Apparatus and method for monitoring a temperature using a thermally fused composite ceramic blackbody temperature probe
US5364186A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 28, 1992 |
| Grant date | Nov 15, 1994 |
| Priority date | — |
| Expiry date | Apr 28, 2012 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01J5/0887
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A blackbody high temperature probe is formed by thermally fusing a coating of composite ceramic material on the tip of a high temperature lightpipe or fiber. The ceramic coating replaces conventional sputtered metallic thin films to form a blackbody optical cavity. The ingredients of the composite ceramic material include a mixture of refractory metal oxides forming the bulk of the material, various pigments and/or refractory metal powders, and binding agents. A firing process is used to thermally fuse the coating onto the lightpipe. Embodiments of the firing process include using a flame or furnace technique, or alternatively using various flame- or plasma- spraying techniques. A thermally fused coating of from 10 to a few hundred micrometers provides a durable blackbody temperature sensor suitable for use in a wide range of applications including measurements in high temperature, high flow rate and abrasive environments such as that encountered in an internal combustion engine, gas turbine or rocket exhaust stream.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.