Apparatuses, processes and articles for controllably heating and drying materials by microwave radiation
US4566804A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 16, 1982 |
| Grant date | Jan 28, 1986 |
| Priority date | — |
| Expiry date | Dec 16, 2002 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH05B2206/046
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An apparatus for controllably heating material directly and indirectly by microwave radiation comprises a chamber in which the material to be heated (often to dryness, as for analysis) is placed, a source of microwave radiation for radiating into materials in such chamber for controllably heating such a material, and a support for such material, which support comprises a matrix of microwave radiation-transmissive material and a particulate microwave absorptive material dispersed in such matric material, which microwave absorptive material has a Curie temperature, above which it becomes microwave transmissive, so as thereby to prevent excessive heating of the support and the material thereon which is to be controllably heated, and which matrix material is stable and form-retaining at the Curie temperature of the dispersed material. Preferably the support will be of a silicone rubber or a polyfluoroalkylene polymer matrix, such as polytetrafluoroethylene, and the dispersed material therein will be a ferrite, garnet or mixture thereof. The apparatus may include a turntable for carrying a plurality of supports or it may include an automatic electronic balance, in both of which embodime…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.