GB697614A - A process for the production of machine parts from ceramic semi-conductive materials by electric heating - Google Patents
A process for the production of machine parts from ceramic semi-conductive materials by electric heatingInfo
- Publication number
- GB697614A GB697614A GB16279/50A GB1627950A GB697614A GB 697614 A GB697614 A GB 697614A GB 16279/50 A GB16279/50 A GB 16279/50A GB 1627950 A GB1627950 A GB 1627950A GB 697614 A GB697614 A GB 697614A
- Authority
- GB
- United Kingdom
- Prior art keywords
- conductivity
- current
- ceramic
- heating
- production
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/46—Dielectric heating
- H05B6/48—Circuits
Landscapes
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Ceramic Products (AREA)
Abstract
697,614. Heating ceramics by etectricity. MASCHINENFABRIK AUGSBURGNURNBURG AKT.-GES. June 29, 1950 [Oct. 11, 1949], No. 16279/50. Drawings to Specification, Class 39 (iii)] In the production of machine parts from semi-conductive ceramic material, e.g. gas turbine blades, the sintering temperature is produced in the ceramic by supplying electrical energy directly thereto at least during the final phase of the heating either by passage of current therethrough or by dielectric heating, the energy supply circuit having means for observing a change in an electrical characteristic of the ceramic part, the current being cut off when the means indicate a predetermined value. When current is passed through the part, the circuit includes an ammeter and voltmeter, and current is cut off when the resistance of the .part reaches a predetermined value corresponding to the required mechanical and thermal properties of the part, e.g. when its conductivity is at a maximum or before its conductivity decreases. When dielectric heating is used, a tuning indicator in the circuit shows a change of conductivity of the part, the electrodes being arranged to create a uniform temperature therein. When the ceramic part includes silicon carbide, fine crystals thereof are formed at the sintering temperature and the conductivity then increases.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE697614X | 1949-10-11 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB697614A true GB697614A (en) | 1953-09-23 |
Family
ID=6607975
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB16279/50A Expired GB697614A (en) | 1949-10-11 | 1950-06-29 | A process for the production of machine parts from ceramic semi-conductive materials by electric heating |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB697614A (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1029921B (en) * | 1954-10-02 | 1958-05-14 | Fred Kohler | High frequency industrial generator for capacitive heating |
DE1090798B (en) * | 1958-10-14 | 1960-10-13 | Siemens Elektrogeraete Gmbh | High frequency radiation focus |
DE1143948B (en) * | 1956-10-19 | 1963-02-21 | Gen Motors Corp | System for dielectric heating |
-
1950
- 1950-06-29 GB GB16279/50A patent/GB697614A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1029921B (en) * | 1954-10-02 | 1958-05-14 | Fred Kohler | High frequency industrial generator for capacitive heating |
DE1143948B (en) * | 1956-10-19 | 1963-02-21 | Gen Motors Corp | System for dielectric heating |
DE1090798B (en) * | 1958-10-14 | 1960-10-13 | Siemens Elektrogeraete Gmbh | High frequency radiation focus |
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