CN108863309B

CN108863309B - Preparation method of glazing-free white porcelain

Info

Publication number: CN108863309B
Application number: CN201810847124.1A
Authority: CN
Inventors: 蔡佩荣
Original assignee: Individual
Current assignee: Fujian Dehua Zhonghao Ceramics Co ltd
Priority date: 2016-06-23
Filing date: 2016-06-23
Publication date: 2021-08-24
Anticipated expiration: 2036-06-23
Also published as: CN105884335B; CN105884335A; CN108863309A

Abstract

The invention relates to a method for preparing ceramic, and provides a method for preparing glaze-free white porcelain, which omits the glazing step after firing, shortens the production period of products, particularly reduces the production cost, and simultaneously the prepared products keep the flatness and brightness of the surface of the ceramic product, and the appearance of the products still has the transparent and clean feeling similar to that after glazing treatment. The feed comprises the following raw materials in parts by weight: 52-54 parts of kaolin, 40-43 parts of potash-soda feldspar, 3-5 parts of quartz, 1-2 parts of talcum powder and 1750-1770 parts of water glass solution; the preparation method comprises the following steps: the raw materials are processed into a mud blank, and then the mud blank is gradually heated and fired from room temperature in a staged linear heating mode, wherein the heating curve of each stage of heating is y = k × P × t, y is the temperature ℃, P is the kiln power, t is the time min, and the value of the coefficient k is more than or equal to 0 and less than or equal to 1.

Description

Preparation method of glazing-free white porcelain

The application is a divisional application of patent application for inventing a preparation method of glazing-free white porcelain, wherein the application date of the original application is 2016-06-23, and the application number is 201610461510.8.

Technical Field

The invention relates to a preparation method of ceramic, in particular to a preparation method of glazing-free white porcelain.

Background

The preparation method of the ceramic product generally includes that a clay blank is fired firstly, then glaze is applied to the surface of the fired clay blank product to jointly form a modern high-brightness and smooth ceramic utensil, the German white porcelain is fine in product preparation, solid and dense in texture, glittering and translucent like jade, and the glaze is moist and grease-like, so that the German white porcelain has the names of ivory white, lard white, goose down white and the like, has unique style in a white porcelain system in China, the existing white porcelain preparation method is superior porcelain clay and special glaze which cannot be separated from the existing white porcelain preparation method to achieve the effect, however, the special glaze increases the working procedure and prolongs the preparation time while the surface of the porcelain achieves the expected effect, the production cost is increased, and the heavy metal content of the glaze is easy to cause the worry of modern people in daily ceramic utensils.

The invention patent of Chinese patent CN104058727B provides an antique natural color-forming porcelain, provides a method for manufacturing a ceramic product without glazing, solves the problem that the glaze in the prior art contains heavy metal, but the finished product has antique texture in color, does not have the white transparent sense of modern ceramics, especially German white porcelain, and has limited market audience.

Disclosure of Invention

Therefore, aiming at the content, the invention provides the preparation method of the glazing-free white porcelain, the glazing step after firing is omitted, the production period of the product is shortened, particularly the production cost is reduced, the prepared product keeps the flatness and brightness of the surface of the ceramic product, and the appearance of the product still has the transparent and clean feeling similar to that after glazing treatment.

In order to achieve the purpose, the invention is realized by the following technical scheme:

a preparation method of glazing-free white porcelain is characterized by comprising the following steps: the feed comprises the following raw materials in parts by weight: 50-55 parts of kaolin, 38-42 parts of potash feldspar, 3-5 parts of quartz and 1-2 parts of talcum powder;

the preparation method comprises the following steps: the raw materials are processed into a mud blank, and then the mud blank is gradually heated and fired from room temperature in a staged linear heating mode, wherein the heating curve of each stage of heating is y = k × P × t, y is the temperature ℃, P is the kiln power, t is the time min, and the value of the coefficient k is more than or equal to 0 and less than or equal to 1;

the kiln power is constant during firing, the temperature in the kiln can be set to gradually rise to the temperature y within the time t under the control of the coefficient k, and the temperature of the next stage is raised after the temperature y of the stage is reached; the temperature and time of each stage are specifically controlled as follows:

in the first stage, y = 390-410 ℃, t = 80-100 and k = 0.7;

in the second stage, y = 790-810 ℃, t = 80-100 and k = 0.9;

in the third stage, y = 1150-1170 ℃, t = 120-150, and k = 1;

in the fourth stage, y = 1270-1290 ℃, t = 100-150 min, and k = 1;

in the fifth stage, y = 1310-1330 ℃, t = 50-70, and k = 1;

in the sixth stage, y = 1311-1331 ℃, t = 8-15, and k = 1;

in the seventh stage, y = 1260-1280 ℃, t = 5-10, and k = 0.01;

in the eighth stage, y = 1260-1280 ℃, t = 50-80, and k = 1;

the further improvement is that: the raw materials comprise, by weight, 50-55 parts of Guangxi kaolin, 38-42 parts of Indonesian potash feldspar, 3-5 parts of Jiangxi quartz and 1-2 parts of Fujian talcum powder.

The further improvement is that: the feed comprises the following raw materials in parts by weight: 54 parts of Guangxi kaolin, 40 parts of Indonesian potassium-sodalite, 5 parts of Jiangxi quartz and 1 part of Fujian talcum powder.

The further improvement is that: and 1750-1770 parts by weight of water glass.

The further improvement is that: 1765 parts by weight of water glass solution is also included.

The further improvement is that: the method is characterized in that the raw materials are also treated before the staged linear temperature rise, and the treatment mode of the raw materials is as follows: mixing and stirring all the raw materials of kaolin, and grinding for 38 hours to obtain blank powder; sieving the blank powder with a 120-mesh sieve, and repeating for three times to obtain refined blank powder; removing iron; grouting to obtain slurry; injecting into a mold to form a mud blank.

The further improvement is that: the temperature rise condition of each stage of the staged linear temperature rise is as follows: the first phase y =400 ℃, t =90, k = 0.7; the second stage y =800 ℃, t is 90, and k = 0.9; the third stage y =1160 ℃, t is 140min, and k = 1; the fourth phase y =1280 ℃, t =120min, k = 1; a fifth phase y =1320 ℃, t =60, k = 1; the sixth stage y =1321 ℃, t =10, k = 1; a seventh stage y =1270 ℃, t =5, k = 0.01; the eighth phase y =1270 ℃, t =60, k = 1.

By adopting the technical scheme, the invention has the beneficial effects that: the invention relates to a preparation method of a glazing-free white porcelain, which is characterized in that only kaolin, potash feldspar, quartz and talcum powder are used for screening raw materials, a mud blank obtained after grinding and screening has less influence on the metal components and more silicon oxides to form a good firing foundation, and then the mud blank is fired by linear temperature rise under control to obtain the characteristics of firmness, compactness, smoothness, whiteness, fine and smooth surface like jade and good permeability.

Detailed Description

The following detailed description will be provided for the embodiments of the present invention with reference to specific embodiments, so that how to apply the technical means to solve the technical problems and achieve the technical effects can be fully understood and implemented.

Unless otherwise indicated, the techniques employed in the examples are conventional and well known to those skilled in the art, and the reagents and products employed are also commercially available. The source, trade name and if necessary the constituents of the reagents used are indicated at the first appearance.

The first embodiment of the invention:

a preparation method of glazing-free white porcelain comprises the following steps:

step one, raw materials in parts by weight are: 52 parts of kaolin, 43 parts of potash-soda feldspar, 3 parts of quartz and 2 parts of talcum powder by weight are mixed and stirred with 1765 parts of water glass solution by weight and then ground for 38 hours to obtain blank powder;

step two, sieving the blank powder with a 120-mesh sieve, and repeating for three times to obtain refined blank powder;

step three, removing iron from the refined blank powder treated in the step two;

step four, performing grouting treatment on the fine blank powder treated in the step three to obtain slurry;

step five, injecting the slurry into a mold to form a mud blank;

step six, gradually heating and firing the mud blank from room temperature through a staged linear heating curve y = kpt, wherein the process value of each stage is as follows:

in the first stage, y =390 ℃, t =90 and k =0.7 are used for drying the mud blank and removing moisture;

in the second stage, y =790 ℃, t is 90, k =0.9, preheating and firing are carried out, further temperature rise is carried out, and uniform heating of the mud blank is ensured; the third stage y =1150 ℃, t 140min, k = 1; the fourth phase y =1270 ℃, t =120min, k = 1; a fifth phase y =1310 ℃, t =60, k = 1; the firing makes the internal reaction of the mud blank mild, and is beneficial to forming transparent and clean feeling after the silicon oxide is fired;

a sixth phase y =1313 ℃, t =10, k = 1; the part between the mud blank and the bearing plate is burnt, and areas with inconsistent quality are not left;

the seventh stage y =1260 ℃, t =5, k = 0.01; the low-power cooling treatment ensures that the compact setting of the mud blank and the smooth and stable surface are kept; the eighth stage y =1260 ℃, t =60, k =1, finalizing;

and seventhly, naturally cooling to obtain the ceramic product.

Example two:

the preparation method comprises the following raw materials in parts by weight: 54 parts of Guangxi kaolin, 40 parts of Indonesian potassium-sodium feldspar, 5 parts of Jiangxi quartz and 1 part of Fujian talcum powder by weight are mixed with 1765 parts of water glass solution by weight and ground for 38 hours to obtain blank powder; sieving the blank powder with a 120-mesh sieve, and repeating for three times to obtain refined blank powder; removing iron; grouting to obtain slurry; injecting into a mold to form a mud blank.

The firing of the mud blank comprises the following steps:

in the first stage, y =350 ℃, t =90 and k =0.7 are used for drying the mud blank and removing moisture;

in the second stage, y =750 ℃, t is 90, k =0.9, preheating and firing are carried out, further temperature rise is carried out, and uniform heating of the mud blank is ensured; the third stage y =1100 ℃, t is 140min, and k = 1; the fourth phase y =1250 ℃, t =120min, k = 1; the fifth phase y =1300 ℃, t =60, k = 1; the firing makes the internal reaction of the mud blank mild, and is beneficial to forming transparent and clean feeling after the silicon oxide is fired;

the sixth stage y =1321 ℃, t =10, k = 1; the part between the mud blank and the bearing plate is burnt, and areas with inconsistent quality are not left;

a seventh stage y =1270 ℃, t =5, k = 0.01; the low-power cooling treatment ensures that the compact setting of the mud blank and the smooth and stable surface are kept; the eighth stage y =1270 ℃, t =60, k =1, finalize;

and seventhly, naturally cooling to obtain the ceramic product.

The Guangxi kaolin is a product which can be clearly purchased in the market in Guangxi province of China, the Indonesian potassium-sodalite is a product area in Indonesia Asian of China, the Jiangxi quartz is a product area in Jiangxi of China, and the Fujian talcum powder is a product area in Fujian of China.

The above description is only an embodiment utilizing the technical content of the present disclosure, and any modification and variation made by those skilled in the art can be covered by the claims of the present disclosure, and not limited to the embodiments disclosed.

Claims

1. A preparation method of glazing-free white porcelain is characterized by comprising the following steps: the feed comprises the following raw materials in parts by weight: 52-54 parts of kaolin, 40-43 parts of potash-soda feldspar, 3-5 parts of quartz, 1-2 parts of talcum powder and 1750-1770 parts of water glass solution;

in the first stage, y = 350-390 ℃, t = 80-100 and k = 0.7;

in the second stage, y = 750-790 ℃, t = 80-100, and k = 0.9;

in the third stage, y = 1100-1150 ℃, t = 120-150, and k = 1;

in the fourth stage, y = 1250-1270 ℃, t = 100-150 min, and k = 1;

in the fifth stage, y = 1300-1330 ℃, t = 50-70, and k = 1;

in the sixth stage, y = 1313-1331 ℃, t = 8-15, and k = 1;

in the seventh stage, y = 1260-1280 ℃, t = 5-10, and k = 0.01;

in the eighth stage, y = 1260-1280 ℃, t = 50-80, and k = 1;

the method is characterized in that the raw materials are also treated before the staged linear temperature rise, and the treatment mode of the raw materials is as follows: mixing and stirring the raw materials, and grinding for 38 hours to obtain blank powder; sieving the blank powder with a 120-mesh sieve, and repeating for three times to obtain refined blank powder; removing iron; grouting to obtain slurry; injecting into a mold to form a mud blank.

2. The method for preparing the glazing-free white porcelain according to claim 1, characterized in that: the feed comprises the following raw materials in parts by weight: 52 parts of kaolin, 43 parts of potash feldspar, 3 parts of quartz, 2 parts of talcum powder and 1765 parts of water glass solution.

3. The method for preparing the glazing-free white porcelain according to claim 2, characterized in that: the temperature rise condition of each stage of the staged linear temperature rise is as follows: the first phase y =390 ℃, t =90, k = 0.7; the second stage y =790 ℃, t is 90, k = 0.9; the third stage y =1150 ℃, t 140min, k = 1; the fourth phase y =1270 ℃, t =120min, k = 1; a fifth phase y =1310 ℃, t =60, k = 1; a sixth phase y =1313 ℃, t =10, k = 1; the seventh stage y =1260 ℃, t =5, k = 0.01; the eighth stage y =1260 ℃, t =60, k = 1.

4. The method for preparing the glazing-free white porcelain according to claim 1, characterized in that: the feed comprises the following raw materials in parts by weight: 54 parts of Guangxi kaolin, 40 parts of Indonesian potassium-sodalite, 5 parts of Jiangxi quartz, 1 part of Fujian talcum powder and 1765 parts of water glass solution.

5. The method for preparing the glazing-free white porcelain according to claim 4, wherein: the temperature rise condition of each stage of the staged linear temperature rise is as follows: the first phase y =350 ℃, t =90, k = 0.7; the second stage y =750 ℃, t is 90, and k = 0.9; the third stage y =1100 ℃, t is 140min, and k = 1; the fourth phase y =1250 ℃, t =120min, k = 1; the fifth phase y =1300 ℃, t =60, k = 1; the sixth stage y =1321 ℃, t =10, k = 1; a seventh stage y =1270 ℃, t =5, k = 0.01; the eighth phase y =1270 ℃, t =60, k = 1.