CN1094269A

CN1094269A - A kind of cooking white sand pot of tool high thermal stability

Info

Publication number: CN1094269A
Application number: CN 93105164
Authority: CN
Inventors: 张文池; 赵明生; 魏风云; 仇志芳; 王贵来
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-04-26
Filing date: 1993-04-26
Publication date: 1994-11-02
Anticipated expiration: 2013-04-26
Also published as: CN1044085C

Abstract

A kind of cooking white sand pot of tool high thermal stability, it is made up of Lithium Oxide 98min, silicon-dioxide, aluminum oxide and magnesium oxide etc.The present invention constitutes by reasonably selecting its prescription, and pot body intensity is improved, and can be used for stewing, boil, fry, exploding under the various burning things which may cause a fire disaster, and water-intake rate is less than 10%, and thermostability is better than usual production greatly, reaches 600 ℃ of-20 ℃ of heat exchanges and does not split.

Description

A kind of cooking white sand pot of tool high thermal stability

The present invention relates to a kind of improved white sand pot for cooking, belong to the ceramic cooker technical field.

Marmite is commonly used a kind of in the cooker, but that common marmite only has is stewed, the function of boiling, when being used for frying, when fried, because a pot body self-temperature changes sharply, then very easily breaking.The so-called heat-resisting white sand pot that existing market is sold, as the product on ground such as Handan, Hebei, Guangdong, Shi Wan, Yixing, Jiangsu and Japan, its heat-resistant stability is all below 300 ℃.The heat-resisting white sand pot of Jiangxi development, its heat resisting temperature is that 510 ℃ of-20 ℃ of heat exchanges are not split, water-intake rate is used it for the cooking less than 0.5%, still has fracture phenomena, also needs further to improve its thermotolerance.

The objective of the invention is to develop a kind of new cooking white sand pot, require it to have higher heat resisting temperature, to satisfy the needs of various cooking methods.

The objective of the invention is by selecting low-expansion starting material, and choose reasonable proportioning and manufacture craft realize.The invention will be further described below with reference to embodiment.

Fig. 1 is a product appearance synoptic diagram of the present invention.

Fig. 2 is the product manufacture schema.

Fig. 3 is the glaze manufacturing process flow diagram.

The little stupalith of thermal expansivity that the present invention adopts is Li ₂O, Al ₂O ₃, SiO ₂With MgO etc.The weight percent content of each component is:

A, base substrate:

SiO ₂：54-62

Al ₂O ₃：27-34

Li ₂O：2.6-3.0

CaO：1-1.5

MgO：0.9-1.2

K ₂O：0.2-0.5

Na ₂O：0.1-0.4

Igloss: 6-10

B, glaze:

SiO ₂：60-67

Al ₂O ₃：14-18

Li ₂O：2.5-3.0

CaO：3-5

MgO：4-5.2

K ₂O：1-2

Na ₂O：0.4-0.8

ZnO：4-6

Igloss: 4-6

The above-mentioned component relevant raw material that in actual production, has drawn from respectively, wherein, SiO ₂Introduce by quartz or triphane; Al ₂O ₃Introduce by feldspar, clay (comprising alkali spoil, camwood knag etc.); CaO is introduced by rhombspar; MgO is introduced by rhombspar or talcum; K ₂O is introduced by feldspar; Na ₂O is introduced by feldspar; LiO ₂Introduce by triphane; ZnO adopts industrial zinc oxide etc.

The white sand pot is pressed following technology manufacturing:

The above-mentioned raw materials weighing is good, and concerning base substrate, material, (grinding) ball, water ratio are 1: 1.6: 0.85, particle fineness, the surplus 6-9% of 10000-hole sieve; Water content is 19-20% to roll forming, and wheel is shaped to 23-24%, and injection forming is 30-32%.Concerning glaze, the glaze slip fineness, the surplus 0.03-0.05% of 10000-hole sieve, glaze slip proportion is controlled between the 1.30-1.32.

Technical process is:

Base substrate: picking of raw material → pulverizing or calcination → batching → ball milling be in small, broken bits → dehydration refining mud → moulding → drying → glazing → burn till.

Glaze: picking of raw material → batching → ball milling is in small, broken bits → and standby.

Used triphane among the present invention adopts thinner particle diameter, and like this, its surface-area increases, and surface energy raises.In the heating sintering process, solid state reaction will take place in triphane and other raw material under lower temperature, generate more low bulk crystal, and not only the coefficient of expansion is lower for this solid solution attitude crystal, and each thermotropism expansible difference is less, has relaxed various intercrystalline boundary stresses.Along with the raising of material fineness, the coefficient of expansion is more little, and intensity is high more, and the thermal-shock resistance of material is big more, and promptly thermostability better.

The white sand pot is reasonably controlled firing temperature in sintering process, the ceramic body density is increased, and solid state reaction is abundant, generates more low bulk crystal, and makes residual quartz reduce to minimum, and the result increases blank strength, Heat stability is good.But if temperature is too high,, fuse into a part of low bulk crystal in the glassy phase, cause strength degradation and thermostability variation though the base substrate density has increased.Therefore, its temperature should be controlled at 1280-1320 ℃ and is advisable.

To glaze thirty years of age, also to press principle of identity and handle, its temperature should be controlled between 1280-1320 ℃.

The present invention has added the mineral that contain MgO in starting material, do like this to reduce cost, and obtains the lithium silicate magnesia porcelain material of relatively low thermel expansion coefficient and higher-strength.

Several formulation Example of the present invention is:

Base substrate:

SiO ₂Al ₂O ₃Li ₂O CaO MgO K ₂O Na ₂O igloss

1 54.5 33.5 2.7 1.3 1.1 0.5 0.4 6

2 54.4 31.2 3.0 1.3 1.1 0.4 0.1 8.5

3 56.7 28.6 2.9 1.1 1.2 0.3 0.1 9.1

Glaze:

SiO ₂Al ₂O ₃CaO MgO K ₂O Na ₂O Li ₂O ZnO igloss

1 60.7 16.74 3.25 4.36 1.27 0.48 2.55 4.80 5.85

2 63.0 14.20 4.02 4.86 1.23 0.51 2.66 5.40 4.12

3 62.72 15.80 3.85 4.50 1.06 0.60 2.90 4.05 4.52

By the white sand pot that the present invention makes, pot body intensity height, glaze is smooth, can be used for stewing, boil, fry in shallow oil, fry, exploding under the various burning things which may cause a fire disaster, and water-intake rate is less than 10%, and thermal stability is better than usual production greatly, reaches a 600-20 ℃ of heat exchange and does not split.

Claims

1, a kind of cooking white sand pot of tool high thermal stability, it comprises pot and lid two portions, its material mainly is made up of Lithium Oxide 98min, aluminum oxide, silicon-dioxide and magnesium oxide etc., it is characterized in that the weight percent content of each component is:

A, base substrate:

SiO ₂： 54-62

Al ₂O ₃：27-34

Li ₂O： 2.6-3.0

CaO： 1-1.5

MgO： 0.9-1.2

K ₂O： 0.2-0.5

Na ₂O： 0.1-0.4

Igloss: 6-10

B, glaze:

SiO ₂： 60-67

Al ₂O ₃： 14-18

Li ₂O： 2.5-3.0

CaO： 3-5

MgO： 4-5.2

K ₂O： 1-2

Na ₂O： 0.4-0.8

ZnO： 4-6

Igloss: 4-6