Method for preparation of high temperature superconductors using trichloroacetates
US4859652A · kind A · utility
18Cited by
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7Claims
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Key dates
| Filing date | Nov 16, 1987 |
| Grant date | Aug 22, 1989 |
| Priority date | — |
| Expiry date | Nov 16, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S505/81
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Superior homogeneity in ceramic materials is achieved by forming an aqueous solution of trichloroacetates of certain metals, heating the solution to decompose the trichloroacetates to form carbonate precipitates, and recovering the carbonate precipitates. The latter can be calcined to form superconductors. For example, oxides, or carbonates of Y, Ba, and Cu are dissolved in aqueous trichloroacetic acid and the solution is heated to decompose trichloroacetate ions and to form mixed carbonates, which precipitate. The precipitate is recovered and calcined to form a superconducting material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.