CN112321329A - Ceramic strengthening treatment method based on 3D printed - Google Patents
Ceramic strengthening treatment method based on 3D printed Download PDFInfo
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- CN112321329A CN112321329A CN202011344260.2A CN202011344260A CN112321329A CN 112321329 A CN112321329 A CN 112321329A CN 202011344260 A CN202011344260 A CN 202011344260A CN 112321329 A CN112321329 A CN 112321329A
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- 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
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- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/87—Ceramics
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- 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
- C04B41/5025—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 with ceramic materials
- C04B41/5031—Alumina
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- C—CHEMISTRY; METALLURGY
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- 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
- C04B41/5025—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 with ceramic materials
- C04B41/5035—Silica
Abstract
The invention belongs to a ceramic strengthening method, and particularly relates to a ceramic strengthening treatment method based on 3D printing, which comprises the steps of carrying out degreasing treatment on a formed green body subjected to ceramic 3D printing to prepare a degreased green body; sintering the degreased green body to obtain a ceramic body, and finally strengthening the ceramic body; wherein, the degreasing treatment comprises primary green body strengthening and green body degreasing, and the sintering treatment comprises secondary green body strengthening and green body sintering. The technical scheme can solve the problems of low strength and large shrinkage of the formed green body of the existing ceramic 3D printing after degreasing, thereby improving the reliability of ceramic post-treatment and increasing the success rate of the ceramic 3D printing technology, namely, increasing the yield of ceramic 3D printing products; and simultaneously, the strength of the ceramic product is also increased.
Description
Technical Field
The invention belongs to a ceramic strengthening method, and particularly relates to a ceramic strengthening treatment method based on 3D printing.
Background
Under the large environment of 3D printing intelligent manufacturing, ceramic 3D printing has various complex structures which are high in efficiency and cannot be completed by a traditional forming process, so that the complex structures have irreplaceable effects in the field of precision ceramics, and ceramic 3D printed products are well cited in the fields of aerospace, medical treatment, industrial manufacturing, decoration design and the like, so that the ceramic 3D printing technology rises rapidly. In order to adapt to the current 3D printing development trend, the ceramic 3D printing technology of various principles is rapidly developed, wherein SLA is the most representative of the technologies, however, due to the particularity of the ceramic material, there are some problems in the development process of the ceramic 3D printing technology, including insufficient strength of the ceramic product (the strength is tested by aviation standard) and insufficient precision and strength of the ceramic element due to improper ceramic post-treatment (degreasing and sintering); in addition, in the ceramic post-treatment process, ceramic materials are easy to crack and shrink, and are finally eliminated because high-quality products cannot be formed, namely the current situation of low yield is caused. Specifically, in the ceramic 3D printing technology, slurry formed by mixing ceramic powder, a liquid photosensitive resin monomer, a photoinitiator, a dispersant, an auxiliary agent and the like is generally used as a raw material, and on the premise of ensuring the printing technology, the content of the ceramic powder is often limited, so that the problems of low strength after ceramic degreasing, large shrinkage rate during sintering, low strength after sintering and easy cracking are caused, and further the 3D ceramic printing technology is low in success rate and difficult to meet the production requirement.
Disclosure of Invention
The invention provides a ceramic strengthening treatment method based on 3D printing, aiming at the development needs of a ceramic 3D printing technology, and solving the problems of low ceramic 3D printing strength, large shrinkage and difficult cleaning at present, so that the reliability of ceramic post-treatment is improved, the success rate of the ceramic 3D printing technology is increased, namely, the yield of ceramic 3D printing products is increased.
The purpose of the invention is realized by the following technical scheme:
a ceramic strengthening treatment method based on 3D printing comprises the steps of carrying out degreasing treatment on a formed green body subjected to ceramic 3D printing to obtain a degreased green body; and sintering the degreased green body to obtain a ceramic body, and finally strengthening the ceramic body. In order to facilitate the placement of the main green body (corresponding to the body portion later), and to prevent the main green body from being damaged during the moving process as much as possible, in the 3D printing process of the ceramic, a corresponding support structure (corresponding to the body support portion later) is generally printed at first at the bottom of the main green body to be printed, and therefore, the formed green body, the degreased green body, and the ceramic body all include the body portion and the body support portion. In the technical scheme, the ceramic body strengthening specifically comprises the following steps:
putting the ceramic body into container equipment filled with strengthening liquid I, vacuumizing the interior of the container equipment to 0.05-0.08 MP, and soaking the ceramic body in the strengthening liquid I for 10-40 min; further, the strengthening liquid I is one of silica sol, aluminum sol (the solid content is 15-25%) and ethyl silicate hydrolysate, preferably, the strengthening liquid I is alkaline silica sol or neutral silica sol, and the content of SiO2 in the strengthening liquid I is 20-40% w. In this step, vacuum soaking can reach the purpose of quick soaking, and the quick I entering of reinforcer liquid is the clearance of ceramic body, and wherein, reinforcer liquid I's effect lies in: on one hand, the sol solution particles are nano-scale particles, and the particles fill ceramic gaps after dehydration, so that the ceramic density is improved; on the other hand, the colloid can wrap the ceramic framework in a gel film form after dehydration, so that the ceramic strength is improved.
And step two, releasing the pressure inside the container equipment to normal pressure, and soaking the ceramic body in the strengthening liquid I for 20-60 min. The step is mainly to ensure that the ceramic achieves the effect of secondary soaking, so that the strengthening liquid I is more uniformly distributed in the ceramic.
And step three, taking the ceramic body out of the strengthening liquid I, and placing the ceramic body on a support of a fume hood for 30-60 min to naturally dry the ceramic body. The step is a transition step of the second step and the third step, and is mainly used for preventing the ceramic from cracking in the rapid water loss process.
And step four, controlling the temperature in the sintering furnace to be 80-150 ℃, placing the ceramic body in the sintering furnace for 60-90 min for heating and drying, and finally taking out the ceramic body and cooling the ceramic body to room temperature. In the step, the ceramic is dehydrated too fast due to overhigh temperature, so that the ceramic is cracked, and therefore, the optimal drying temperature is obtained in repeated experiments when the temperature in the sintering furnace is controlled to be 80-150 ℃.
And step five, after repeating the step one to the step four for 4-6 times, directly heating the temperature in the sintering furnace to 600-900 ℃ at the speed of 5-10 ℃/min without taking out the ceramic body from the sintering furnace for the last time, continuously placing the ceramic body in the sintering furnace for 30-90 min, and finally taking out the ceramic body to cool the ceramic body to room temperature, thereby completing the reinforcement of the ceramic body. In this step, the temperature is raised to 600-900 ℃, in order to sinter the ceramic again, through many tests, the high-temperature strength of the ceramic can be effectively improved through sintering again, specifically, as the colloid water loss is nano-scale particles, a small part of nano-particles can be liquefied through baking at 600-900 ℃, the degree of fit between the colloid particles and the framework is effectively improved, the high-temperature strength of the ceramic product is improved, and meanwhile, the nano-particles are liquefied, so that the framework density of the ceramic body is increased, the shrinkage rate of the ceramic body is reduced, that is, the low-temperature strength of the ceramic product is improved.
Further, the degreasing treatment comprises green body primary strengthening and green body degreasing; the green body is preliminarily strengthened:
step one, placing the formed green body into container equipment filled with the strengthening liquid I, vacuumizing the container to 0.05-0.08 MP, and soaking the formed green body in the strengthening liquid I for 10-40 min. In this step, the strengthening liquid I acts as: on one hand, the sol solution particles are nano-scale particles, and the particles fill gaps of the ceramic green body after dehydration, so that the density of the degreased green body is improved; on the other hand, residual resin of the green body is basically vaporized at the stage of 600-900 ℃ in the degreasing process, the strength of the green body is the lowest, colloid water loss is nano-scale particles, and the nano-particles generate liquid phase at the temperature of 600-900 ℃, so that the bonding strength of the green body is effectively improved, and smooth degreasing is guaranteed.
And step two, releasing the pressure inside the container equipment to normal pressure, and soaking the molded green body in the strengthening liquid I for 20-60 min. The step mainly realizes the function of secondary soaking of the formed green body, so that the strengthening liquid I is more uniformly distributed in the formed green body.
And step three, taking the formed green body out of the strengthening liquid I, and placing the formed green body on a fume hood support for naturally airing to finish primary strengthening of the green body. The purpose of natural drying is to prevent the formed green body from cracking due to rapid water loss.
Degreasing the green body: and (4) placing the formed green body subjected to the primary green body strengthening in a degreasing furnace for green body degreasing, and finishing degreasing treatment of the formed green body after the green body degreasing is finished to obtain the degreased green body. Specifically, in the process of degreasing the green body, the temperature in a degreasing furnace is controlled to be 800-1100 ℃, and the molded green body is placed in the degreasing furnace for 36-48 hours, so that the degreasing treatment of the molded green body is completed, and the degreased green body is prepared. Further: and in the green body degreasing process, vacuum degreasing, inert gas protection degreasing or nitrogen protection degreasing are adopted.
Further, the sintering treatment comprises secondary strengthening of a green body and sintering of the green body; secondary strengthening of the green body:
placing a degreased green body on a fume hood support, and primarily cleaning the degreased green body; specifically, after the green body is degreased, a large amount of dust particles are attached to the surface of the degreased green body, particularly, a large amount of embedded powder is attached to the surface of the degreased green body, so that the embedded powder on the surface of the degreased green body is cleaned by a writing brush, a bottle blowing or an ear washing ball.
Spraying a strengthening solution II on the surface of the degreased green body subjected to primary cleaning, and naturally curing the strengthening solution II on the surface of the degreased green body for 10-30 min to form a layer of strengthening film; further, the strengthening liquid II is one of novolac, acrylic varnish and high-performance varnish; it should be noted that the strengthening liquid II must be coated in the form of spray to prevent the body part and the body support part from sticking to each other. In the step, the degreased blank is easy to crack due to low strength, and the strengthening film can prevent the degreased blank from cracking due to local stress of the degreased blank.
Step three, secondary cleaning is carried out on the degreased green body, and a strengthening liquid II is sprayed on the joint surface of the body part and the body supporting part, so that the strengthening liquid II is naturally solidified for 10-30 min on the contact surface of the body part and the body supporting part to form a layer of strengthening film, and secondary strengthening of the green body is completed; specifically, the secondary cleaning is to clean the embedded powder on the joint surface of the body part and the body supporting part by using a writing brush, a bottle blowing or an ear washing ball;
sintering the green body: placing the degreased green body subjected to secondary strengthening of the green body in a sintering furnace for green body sintering, and completing sintering treatment of the degreased green body after the green body sintering is finished to obtain a ceramic body, wherein the porosity of the ceramic body is 30-45%; specifically, in the green body sintering process, the temperature in a sintering furnace is controlled to be 1000-1300 ℃, and the degreased green body is placed in the sintering furnace for 1-2 hours, so that the sintering treatment of the degreased green body is completed, and the ceramic body is prepared.
The beneficial effect that this technical scheme brought:
1) the strengthening method can simultaneously achieve the aims of high-temperature strengthening and low-temperature strengthening. Specifically, the technical scheme improves the fit degree of colloid particles and a framework and improves the high-temperature resistance strength of a ceramic product at high temperature by soaking and sintering the ceramic body for multiple times; meanwhile, the skeleton density of the ceramic product is increased, the porosity of the ceramic product is reduced, and the strength of the ceramic product at low temperature (specifically room temperature in the technical scheme) is improved.
2) The invention adopts multi-step strengthening, can effectively reduce the damage to the ceramic in the operation process and improve the success rate of ceramic production. And the strength of the final product is tested by adopting aviation standard, can reach 20-40 MP, and can meet the high-low temperature strength performance of ceramic products and effectively control the shrinkage rate.
Drawings
FIG. 1 is an overall flow diagram of the present solution;
FIG. 2 is a flow chart illustrating the ceramic body strengthening process of the present embodiment;
FIG. 3 is a flow chart of the degreasing process according to the present embodiment;
FIG. 4 is a flow chart of the sintering process according to the present embodiment.
Detailed Description
The invention is further described in the following with reference to the drawings and examples, but it should not be understood that the invention is limited to the examples below, and variations and modifications in the field of the invention are intended to be included within the scope of the appended claims without departing from the spirit of the invention.
Example 1
The embodiment discloses a ceramic strengthening treatment method based on 3D printing, which is a basic implementation scheme of the invention and comprises the steps of carrying out degreasing treatment on a formed green body subjected to ceramic 3D printing to obtain a degreased green body; sintering the degreased green body to obtain a ceramic body; and finally, strengthening the ceramic body. Wherein, shaping unburned bricks, degrease unburned bricks and ceramic body all include body portion and body supporting part, and the ceramic body is reinforceed specific step as follows:
putting the ceramic body into container equipment filled with strengthening liquid I, vacuumizing the interior of the container equipment to 0.05-0.08 MP, and soaking the ceramic body in the strengthening liquid I for 10-40 min;
step two, releasing the pressure inside the container equipment to normal pressure, and soaking the ceramic body in the strengthening liquid I for 20-60 min;
taking the ceramic body out of the strengthening liquid I, and placing the ceramic body on a fume hood support for 30-60 min to naturally dry the ceramic body;
controlling the temperature in the sintering furnace to be 80-150 ℃, placing the ceramic body in the sintering furnace for 60-90 min for heating and drying, and finally taking out the ceramic body and cooling the ceramic body to room temperature;
and step five, after repeating the step one to the step four for 4-6 times, directly heating the temperature in the sintering furnace to 600-900 ℃ at the speed of 5-10 ℃/min without taking out the ceramic body from the sintering furnace for the last time, continuously placing the ceramic body in the sintering furnace for 30-90 min, and finally taking out the ceramic body to cool the ceramic body to room temperature, thereby completing the reinforcement of the ceramic body.
Example 2
The embodiment discloses a ceramic strengthening treatment method based on 3D printing, which is a preferable embodiment of the invention, and specifically comprises the following steps of sequentially carrying out degreasing treatment, sintering treatment and ceramic body strengthening treatment on a formed green body, wherein the degreasing treatment comprises green body primary strengthening and green body degreasing:
green body primary strengthening:
step one, placing the formed green body into container equipment filled with strengthening liquid I, vacuumizing the container to 0.05-0.08 MP, and soaking the formed green body in the strengthening liquid I for 10-40 min; wherein the strengthening solution I is one of silica sol, aluminum sol and ethyl silicate hydrolysate;
step two, relieving the pressure inside the container equipment to normal pressure, and soaking the molded green body in the strengthening liquid I for 20-60 min;
taking the formed green body out of the strengthening liquid I, and placing the green body on a fume hood support to be naturally dried, so as to finish primary strengthening of the green body;
green body degreasing: placing the molded green body subjected to the primary green body strengthening in a degreasing furnace for green body degreasing, and finishing degreasing treatment of the molded green body after the green body degreasing is finished to obtain a degreased green body;
sintering treatment: and controlling the temperature in the sintering furnace to be 1000-1300 ℃, and placing the degreased green body in the sintering furnace for 1-2 hours to finish the sintering treatment of the degreased green body, so as to obtain the ceramic body.
The concrete steps of ceramic body strengthening are as follows:
step one, putting the ceramic body into container equipment filled with strengthening liquid I, vacuumizing the interior of the container equipment to 0.07MP, and soaking the ceramic body in the strengthening liquid I for 25 min;
step two, releasing the pressure in the container equipment to normal pressure, and soaking the ceramic body in the strengthening liquid I for 40 min;
taking the ceramic body out of the strengthening liquid I, and placing the ceramic body on a fume hood support for 40min to naturally dry the ceramic body;
fourthly, controlling the temperature in the sintering furnace to be 100 ℃, placing the ceramic body in the sintering furnace for 80min for heating and drying, and finally taking out the ceramic body and cooling the ceramic body to room temperature;
and step five, after repeating the step one to the step four for 5 times, directly heating the temperature in the sintering furnace to 700 ℃ at the speed of 8 ℃/min without taking out the ceramic body from the sintering furnace for the last time, continuously placing the ceramic body in the sintering furnace for 60min, and finally taking out the ceramic body to cool the ceramic body to room temperature, thereby completing the strengthening of the ceramic body.
Example 3
The embodiment discloses a ceramic strengthening treatment method based on 3D printing, which is a preferable embodiment of the invention, and specifically comprises the following steps of sequentially carrying out degreasing treatment, sintering treatment and ceramic body strengthening treatment on a formed green body, wherein the degreasing treatment comprises green body primary strengthening and green body degreasing:
green body primary strengthening:
step one, placing the formed green body into container equipment filled with strengthening liquid I, vacuumizing the container to 0.06MP, and soaking the formed green body in the strengthening liquid I for 30 min;
step two, releasing the pressure in the container equipment to normal pressure, and soaking the molded green body in the strengthening liquid I for 30 min;
taking the formed green body out of the strengthening liquid I, and placing the green body on a fume hood support to be naturally dried, so as to finish primary strengthening of the green body;
green body degreasing: and (3) placing the formed green body subjected to the primary green body strengthening in a degreasing furnace for green body degreasing, adopting inert gas for protection and degreasing, and finishing degreasing treatment of the formed green body after the green body degreasing is finished to obtain the degreased green body.
The sintering treatment comprises secondary strengthening of a green body and sintering of the green body, and comprises the following specific steps:
secondary strengthening of the green body:
placing a degreased green body on a fume hood support, and primarily cleaning the degreased green body;
spraying a strengthening solution II on the surface of the degreased green body subjected to primary cleaning, and naturally curing the strengthening solution II on the surface of the degreased green body for 10-30 min to form a layer of strengthening film;
step three, secondary cleaning is carried out on the degreased green body, and a strengthening liquid II is sprayed on the joint surface of the body part and the body supporting part, so that the strengthening liquid II is naturally solidified for 10-30 min on the contact surface of the body part and the body supporting part to form a layer of strengthening film, and secondary strengthening of the green body is completed;
sintering the green body: and placing the degreased green body subjected to secondary strengthening of the green body in a sintering furnace for green body sintering, and finishing sintering treatment of the degreased green body after the green body sintering is finished to obtain the ceramic body.
The concrete steps of ceramic body strengthening are as follows:
step one, putting the ceramic body into container equipment filled with strengthening liquid I, vacuumizing the interior of the container equipment to 0.06MP, and soaking the ceramic body in the strengthening liquid I for 25 min;
step two, releasing the pressure in the container equipment to normal pressure, and soaking the ceramic body in the strengthening liquid I for 35 min;
taking the ceramic body out of the strengthening liquid I, and placing the ceramic body on a support of a fume hood for 50min to naturally dry the ceramic body;
fourthly, controlling the temperature in the sintering furnace to be 120 ℃, placing the ceramic body in the sintering furnace for 70min for heating and drying, and finally taking out the ceramic body and cooling the ceramic body to room temperature;
and step five, after repeating the step one to the step four 4 times, directly heating the temperature in the sintering furnace to 800 ℃ at the speed of 5 ℃/min without taking out the ceramic body from the sintering furnace for the last time, continuously placing the ceramic body in the sintering furnace for 70min, and finally taking out the ceramic body to cool the ceramic body to room temperature, thereby finishing the strengthening of the ceramic body.
Example 4
The embodiment discloses a ceramic strengthening treatment method based on 3D printing, which is a preferable embodiment of the invention and comprises the steps of carrying out degreasing treatment on a formed green body subjected to ceramic 3D printing to obtain a degreased green body; sintering the degreased green body to obtain a ceramic body; and finally, strengthening the ceramic body. Wherein, shaping unburned bricks, degrease unburned bricks and ceramic body all include body portion and body supporting part, and wherein, degreasing treatment includes that the unburned bricks is tentatively reinforceed and the green bricks degrease, and concrete step is as follows:
green body primary strengthening:
step one, placing the formed green body into container equipment filled with strengthening liquid I, vacuumizing the container to 0.06MP, and soaking the formed green body in the strengthening liquid I for 30 min; wherein the strengthening solution I is alkaline silica sol or neutral silica sol, and the content of SiO2 in the strengthening solution I is 20-40% w;
step two, releasing the pressure in the container equipment to normal pressure, and soaking the molded green body in the strengthening liquid I for 30 min;
taking the formed green body out of the strengthening liquid I, and placing the green body on a fume hood support to be naturally dried, so as to finish primary strengthening of the green body;
green body degreasing: and controlling the temperature in the degreasing furnace to be 800-1100 ℃, creating an inert gas protection environment in the degreasing furnace, and placing the formed green body subjected to green body primary reinforcement in the degreasing furnace for 36-48 hours to finish the degreasing treatment of the formed green body to obtain the degreased green body.
The sintering treatment comprises secondary strengthening of a green body and sintering of the green body, and comprises the following specific steps:
secondary strengthening of the green body:
placing the degreased green body on a fume hood support, and cleaning the embedded powder on the surface of the degreased green body by using a brush pen, a brush, a bottle blowing bottle or an ear washing ball;
spraying a strengthening liquid II on the surface of the cleaned degreased green body, and naturally curing the strengthening liquid II on the surface of the degreased green body for 20min to form a layer of strengthening film; wherein the strengthening liquid II is one of novolac, acrylic varnish and high-performance varnish;
step three, cleaning the embedded powder on the joint surface of the body part and the body supporting part by using a writing brush, a bottle blowing or an ear washing ball, and spraying a strengthening liquid II on the joint surface of the body part and the body supporting part to naturally cure the strengthening liquid II on the contact surface of the body part and the body supporting part for 20min to form a layer of strengthening film, namely finishing the secondary strengthening of the green body;
sintering the green body: controlling the temperature in the sintering furnace at 1100 ℃, and placing the degreased green body in the sintering furnace for 1.5h to finish the sintering treatment of the degreased green body, thereby obtaining the ceramic body.
The concrete steps of ceramic body strengthening are as follows:
step one, putting the ceramic body into container equipment filled with strengthening liquid I, vacuumizing the interior of the container equipment to 0.06MP, and soaking the ceramic body in the strengthening liquid I for 25 min;
step two, releasing the pressure in the container equipment to normal pressure, and soaking the ceramic body in the strengthening liquid I for 35 min;
taking the ceramic body out of the strengthening liquid I, and placing the ceramic body on a support of a fume hood for 50min to naturally dry the ceramic body;
fourthly, controlling the temperature in the sintering furnace to be 120 ℃, placing the ceramic body in the sintering furnace for 70min for heating and drying, and finally taking out the ceramic body and cooling the ceramic body to room temperature;
and step five, after repeating the step one to the step four 4 times, directly heating the temperature in the sintering furnace to 800 ℃ at the speed of 10 ℃/min without taking out the ceramic body from the sintering furnace for the last time, continuously placing the ceramic body in the sintering furnace for 70min, and finally taking out the ceramic body to cool the ceramic body to room temperature, thereby finishing the strengthening of the ceramic body.
Claims (10)
1. A ceramic strengthening treatment method based on 3D printing comprises the steps of carrying out degreasing treatment on a formed green body subjected to ceramic 3D printing to obtain a degreased green body; sintering the degreased green body to obtain a ceramic body; shaping unburned bricks, degrease unburned bricks and ceramic body all include this body portion and body supporting part, its characterized in that: also comprises ceramic body strengthening;
strengthening the ceramic body:
putting the ceramic body into container equipment filled with strengthening liquid I, vacuumizing the interior of the container equipment to 0.05-0.08 MP, and soaking the ceramic body in the strengthening liquid I for 10-40 min;
step two, releasing the pressure inside the container equipment to normal pressure, and soaking the ceramic body in the strengthening liquid I for 20-60 min;
taking the ceramic body out of the strengthening liquid I, and placing the ceramic body on a fume hood support for 30-60 min to naturally dry the ceramic body;
controlling the temperature in the sintering furnace to be 80-150 ℃, placing the ceramic body in the sintering furnace for 60-90 min for heating and drying, and finally taking out the ceramic body and cooling the ceramic body to room temperature;
and step five, after repeating the step one to the step four for 4-6 times, directly heating the temperature in the sintering furnace to 600-900 ℃ at the speed of 5-10 ℃/min without taking out the ceramic body from the sintering furnace for the last time, continuously placing the ceramic body in the sintering furnace for 30-90 min, and finally taking out the ceramic body to cool the ceramic body to room temperature, thereby completing the reinforcement of the ceramic body.
2. The ceramic strengthening treatment method based on 3D printing as claimed in claim 1, characterized in that: the degreasing treatment comprises green body primary strengthening and green body degreasing;
the green body is preliminarily strengthened:
step one, placing the formed green body into container equipment filled with strengthening liquid I, vacuumizing the container to 0.05-0.08 MP, and soaking the formed green body in the strengthening liquid I for 10-40 min;
step two, relieving the pressure inside the container equipment to normal pressure, and soaking the molded green body in the strengthening liquid I for 20-60 min;
taking the formed green body out of the strengthening liquid I, and placing the green body on a fume hood support to be naturally dried, so as to finish primary strengthening of the green body;
degreasing the green body: and (4) placing the formed green body subjected to the primary green body strengthening in a degreasing furnace for green body degreasing, and finishing degreasing treatment of the formed green body after the green body degreasing is finished to obtain the degreased green body.
3. The ceramic strengthening treatment method based on 3D printing as claimed in claim 2, characterized in that: and in the green body degreasing process, inert gas is adopted for protection and degreasing.
4. The ceramic strengthening treatment method based on 3D printing as claimed in claim 2, characterized in that: in the process of degreasing the green body, the temperature in a degreasing furnace is controlled to be 800-1100 ℃, and the formed green body is placed in the degreasing furnace for 36-48 hours, so that the degreasing treatment of the formed green body is completed, and the degreased green body is prepared.
5. The ceramic strengthening treatment method based on 3D printing as claimed in claim 1 or 2, characterized in that: the strengthening liquid I is one of silica sol, aluminum sol and ethyl silicate hydrolysate.
6. The ceramic strengthening treatment method based on 3D printing as claimed in claim 1 or 2, characterized in that: the strengthening solution I is alkaline silica sol or neutral silica sol, and the content of SiO2 in the strengthening solution I is 20-40% w.
7. The ceramic strengthening treatment method based on 3D printing as claimed in claim 1, characterized in that: the sintering treatment comprises secondary strengthening of a green body and sintering of the green body;
secondary strengthening of the green body:
placing a degreased green body on a fume hood support, and primarily cleaning the degreased green body;
spraying a strengthening solution II on the surface of the degreased green body subjected to primary cleaning, and naturally curing the strengthening solution II on the surface of the degreased green body for 10-30 min to form a layer of strengthening film;
step three, secondary cleaning is carried out on the degreased green body, and a strengthening liquid II is sprayed on the joint surface of the body part and the body supporting part, so that the strengthening liquid II is naturally solidified for 10-30 min on the contact surface of the body part and the body supporting part to form a layer of strengthening film, and secondary strengthening of the green body is completed;
sintering the green body: and placing the degreased green body subjected to secondary strengthening of the green body in a sintering furnace for green body sintering, and finishing sintering treatment of the degreased green body after the green body sintering is finished to obtain the ceramic body.
8. The ceramic strengthening treatment method based on 3D printing as claimed in claim 7, characterized in that: the strengthening liquid II is one of phenolic varnish, acrylic varnish and high-performance varnish.
9. The ceramic strengthening treatment method based on 3D printing as claimed in claim 7, characterized in that: the preliminary cleaning is to clean the powder embedded on the surface of the degreased green body by using a brush pen, a brush, a bottle blowing or an ear washing ball; the secondary cleaning is to clean the powder embedded on the joint surface of the body part and the body supporting part by using a writing brush, a bottle blowing or an ear washing ball.
10. The ceramic strengthening treatment method based on 3D printing as claimed in claim 7, characterized in that: in the green body sintering process, the temperature in the sintering furnace is controlled to be 1000-1300 ℃, and the degreased green body is placed in the sintering furnace for 1-2 hours, so that the sintering treatment of the degreased green body is completed, and the ceramic body is prepared.
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