Negative thermal expansion material and composite material comprising same
US10280086B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Oct 4, 2016 |
| Grant date | May 7, 2019 |
| Priority date | — |
| Expiry date | Oct 4, 2036 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B2235/9607
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.