Negative thermal expansion material, composite material, and method for producing negative thermal expansion material
US11970396B2 · kind B2 · utility
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12Claims
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Key dates
| Filing date | Feb 26, 2019 |
| Grant date | Apr 30, 2024 |
| Priority date | — |
| Expiry date | May 11, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01P2006/32
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A negative thermal expansion material having a negative thermal expansion coefficient according to the present invention is represented by Zr2−aMaSxP2O12+δ, where M is at least one selected from Ti, Ce, Sn, Mn, Hf, Ir, Pb, Pd, and Cr; a is 0≤a<2; x is 0.4≤x≤1; and δ is a value defined as to satisfy a charge neutral condition. The present invention makes it possible to provide a negative thermal expansion material, a composite material and a method for producing a negative thermal expansion material that can realize reduction in cost and density reduction.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.