CN115180961A - Processing technology of ceramic body - Google Patents

Processing technology of ceramic body Download PDF

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Publication number
CN115180961A
CN115180961A CN202110372585.XA CN202110372585A CN115180961A CN 115180961 A CN115180961 A CN 115180961A CN 202110372585 A CN202110372585 A CN 202110372585A CN 115180961 A CN115180961 A CN 115180961A
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sintering
temperature
treatment
coating
ceramic body
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季成蹊
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Shanghai Art & Design Academy
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    • 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
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/51—Metallising, e.g. infiltration of sintered ceramic preforms with molten metal
    • C04B41/515—Other specific metals
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/85—Coating or impregnation with inorganic materials
    • C04B41/88—Metals

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Manufacturing & Machinery (AREA)
  • Powder Metallurgy (AREA)

Abstract

The invention provides a processing technology of a ceramic body, which comprises the steps of coating a coating on the surface of the ceramic body and then sintering to form a composite product. According to the processing technology of the ceramic body, the coating containing the metal particles is coated on the surface of the ceramic body, then sintering treatment is carried out, the sintering temperature used for the sintering treatment is controlled to be not higher than the biscuit firing temperature used for biscuit firing treatment and the critical melting temperature of the metal particles and not lower than the thermal decomposition temperature of the organic binder, so that the metal particles are fixed on the surface of the ceramic body after the organic binder is removed through the sintering treatment, the processing technology is simplified, and meanwhile, the organic binder in the coating is removed in the sintering treatment process, so that the process of aggregation and combination of the metal particles in the coating is beneficial to strengthening of the binding force between the metal particles and the surface of the ceramic body, and the yield of products is beneficial to improvement.

Description

Processing technology of ceramic body
Technical Field
The invention relates to the technical field of ceramic processing, in particular to a processing technology of a ceramic blank.
Background
The firmness of the coating of other types of constituent materials, such as metallic coatings, formed on the surface of ceramic articles is closely related to the processing technique after the coating of the surface of the ceramic articles. If the processing technology is not well controlled, the bonding force between the coating and the surface is weakened and the coating is easy to fall off from the ceramic surface, and the processing technology needs to be improved to improve the bonding strength between the surfaces of different materials.
Chinese patent application No. CN110981554a discloses a method for preparing a cermet coating, which comprises spraying a middle layer coating on the surface of a ceramic substrate, sintering, spraying a surface layer coating, and then performing secondary sintering to obtain a compact cermet outer layer. In the method, no matter the middle layer coating or the surface layer coating is adopted, in order to ensure the uniformity of each component in the coating, the rotating speed of 100-600 revolutions per minute is adopted for stirring, so that the uniformly mixed coating can easily generate bubbles. The method adopts a spraying method to avoid the influence of bubbles on the bonding force of the coating and the surface. However, the spraying method is limited in that it cannot build a coating effect of a more complicated pattern on the surface of the ceramic article.
Therefore, there is a need to provide a new processing technique for ceramic green bodies to solve the above problems in the prior art.
Disclosure of Invention
The invention aims to provide a processing technology of a ceramic blank, which is beneficial to constructing a coating effect with a complex pattern on the surface of a ceramic product and ensuring that the coating and the ceramic surface have good bonding force so as to improve the yield of products.
In order to achieve the purpose, the processing technology of the ceramic body comprises the following steps:
s1: providing a ceramic blank body and a coating, and carrying out biscuit firing treatment on the ceramic blank body to obtain a blank body to be processed;
s2: after cooling the blank to be processed, performing surface coating treatment on the blank to be processed by using the coating to obtain a composite blank;
s3: sequentially drying the composite green body and sintering the composite green body step by step at different sintering temperatures to obtain a composite product;
wherein the coating comprises a foam, and the components of the coating comprise metal particles and an organic binder;
and controlling the highest sintering temperature used in the step-by-step sintering treatment to be not higher than the bisque sintering temperature used for performing the bisque sintering treatment and the critical melting temperature of the metal particles and not lower than the thermal decomposition temperature of the organic binder.
The processing technology of the ceramic body has the beneficial effects that: the coating containing the metal particles is directly coated on the surface of the ceramic body without using a spraying process and even if the coating contains foam, so that a more complex pattern coating effect can be built on the surface of the ceramic product; the sintering treatment and the fractional sintering treatment at different sintering temperatures are sequentially carried out, the highest sintering temperature used by the fractional sintering treatment is controlled to be not higher than the biscuit firing temperature used for biscuit firing treatment and the critical melting temperature of the metal particles and not lower than the thermal decomposition temperature of the organic binder, so that the organic binder is removed and the metal particles are fixed on the surface of the ceramic blank, the processing technology is simplified, and meanwhile, the organic binder in the coating is removed in the sintering treatment process, so that the binding force between the metal particles in the blank and the ceramic blank is enhanced in the process of aggregation and binding, and the yield of products is improved.
Preferably, the difference between the critical melting temperature of the metal particles and the maximum sintering temperature is not less than 10 degrees celsius. The beneficial effects are that: the metal particles are prevented from being uncontrollable in shape due to obvious fluidity, and the product yield is improved.
Further preferably, the bisque firing temperature is 800-1100 ℃.
Further preferably, the highest sintering temperature of the step sintering process is not higher than 750 ℃.
Further preferably, the sintering process includes a first sintering process, and the first sintering process uses a first sintering temperature not exceeding 400 ℃.
Further preferably, the first sintering treatment includes heating from room temperature to the first sintering temperature at a heating rate of 0.5-2 degrees celsius/minute, and then sintering the composite blank at the first sintering temperature for not less than 7 hours.
Further preferably, the step-by-step sintering treatment further includes a second sintering treatment, the second sintering treatment is continued after the first sintering treatment is finished, and a second sintering temperature used in the second sintering treatment is higher than the first sintering temperature and is not higher than 600 ℃.
Further preferably, the second sintering treatment includes heating up to the second sintering temperature at a heating rate of 0.5-2 degrees celsius/minute from the first sintering temperature, and then sintering the composite green body at the second sintering temperature for 4-8 hours.
Further preferably, the step-by-step sintering treatment further includes a third sintering treatment, the third sintering treatment is performed after the second sintering treatment is finished, and a third sintering temperature used in the third sintering treatment is higher than the second sintering temperature and is not higher than 750 ℃.
Further preferably, the third sintering treatment includes heating to the third sintering temperature at a heating rate of 0.5-2 degrees celsius/minute from the second sintering temperature, and then sintering the composite green body at the third sintering temperature for 6-8 hours.
Further preferably, the step-by-step sintering treatment further includes a fourth sintering treatment, the fourth sintering treatment is performed after the third sintering treatment is finished, and a fourth sintering temperature used in the fourth sintering treatment is lower than the third sintering temperature and not lower than 200 ℃.
Further preferably, the fourth sintering treatment comprises cooling from the third sintering temperature to the fourth sintering temperature at a cooling rate of 0.1-0.4 degree centigrade per minute.
Preferably, the method further comprises a step S4, and in the step S4, the composite product is polished to obtain a composite finished product.
Preferably, the drying temperature used in the drying treatment is 20-250 ℃ to remove free water in the composite blank.
Preferably, the average particle size of the metal particles is not more than 100 microns, the mass percentage of the metal particles in the coating is 50-80, and the water content of the coating is not more than 10%.
Further preferably, in the step S2, the coating is coated on at least a part of the surface of the blank to be processed, so that the thickness of the coating layer formed on the surface of the blank to be processed is 2 to 6 micrometers.
Drawings
Fig. 1 is a flow chart of a processing process of the ceramic body according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. As used herein, the word "comprising" and similar words are intended to mean that the element or item preceding the word comprises the element or item listed after the word and its equivalent, but not the exclusion of other elements or items.
In view of the problems in the prior art, an embodiment of the present invention provides a processing technology of a ceramic blank, referring to fig. 1, including:
s1: providing a ceramic blank body and a coating, and carrying out biscuit firing treatment on the ceramic blank body to obtain a blank body to be processed;
s2: after cooling the blank to be processed, performing surface coating treatment on the blank to be processed by using the coating to obtain a composite blank;
s3: and sequentially drying the composite green body and sintering the composite green body step by step at different sintering temperatures to obtain a composite product.
In the embodiment of the invention, the ceramic body mainly comprises ceramic materials, and the coating comprises metal particles, organic binder and water.
Specifically, the coating is silver clay which is composed of silver powder, bismuth powder, an organic binder, grease and water.
In some embodiments of the present invention, the metal particles are mainly composed of the metal elementary substance in a free state, which does not exclude the possibility of doping the metal elementary substance with a compound
In some embodiments of the present invention, the free metal in the metal particles accounts for not less than 90% of the mass of the metal particles.
The normal temperature in the embodiment of the invention is 20-25 ℃.
In the coating according to some embodiments of the present invention, the metal particles are 50 to 80% by mass, and the water content of the coating is not higher than 10%. The water content is the mass percentage of water in the coating.
In some embodiments of the invention, the metal particles have an average particle size of no more than 100 microns. More particularly, the metal particles have an average particle size of from 2 to 100 microns.
Wherein, the average particle size of the metal particles and the mass percentage of the metal particles and the water in the coating are controlled, which is beneficial to the metal coating on the surface of the composite product formed subsequently to have controllable morphology.
If the mass percentage of the metal particles in the coating is too low or the average particle size of the metal particles is too low, the metal coating with a continuous form cannot be formed after the sintering treatment of the step S3; if the mass percentage of the metal particles in the coating is too high, or the average particle size of the metal particles is too high, the shape of the metal coating and even the bonding force between the coating and the ceramic surface can be affected.
If the water content in the coating is too high, the fluidity of the coating is enhanced, and the coating is not easy to shape in the processing process, so that the forming effect of the metal coating is influenced; if the water content of the coating is too low, moldability is poor and molding is difficult.
In some embodiments of the present invention, at normal temperature, the coating is taken, water is added, and the mixture is stirred until the coating presents foam, so that the coating contains the foam, and the liquid phase component is a homogeneous stable solution or suspension. According to the processing technology provided by the embodiment of the invention, defoaming treatment on the paint formed after stirring is not required.
The particle size in the embodiment of the present invention refers to the size of the particle, and specifically, a certain sphere diameter having the same behavior as the particle is used as the particle size of the particle. The average particle size in the embodiment of the invention is calculated by the corresponding particle size when the cumulative particle size distribution percentage of the sample reaches 50%. The specific calculation method is a conventional technical means of those skilled in the art, and is not described herein in detail.
In some embodiments of the present invention, the main component of the organic binder is sodium carboxymethyl cellulose.
In some embodiments of the present invention, the metal particles are any one of silver particles, copper particles and gold particles.
In step S1 of some embodiments of the present invention, the bisque firing temperature is controlled to 800 to 1100 ℃, so that the surface of the formed blank to be processed is compact and has no macroscopic defects such as cracks.
In the step S2 according to some embodiments of the present invention, the coating material is coated on at least a part of the surface of the blank to be processed, so that the thickness of the coating layer formed on the surface of the blank to be processed is 2-6 micrometers.
In embodiments 1 to 3 of the present invention, the ceramic body is a ceramic cup, the coating is purchased from shanghai chen imperial jewelry ltd, and the main component of the organic binder is sodium carboxymethyl cellulose. The method for coating the coating specifically comprises the step of coating along a designed pattern on the surface of the ceramic cup by using a soft brush.
The main composition types, mass percentage W, of the metal particles in the coating of examples 1-3 of the present invention 1 And average particle size D 1 And water in percentage by mass W 2 See table 1.
TABLE 1
Figure BDA0003009864280000061
Figure BDA0003009864280000071
In step S3 of some embodiments of the present invention, a maximum sintering temperature used in the sintering process is controlled to be not higher than a bisque sintering temperature used in the bisque sintering process and a critical melting temperature of the metal particles and not lower than a thermal decomposition temperature of the organic binder, so as to remove the organic binder through the sintering process.
The critical melting temperature in the embodiments of the present invention refers to a temperature at which the metal particles begin to melt.
Furthermore, even if the coating can deform in the sintering process due to the removal of the organic binder and the aggregation and combination among the metal particles, the coating also deforms in a shrinkage mode, and the shrinkage deformation is beneficial to strengthening the binding force between the coating formed by the aggregation and combination of the metal particles and the ceramic blank, so that the metal coating is prevented from falling off in the sintering process, and the product yield is further improved.
In some embodiments of the present invention, a difference between the critical melting temperature of the metal particles and the maximum sintering temperature is not lower than 10 ℃, so as to prevent the metal particles from having an uncontrollable morphology due to significant fluidity, and improve the yield of the product.
In the embodiments 1 to 3 of the present invention, since the coating contains water after being coated on the surface of the ceramic body, the composite body is dried at 20 to 250 ℃ to remove free water from the composite body, and then the composite body is sequentially dried and sintered step by step to obtain a composite product.
Specifically, the step-by-step sintering treatment comprises sintering treatment in different stages at different sintering temperatures, and the maximum sintering temperature of the sintering treatment is not higher than 750 ℃.
In the step S3 according to some embodiments of the present invention, the step-by-step sintering process is composed of a first sintering process, a second sintering process, a third sintering process, and a fourth sintering process, which are sequentially performed.
Specifically, the first sintering temperature used in the first sintering process is not more than 400 ℃. And the second sintering temperature used in the second sintering treatment is higher than the first sintering temperature and does not exceed 600 ℃. The third sintering process uses a third sintering temperature that is higher than the second sintering temperature and does not exceed 750 degrees celsius. And the fourth sintering temperature used in the fourth sintering treatment is lower than the third sintering temperature and is not lower than 200 ℃.
In some embodiments of the present invention, the first sintering process includes sintering the composite green body at the first sintering temperature for 7 to 9 hours after the temperature is raised from room temperature to the first sintering temperature at a heating rate of 0.5 to 2 degrees celsius per minute.
And the second sintering treatment comprises the step of sintering the composite blank at a second sintering temperature for 4 to 8 hours after the temperature is increased to the second sintering temperature from the first sintering temperature at a temperature increasing rate of 0.5 to 2 ℃ per minute.
And the third sintering treatment comprises the step of heating the composite green body to the third sintering temperature at a heating rate of 0.5-2 ℃ per minute from the second sintering temperature, and then sintering the composite green body for 6-8 hours at the third sintering temperature.
And the fourth sintering treatment comprises cooling to the fourth sintering temperature at a cooling rate of 0.1-0.4 ℃ per minute from the third sintering temperature.
In some embodiments of the present invention, after the fourth sintering process is completed, the resulting composite article is naturally cooled to room temperature.
Furthermore, in order to prevent adhesion and easily remove the formed composite product, silicone oil paper is padded on the bottom surface of the composite blank, and then the composite blank is placed into a heating device, wherein the heating device is any one of an electric cake file and a muffle furnace.
In step S3 of some embodiments of the present invention, the drying process is performed by a blower or natural air drying to remove free water from the composite body. Specifically, the temperature is not lower than 20 ℃ and not higher than 250 ℃ until the free water is removed.
In embodiments 1 to 3 of the present invention, both the drying treatment and the step-by-step sintering treatment were performed in a muffle furnace. In embodiment 2 of the present invention, since the metal particles are copper particles, the surface of the composite green body obtained after the drying treatment is covered with carbon powder to prevent oxidation.
In embodiment 1 of the present invention, the temperature of the composite green body obtained after the drying process is raised from the normal temperature to 400 ℃ in a muffle furnace to be used as a first sintering temperature, and the dried composite green body is sintered at 400 ℃ for 8 hours to complete the first sintering process.
The first sintering temperature in examples 2 and 3 of the present invention was 350 degrees celsius and 300 degrees celsius, respectively, and the sintering time at the first sintering temperature was 7 hours and 9 hours, respectively.
In embodiment 1 of the present invention, after the first sintering process is completed, the temperature is raised from 400 ℃ to 600 ℃ at a temperature rise rate of 0.5 ℃ per minute, and the temperature is used as a second sintering temperature, and then sintering is performed at 600 ℃ for 7 hours, so as to complete the second sintering process.
In the embodiments 2 and 3 of the present invention, the second sintering temperature was 550 degrees celsius and 500 degrees celsius, and the sintering time at the first sintering temperature was 6 hours and 8 hours, respectively. The heating rates were 0.5 degree centigrade/min and 1 degree centigrade/min, respectively.
In embodiment 1 of the present invention, after the second sintering process is completed, the temperature is raised from 600 degrees celsius to 750 degrees celsius at a temperature rise rate of 0.5 degrees celsius/minute as a third sintering temperature, and then sintering is performed at 750 degrees celsius for 6 hours to complete the third sintering process.
The third sintering temperatures in examples 2 and 3 of the present invention were 700 degrees celsius and 650 degrees celsius, respectively, and the sintering times at the first sintering temperature were 7 hours and 8 hours, respectively. The heating rates were 0.5 degree centigrade/min and 1 degree centigrade/min, respectively.
In embodiment 1 of the present invention, after the third sintering process is completed, the temperature is decreased from 750 ℃ to 200 ℃ at a rate of 0.1 ℃ per minute, and then the fourth sintering process is completed by sintering at 200 ℃ for 8 hours.
The fourth sintering temperatures in examples 2 and 3 of the present invention were 150 degrees celsius and 180 degrees celsius, respectively, and the sintering times at the fourth sintering temperature were 6 hours and 7 hours, respectively. The cooling rates were 0.1 degree Celsius/min and 0.3 degree Celsius/min, respectively.
After the composite product obtained in the embodiments 1 to 3 of the invention is cooled, compared with the corresponding ceramic blank, the volume shrinkage is less than 10%, the metal coating on the surface is distributed continuously and uniformly, and the phenomenon of dropping visible to naked eyes is not seen. Therefore, the finished product obtained by the processing technology of the surface of the ceramic body in the embodiment of the invention has high yield and can not generate serious deformation. Specifically, the cooling method is either natural cooling or water cooling.
In examples 1-3 of the present invention, the composite article was subjected to a sanding process to form a composite finished product.
Although the embodiments of the present invention have been described in detail hereinabove, it is apparent to those skilled in the art that various modifications and variations can be made to these embodiments. However, it is to be understood that such modifications and variations fall within the scope and spirit of the present invention as set forth in the following claims. Moreover, the invention as described herein is capable of other embodiments and of being practiced or of being carried out in various ways.

Claims (16)

1. A processing technology of a ceramic body is characterized by comprising the following steps:
s1: providing a ceramic blank body and a coating, and carrying out biscuit firing treatment on the ceramic blank body to obtain a blank body to be processed;
s2: after cooling the blank to be processed, performing surface coating treatment on the blank to be processed by using the coating to obtain a composite blank;
s3: sequentially drying the composite green body and sintering the composite green body step by step at different sintering temperatures to obtain a composite product;
wherein the coating comprises a foam, and the components of the coating comprise metal particles and an organic binder;
and controlling the highest sintering temperature used in the step-by-step sintering treatment to be not higher than the bisque sintering temperature used in the bisque sintering treatment and the critical melting temperature of the metal particles and not lower than the thermal decomposition temperature of the organic binder.
2. The process for manufacturing a ceramic body according to claim 1, wherein the difference between the critical melting temperature and the maximum sintering temperature of the metal particles is not less than 10 ℃.
3. The process for manufacturing a ceramic body according to claim 1, wherein the bisque firing temperature is 800 to 1100 ℃.
4. The process for manufacturing a ceramic body according to claim 3, wherein the maximum sintering temperature of the step-sintering process is not higher than 750 ℃.
5. The process for manufacturing a ceramic body according to claim 4, wherein the sintering treatment comprises a first sintering treatment using a first sintering temperature not exceeding 400 ℃.
6. A ceramic body processing technology as claimed in claim 5, wherein the first sintering treatment comprises sintering the composite body at the first sintering temperature for not less than 7 hours after the temperature is raised from room temperature to the first sintering temperature at a heating rate of 0.5-2 ℃ per minute.
7. The process for manufacturing a ceramic body according to claim 5, wherein the step-by-step sintering treatment further includes a second sintering treatment, the second sintering treatment is continued after the first sintering treatment is finished, and a second sintering temperature used in the second sintering treatment is higher than the first sintering temperature and is not more than 600 ℃.
8. The process for manufacturing a ceramic body according to claim 7, wherein the second sintering treatment comprises sintering the composite body at the second sintering temperature for 4 to 8 hours after the temperature is raised from the first sintering temperature to the second sintering temperature at a temperature raising rate of 0.5 to 2 degrees centigrade per minute.
9. The process for manufacturing a ceramic body according to claim 7, wherein the step-by-step sintering treatment further comprises a third sintering treatment, the third sintering treatment is performed after the second sintering treatment is finished, and a third sintering temperature used in the third sintering treatment is higher than the second sintering temperature and is not more than 750 ℃.
10. The process for manufacturing a ceramic body according to claim 9, wherein the third sintering treatment comprises sintering the composite body at the third sintering temperature for 6 to 8 hours after heating the composite body from the second sintering temperature to the third sintering temperature at a heating rate of 0.5 to 2 degrees celsius/minute.
11. The processing technology of a ceramic body according to claim 9, wherein the step-by-step sintering treatment further includes a fourth sintering treatment, the fourth sintering treatment is performed after the third sintering treatment is finished, and a fourth sintering temperature used in the fourth sintering treatment is lower than the third sintering temperature and not lower than 200 ℃.
12. The process for manufacturing a ceramic body according to claim 11, wherein the fourth sintering treatment comprises cooling from the third sintering temperature to the fourth sintering temperature at a cooling rate of 0.1 to 0.4 degrees celsius per minute.
13. The processing technology of the ceramic body according to claim 1, further comprising a step S4, wherein in the step S4, the composite product is polished to obtain a composite finished product.
14. The processing technology of the ceramic body as claimed in claim 1, wherein the drying temperature used in the drying treatment is 20-250 ℃ to remove free water from the composite body.
15. The processing technology of the ceramic body as claimed in claim 1, wherein the average particle size of the metal particles is not more than 100 micrometers, the mass percentage of the metal particles in the coating is 50-80%, and the water content of the coating is not more than 10%.
16. The processing technology of the ceramic body as claimed in claim 15, wherein in the step S2, the coating is applied to at least a part of the surface of the body to be processed, so that the thickness of the coating layer formed on the surface of the body to be processed is 2-6 μm.
CN202110372585.XA 2021-04-07 2021-04-07 Processing technology of ceramic body Withdrawn CN115180961A (en)

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CN202110372585.XA CN115180961A (en) 2021-04-07 2021-04-07 Processing technology of ceramic body

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Application publication date: 20221014