CN117401984A - Lithium-free low-temperature ceramic sintering aid and preparation method and application thereof - Google Patents

Lithium-free low-temperature ceramic sintering aid and preparation method and application thereof Download PDF

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CN117401984A
CN117401984A CN202311342633.6A CN202311342633A CN117401984A CN 117401984 A CN117401984 A CN 117401984A CN 202311342633 A CN202311342633 A CN 202311342633A CN 117401984 A CN117401984 A CN 117401984A
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lithium
free low
sintering aid
ceramic
heating
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李飞宇
郭咏
李文适
严春杰
曹骏
姚文帅
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Hebei Champion Sanitary Ware Co ltd
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Hebei Champion Sanitary Ware Co ltd
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Abstract

The invention provides a lithium-free low-temperature ceramic sintering aid and a preparation method and application thereof, and relates to the technical fields of lithium-free low-temperature ceramic sintering aids and preparation methods and applications thereof. The lithium-free low-temperature ceramic sintering aid is prepared from quartz and Al 2 O 3 ，CaO，MgO，K 2 O，Na 2 O、B 2 O 3 And the like. The lithium-free low-temperature ceramic sintering aid realizes the preparation of the high-performance low-temperature sintering aid on the basis of not using lithium-containing raw materials, so that the cost of the sintering aid is reduced, a large continuous phase can be formed in the ceramic during the sintering process, the crystallization problem is avoided, the ceramic production energy consumption is reduced, and the ceramic production profit is improved.

Description

Lithium-free low-temperature ceramic sintering aid and preparation method and application thereof
Technical Field
The invention relates to the technical field of a lithium-free low-temperature ceramic sintering aid, a preparation method and application thereof, in particular to a lithium-free low-temperature ceramic sintering aid, and a preparation method and application thereof.
Background
Research shows that the addition of the low-temperature sintering auxiliary agent can effectively reduce the sintering temperature of the raw material ceramic powder, so that the low-temperature sintering auxiliary agent is widely applied to the field of ceramic manufacture at the present stage. The main function of the low-temperature sintering aid is to promote crystal growth during sintering, thereby reducing the sintering temperature of the ceramic.
However, the following problems are common in practical applications for lithium-containing low temperature sintering aids: (1) Because the grains grow too fast, the movement of grain boundaries and the growth of the grains are not coordinated, so that gaps among the grains are formed, crystallization occurs, and the performance of the material is reduced; (2) Chemical substances such as harmful gas and the like can be released in the use process, which is not beneficial to human health and environmental protection; (3) The water source and the soil are polluted in the waste discharge process, so that ecological balance is affected; (4) Along with the development and wide application of lithium resources, the price of lithium is continuously increased, and the cost of the lithium-containing low-temperature sintering auxiliary agent is greatly increased. Accordingly, there is a need to develop a new lithium-free low temperature ceramic sintering aid that replaces the conventional lithium-containing low temperature sintering aid to overcome the above-described problems.
Disclosure of Invention
In order to solve the problems, the invention provides a lithium-free low-temperature ceramic sintering aid, and a preparation method and application thereof. Compared with the traditional lithium-containing low-temperature sintering auxiliary agent, the lithium-free low-temperature ceramic sintering auxiliary agent realizes the preparation of the high-performance low-temperature sintering auxiliary agent on the basis of not using lithium-containing raw materials, reduces the cost of the sintering auxiliary agent, promotes the inside of the sintering auxiliary agent to form a large continuous phase in the ceramic sintering process, avoids the generation of crystallization problem, reduces the energy consumption of ceramic production and improves the ceramic production profit.
The lithium-free low-temperature ceramic sintering aid provided by the invention comprises the following raw materials in percentage by weight:
quartz 61%, al 2 O 3 8-10％，CaO 0.1-3％，MgO 0.1-2％，K 2 O 1-4％，Na 2 O 4-11％、B 2 O 3 10-15 wt% of the raw materialsThe sum of the ratios is 100%.
The invention also provides a preparation method of the lithium-free low-temperature ceramic sintering aid, which comprises the following steps: mixing the raw materials, stirring uniformly, and roasting.
Further, the roasting adopts a sectional heating and heat preservation process, and specifically comprises the following steps: heating from 20deg.C to 600deg.C at a heating rate of 3.2deg.C/min, maintaining for 20-50min, heating from 600deg.C to 920 deg.C at a heating rate of 3.2deg.C/min, heating from 920 deg.C to 1100 deg.C at a heating rate of 1.5deg.C/min, and maintaining for 100-150min.
Another object of the invention is to provide the application of the lithium-free low-temperature ceramic sintering aid, which comprises the following specific steps: and (3) crushing the lithium-free low-temperature ceramic sintering aid, sieving with a 80-120 mesh sieve, adding the crushed lithium-free low-temperature ceramic sintering aid into ceramic green body powder, uniformly mixing, adding a proper amount of water into the powder, ball-milling to obtain ceramic green body slurry, pouring the slurry into a mould to form a ceramic green body, drying the green body, sintering, and cooling to room temperature after sintering is completed to obtain a ceramic green body.
Further, the addition amount of the lithium-free low-temperature ceramic sintering aid is 1-5 wt% of the ceramic green body powder.
Further, the addition amount of the water is 40-45 wt% of the ceramic body powder.
Further, the roasting adopts a sectional heating and heat preservation process, and specifically comprises the following steps: heating from 20 ℃ to 600 ℃ at a heating rate of 3.2 ℃/min, preserving heat for 30min, heating from 600 ℃ to 920 ℃ at a heating rate of 3.2 ℃/min, heating from 920 ℃ to 1100 ℃ at a heating rate of 1.5 ℃/min, and preserving heat for 120min.
Further, the ball milling ratio is 1:10, the ball milling rotating speed is 50rpm/min, and the ball milling time is 2h.
Further, the drying temperature is 80 ℃ and the drying time is 24 hours.
Compared with the prior art, the invention has the beneficial technical effects that:
according to the invention, the content of sodium element in the sintering aid is increased, so that the sodium element can promote the crystal phase transformation of ceramic materials in the ceramic sintering process, and the sintering temperature of the ceramic is reduced;
the sintering aid can promote ceramic crystallization and obtain smaller-sized crystals, and improve the uniformity of crystal dispersion, thereby improving the mechanical properties of the ceramic;
the sintering aid can release sodium ions in the sintering process, promote the dispersion of ceramic particles and form oxide solid-phase reaction among raw material particles, avoid the problems of crystallization and the like, improve the sintering density of ceramic materials, and further improve the quality and the service life of the ceramic.
Drawings
The invention is further described with reference to the following description of the drawings.
FIG. 1 is an SEM image of a ceramic according to example 1 of the invention.
Detailed Description
The technical scheme provided by the invention is further described below by combining with the embodiment. The ceramic bodies used in the examples and comparative examples of the present invention were composed of the following components: siO (SiO) 2 67.02wt％，Al 2 O 3 26.94wt％，Fe 2 O 3 1.25 wt％，MgO 0.39wt％，CaO 1.06wt％，Na 2 O 0.61wt％，K 2 O 2.35wt％，TiO 2 0.38wt％。
Example 1
(1) Preparation of a lithium-free low-temperature ceramic sintering aid:
61wt% quartz, al 2 O 3 10 wt％，CaO 3wt％，MgO 2wt％，K 2 O 4wt％，Na 2 O5wt％、B 2 O 3 15wt% and uniformly stirring, then pouring the uniformly mixed raw materials into an alumina crucible, then placing the crucible into a muffle furnace, heating the muffle furnace from 20 ℃ to 600 ℃ at a heating rate of 3.2 ℃/min, preserving heat for 30min, heating the muffle furnace from 600 ℃ to 920 ℃ at a heating rate of 3.2 ℃/min, then heating the muffle furnace from 920 ℃ to 1100 ℃ at a heating rate of 1.5 ℃/min, preserving heat for 120min, and cooling to room temperature to obtain the lithium-free low-temperature ceramic sintering aid.
(2) Firing ceramics:
the prepared auxiliary agent lithium-free low-temperature ceramic sintering auxiliary agent is crushed and sieved by a 120-mesh sieve, then added into ceramic green body powder in a proportion of 1wt%, after the green body powder and the auxiliary agent are fully and uniformly mixed, the ceramic green body powder and the auxiliary agent are put into a 10L ball milling tank, water accounting for 43% of the green body mass is added, the whole is ball milled for 2 hours under the conditions that the ball ratio is 1:10 and the rotating speed is 50rpm/min, then poured into a gypsum grinding tool, the grinding tool is removed after solidification, a ceramic sample strip is put into an oven at 80 ℃ for drying for 24 hours, and the dried sample strip is put into a muffle furnace, and is cooled to room temperature after the sintering process of the lithium-free low-temperature ceramic sintering auxiliary agent is completed, so that a ceramic green body is obtained.
Example 2
(1) Preparation of a lithium-free low-temperature ceramic sintering aid:
61wt% quartz, al 2 O 3 10 wt％，CaO 3wt％，MgO 2wt％，K 2 O 4wt％，Na 2 O5wt％、B 2 O 3 15wt% and uniformly stirring, then pouring the uniformly mixed raw materials into an alumina crucible, then placing the crucible into a muffle furnace, heating the muffle furnace from 20 ℃ to 600 ℃ at a heating rate of 3.2 ℃/min, preserving heat for 30min, heating the muffle furnace from 600 ℃ to 920 ℃ at a heating rate of 3.2 ℃/min, then heating the muffle furnace from 920 ℃ to 1100 ℃ at a heating rate of 1.5 ℃/min, preserving heat for 120min, and cooling to room temperature to obtain the lithium-free low-temperature ceramic sintering aid.
(2) Firing ceramics:
the prepared auxiliary agent lithium-free low-temperature ceramic sintering auxiliary agent is crushed and sieved by a 120-mesh sieve, then added into ceramic green body powder in a proportion of 1.5wt%, after the green body powder and the auxiliary agent are fully and uniformly mixed, the ceramic green body powder is placed into a 10L ball milling tank, water accounting for 43% of the green body mass is added, the whole is ball milled for 2 hours under the conditions that the ball ratio is 1:10 and the rotating speed is 50rpm/min, then poured into a gypsum grinding tool, the grinding tool is removed after solidification, a ceramic sample strip is placed into an oven for drying for 24 hours at 80 ℃, the dried sample strip is placed into a muffle furnace, and the ceramic green body is obtained after the sintering is completed according to the sintering process of the lithium-free low-temperature ceramic sintering auxiliary agent.
Example 3
(1) Preparation of a lithium-free low-temperature ceramic sintering aid:
61wt% quartz, al 2 O 3 10 wt％，CaO 3wt％，MgO 2wt％，K 2 O 4wt％，Na 2 O5wt％、B 2 O 3 15wt% and uniformly stirring, then pouring the uniformly mixed raw materials into an alumina crucible, then placing the crucible into a muffle furnace, heating the muffle furnace from 20 ℃ to 600 ℃ at a heating rate of 3.2 ℃/min, preserving heat for 30min, heating the muffle furnace from 600 ℃ to 920 ℃ at a heating rate of 3.2 ℃/min, then heating the muffle furnace from 920 ℃ to 1100 ℃ at a heating rate of 1.5 ℃/min, preserving heat for 120min, and cooling to room temperature to obtain the lithium-free low-temperature ceramic sintering aid.
(2) Firing ceramics:
the prepared auxiliary agent lithium-free low-temperature ceramic sintering auxiliary agent is crushed and sieved by a 120-mesh sieve, then added into ceramic green body powder in a proportion of 2wt%, after the green body powder and the auxiliary agent are fully and uniformly mixed, the ceramic green body powder and the auxiliary agent are put into a 10L ball milling tank, water accounting for 43% of the green body mass is added, the whole is ball milled for 2 hours under the conditions that the ball ratio is 1:10 and the rotating speed is 50rpm/min, then poured into a gypsum grinding tool, the grinding tool is removed after solidification, a ceramic sample strip is put into an oven at 80 ℃ for drying for 24 hours, and the dried sample strip is put into a muffle furnace, and is cooled to room temperature after the sintering process of the lithium-free low-temperature ceramic sintering auxiliary agent is completed, so that a ceramic green body is obtained.
Example 4
(1) Preparation of a lithium-free low-temperature ceramic sintering aid:
61wt% quartz, al 2 O 3 10 wt％，CaO 3wt％，MgO 2wt％，K 2 O 4wt％，Na 2 O5wt％、B 2 O 3 15wt% and uniformly stirring, then pouring the uniformly mixed raw materials into an alumina crucible, then placing the crucible into a muffle furnace, heating the muffle furnace from 20 ℃ to 600 ℃ at a heating rate of 3.2 ℃/min, preserving heat for 30min, heating the muffle furnace from 600 ℃ to 920 ℃ at a heating rate of 3.2 ℃/min, then heating the muffle furnace from 920 ℃ to 1100 ℃ at a heating rate of 1.5 ℃/min, preserving heat for 120min, and cooling to room temperature to obtain the lithium-free low-temperature ceramic sintering aid.
(2) Firing ceramics:
the prepared auxiliary agent lithium-free low-temperature ceramic sintering auxiliary agent is crushed and sieved by a 120-mesh sieve, then added into ceramic green body powder in a proportion of 2.5wt%, after the green body powder and the auxiliary agent are fully and uniformly mixed, the ceramic green body powder is placed into a 10L ball milling tank, water accounting for 43% of the green body mass is added, the whole is ball milled for 2 hours under the conditions that the ball ratio is 1:10 and the rotating speed is 50rpm/min, then poured into a gypsum grinding tool, the grinding tool is removed after solidification, a ceramic sample strip is placed into an oven for drying for 24 hours at 80 ℃, the dried sample strip is placed into a muffle furnace, and the ceramic green body is obtained after the sintering is completed according to the sintering process of the lithium-free low-temperature ceramic sintering auxiliary agent.
Example 5
(1) Preparation of a lithium-free low-temperature ceramic sintering aid:
61wt% quartz, al 2 O 3 10 wt％，CaO 3wt％，MgO 2wt％，K 2 O 4wt％，Na 2 O5wt％、B 2 O 3 15wt% and uniformly stirring, then pouring the uniformly mixed raw materials into an alumina crucible, then placing the crucible into a muffle furnace, heating the muffle furnace from 20 ℃ to 600 ℃ at a heating rate of 3.2 ℃/min, preserving heat for 30min, heating the muffle furnace from 600 ℃ to 920 ℃ at a heating rate of 3.2 ℃/min, then heating the muffle furnace from 920 ℃ to 1100 ℃ at a heating rate of 1.5 ℃/min, preserving heat for 120min, and cooling to room temperature to obtain the lithium-free low-temperature ceramic sintering aid.
(2) Firing ceramics:
the prepared auxiliary agent lithium-free low-temperature ceramic sintering auxiliary agent is crushed and sieved by a 120-mesh sieve, added into ceramic green body powder in a proportion of 3wt%, after the green body powder and the auxiliary agent are fully and uniformly mixed, placed into a 10L ball milling tank, added with water accounting for 43% of the green body mass, and poured into a gypsum grinding tool after ball milling for 2 hours under the conditions that the ball ratio is 1:10 and the rotating speed is 50rpm/min, the grinding tool is removed after solidification, a ceramic sample strip is placed into an oven for drying for 24 hours at 80 ℃, the dried sample strip is placed into a muffle furnace, and the ceramic green body is obtained after the sintering process of the lithium-free low-temperature ceramic sintering auxiliary agent is completed, and is cooled to room temperature.
Example 6
(1) Preparation of a lithium-free low-temperature ceramic sintering aid:
61wt% quartz, al 2 O 3 10 wt％，CaO 3wt％，MgO 2wt％，K 2 O 4wt％，Na 2 O5wt％、B 2 O 3 15wt% and uniformly stirring, then pouring the uniformly mixed raw materials into an alumina crucible, then placing the crucible into a muffle furnace, heating the muffle furnace from 20 ℃ to 600 ℃ at a heating rate of 3.2 ℃/min, preserving heat for 30min, heating the muffle furnace from 600 ℃ to 920 ℃ at a heating rate of 3.2 ℃/min, then heating the muffle furnace from 920 ℃ to 1100 ℃ at a heating rate of 1.5 ℃/min, preserving heat for 120min, and cooling to room temperature to obtain the lithium-free low-temperature ceramic sintering aid.
(2) Firing ceramics:
the prepared auxiliary agent lithium-free low-temperature ceramic sintering auxiliary agent is crushed and sieved by a 120-mesh sieve, added into ceramic green body powder in a proportion of 3.5wt%, after the green body powder and the auxiliary agent are fully and uniformly mixed, placed into a 10L ball milling tank, added with water accounting for 43% of the green body mass, and poured into a gypsum grinding tool after ball milling for 2 hours under the conditions that the ball ratio is 1:10 and the rotating speed is 50rpm/min, the grinding tool is removed after solidification, a ceramic sample strip is placed into an oven for drying for 24 hours at 80 ℃, the dried sample strip is placed into a muffle furnace, and the ceramic green body is obtained after the sintering is completed according to the sintering process of the lithium-free low-temperature ceramic sintering auxiliary agent.
Example 7
(1) Preparation of a lithium-free low-temperature ceramic sintering aid:
61wt% quartz, al 2 O 3 10 wt％，CaO 3wt％，MgO 2wt％，K 2 O 4wt％，Na 2 O5wt％、B 2 O 3 15wt% and uniformly stirring, then pouring the uniformly mixed raw materials into an alumina crucible, then placing the crucible into a muffle furnace, heating the muffle furnace from 20 ℃ to 600 ℃ at a heating rate of 3.2 ℃/min, preserving heat for 30min, heating the muffle furnace from 600 ℃ to 920 ℃ at a heating rate of 3.2 ℃/min, then heating the muffle furnace from 920 ℃ to 1100 ℃ at a heating rate of 1.5 ℃/min, preserving heat for 120min, and cooling to room temperature to obtain the lithium-free low-temperature ceramic sintering aid.
(2) Firing ceramics:
the prepared auxiliary agent lithium-free low-temperature ceramic sintering auxiliary agent is crushed and sieved by a 120-mesh sieve, added into ceramic green body powder in a proportion of 4wt%, after the green body powder and the auxiliary agent are fully and uniformly mixed, placed into a 10L ball milling tank, added with water accounting for 43% of the green body mass, and poured into a gypsum grinding tool after ball milling for 2 hours under the conditions that the ball ratio is 1:10 and the rotating speed is 50rpm/min, the grinding tool is removed after solidification, a ceramic sample strip is placed into an oven for drying for 24 hours at 80 ℃, the dried sample strip is placed into a muffle furnace, and the ceramic green body is obtained after the sintering process of the lithium-free low-temperature ceramic sintering auxiliary agent is completed, and is cooled to room temperature.
Example 8
(1) Preparation of a lithium-free low-temperature ceramic sintering aid:
61wt% quartz, al 2 O 3 10 wt％，CaO 3wt％，MgO 2wt％，K 2 O 4wt％，Na 2 O5wt％、B 2 O 3 15wt% and uniformly stirring, then pouring the uniformly mixed raw materials into an alumina crucible, then placing the crucible into a muffle furnace, heating the muffle furnace from 20 ℃ to 600 ℃ at a heating rate of 3.2 ℃/min, preserving heat for 30min, heating the muffle furnace from 600 ℃ to 920 ℃ at a heating rate of 3.2 ℃/min, then heating the muffle furnace from 920 ℃ to 1100 ℃ at a heating rate of 1.5 ℃/min, preserving heat for 120min, and cooling to room temperature to obtain the lithium-free low-temperature ceramic sintering aid.
(2) Firing ceramics:
the prepared auxiliary agent lithium-free low-temperature ceramic sintering auxiliary agent is crushed and sieved by a 120-mesh sieve, added into ceramic green body powder in a proportion of 4.5wt%, after the green body powder and the auxiliary agent are fully and uniformly mixed, placed into a 10L ball milling tank, added with water accounting for 43% of the mass of the green body, and poured into a gypsum grinding tool after ball milling for 2 hours under the conditions that the ball ratio is 1:10 and the rotating speed is 50rpm/min, the grinding tool is removed after solidification, a ceramic sample strip is placed into an oven for drying for 24 hours at 80 ℃, the dried sample strip is placed into a muffle furnace, and the ceramic green body is obtained after the sintering is completed according to the sintering process of the lithium-free low-temperature ceramic sintering auxiliary agent.
Comparative example 1
The difference from example 1 is that: only ceramic firing is performed, and no lithium-free low-temperature ceramic sintering aid is added.
Comparative example 2
The difference from example 1 is that: ceramic firing was performed using a commercially available lithium-containing low temperature sintering aid, which was 5wt%.
Test example 1
The ceramic materials prepared in the examples of the present invention and comparative examples were prepared into samples of the same specification, and the strength, water absorption, flexibility and shrinkage of the samples were tested.
The test method is as follows:
flexural strength: after measuring the sample size and determining the span, the maximum force at break was recorded using a universal tensile machine test. The three-point flexural strength formula is: p=3×f×l/2×a×b 2
Wherein: p-flexural strength, MPa; f-maximum force, N; l-span, mm; a-width, mm; b-thickness, mm, reference standard: GB/T6569-2006;
water absorption rate: the dry weight of the sample is recorded as M1, the sample is put into distilled water to be boiled for 2 hours and soaked for 20 hours, and the weight after absorption is measured as M2;
the absorptivity calculation formula is: w= (M2-M1)/M1×100%
Wherein: w-absorptivity,%; m1-dry mass, g; m2-saturated water mass, g, reference standard: ASTM C373-88 (2006);
the standard thickness deformation test method comprises the following steps: suspending a 25cm multiplied by 2.3cm multiplied by 1cm sample strip in a muffle furnace at 1100 ℃ for firing, naturally bending the sample by gravity, measuring the thicknesses of different positions, taking an average value as S, and simultaneously measuring the vertical distance L between the bending vertex and the horizontal lines at two ends on a coordinate paper;
Wq＝L×S2/100
wherein Wq-bending height, mm; the vertical distance between the L-bending vertex and the horizontal lines at the two ends is cm; s-thickness mm; the bending height is 14-20mm, and the product is qualified;
shrinkage ratio: etching a 10cm long linear scratch on the surface of the unsintered ceramic sample strip, and measuring the length of the linear scratch on the surface of the sintered ceramic sample;
the shrinkage test formula is: ws= (10-I) ×100%
Wherein Ws-shrinkage,%; and I, the length after sintering is smaller than 9% in cm, and the shrinkage rate is qualified.
The detection results are as follows:
sequence number Flexural strength, mpa Water absorption rate, percent Bending height, mm Shrinkage percentage,%
Example 1 75.8 1.300 16.6 10.7
Example 2 70.1 0.450 16.3 10.1
Example 3 72.1 0.350 17.0 10.5
Example 4 74.1 0.410 16.9 10.8
Example 5 68.9 0.015 16.1 10.5
Example 6 71.9 0.035 16.5 10.6
Example 7 73.2 0.150 16.3 10.6
Example 8 73.9 0.270 16.8 10.1
Comparative example 1 53.2 0.350 17.2 11.2
Comparative example 2 72.8 0.17 16.9 9.5
The principles and embodiments of the present invention have been described herein with reference to specific examples, the description of which is intended only to assist in understanding the methods of the present invention and the core ideas thereof; also, it is within the scope of the present invention to be modified by those of ordinary skill in the art in light of the present teachings. In view of the foregoing, this description should not be construed as limiting the invention.

Claims (9)

1. The lithium-free low-temperature ceramic sintering aid is characterized by comprising the following raw materials in percentage by weight:
quartz 61%, al 2 O 3 8-10％，CaO 0.1-3％，MgO 0.1-2％，K 2 O 1-4％，Na 2 O 4-11％、B 2 O 3 10-15%, the sum of the weight percentages of the raw materials is 100%.
2. The method for preparing the lithium-free low-temperature ceramic sintering aid according to claim 1, wherein the method comprises the following steps: mixing the raw materials, stirring uniformly, and roasting.
3. The preparation method of the lithium-free low-temperature ceramic sintering aid according to claim 2, wherein the roasting adopts a sectional heating and heat preservation process, and specifically comprises the following steps: heating from 20deg.C to 600deg.C at a heating rate of 3.2deg.C/min, maintaining for 20-50min, heating from 600deg.C to 920 deg.C at a heating rate of 3.2deg.C/min, heating from 920 deg.C to 1100 deg.C at a heating rate of 1.5deg.C/min, and maintaining for 100-150min.
4. Use of a lithium-free low temperature ceramic sintering aid according to claim 1 in ceramic firing, characterized by the steps of: pulverizing the lithium-free low-temperature ceramic sintering aid, sieving with a 80-120 mesh sieve, adding into ceramic green body powder, uniformly mixing, adding a proper amount of water into the powder, ball milling to obtain ceramic green body slurry, pouring the slurry into a mould to form a ceramic green body, drying the green body, sintering, and cooling to room temperature to obtain the ceramic green body.
5. The use of a lithium-free low-temperature ceramic sintering aid according to claim 1, wherein the addition amount of the lithium-free low-temperature ceramic sintering aid is 1-5 wt% of the ceramic green body powder.
6. The use of a lithium-free low-temperature ceramic sintering aid according to claim 1, wherein the water is added in an amount of 40-45 wt% of the ceramic green body powder.
7. The application of the lithium-free low-temperature ceramic sintering aid in ceramic firing according to claim 1, wherein the firing adopts a sectional heating and heat preservation process, and specifically comprises the following steps: heating from 20deg.C to 600deg.C at a heating rate of 3.2deg.C/min, maintaining for 20-50min, heating from 600deg.C to 920 deg.C at a heating rate of 3.2deg.C/min, heating from 920 deg.C to 1100 deg.C at a heating rate of 1.5deg.C/min, and maintaining for 100-150min.
8. The use of a lithium-free low-temperature ceramic sintering aid according to claim 1, wherein the ball-milling ball ratio is 1:10, the ball-milling rotation speed is 50rpm/min, and the ball-milling time is 2h.
9. The use of a lithium-free low temperature ceramic sintering aid according to claim 1, wherein the drying temperature is 80 ℃ and the drying time is 24h.
CN202311342633.6A 2023-10-17 2023-10-17 Lithium-free low-temperature ceramic sintering aid and preparation method and application thereof Pending CN117401984A (en)

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