Method for sintering ceramics
AssigneeFord Motor Company
InventorJames N. Lingscheit
Life of this patent
Estimating the term…
Abstract
A method of sintering green ceramic bodies comprised of polycrystalline bi- or multi-metal oxides comprising: (A) encapsulating the body to be sintered in a chamber having (i) an inner wall portion comprised of a sintered polycrystalline bi- or multi-metal oxide composition of the same type as the body being sintered such that upon heating during the sintering process volatile metal oxide constituents of said composition create an atmosphere of said constituents which surrounds the body being sintered and (ii) an outer wall portion comprised of a substantially impervious sintered ceramic which is essentially nonreactive with said polycrystalline bi- or multi-metal oxides; and (B) heating the chamber with said body encapsulated therein to a temperature and for a time necessary to sinter said body to the desired density.
Claims12
A method for sintering a green ceramic body comprised of polycrystalline bi- or multi-metal oxides comprising:
- A. encapsulating said body in a chamber having inner and outer wall portions, said inner wall portion being
- i. adjacent to said body being sintered and
- ii. comprised of a sintered polycrystalline bi- or multi-metal oxide composition of the same type as said body being sintered such that upon heating during the sintering process volatile metal oxide constituents of said composition create an atmosphere of said constituents which surrounds said body being sintered, and
- said outer wall portion being
- i. adjacent to, contiguous with and integrally bonded to the entire outer surface of said inner wall portion and
- ii. comprised of a substantially impervious sintered ceramic which is essentially nonreactive with said polycrystalline bi- or multi-metal oxides;
- and
- B. heating said chamber with said body encapsulated therein to a temperature and for a time necessary to sinter said body to the desired density.
Dependencies are inferred from the claim text.