EP0456786A1 - Processing of ceramic materials with radio-frequencies of the microwave and uhf zones both modulated or non-modulated - Google Patents
Processing of ceramic materials with radio-frequencies of the microwave and uhf zones both modulated or non-modulatedInfo
- Publication number
- EP0456786A1 EP0456786A1 EP90917267A EP90917267A EP0456786A1 EP 0456786 A1 EP0456786 A1 EP 0456786A1 EP 90917267 A EP90917267 A EP 90917267A EP 90917267 A EP90917267 A EP 90917267A EP 0456786 A1 EP0456786 A1 EP 0456786A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- modulated
- uhf
- microwave
- firing
- frequencies
- 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.)
- Withdrawn
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B33/00—Clay-wares
- C04B33/32—Burning methods
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/64—Burning or sintering processes
Definitions
- the present innovation introduces radio frequencies for the defrost and the drying of raw matterials.
- the present innovation introduces the use of radio frequencies so as to provide the ceramic material with the energy required to obtain its final molecular structure i .e. the "firing" of the ceramic material.
- Ceramics are generally considered to be dielectric materials. When such a material is exposed to electromagnetic radiation of a given frequency (in the present case UHF or microwaves) then a higher or lower temperature is produced. A correct selection of the energy level and the frequency of the electromagnetic wave gives a dramatic increase of the heat in the mass of the dielectric.
- a given frequency in the present case UHF or microwaves
- the hardware required for the application of this method consists of :
- the shaped product placed on the conveyor enters the chamber where by means of the electromagnetic radiation the water present in the mass is evaporated and is being removed by the drafts created with the electric fans. Then the "firing" process begins by means of high power electromagnetic radiation modulated if necessary .
- the frequencies employed are closely related to the mineral present in the mass, the thickness of the mass and the geometrical features of the product.
- the power of the electromagnetic wave to be radiated is closely related to electromagnetic features of the ceramic mass, and is controlled by means of a microprocessor.
- the necessary power distribution is obtained by means of the antenna system and the number of electromagnetic sources employed and is determined by the time required for the "firing" process.
- the required frequency spectrum and bandwidth is obtained by means of modulation, while the various modes by mode stirrers. The whole procedure is computer controlled.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Dispersion Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
- Drying Of Solid Materials (AREA)
- Constitution Of High-Frequency Heating (AREA)
Abstract
L'invention prévoit l'emploi de hautes fréquences modulées ou non modulées des zones de micro-ondes et UHF, dans le traitement de matériaux céramiques. Le terme ''traitement'' signifie le dégivrage et le séchage de matière première lorsque cela est nécessaire, le séchage du produit façonné et la ''cuisson'' afin d'obtenir sa structure moléculaire finale. Le terme ''céramique'' signifie matériau ''inorganique non métallique''.The invention provides for the use of modulated or unmodulated high frequencies of microwave and UHF zones in the treatment of ceramic materials. The term "treatment" means defrosting and drying of raw material when necessary, drying of the shaped product and "cooking" in order to obtain its final molecular structure. The term "ceramic" means material "inorganic non-metallic".
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GR90200248U GR2000727Y (en) | 1989-11-28 | 1989-11-28 | Ceramic materials treatment by radio frequency |
GR90020248 | 1989-11-28 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0456786A1 true EP0456786A1 (en) | 1991-11-21 |
Family
ID=10940511
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90917267A Withdrawn EP0456786A1 (en) | 1989-11-28 | 1990-11-28 | Processing of ceramic materials with radio-frequencies of the microwave and uhf zones both modulated or non-modulated |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0456786A1 (en) |
AU (1) | AU6753490A (en) |
BG (1) | BG94897A (en) |
GR (1) | GR2000727Y (en) |
WO (1) | WO1991008177A1 (en) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2315654B (en) * | 1996-07-25 | 2000-08-09 | Ea Tech Ltd | Radio-frequency and microwave-assisted processing of materials |
RU2197424C1 (en) * | 2002-03-19 | 2003-01-27 | Общество с ограниченной ответственностью "Ярси" | Aluminosilicate material production process |
WO2016105293A2 (en) * | 2014-12-26 | 2016-06-30 | ECZACIBAŞI YAPI GEREÇLERİ SANAYİ VE TİCARET ANONİM ŞİRKETİ ANONIM SIRKETi | A method with respect to the use of microwave oven in the production of ceramic sanitary ware |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2331663A1 (en) * | 1973-06-22 | 1975-01-16 | Albert Refratechnik | PROCESS FOR PRODUCING CHEMICALLY BONDED FIRE-RESISTANT MOLDED BODIES |
JPS5823349B2 (en) * | 1975-08-11 | 1983-05-14 | 新日本製鐵株式会社 | Tai Kabutunoshiyouketsuhouhou |
US4140887A (en) * | 1977-05-09 | 1979-02-20 | Special Metals Corporation | Method for microwave heating |
DE3518914A1 (en) * | 1985-05-25 | 1986-11-27 | Christof Dipl.-Ing. Ropertz (FH), 7050 Waiblingen | Microwave dryer |
-
1989
- 1989-11-28 GR GR90200248U patent/GR2000727Y/en unknown
-
1990
- 1990-11-28 EP EP90917267A patent/EP0456786A1/en not_active Withdrawn
- 1990-11-28 AU AU67534/90A patent/AU6753490A/en not_active Abandoned
- 1990-11-28 WO PCT/GR1990/000009 patent/WO1991008177A1/en not_active Application Discontinuation
-
1991
- 1991-07-26 BG BG094897A patent/BG94897A/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO9108177A1 * |
Also Published As
Publication number | Publication date |
---|---|
GR2000727Y (en) | 1991-10-10 |
AU6753490A (en) | 1991-06-26 |
BG94897A (en) | 1993-12-24 |
WO1991008177A1 (en) | 1991-06-13 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT CH DE DK ES FR GB GR IT LI NL |
|
17P | Request for examination filed |
Effective date: 19911111 |
|
17Q | First examination report despatched |
Effective date: 19930524 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
18D | Application deemed to be withdrawn |
Effective date: 19941217 |