Green bodies formed from inorganic powders and a carboxylic acylating agent
US5585428A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 1, 1995 |
| Grant date | Dec 17, 1996 |
| Priority date | — |
| Expiry date | Aug 1, 2015 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/634
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
The invention relates to PA1 (1) a method of preparing sintered shapes, comprising the steps of forming a green body from a mixture comprising (A) a major amount of at least one inorganic powder with (B) at least one reaction product of a alkanol-amine with a hydrocarbyl-substituted carboxylic acylating agent provided that when the hydrocarbyl group of the acylating agent contains less than 40 carbon atoms then the carboxylic acylating agent is a polycarboxylic acylating agent; and (2) sintering the body. Sintered shapes made from the methods of the present invention have relatively high fired densities and small uniform grain sizes; and low porosity. The reaction products of the present invention help disperse the inorganic powder. These reaction products also improve deagglomeration of the inorganic powder and help prevent reagglomeration of the powder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.