Method for synthesizing a composite oxide by citrating process
US5168095A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Feb 21, 1991 |
| Grant date | Dec 1, 1992 |
| Priority date | — |
| Expiry date | Feb 21, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S505/737
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A composite oxide synthesized by a citrating process and utilized in functional ceramics materials is prepared by the following process. Co-precipitants or mixtures of at least one component selected from the group consisting of carbonates, basic copper and/or hydroxides of elements which compose a composite oxide are reacted with citric acid in an aqueous solution or in an organic solvent. The elements are selected from at least one element of the group consisting of Y, rare earth elements, transition elements, and alkali metal or alkaline earth metal elements. The citrate compound formed is baked to complete the composite oxide. The composite oxide synthesized by this invention has superconduction at the most temperature of 93.degree. K. with excellent Meissner effect.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.