Calcination and solid state reaction of ceramic-forming components to provide single-phase ceramic product having fine particle size
Patent Application
·
OSTI ID:10160409
The invention consists of an improved method for the preparation of single phase, fine grained ceramic materials from precursor powder mixtures where at least one of the components of the mixture is an alkali earth carbonate. The process consists of heating the precursor powders in a partial vacuum under flowing oxygen and under conditions where the partial pressure of CO{sub 2} evolved during the calcination is kept to a very low level relative to the oxygen. The process has been found particularly suitable for the preparation of high temperature copper oxide superconducting materials such as YBa{sub 2}Cu{sub 3}O{sub x} ``123`` and YBa{sub 2}Cu{sub 4}O{sub 8} ``124``.
- Research Organization:
- Argonne National Lab., IL (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- W-31109-ENG-38
- Assignee:
- Dept. of Energy
- Patent Number(s):
- PATENTS-US-A7589562
- Application Number:
- ON: DE92016638; PAN: 7-589,562
- OSTI ID:
- 10160409
- Resource Relation:
- Other Information: PBD: 28 Sep 1990
- Country of Publication:
- United States
- Language:
- English
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