-04
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Publication No.: US10280086B2Publication Date: 2019-05-07
- Inventor: Junya Fukazawa , Toru Hata
- Applicant: Nippon Chemical Industrial Co., Ltd.
- Applicant Address: JP Tokyo
- Assignee: NIPPON CHEMICAL INDUSTRIAL CO., LTD.
- Current Assignee: NIPPON CHEMICAL INDUSTRIAL CO., LTD.
- Current Assignee Address: JP Tokyo
- Agency: Westerman, Hattori, Daniels & Adrian, LLP
- Priority: JP2015-199000 20151007; JP2016-124308 20160623; JP2016-192427 20160930
- International Application: PCT/JP2016/079397 WO 20161004
- International Announcement: WO2017/061403 WO 20170413
- Main IPC: C01B25/00
- IPC: C01B25/00 ; C01B25/45 ; C04B14/36 ; B01J2/06 ; C09C1/00 ; C04B35/00 ; C04B22/00 ; C01B25/37 ; C04B103/52

Abstract:
The present application provides a negative thermal expansion material having excellent dispersibility and packing properties in a positive thermal expansion material. The negative thermal expansion material of the present invention comprises spherical zirconium tungsten phosphate having a BET specific surface area, of 2 m2/g or smaller. The degree of sphericity is preferably 0.90 or more and 1 or less. Also preferably, the negative thermal expansion material further contains at least Mg and/or V as a subcomponent element. Also preferably, the content of the subcomponent element is 0.1% by mass or more and 3% by mass or less. Also preferably, the average particle size is 1 μm or larger and 50 μm smaller.
Public/Granted literature
- US20180251376A1 NEGATIVE THERMAL EXPANSION MATERIAL AND COMPOSITE MATERIAL COMPRISING SAME Public/Granted day:2018-09-06
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