Method to manufacture phosphate bonded ceramics
US6013321A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 27, 1997 |
| Grant date | Jan 11, 2000 |
| Priority date | — |
| Expiry date | Jun 27, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B41/85
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Methods useful in the manufacture of phosphate bonded ceramics. The invention is a method for impregnation of a green body to be fired to form a ceramic having the steps of: (a) forming a green body of unreacted ceramic materials; (b) determining the pore volume of the green body; (c) determining the amount of phosphoric acid required to react with the green body at a desired level; (d) making in impregnation solution of phosphoric acid and a carrier liquid having a ratio of phosphoric acid to carrier liquid equal to the ratio of (i) the volume of phosphoric acid determined for the reaction with the green body to (ii) the volume of carrier fluid equal to the pore volume of the green body minus the volume of the phosphoric acid determined for the reaction; (e) impregnating the green body with said solution of phosphoric acid and carrier fluid; and (f) firing the impregnated green body to form a phosphate bonded ceramic.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.