Shrinkage control of cellular ceramic bodies having axial cavities
US4014968A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jul 19, 1974 |
| Grant date | Mar 29, 1977 |
| Priority date | — |
| Expiry date | Jul 19, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/24149
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Method of reducing the firing shrinkage of the axial hub opening in a disc-type cellular or honeycomb, ceramic heat exchanger by substantially filling the hub opening with a plug which undergoes substantially the same firing shrinkage as the hub opening. The plug then shrinks with the heat exchanger and keeps the hub opening closed, thereby preventing accelerated heating of the cellular ceramic nearest the hub opening and corresponding local increase in the firing shrinkage due to the accelerated heating. A plug with a bulk density closely approximating that of the ceramic matrix is desirable and a plug fashioned from the same cellular ceramic material as the matrix is particularly convenient and effective.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.