EP1028925A2 - Resistant porcelain against heat changes - Google Patents

Resistant porcelain against heat changes

Info

Publication number
EP1028925A2
EP1028925A2 EP99933464A EP99933464A EP1028925A2 EP 1028925 A2 EP1028925 A2 EP 1028925A2 EP 99933464 A EP99933464 A EP 99933464A EP 99933464 A EP99933464 A EP 99933464A EP 1028925 A2 EP1028925 A2 EP 1028925A2
Authority
EP
European Patent Office
Prior art keywords
porcelain
percent
glaze
centigrade
hours
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Withdrawn
Application number
EP99933464A
Other languages
German (de)
French (fr)
Inventor
Nafi Güral
Mehmet Karaova
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP1028925A2 publication Critical patent/EP1028925A2/en
Withdrawn legal-status Critical Current

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
    • C04B33/02—Preparing or treating the raw materials individually or as batches
    • C04B33/04—Clay; Kaolin
    • 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
    • C04B33/34—Burning methods combined with glazing
    • 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
    • C04B33/24—Manufacture of porcelain or white ware

Definitions

  • dish manufacturing is one of the world's oldest industrial branches.
  • different kinds of ceramics like china, porcelain etc. were manufactured by using different raw materials and different methods of manufacturing.
  • porcelain is intensely used both as consumer goods (ex: house-effects etc.) and in various industrial fields.
  • the porcelain which is used as house-effect, is manufactured by using various kinds of raw materials, but since centuries there has been no change in its use. Changes occurred mostly in the shape of the products but their functional features remained the same, like plates where food is put in or cups liquid drinks are filled in.
  • the porcelain, which is used as house-effect, is only a means for serving the cooked meal. For example, tea is prepared in teapots, in which water boiled in another cup and poured together with tea and also used for serving.
  • the most important reason for using the porcelain for the mentioned purposes is because of health.
  • the most important feature is the coating on the porcelain, called glaze. Due to this impermeable material there is no environment in the porcelain dishes that let the bacteria live which threats the health of humans. There is no danger for the health that may be caused by the reaction between the chemicals in the cleaning stuff and the glaze. Because of this reason porcelain remains as the most preferable house-effect.
  • Cooking means are manufactured from various materials. The most frequent used materials are metal or metal alloys. Because of they are good heat conductors and their resistance against heat and fire, they are preferred as cooking means. However this sort of materials may have many negative features. For example, cooking means made from metal loose heat very fast and the food that is in it cools earlier than expected. On the other hand, metal reacts with chemicals that may be in the meal or with chemicals that constitute the raw material of the cleaning stuff and may threat the health of humans. Since there are no other alternatives metal cooking means are still being used.
  • the aim of presented invention is to create an alternative to the metal cooking means.
  • the main characteristic of the invention is that it carries out all the functions of the metal cooking means and eliminates the negations of the metal cooking means.
  • the aim was to develop a cooking means made of porcelain that the production cost is below than the metal ones, hygienic, worth of quality, can cook more delicious food, uses less energy while cooking than their alternatives and is the most ideal environment for cooking.
  • the feature of the presented invention is that it is resistant against heat changes of high rate.
  • Porcelain which is generally used as house-effect is not resistant against heat changes of high rate.
  • porcelain is in a form of a cooking dish, is placed directly on fire or on another heating source and get touch with high graded heat, it cracks or fractures.
  • Today's technology has no product made completely out of porcelain, which can be used, for cooking.
  • the products developed for cooking are covered with asbestos at their bottom, where it get in touch with fire or heat, in this way it becomes resistant against heat changes and high degree heat.
  • using asbestos to this purpose cause danger for health, because there are negative effects in its structure. It's well known that asbestos cause pulmonary cancer. It can be taken a lot of precautions; nevertheless, it is clear that using such dangerous stuff for cooking may cause fatal diseases.
  • the presented invention has no negation in its body with the consideration of human health like the metal dishes and asbestos covered porcelain.
  • Porcelains that need different features according to its purpose of use are gained these features by changing the used raw materials or by using the same raw material in various rational compositions and different kinds of manufacture methods are applied. By using the same manufacture method and changing only the raw material rational composition, a different kind of porcelain can be obtained.
  • the basic feature of the presented invention is that when it is in a form of a dish filled with liquid, it shows resistance against sudden and high degree heat changes.
  • the contact with heat may not only be with fire but also with other heat sources where it shows the same resistance.
  • heat sources working with natural gas there was no result such like crack, fracture or deformation.
  • microwaves and cookers heated with electricity there was also no problem with microwaves and cookers heated with electricity.
  • the dish which could be put liquid in it was produced according to the described below and presented invention rational composition of raw material mixture, filled with water and frozen in deep freeze, then the dish placed on heat with frozen water in it, waited until it reached to the boiling temperature, but there was no result like crack, deformation or fracture. After the water started boiling, the dish kept on fire and waited the water in it vaporized completely, but there was again no fracture, crack or deformation.
  • the field of usage of the presented invention not limited with the followings, due to its features mentioned above, it can be used for any kind of cooking means and for industrial fields needs porcelain with the features of the submitted invention that resistant sudden and high degree heat changes.
  • Porcelain carrying the features of the presented invention was manufactured with a mixture prepared according to the rational percentage in the field between the A, B and C points given in the rational composition system of feldspar, kaolin and quartz in Figure 1.
  • Raw materials generally used in production of the porcelain, 5-10 percent feldspar, 60- 75 percent kaolin and 20-30 quartz are used for the mud of porcelain Table 1.
  • the method used in manufacturing same as the normal household porcelain, the mud prepared with the raw material mixture of the presented invention is given shape on a lathe or by casting. After the shape is given, the semi-manufactured product will be dried in order to remove the water in its body.
  • the dried products that became semi-products are put in the porcelain kiln for the primary bake for 22-24 hours at a degree of 950-1050 centigrade. After this process, the semi-product is glazed with the spitting and dipping method.
  • the glasslike layer that covers the porcelain body and after the porcelain became cold it bonds to the porcelain by chemically and physically, is called glaze. Glaze covers the whole porous surface of the porcelain body, so that water or any other liquid can not reach the porcelain body.
  • the composition of the glaze and the composition of the porcelain have to be concordant. Because of this reason every kind of porcelain has a different method for preparing glaze composition.
  • the glaze composition used for the presented invention is given in Table 2.
  • the segger formulation interval of the said glaze is given in Table 3.
  • the semi-product is put in the kiln again and baked 24 hours at 1340 - 1350 degrees centigrade in order to bake the glaze.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Dispersion Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Compositions Of Oxide Ceramics (AREA)
  • Cookers (AREA)
  • Table Devices Or Equipment (AREA)

Abstract

The subject of the presented invention is porcelain used as a house-effect that has a special rational composition of raw materials and resistant against sudden and high graded heat changes and in form of a dish which filled with liquid and placed on heat source with flame there is no fracture, crack and deformation.

Description

DESCRIPTION
RESISTANT PORCELAIN AGAINST HEAT CHANGES
Background of the invention
By using stone and soil as raw material, dish manufacturing is one of the world's oldest industrial branches. Up to now, different kinds of ceramics like china, porcelain etc. were manufactured by using different raw materials and different methods of manufacturing. In now a days technology, porcelain is intensely used both as consumer goods (ex: house-effects etc.) and in various industrial fields.
The porcelain, which is used as house-effect, is manufactured by using various kinds of raw materials, but since centuries there has been no change in its use. Changes occurred mostly in the shape of the products but their functional features remained the same, like plates where food is put in or cups liquid drinks are filled in. The porcelain, which is used as house-effect, is only a means for serving the cooked meal. For example, tea is prepared in teapots, in which water boiled in another cup and poured together with tea and also used for serving. The most important reason for using the porcelain for the mentioned purposes is because of health. The most important feature is the coating on the porcelain, called glaze. Due to this impermeable material there is no environment in the porcelain dishes that let the bacteria live which threats the health of humans. There is no danger for the health that may be caused by the reaction between the chemicals in the cleaning stuff and the glaze. Because of this reason porcelain remains as the most preferable house-effect.
Cooking means are manufactured from various materials. The most frequent used materials are metal or metal alloys. Because of they are good heat conductors and their resistance against heat and fire, they are preferred as cooking means. However this sort of materials may have many negative features. For example, cooking means made from metal loose heat very fast and the food that is in it cools earlier than expected. On the other hand, metal reacts with chemicals that may be in the meal or with chemicals that constitute the raw material of the cleaning stuff and may threat the health of humans. Since there are no other alternatives metal cooking means are still being used.
The aim of presented invention is to create an alternative to the metal cooking means. The main characteristic of the invention is that it carries out all the functions of the metal cooking means and eliminates the negations of the metal cooking means. On the other hand, the aim was to develop a cooking means made of porcelain that the production cost is below than the metal ones, hygienic, worth of quality, can cook more delicious food, uses less energy while cooking than their alternatives and is the most ideal environment for cooking.
The feature of the presented invention is that it is resistant against heat changes of high rate. Porcelain, which is generally used as house-effect is not resistant against heat changes of high rate. When porcelain, is in a form of a cooking dish, is placed directly on fire or on another heating source and get touch with high graded heat, it cracks or fractures. Today's technology has no product made completely out of porcelain, which can be used, for cooking. Up to now, the products developed for cooking are covered with asbestos at their bottom, where it get in touch with fire or heat, in this way it becomes resistant against heat changes and high degree heat. However, using asbestos to this purpose cause danger for health, because there are negative effects in its structure. It's well known that asbestos cause pulmonary cancer. It can be taken a lot of precautions; nevertheless, it is clear that using such dangerous stuff for cooking may cause fatal diseases.
The presented invention has no negation in its body with the consideration of human health like the metal dishes and asbestos covered porcelain. A porcelain which is resistant against high graded heat changes and heat sources with or without flame, that is, if it comes in contact with heat sources working with natural gas, liquid petroleum gas or electricity, there is no crack or fracture, this kind of porcelain is manufactured by using the production methods and the raw material mixture according to their rational composition, which are described below. Description of the invention
Porcelains that need different features according to its purpose of use, are gained these features by changing the used raw materials or by using the same raw material in various rational compositions and different kinds of manufacture methods are applied. By using the same manufacture method and changing only the raw material rational composition, a different kind of porcelain can be obtained.
The basic feature of the presented invention is that when it is in a form of a dish filled with liquid, it shows resistance against sudden and high degree heat changes. The contact with heat may not only be with fire but also with other heat sources where it shows the same resistance. For example, on the flame of heat sources working with natural gas, there was no result such like crack, fracture or deformation. There was also no problem with microwaves and cookers heated with electricity.
The dish which could be put liquid in it was produced according to the described below and presented invention rational composition of raw material mixture, filled with water and frozen in deep freeze, then the dish placed on heat with frozen water in it, waited until it reached to the boiling temperature, but there was no result like crack, deformation or fracture. After the water started boiling, the dish kept on fire and waited the water in it vaporized completely, but there was again no fracture, crack or deformation.
The same experiment was made by putting oil in dish, which was produced according the presented invention; there was again no fracture, crack or deformation.
The field of usage of the presented invention, not limited with the followings, due to its features mentioned above, it can be used for any kind of cooking means and for industrial fields needs porcelain with the features of the submitted invention that resistant sudden and high degree heat changes.
The porcelain which is resistant against sudden and high degree heat changes and does not loose its physical, mechanical, chemical and electrical features by such heat changes, the rational composition of the raw material mixture will be explained in detail by the help of the Figure 1.
Porcelain carrying the features of the presented invention was manufactured with a mixture prepared according to the rational percentage in the field between the A, B and C points given in the rational composition system of feldspar, kaolin and quartz in Figure 1.
Detailed Description of the invention
Raw materials generally used in production of the porcelain, 5-10 percent feldspar, 60- 75 percent kaolin and 20-30 quartz are used for the mud of porcelain Table 1. The method used in manufacturing same as the normal household porcelain, the mud prepared with the raw material mixture of the presented invention is given shape on a lathe or by casting. After the shape is given, the semi-manufactured product will be dried in order to remove the water in its body.
Table 1: Percentage of rational mixture of the raw materials
Feldspar 5 - 10 Kaolin 75 - 60 Quartz 20 - 30
The dried products that became semi-products are put in the porcelain kiln for the primary bake for 22-24 hours at a degree of 950-1050 centigrade. After this process, the semi-product is glazed with the spitting and dipping method.
The glasslike layer that covers the porcelain body and after the porcelain became cold it bonds to the porcelain by chemically and physically, is called glaze. Glaze covers the whole porous surface of the porcelain body, so that water or any other liquid can not reach the porcelain body. The composition of the glaze and the composition of the porcelain have to be concordant. Because of this reason every kind of porcelain has a different method for preparing glaze composition.
The glaze composition used for the presented invention is given in Table 2. The segger formulation interval of the said glaze is given in Table 3.
Table 2: Glaze composition interval (percentage)
Feldspar 10 - 16
Kaolin 12 - 8
Quartz 45 - 55
Marble 7 - 13
Dolomite 8 - 3
Table 3: The segger formulation interval of glaze
NaiO 0,050 - 0,090 AI2O3 0,500 - 1,000
K2O 0,100 - 0,150 Fe2θ3 0,005 - 0,010
CaO 0,450 - 0,900 SiO2 5,000 - 10,00
MgO 0,080 - 0,130 TiOi 0,001 - 0,003
After the application of glaze, the semi-product is put in the kiln again and baked 24 hours at 1340 - 1350 degrees centigrade in order to bake the glaze.
The production method explained above is used for the manufacture of cooking means which are used as house-effect and is given as examples to explain the invention in details. In the other fields of usage of the invention especially in industrial fields may different production methods be able to be applied. When the raw materials feldspar, kaolin and quartz that bring the content of the invention into existence, have good quality, the result will be better. When the mixture given in Figure 1 and the mentioned raw materials given in Table 1. Are used according to the given rational composition limits and by applying the above described process, the embodiment of submitted invention, porcelain that is resistant against high and sudden heat changes, will be reached.

Claims

Claim 1. Porcelain dishes that can be placed on heat source with or without flame and is resistant against high graded and sudden heat changes, which raw materials rational composition are feldspar 5 - 10 percent, kaolin 75 - 60 percent and quartz 20 - 30 percent used in preparing for the mud of the porcelain, after giving the shape to mud as a dish, the moisture in it dried; then, it is put in kiln for the first baking at 950 - 1050 centigrade for 22-24 hours; between constrains of the glaze formulation and segger formulation given in Table 2 and Table 3, the product glazed using the known methods; the glazed product put in the kilns for the secondary baking at 1340 - 1350 centigrade for 24 hours and obtained a porcelain dish in which food or such things are put in it and can be placed on powerful heat sources with or without flame and there is no fracture, crack or deformation.
Claim 2. The porcelain according to claim 1 characterized in which can be placed directly on heat source with or without flame and is resistance against high graded and sudden heat changes and percentage of rational composition of the raw materials are feldspar 5 - 10 percent, kaolin 60 - 75 percent and quartz 20 - 30 percent and shown in the area which is between the points A, B and C in Figure 1.
Claim 3. The porcelain according to claim 1 characterized in which can be placed directly on heat source with or without flame and is resistance against high graded and sudden heat changes and the method of production that is; shaped as a dish from the mud obtained by using the raw material mixture as described the in claim 1 , first dried to remove the moisture, then put in the kiln for first baking at 950 - 1050 centigrade for 22 - 24 hours and glaze in the semi product by using the known methods with the glaze according to glaze and segger formulation given Table 2 and Table 3, and put in the kilns again for secondary baking at 1340 - 1350 centigrade for 24 hours.
Claim 4. The porcelain according to claims 1 to 3 characterized in which can be placed directly on heat source with or without flame and is resistance against high graded and sudden heat changes and percentage of rational composition of the raw materials are feldspar 5 - 10 percent, kaolin 60 - 75 percent and quartz 20 - 30 percent and using the method of production such as; shaped the mud obtained by using this mixture, first dried to remove the moisture, then put in the kiln for first baking at 950 - 1050 centigrade for 22 - 24 hours and glaze in the semi product by using the known methods with the glaze according to glaze and segger formulation given Table 2 and Table 3. and put in the kilns again for secondary baking at 1340 - 1350 centigrade for 24 hours and using the porcelain in other fields suitable to its characteristics of resistance to sudden and high grade heat changes.
EP99933464A 1998-07-28 1999-07-23 Resistant porcelain against heat changes Withdrawn EP1028925A2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
TR9801455 1998-07-28
TR9801455 1998-07-28
PCT/TR1999/000031 WO2000006513A2 (en) 1998-07-28 1999-07-23 Resistant porcelain against heat changes

Publications (1)

Publication Number Publication Date
EP1028925A2 true EP1028925A2 (en) 2000-08-23

Family

ID=21621594

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99933464A Withdrawn EP1028925A2 (en) 1998-07-28 1999-07-23 Resistant porcelain against heat changes

Country Status (9)

Country Link
EP (1) EP1028925A2 (en)
JP (1) JP2003520174A (en)
KR (1) KR20010024310A (en)
CN (1) CN1274340A (en)
AU (1) AU4951499A (en)
BG (1) BG104306A (en)
HU (1) HUP0003889A2 (en)
PL (1) PL340267A1 (en)
WO (1) WO2000006513A2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ES2262433B1 (en) * 2005-05-11 2007-12-01 Taulell, S.A. PORCELAIN MATERIAL.
KR101013201B1 (en) * 2008-08-25 2011-02-10 장영안 A Wicker Tray and Manufacturing Method of
CN102166782B (en) * 2010-11-29 2012-06-20 盱眙县科源新材料厂 Method for producing attapulgite ceramic slurry
CN102166783B (en) * 2010-11-29 2012-06-20 盱眙县科源新材料厂 Production method of attapulgite china clay powder
CN102167561B (en) * 2010-11-29 2012-06-20 盱眙县科源新材料厂 Production method for attapulgite ceramic mud
CN102167528B (en) * 2010-11-29 2012-06-20 盱眙县科源新材料厂 Production method for attapulgite ceramic plastic mass
DK2855396T3 (en) * 2012-05-30 2018-01-22 Kütahya Porselen Sanayi Anonim Sirketi PORCELAIN CANNER FOR FOOD COOKING IN DIRECT CONTACT WITH ILD

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU1544750A1 (en) * 1988-01-12 1990-02-23 Ташкентский Политехнический Институт Им.А.Р.Бируни Ceramic composition for making porcelain
SU1706999A1 (en) * 1989-09-12 1992-01-23 Всесоюзный научно-исследовательский институт фарфоро-фаянсовой промышленности Method of producing porcelain products
SU1728209A1 (en) * 1990-04-06 1992-04-23 Государственный научно-исследовательский институт строительной керамики Method of ceramic articles decoration

Non-Patent Citations (13)

* Cited by examiner, † Cited by third party
Title
FUNK W.: "ROHSTOFFE DER FEINKERAMIK - IHRE AUFBEREITUNG UND VERARBEITUNG ZU MASSEN UND GLASUREN", 1936, SPRINGER VERLAG, BERLIN, article "Die Massen und Glasuren der einzelnen feinkeramischen Warengattungen", pages: 316, XP002949373
FUNK W.: "ROHSTOFFE DER FEINKERAMIK - IHRE AUFBEREITUNG UND VERARBEITUNG ZU MASSEN UND GLASUREN", 1936, SPRINGER VERLAG, BERLIN, article "Feuerfeste und hochfeuerfeste feinkeramische Erzeugnisse", pages: 315 - 322, XP002949376
FUNK W.: "ROHSTOFFE DER FEINKERAMIK - IHRE AUFBEREITUNG UND VERARBEITUNG ZU MASSEN UND GLASUREN", 1936, SPRINGER VERLAG, BERLIN, article "Hartporzellan", pages: 295, XP002949374
FUNK W.: "ROHSTOFFE DER FEINKERAMIK - IHRE AUFBEREITUNG UND VERARBEITUNG ZU MASSEN UND GLASUREN", 1936, SPRINGER VERLAG, BERLIN, pages: 296, XP002949367
GILCHREST G.I. AND KLINEFELTER T.A.: "Electrical Porcelain", ELECTR. J., 1918, pages 36 - 39, XP000945126
HANDREK H.: "Technik und Wissenschaft", KERAMISCHE RUNDSCHAU UND KUNST - KERAMIK, vol. 36, no. 19, 10 May 1928 (1928-05-10), pages 363 - 365, XP002949375
HECHT H.: "LEHRBUCH DER KERAMIK", 1930, VERLAG URBAN & SCHWARZENBERG, BERLIN, article "Das Brennen der Tonwaren", pages: 102, XP002949370
HECHT H.: "LEHRBUCH DER KERAMIK", 1930, VERLAG URBAN & SCHWARZENBERG, BERLIN, article "Das Glasieren", pages: 408, XP002949371
HECHT H.: "LEHRBUCH DER KERAMIK", 1930, VERLAG URBAN & SCHWARZENBERG, BERLIN, article "Das Trocknen der Tonwaren", pages: 99, XP002949369
HECHT H.: "LEHRBUCH DER KERAMIK", 1930, VERLAG URBAN & SCHWARZENBERG, BERLIN, article "Formgebung der Tonwaren", pages: 81, XP002949368
KRAUSE O.: "STRUKTURUNTERSUCHUNGEN AM HARTPORZELLAN", 1928, pages: 247 - 263, XP000944958
MÖRTEL H.: "Schnellbrandporzellen - Möglichkeiten und Grenzen", CFI, 1985, XP002949372
SCHÜLLER K.H.: "BER.DT.KERAM.GES. 40", part IV 1963, article "Untersuchungen über die Gefügeausbildung im Porzellan", XP000944845

Also Published As

Publication number Publication date
WO2000006513A2 (en) 2000-02-10
WO2000006513A3 (en) 2000-04-27
HUP0003889A2 (en) 2001-03-28
KR20010024310A (en) 2001-03-26
CN1274340A (en) 2000-11-22
BG104306A (en) 2001-05-31
PL340267A1 (en) 2001-01-29
AU4951499A (en) 2000-02-21
JP2003520174A (en) 2003-07-02

Similar Documents

Publication Publication Date Title
CN108083764A (en) Selenium-rich ceramic utensil and its preparation process
CN102795845A (en) Stewing porcelain for electromagnetic oven and production method of porcelain
CN101786860B (en) Microwave heating body and method for manufacturing same
KR20140100398A (en) Heat emitting compositon absorbing micorwave and emitting heat, and Transfer paper comprising it, and Ceramic ware for heating, and Preparation method thereof
EP1028925A2 (en) Resistant porcelain against heat changes
CN105534319B (en) A kind of ceramic liner of IH electric cookers and preparation method thereof
CN101913849A (en) Heat-resistant ceramic for kitchen ware
CN103588465A (en) High-temperature-resistant purple sand container
EP2855396B1 (en) Porcelain pot providing cooking in direct contact with fire
KR20040099498A (en) a none crazing heat resistance ceramic kaolin and glaze composite
EP3935026A1 (en) Porcelain cooking pot and manufacture method thereof
CN103232230A (en) Low-expansion barbecue ceramic having antibacterial function and grill made of same
EP2982614B1 (en) Device for microwave cooking
JP5716910B2 (en) Ceramics and manufacturing method thereof
US20170190623A1 (en) Clay-based articles and methods of making the same
KR100334326B1 (en) Elvan Melted Ceramic Cooking Vessel
KR100719899B1 (en) High density, high strength, no crack earthen bowl manufacture method
US20160309955A1 (en) Bakeware
KR20030017722A (en) process for ceramic ware cooking ware
TR202015432A2 (en) MANUFACTURING METHOD OF FIRE-RESISTANT CERAMIC KITCHEN COOKING POTS AND CONTAINERS THAT ARE NOT AFFECTED BY Sudden TEMPERATURE CHANGES
JPH04364945A (en) High strength polycrystalline sintered ceramic laminate
CN111018489A (en) Bone china material for non-stick cookers, application of bone china material, non-stick cookers and manufacturing method of non-stick cookers
KR20000073829A (en) The method of production of heat resisting ceramic manufactures for cooking and the vessels
KR102236402B1 (en) Coating method of cooking pot metal material
CN104355599A (en) Formula of preform body of lime sand ware and preparation method of same

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

17P Request for examination filed

Effective date: 20000428

AK Designated contracting states

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

AX Request for extension of the european patent

Free format text: RO PAYMENT 20000428

TPAD Observations filed by third parties

Free format text: ORIGINAL CODE: EPIDOS TIPA

TPAD Observations filed by third parties

Free format text: ORIGINAL CODE: EPIDOS TIPA

17Q First examination report despatched

Effective date: 20011106

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: 20020201