High-performance pottery clay and manufacturing process thereof

Abstract

The invention discloses high-performance pottery clay which comprises the following components: zinc-rich, selenium-rich and iron-rich natural red and white clay produced in Jiuyuan country in the buried hill; stone powder; pottery clay; high crystal powder; and high-temperature clay. According to the high-performance pottery clay and the manufacturing process thereof, zero addition of spodumene is realized on the basis of ensuring the thermal shock resistance of ceramic utensils, so that the problems that a spodumene material needs to be added in the production of existing ceramic utensils, and the body health is influenced in the long-time cooking use process can be effectively solved. Zinc-rich, selenium-rich and iron-rich natural pottery clay is adopted as a raw material, a microstructure regulation and control and multi-layer composite technology is invented in a gradient design thinking mode, and the temperature field and stress field response capability of the pottery in an instantaneous strong thermal shock environment is improved by optimizing a firing curve.

Description

Technical Field

[0001] The invention relates to the technical field of pottery clay, in particular to high-performance pottery clay and a manufacturing process thereof. Background Art

[0002] At present, with the continuous improvement of people's living standards, and at the same time affected by the living environment factors, that is, most people buy commercial housing to live in, there are many inconveniences in daily life. For example, in terms of diet, in order to meet people's daily life needs, various cooking tools have emerged in an endless stream, among which ceramics have gradually become popular.

[0003] Since ceramic cooking tools can store very high heat for a certain period of time when in use, in order to ensure the thermal shock resistance of ceramic cooking tools, existing ceramic cooking tools are mostly produced by adding spodumene or coal slag, among which the proportion of refractory materials such as spodumene added is as high as 30-50%.

[0004] Although cooking utensils made of spodumene have their own advantages, such as high strength, durability, good heat preservation, uniform heating and not easy to burn the bottom, these advantages certainly cannot be ignored. Secondly, although the amount of lithium released by cooking utensils doped with spodumene under normal use usually does not cause significant effects on health, if they are heated at high temperatures for a long time or are damaged, it may lead to increased release of harmful substances.

[0005] As daily-use utensils, it is normal for cooking utensils containing spodumene to be slightly damaged or cooked for a long time. People will not discard them because of a small problem. At the same time, most people are not aware of the defects and problems of cooking utensils containing spodumene.

[0006] Therefore, in order to protect people's health, we propose a high-performance clay for making ceramic cooking utensils and a manufacturing process thereof to solve the above problems. Summary of the invention

[0007] The object of the present invention is to provide a high-performance clay and a manufacturing process thereof to solve the problems raised in the above background technology.

[0008] To achieve the above object, the present invention provides the following technical solutions:

[0009] A high-performance clay comprising the following components:

[0010] clay;

[0011] Red and white clay;

[0012] Stone powder;

[0013] High crystal powder;

[0014] High temperature clay.

[0015] Preferably, the clay is natural clay rich in zinc, selenium and iron, specifically natural pomfret clay.

[0016] A high-performance clay manufacturing process comprises the following steps:

[0017] Step 1: clay processing: natural Doumu clay and red and white clay are placed in a sunny place to age naturally for more than ten years, dried in the sun, and then ground and crushed to obtain clay powder;

[0018] Step 2: Additive treatment: grind the stone powder, high crystal powder and high temperature clay. The specific grinding degree should refer to the prepared clay powder and be as close to the clay powder as possible.

[0019] Step 3: Mixing the powder materials obtained in step 1 and step 2 according to a specific ratio, and then adding water to the mixture to stir and mix, so as to obtain a clay mixture;

[0020] Step 4: preparing clay, collecting the clay mixture obtained in step 3, adding water to it for 3 times, vacuuming it, and then cutting it into blocks to obtain clay blocks;

[0021] Step 5: Ceramic production: rolling the clay blocks obtained in step 4 and laminating them layer by layer to obtain a rough outline of the ceramic, and then trimming them with tools to obtain a ceramic clay blank;

[0022] Step six, firing and shaping, placing the ceramic clay blanks prepared in step five into a kiln for firing to obtain a formed ceramic product.

[0023] Preferably, in the mixing process in step three, the order and time of adding various raw materials are as follows: first add the clay and red clay with water and stir until it becomes viscous, then add the stone powder, high crystal powder and high temperature clay and continue to stir and mix deeply until the end.

[0024] Preferably, high crystal powder is added each time water is added during the refining process in step 4, on the one hand to adjust the ratio between solid and liquid, and on the other hand to ensure the content and location of high crystal powder in the clay.

[0025] Preferably, in the clay block used in step 4 and step 5, the high-crystalline powder portion is mainly distributed in the clay block or the entire layer of the ceramic clay blank.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] 1. This high-performance clay manufacturing process uses zinc-rich, selenium-rich and iron-rich natural clay as raw materials. With a gradient design thinking method, it invented microstructure regulation and multi-layer composite technology, and improved the temperature field and stress field response capabilities of pottery under instantaneous strong thermal shock environment by optimizing the firing curve.

[0028] 2. This high-performance clay achieves zero addition of spodumene while ensuring the thermal shock resistance of ceramic utensils. Therefore, it can effectively solve the problem that the existing production of ceramic utensils requires the addition of spodumene materials, which affects the health of the body during long-term cooking and use. DETAILED DESCRIPTION

[0029] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0030] The present invention provides a high-performance pottery clay and a manufacturing process technology solution thereof:

[0031] Embodiment 1:

[0032] A high-performance clay comprising the following components:

[0033] clay;

[0034] Red and white clay;

[0035] Stone powder;

[0036] High crystal powder;

[0037] High temperature clay.

[0038] Among them, the clay is natural clay rich in zinc, selenium and iron, specifically natural Doumu clay.

[0039] In the present embodiment, no additional additives are required during the production of the clay, that is, the spodumene that needs to be added in the production process in the prior art is not required. In this way, in the subsequent daily use, the problem of increased release of toxic substances due to damage to the cooking utensils or long-term high-temperature heating will not occur, and it can be used more safely and environmentally friendly, that is, it effectively solves the problem that a large amount of spodumene is added to ceramic cooking utensils in the prior art, which is prone to the release of toxic substances that affect health.

[0040] Embodiment 2:

[0041] A high-performance clay manufacturing process comprises the following steps:

[0042] Step 1: clay processing: natural Doumu clay and red and white clay are placed in a sunny place to age naturally for more than ten years, dried in the sun, and then ground and crushed to obtain clay powder;

[0043] Step 2: Additive treatment: grind the stone powder, high crystal powder and high temperature clay. The specific grinding degree should refer to the prepared clay powder and be as close to the clay powder as possible.

[0044] Step 3: Mixing the powder materials obtained in step 1 and step 2 according to a specific ratio, and then adding water to the mixture to stir and mix, so as to obtain a clay mixture;

[0045] Step 4: preparing clay, collecting the clay mixture obtained in step 3, adding water to it for 3 times, vacuuming it, and then cutting it into blocks to obtain clay blocks;

[0046] Step 5: Ceramic production: rolling the clay blocks obtained in step 4 and laminating them layer by layer to obtain a rough outline of the ceramic, and then trimming them with tools to obtain a ceramic clay blank;

[0047] Step six, firing and shaping, placing the ceramic clay blanks prepared in step five into a kiln for firing to obtain a formed ceramic product.

[0048] Among them, the order and time of adding various raw materials are as follows: first add clay and red clay with water and stir until it becomes viscous, then add stone powder, high crystal powder and high temperature clay and continue to stir and mix deeply until the end. The main purpose of adding clay and red clay first is to control the solid-liquid ratio of the whole mixture. The main purpose of the viscous state is to increase the adhesion of subsequent additives, that is, to ensure that the subsequent additives can be stably and firmly adhered to the mixture. More importantly, through the addition and use of red clay, the strength and structural stability of the entire clay can be further increased, ensuring the stability and safety performance in subsequent sintering and product use.

[0049] Among them, high-crystalline powder is added every time water is added during the refining process in step 4. On the one hand, it is to adjust the ratio between solid and liquid, and on the other hand, it is to ensure the content and existence position of high-crystalline powder in the clay. Adding high-crystalline powder in batches can increase the filling degree of high-crystalline powder in the clay, and at the same time, the high-crystalline powder can be distributed on all levels of the clay.

[0050] Among them, the clay block used in step 4 and step 5, the high crystal powder part is mainly distributed in the clay block or the whole layer of the ceramic clay. The addition of high crystal powder, and its full layer position in the ceramic clay, is mainly to use the crystal powder to adjust the sintering performance and microstructure of the ceramic, thereby improving the mechanical properties and thermal stability of the ceramic. In addition, the high crystal powder can also increase the mechanical strength and transparency of the ceramic body, and prevent the body from bending and deformation during firing.

[0051] In this embodiment, the entire production process first uses zinc-rich, selenium-rich and iron-rich natural clay as raw materials, which is cleaner and more environmentally friendly. Secondly, with a gradient design thinking method, microstructure regulation and multi-layer composite technology are invented, and the firing curve is optimized to improve the temperature field and stress field response capabilities of pottery under instantaneous strong thermal shock environment.

[0052] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0053] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high performance clay, characterized in that: Includes the following components: clay; Red and white clay; Stone powder; High crystal powder; High temperature clay.

2. The high-performance clay according to claim 1, characterized in that: The clay is natural clay rich in zinc, selenium and iron, specifically natural Doumu clay.

3. A high-performance clay manufacturing process, characterized in that: The following steps are involved: Step 1: clay processing: natural Doumu clay and red and white clay are placed in a sunny place to age naturally for more than ten years, dried in the sun, and then ground and crushed to obtain clay powder; Step 2: Additive treatment: grind the stone powder, high crystal powder and high temperature clay. The specific grinding degree should refer to the prepared clay powder and be as close to the clay powder as possible. Step 3: Mixing the powder materials obtained in step 1 and step 2 according to a specific ratio, and then adding water to the mixture to stir and mix, so as to obtain a clay mixture; Step 4: preparing clay, collecting the clay mixture obtained in step 3, adding water to it for 3 times, vacuuming it, and then cutting it into blocks to obtain clay blocks; Step 5: Ceramic production: rolling the clay blocks obtained in step 4 and laminating them layer by layer to obtain a rough outline of the ceramic, and then trimming them with tools to obtain a ceramic clay blank; Step six, firing and shaping, placing the ceramic clay blanks prepared in step five into a kiln for firing to obtain a formed ceramic product.

4. A high performance clay manufacturing process according to claim 3, characterized in that: In the mixing process in step three, the order and time of adding various raw materials are as follows: first add the clay and red and white glue with water and stir until it becomes viscous, then add the stone powder, high crystal powder and high temperature clay and continue to stir and mix deeply until the end.

5. The high-performance clay manufacturing process according to claim 3, characterized in that: In the step 4, high crystal powder is added every time water is added for refining. On the one hand, it is to adjust the ratio between solid and liquid, and on the other hand, it is to ensure the content and location of high crystal powder in the clay.

6. A high performance clay manufacturing process according to claim 3, characterized in that: The clay blocks used in step 4 and step 5 have high-crystalline powder portions mainly distributed throughout the clay blocks or the entire layer of the ceramic clay blank.