High-hardness synthetic fossil porcelain for daily use and production process thereof

Abstract

The invention relates to the technical field of ceramic materials, in particular to high-hardness synthetic fossil porcelain for daily use and a production process thereof. The production process comprises the following steps: step a, performing intermittent wet ball milling on raw materials, and sieving to obtain slurry; step b, carrying out compression molding to obtain a green body; c, drying at 80 DEG C for a period of time; and d, sintering, cooling, cutting and polishing to obtain the domestic porcelain. The domestic porcelain prepared by the process has excellent hardness and strength, the process is simple, the production cost is low, and industrial mass production is facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of ceramic materials, and in particular to a high-hardness synthetic fossil daily-use porcelain and a production process thereof. Background Art

[0002] The production process of daily-use porcelain mainly includes raw material process, molding process, decoration process and firing process. In the production process of daily-use porcelain, there are high requirements for the process. For example, high-temperature firing causes the shape of the vessel to change, and the size shrinkage will affect the designer's judgment of the product size. In the embryo molding process, dry pressing is the most commonly used. The raw materials are granulated and ball-milled, and then loaded into the mold for pressing and molding. This method can produce different shapes through different molds and pressure strengths.

[0003] As people's demand for daily-use ceramics continues to increase, modern daily-use ceramic production technology faces a series of major challenges, such as excessive energy consumption and waste in production; slow industrial innovation and overly traditional production methods of some products; the impact on the environment during the production process has also been a focus of attention, so there is a need to find more environmentally friendly production methods to reduce waste and waste of resources. Summary of the invention

[0004] In view of the problems existing in the background technology, the present invention provides a high-hardness synthetic fossil daily-use porcelain and a production process thereof, which is achieved through the following technical solutions: The following steps are involved: Step a: Add the raw materials in portions into a ball mill, then add deionized water into the ball mill, and perform intermittent wet ball milling. After the ball milling time is 4 to 5 hours, sieve to obtain slurry; Step b: placing the embryo into a mold and pressing it to obtain a green embryo; Step c: placing the green embryo at room temperature for 10 to 12 hours, and then drying it at 80°C for 8 to 10 hours; Step d: Place the dried green body in a kiln and sinter it at a set sintering temperature. After naturally cooling to room temperature in the kiln, take it out, cut and polish it, and finally obtain daily-use porcelain.

[0005] Preferably, the raw materials added in step a are calculated by weight: 35-42 parts of kaolin, 25-30 parts of clay, 10-15 parts of feldspar, 8-12 parts of cordierite, 5-9 parts of alumina, 4-9 parts of potassium feldspar, and 1-3 parts of a binder.

[0006] Preferably, the binder is polyvinyl alcohol.

[0007] Preferably, the specific method of intermittent ball milling in step a is: the speed of the first stage is set to 360 rpm, and the grinding is for 1 hour; the speed of the second stage is set to 480 rpm, and the grinding is for 2 hours; the speed of the third stage is set to 200 rpm, and the grinding is for 1 hour.

[0008] Preferably, the feed ratio in the ball mill is: ball: feed: water = 20:45:30.

[0009] Preferably, after ball milling in step a, the product is sieved through a 200-mesh sieve.

[0010] Preferably, the sintering in step d adopts low temperature fast sintering technology and is divided into three sintering stages: The first stage is calcined in nitrogen at a rate of 10-15°C / min from room temperature to 300-360°C for 0.5-1.5 hours; The second stage is calcined in nitrogen at a rate of 15-20°C / min from 300-360°C to 700-800°C for 2-3 hours; The third stage is calcined in nitrogen at a rate of 10-15°C / min from 700-800°C to 950-1050°C for 0.5-1 hour.

[0011] Compared with the prior art, the present invention provides a high-hardness synthetic fossil daily-use porcelain and its production process, which has the following beneficial effects: The daily-use porcelain produced by the production process of the present invention has excellent hardness and strength. The most important thing is that the production process adopts low-temperature fast firing technology in the sintering stage. Compared with the traditional high-temperature firing technology of ceramics, the sintering temperature of this technology is reduced by more than 80℃~100℃, and the firing time is significantly shortened, which helps to reduce the impact of temperature changes on porcelain during the firing process, reduce the possibility of cracking and deformation of the porcelain body, improve the structural properties of the porcelain body, and make the porcelain body have high density, high strength, high hardness, excellent adhesion and thermal stability. At the same time, this technology greatly reduces energy consumption and manufacturing costs, thereby reducing the emission of harmful gases such as carbon dioxide and oxides, which has positive significance for environmental protection. DETAILED DESCRIPTION

[0012] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0013] It should be noted that the experimental methods used in the implementation examples are all conventional methods unless otherwise specified; the materials, reagents, etc. used, unless otherwise specified, can be obtained from commercial channels.

[0014] In the present invention, unless otherwise specified, the numerical range "a-b" represents an abbreviation of any real number combination between a-b, where a and b are real numbers. For example, the numerical range "0-5" means that all real numbers between "0-5" are listed in this document, and "0-5" is just an abbreviation of these numerical combinations.

[0015] In the present invention, unless otherwise specified, all embodiments and preferred embodiments mentioned herein can be combined with each other to form a new technical solution.

[0016] In the present invention, unless otherwise specified, all the steps mentioned herein may be performed sequentially or randomly, but are preferably performed sequentially; for example, the method includes steps (a) and (b), which means that the method may include steps (a) and (b) performed sequentially, or may include steps (b) and (a) performed sequentially; for example, the method may further include step (c), which means that step (c) may be added to the method in any order, for example, the method may include steps (a), (b) and (c), or may include steps (a), (c) and (b), or may include steps (c), (a) and (b), etc.

[0017] In the present invention, unless otherwise specified, the specific numerical values ​​and specific substances in the embodiments of the present invention may be combined with other features of the description part of the present invention; for example, if the specification mentions that the reaction temperature is 10~100°C, and the embodiment mentions that the reaction temperature is 20°C, then it can be considered that the present invention has specifically disclosed the range of 10~20°C, or the range of 20~100°C, and this range can be combined with other features of the description part to form a new technical solution. Embodiment 1;

[0018] According to the weight components, 35 parts of kaolin, 30 parts of clay, 15 parts of feldspar, 8 parts of cordierite, 5 parts of alumina, 6 parts of potassium feldspar, and 1 part of binder are weighed, and the feeding ratio is aluminum ball: material: water = 20:45:30. Add them in the ball mill in sequence, and then add polyvinyl alcohol as a binder. First, set the speed to 360 rpm and grind for 1 hour; then set the speed to 480 rpm and grind for 2 hours; finally set the speed to 200 rpm, grind for 1 hour, and then pass through a 200 mesh sieve to obtain mud. Put the mud into a mold and press it into shape to make a green body to be sintered. The green embryo is placed at room temperature for 12 hours, then dried at 80°C for 10 hours, and then placed in a kiln and calcined in nitrogen at a rate of 15°C / min from room temperature to 300-360°C for 1.5 hours; then calcined in nitrogen at a rate of 15-20°C / min from 300-360°C to 700-800°C for 2-3 hours; finally calcined in nitrogen at a rate of 10-15°C / min from 700-800°C to 950-1050°C for 1 hour. After cooling naturally to room temperature in the furnace, take it out, cut and polish it, and finally obtain daily-use porcelain. Embodiment 2:

[0019] According to the weight components, 37 parts of kaolin, 26 parts of clay, 12 parts of feldspar, 9 parts of cordierite, 6 parts of alumina, 8 parts of potassium feldspar, and 2 parts of binder are weighed, and the feeding ratio is aluminum ball: material: water = 20:45:30. Add them in the ball mill in sequence, and then add polyvinyl alcohol as a binder. First, set the speed to 360 rpm and grind for 1 hour; then set the speed to 480 rpm and grind for 2 hours; finally set the speed to 200 rpm, grind for 1 hour, and then pass through a 200 mesh sieve to obtain mud. Put the mud into a mold and press it into shape to make a green body to be sintered. The green embryo is placed at room temperature for 10 hours, then dried at 80℃ for 10 hours, and the dried green embryo is placed in a kiln and calcined in nitrogen at a rate of 10~15℃ / min from room temperature to 300~360℃ for 1 hour; then calcined in nitrogen at a rate of 15~20℃ / min from 300~360℃ to 700~800℃ for 2 hours; finally calcined in nitrogen at a rate of 10~15℃ / min from 700~800℃ to 950~1050℃ for 1 hour. After cooling naturally to room temperature in the furnace, it is taken out, cut and polished, and finally daily-use porcelain is obtained. Embodiment three;

[0020] According to the weight components, 41 parts of kaolin, 29 parts of clay, 11 parts of feldspar, 8 parts of cordierite, 5 parts of alumina, 4 parts of potassium feldspar, and 2 parts of binder are weighed, and the feeding ratio is aluminum ball: material: water = 20:45:30. They are added to the ball mill in sequence, and then polyvinyl alcohol is added as a binder. First, the speed is set to 360 rpm and grind for 1 hour; then the speed is set to 480 rpm and grind for 2 hours; finally, the speed is set to 200 rpm, and after grinding for 1 hour, the slurry is passed through a 200-mesh sieve to obtain the slurry. The slurry is placed in a mold and pressed into a green body to be sintered. The green embryo is placed at room temperature for 11 hours, then dried at 80℃ for 10 hours, and then placed in a kiln and calcined in nitrogen at a rate of 10~15℃ / min from room temperature to 300~360℃ for 1 hour; then calcined in nitrogen at a rate of 15~20℃ / min from 300~360℃ to 700~800℃ for 3 hours; finally calcined in nitrogen at a rate of 10~15℃ / min from 700~800℃ to 950~1050℃ for 1 hour. After cooling naturally to room temperature in the furnace, take it out, cut and polish it, and finally obtain daily-use porcelain. Embodiment 4:

[0021] According to the weight components, 35 parts of kaolin, 27 parts of clay, 14 parts of feldspar, 12 parts of cordierite, 5 parts of alumina, 4 parts of potassium feldspar, and 3 parts of binder are weighed. The feeding ratio is aluminum ball: material: water = 20:45:30. Add them in the ball mill in sequence, and then add polyvinyl alcohol as a binder. First, set the speed to 360 rpm and grind for 1 hour; then set the speed to 480 rpm and grind for 2 hours; finally set the speed to 200 rpm, grind for 1 hour, and then pass through a 200 mesh sieve to obtain mud. Put the mud into a mold and press it into shape to make a green body to be sintered. The green embryo is placed at room temperature for 10 hours, then dried at 80℃ for 10 hours, and the dried green embryo is placed in a kiln and calcined in nitrogen at a rate of 10~15℃ / min from room temperature to 300~360℃ for 0.5 hours; then calcined in nitrogen at a rate of 15~20℃ / min from 300~360℃ to 700~800℃ for 2 hours; finally calcined in nitrogen at a rate of 10~15℃ / min from 700~800℃ to 950~1050℃ for 0.5 hours. After cooling naturally to room temperature in the furnace, it is taken out, cut and polished, and finally daily-use porcelain is obtained. Embodiment five;

[0022] According to the weight components, 37 parts of kaolin, 25 parts of clay, 13 parts of feldspar, 9 parts of cordierite, 9 parts of alumina, 6 parts of potassium feldspar, and 1 part of binder are weighed, and the feeding ratio is aluminum ball: material: water = 20:45:30. Add them in the ball mill in sequence, and then add polyvinyl alcohol as a binder. First, set the speed to 360 rpm and grind for 1 hour; then set the speed to 480 rpm and grind for 2 hours; finally set the speed to 200 rpm, grind for 1 hour, and then pass through a 200 mesh sieve to obtain mud. Put the mud into a mold and press it into shape to make a green body to be sintered. The green embryo is placed at room temperature for 10 hours, then dried at 80℃ for 10 hours, and the dried green embryo is placed in a kiln and calcined in nitrogen at a rate of 10~15℃ / min from room temperature to 300~360℃ for 0.5 hours; then calcined in nitrogen at a rate of 15~20℃ / min from 300~360℃ to 700~800℃ for 3 hours; finally calcined in nitrogen at a rate of 10~15℃ / min from 700~800℃ to 950~1050℃ for 0.5 hours. After cooling naturally to room temperature in the furnace, it is taken out, cut and polished, and finally daily-use porcelain is obtained. Embodiment six;

[0023] Wear resistance test Taking the existing common daily-use ceramic tiles as comparative example 1, the daily-use ceramic tiles prepared in the above embodiments 1 to 5 were subjected to a wear resistance test, and the test results are shown in Table 1.

[0024] Table 1

[0025] Embodiment seven; The bending strength test results are shown in Table 2.

[0026] Table 2

[0027] The above test results show that the wear resistance and bending strength of the daily-use ceramic tiles prepared by the method of the present invention are significantly higher than those of commercially available daily-use ceramic tiles.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A production process of high-hardness synthetic fossil daily-use porcelain, comprising the following steps: Step a: Add the raw materials in portions into a ball mill, then add deionized water into the ball mill, and perform intermittent wet ball milling. After the ball milling time is 4 to 5 hours, sieve to obtain slurry; Step b: placing the embryo into a mold and pressing it to obtain a green embryo; Step c: placing the green embryo at room temperature for 10 to 12 hours, and then drying it at 80°C for 8 to 10 hours; Step d: Place the dried green body in a kiln and sinter it at a set sintering temperature. After naturally cooling to room temperature in the kiln, take it out, cut and polish it, and finally obtain daily-use porcelain.

2. The production process of a high-hardness synthetic fossil daily-use porcelain according to claim 1, characterized in that: The raw materials added in step a are calculated by weight: 35-42 parts of kaolin, 25-30 parts of clay, 10-15 parts of feldspar, 8-12 parts of cordierite, 5-9 parts of alumina, 4-9 parts of potassium feldspar, and 1-3 parts of a binder.

3. The production process of a high-hardness synthetic fossil daily-use porcelain according to claim 2, characterized in that: The binder is polyvinyl alcohol.

4. The production process of a high-hardness synthetic fossil daily-use porcelain according to claim 1, characterized in that: The specific method of intermittent ball milling in step a is: the speed of the first stage is set to 360 rpm, and the grinding is carried out for 1 hour; the speed of the second stage is set to 480 rpm, and the grinding is carried out for 2 hours; the speed of the third stage is set to 200 rpm, and the grinding is carried out for 1 hour.

5. The production process of a high-hardness synthetic fossil daily-use porcelain according to claim 1, characterized in that: The feed ratio in the ball mill is: ball: material: Water = 20:45:

30.

6. The production process of a high-hardness synthetic fossil daily-use porcelain according to claim 1, characterized in that: Step a: After ball milling, pass through a 200-mesh sieve.

7. The production process of a high-strength synthetic fossil daily-use porcelain according to claim 1, characterized in that: The sintering in step d adopts low temperature fast sintering technology and is divided into three sintering stages: The first stage is calcined in nitrogen at a rate of 10-15°C / min from room temperature to 300-360°C for 0.5-1.5 hours; The second stage is calcined in nitrogen at a rate of 15-20°C / min from 300-360°C to 700-800°C for 2-3 hours; The third stage is calcined in nitrogen at a rate of 10-15°C / min from 700-800°C to 950-1050°C for 0.5-1 hour.

8. A high-hardness synthetic fossil daily-use porcelain, characterized in that: Prepared by the preparation method according to any one of claims 1 to 7.

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