CN1724459A - Daily used reinforced ceramic and its preparation process - Google Patents
Daily used reinforced ceramic and its preparation process Download PDFInfo
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- CN1724459A CN1724459A CN 200510043897 CN200510043897A CN1724459A CN 1724459 A CN1724459 A CN 1724459A CN 200510043897 CN200510043897 CN 200510043897 CN 200510043897 A CN200510043897 A CN 200510043897A CN 1724459 A CN1724459 A CN 1724459A
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- reinforced ceramic
- porcelain
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- albite
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Abstract
A strengthened ceramic for daily purpose is proportionally prepared from albite, talc and clay. Its preparing process features sintering twice respectively at 1250-1350 deg. C and at 1100-1200 deg. C. Its advantages are fine quality, high whiteness, and high strength and thermal stability.
Description
Technical field
The present invention relates to a kind of daily used reinforced ceramic and preparation method thereof, belong to high-grade daily-use fine field.
Background technology
Strengthening porcelain is high-grade domestic ceramics in very great demand on the present domestic and international market.Its principal feature is the resistance to impact shock and the bending strength height of material, Heat stability is good.Strengthen ceramic products and be difficult for bumping the cut edge, suitable high-temperature sterilization, machine washing and microwave oven are rapidly heated.The high strength soft-paste had appearred in USSR (Union of Soviet Socialist Republics) in 1975; West Germany by adjusting composition, has improved 1 times to the intensity of domestic ceramics before nineteen eighty-three on the basis of ceramic three components; The research of Japan's nearly 50 tame ceramic companies input daily used reinforced ceramics in 1989, the intensity of the strength ratio tradition domestic ceramics of the reinforcement domestic ceramics of producing has improved 2～3 times.Datong District that China Taiwan produces strengthens porcelain, makes the intensity of domestic ceramics improve 1～2 times by adding aluminum oxide; China mainland successively has some R﹠D institutions and manufacturer's research and has produced the reinforcement domestic ceramics as a trial, has obtained good effect.
At present both at home and abroad the material of domestic ceramics has broad variety, and Development and Production mainly contains high alumina matter, high siliceous, steatite ceramic.
High-aluminum reinforced porcelain is to add the stupalith that the commercial alumina of 10～30wt% makes on traditional household china three-part system batching basis, bending strength height (reaching more than the 140Mpa), impelling strength is good, Heat stability is good, be to strengthen the porcelain leading product at present, but the porcelain body whiteness is poor, almost do not have transparence, and volume density is big and product cost is high.
High siliceous reinforcement porcelain is to be basic components with K2O (Na2O)-AL2O3-SiO2 three-part system, the ceramic that makes based on tiny and the quartzy crystalline phase that is evenly distributed, the porcelain body good transmittance, physical strength satisfies strengthens the porcelain requirement, but its firing range is narrow, degree of deformation is big, and thermostability is difficult to control.
Steatite ceramic is to be the daily-use fine of basic components with talcum-potassium felspar sand-clay ternary system, the whiteness height, and good transmittance, the bending strength height, but the firing range of porcelain body is very narrow, only is 15 ℃, and in strengthening the porcelain material, its firing range is the narrowest.In the actual sintered process, be easy to cause the porcelain base to cave in or be out of shape, so in actual production the methods that strengthen product thicknesses that adopt more, the distortion that solves product causes product " thick, stupid ".
Therefore, develop a kind of whiteness height, good transmittance, Heat stability is good, firing range high-grade daily used reinforced ceramic wide, structured shape and have great technology and economic implications.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of physical strength height, Heat stability is good, firing range wide, and the high-grade daily used reinforced ceramic of whiteness height, good transmittance.
Purpose of the present invention can be realized by following technical scheme:
Daily used reinforced ceramic of the present invention, its base substrate comprise components such as talcum, feldspar, clay class mineral, and wherein, used feldspar is an albite.
Described reinforcement porcelain base substrate mainly comprises following component: talcum 65.00-80.00% (mass percent, as follows), albite 5.00-20.00%, clay class mineral 5.00-20.00%.
Described reinforcement porcelain base substrate mainly comprises following component: talcum 70.00-75.00%, albite 5.00-15.00%, clay class mineral 10.00-20.00%.
Described reinforcement porcelain base substrate mainly comprises following chemical composition: SiO
260.00-75.00%, Al
2O
35.00-10.00%, CaO 0-1.50%, MgO 20.00-28.00%, K
2O 0-0.50%, Na
2O0.50-2.50%.
Described reinforcement porcelain base substrate mainly comprises following chemical composition: SiO
265.00-70.00%, Al
2O
35.00-8.00%, CaO 0-1.00%, MgO 21.00-25.00%, K
2O 0-0.50%, Na
2O0.50-1.50%.
In the microstructure of described reinforcement porcelain porcelain body, mainly comprise following crystalline phase component: former enstatite (MgOSiO
2) 95.00-100.00% and quartz (SiO
2) 0-5.00%.
In the described reinforcement porcelain base substrate, the main chemical composition of albite: K
2O+Na
2O content is not less than 8.50%, wherein K
2O content is not more than 1.50%.
During described reinforcement porcelain base substrate is formed, be added with the additive of 0-5.00% outward, this additive is the mixture of rhombspar, barium carbonate, Wingdale or one of them.
Described reinforcement porcelain blank accounts for the granulometric composition that is not more than 10um (micron) more than 90% by accumulative total percentage ratio.
Described reinforcement ceramic products adopts double-firing process, i.e. high temperature (1250-1350 ℃) biscuiting and low temperature (1100-1200 ℃) glaze firing process combined in preparation process; In high temperature biscuiting process, adopt reducing atmosphere to burn till.
The preparation technology of described reinforcement porcelain is as follows:
The preparation technology of biscuiting porcelain body: raw materials such as talcum, albite, clay class mineral, additive with the independent fine grinding of wet ball mill method, after every kind of raw material reaches described granulometric composition, are mixed according to the mass percent example of blank composition requirement, sieve, deironing, filter mud, thick pugging, old, concise mud, blank forming, (1250-1350 ℃ of high temperature biscuiting, reducing atmosphere), choose porcelain, being up to the standards promptly gets the biscuiting porcelain body;
The preparation technology of glaze burned product: adopt the glazing of low temperature frit glaze, 1100-1200 ℃ of low temperature glaze firing is chosen porcelain, being up to the standards promptly gets the glaze burned product.
This studies an anti-steatite ceramic K2O-MgO-Al2O3-SiO2 is that batching is formed, and adopting Na2O-MgO-Al2O3-SiO2 is feed proportioning system, is the main body fusing assistant with the albite.In the high temperature sintering process, though high-temperature liquid-phase quantity varies with temperature still more violent in the base substrate, but the high-temperature fusant that albite forms to a large amount of steatitic degradation productions--free quartz has extremely strong solvency action, cause the viscosity of high-temperature fusant in the base substrate very big, thereby offset the disadvantageous effect of the variation of amount of liquid phase the base substrate high temperature deformation; Simultaneously, cause almost not having in the porcelain body microstructure free quartzy existence, improved the physical strength and the thermostability of porcelain body greatly.
Therefore, in terms of existing technologies, the present invention strengthens porcelain and has outstanding feature:
1, firing range is wide, reaches 40 ℃.Firing range considerably beyond conventional talc porcelain (15 ℃).The product structured shape, the production complicacy reduces greatly, and the production difficulty is little, is easy to Industry Promotion.
2, the physical strength height reaches 240MPa, is the nearly twice of present daily used reinforced ceramic intensity.
3, Heat stability is good: a heat exchange of 240 ℃ → 20 ℃ water does not burst;
4, realized the twice firing of porcelain-like quality first, talcum matter has been strengthened porcelain bring up to high-grade level with porcelain.
5, product whiteness height (88%), good transmittance (＞40%, the 1mm thin slice), porcelain exquisiteness, glaze smoothness.
Embodiment
Embodiment 1:
A kind of reinforcement porcelain, its base substrate comprises following component: talcum 65% (mass percent, as follows), albite 18%, kaolin 10%, clay 7%.
Described base substrate chemical composition is: SiO
267.00%, Al
2O
38.19%, CaO 0.93%, MgO21.65%, K
2O 0.18%, Na
2O 1.66%.
The albite chemistry consists of in the described base substrate: SiO
273.45%, Al
2O
316.54%, CaO0.35%, MgO 0.15%, K
2O 0.50%, Na
2O 8.85%, loss on ignition 0.34%.
In the described porcelain body microstructure, the crystalline phase component is: former enstatite (MgOSiO
2) 100.00%.
Its production technique is as follows:
The preparation technology of biscuiting porcelain body: with talcum, albite, clay, the kaolin independent fine grinding of wet ball mill method, after every kind of raw material reaches described granulometric composition [the particle accumulative total percentage ratio that is not more than 10um (micron) accounts for more than 90%], mix, sieve according to the mass percent example of blank composition requirement, deironing, filter mud, thick pugging, old, concise mud, blank forming, high temperature biscuiting (1250 ℃, reducing atmosphere);
The preparation technology of glaze burned product: adopt the glazing of low temperature frit glaze, 1150 ℃ of low temperature glaze firing are chosen porcelain, being up to the standards promptly gets the glaze burned product.
Embodiment 2:
A kind of reinforcement porcelain, its base substrate comprises following component: talcum 70% (mass percent, as follows), albite 15%, kaolin 10%, clay 5%.
Described base substrate chemical composition is: SiO
266.58%, Al
2O
37.38%, CaO 0.94%, MgO23.20%, K
2O 0.14%, Na
2O 1.38%.
The albite chemistry consists of in the described base substrate: SiO
272.45%, Al
2O
316.24%, CaO0.35%, MgO 0.15%, K
2O 0.90%, Na
2O 9.45%, loss on ignition 0.46%
In the described porcelain body microstructure, the crystalline phase component is: former enstatite (MgOSiO
2) 98.00%, quartzy 2.00%.
Its production technique is as follows:
The preparation technology of biscuiting porcelain body: with talcum, albite, clay, the kaolin independent fine grinding of wet ball mill method, after every kind of raw material reaches described granulometric composition [the particle accumulative total percentage ratio that is not more than 10um (micron) accounts for more than 90%], mix, sieve according to the mass percent example of blank composition requirement, deironing, filter mud, thick pugging, old, concise mud, blank forming, high temperature biscuiting (1280 ℃, reducing atmosphere);
The preparation technology of glaze burned product: adopt the glazing of low temperature frit glaze, 1150 ℃ of low temperature glaze firing are chosen porcelain, being up to the standards promptly gets the glaze burned product.
Embodiment 3:
A kind of reinforcement porcelain, its base substrate comprises following component: talcum 75% (mass percent, as follows), albite 13%, kaolin 10%, clay 2%.
Described base substrate chemical composition is: SiO
266.14%, Al
2O
36.60%, CaO 0.93%, MgO24.69%, K
2O 0.09%, Na
2O 1.18%.
The albite chemistry consists of in the described base substrate: SiO
272.45%, Al
2O
316.24%, CaO0.35%, MgO 0.15%, K
2O 0.90%, Na
2O 9.43%, loss on ignition 0.46%
In the described porcelain body microstructure, the crystalline phase component is: former enstatite (MgOSiO
2) 97.00%, quartzy 3.00%.
Its production technique is as follows:
The preparation technology of biscuiting porcelain body: with talcum, albite, clay, the kaolin independent fine grinding of wet ball mill method, after every kind of raw material reaches described granulometric composition [the particle accumulative total percentage ratio that is not more than 10um (micron) accounts for more than 90%], mix, sieve according to the mass percent example of blank composition requirement, deironing, filter mud, thick pugging, old, concise mud, blank forming, high temperature biscuiting (1300 ℃, reducing atmosphere);
The preparation technology of glaze burned product: adopt the glazing of low temperature frit glaze, 1150 ℃ of low temperature glaze firing are chosen porcelain, being up to the standards promptly gets the glaze burned product.
Embodiment 4:
A kind of reinforcement porcelain, its base substrate comprises following component: talcum 80% (mass percent, as follows), albite 7%, kaolin 10%, clay 3%.
Described base substrate chemical composition is: SiO
265.79%, Al
2O
35.76%, CaO 0.99%, MgO26.37%, K
2O 0.07%, Na
2O 0.65%.
The albite chemistry consists of in the described base substrate: SiO
271.60%, Al
2O
316.15%, CaO0.26%, MgO 0.12%, K
2O 1.20%, Na
2O 10.34%, loss on ignition 0.33%
In the described porcelain body microstructure, the crystalline phase component is: former enstatite (MgOSiO
2) 95.00%, quartzy 5.00%.
Its production technique is as follows:
The preparation technology of biscuiting porcelain body: with talcum, albite, clay, the kaolin independent fine grinding of wet ball mill method, after every kind of raw material reaches described granulometric composition [the particle accumulative total percentage ratio that is not more than 10um (micron) accounts for more than 90%], mix, sieve according to the mass percent example of blank composition requirement, deironing, filter mud, thick pugging, old, concise mud, blank forming, high temperature biscuiting (1330 ℃, reducing atmosphere);
The preparation technology of glaze burned product: adopt the glazing of low temperature frit glaze, 1150 ℃ of low temperature glaze firing are chosen porcelain, being up to the standards promptly gets the glaze burned product.
Embodiment 5:
A kind of reinforcement porcelain, its base substrate comprises following component: talcum 75% (mass percent, as follows), albite 10%, kaolin 10%, clay 5% adds 2% rhombspar.
The albite chemistry consists of in the described base substrate: SiO
272.45%, Al
2O
316.24%, CaO0.35%, MgO 0.15%, K
2O 0.90%, Na
2O 9.45%, loss on ignition 0.46%
Its production technique is as follows:
The preparation technology of biscuiting porcelain body: with talcum, albite, clay, kaolin, the rhombspar independent fine grinding of wet ball mill method, after every kind of raw material reaches described granulometric composition [the particle accumulative total percentage ratio that is not more than 10um (micron) accounts for more than 90%], mix, sieve according to the mass percent example of blank composition requirement, deironing, filter mud, thick pugging, old, concise mud, blank forming, high temperature biscuiting (1280 ℃, reducing atmosphere);
The preparation technology of glaze burned product: adopt the glazing of low temperature frit glaze, 1150 ℃ of low temperature glaze firing are chosen porcelain, being up to the standards promptly gets the glaze burned product.
Embodiment 6:
A kind of reinforcement porcelain, its base substrate comprises following component: talcum 75% (mass percent, as follows), albite 10%, kaolin 10%, clay 5% adds 2% barium carbonate.
The albite chemistry consists of in the described base substrate: SiO
272.45%, Al
2O
316.24%, CaO0.35%, MgO 0.15%, K
2O 0.90%, Na
2O 9.45%, loss on ignition 0.46%
Its production technique is as follows:
The preparation technology of biscuiting porcelain body: with talcum, albite, clay, kaolin, the barium carbonate independent fine grinding of wet ball mill method, after every kind of raw material reaches described granulometric composition [the particle accumulative total percentage ratio that is not more than 10um (micron) accounts for more than 90%], mix, sieve according to the mass percent example of blank composition requirement, deironing, filter mud, thick pugging, old, concise mud, blank forming, high temperature biscuiting (1300 ℃, reducing atmosphere);
The preparation technology of glaze burned product: adopt the glazing of low temperature frit glaze, 1150 ℃ of low temperature glaze firing are chosen porcelain, being up to the standards promptly gets the glaze burned product.
Embodiment 7:
A kind of reinforcement porcelain, its base substrate comprises following component: talcum 75% (mass percent, as follows), albite 10%, kaolin 10%, clay 5% adds 2% Wingdale.
The albite chemistry consists of in the described base substrate: SiO
272.45%, Al
2O
316.24%, CaO0.35%, MgO 0.15%, K
2O 0.90%, Na
2O 9.45%, loss on ignition 0.46%
Its production technique is as follows:
The preparation technology of biscuiting porcelain body: with talcum, albite, clay, kaolin, the Wingdale independent fine grinding of wet ball mill method, after every kind of raw material reaches described granulometric composition [the particle accumulative total percentage ratio that is not more than 10um (micron) accounts for more than 90%], mix, sieve according to the mass percent example of blank composition requirement, deironing, filter mud, thick pugging, old, concise mud, blank forming, high temperature biscuiting (1300 ℃, reducing atmosphere);
The preparation technology of glaze burned product: adopt the glazing of low temperature frit glaze, 1150 ℃ of low temperature glaze firing are chosen porcelain, being up to the standards promptly gets the glaze burned product.
Claims (10)
1, a kind of daily used reinforced ceramic, its base substrate comprise talcum, feldspar, the mineral constituent of clay class, it is characterized in that, described feldspar is an albite.
2, daily used reinforced ceramic as claimed in claim 1 is characterized in that, described base substrate comprises the component of following mass percent: and talcum 65.00-80.00% (, as follows), albite 5.00-20.00%, clay class mineral 5.00-20.00%.
3, daily used reinforced ceramic as claimed in claim 2 is characterized in that, described base substrate comprises the component of following mass percent: talcum 70.00-75.00%, albite 5.00-15.00%, clay class mineral 10.00-20.00%.
4, daily used reinforced ceramic as claimed in claim 1 is characterized in that, described base substrate comprises the chemical composition of following mass percent: SiO
260.00-75.00%, Al
2O
35.00-10.00%, CaO0-1.50%, MgO 20.00-28.00%, K
2O 0-0.50%, Na
2O 0.50-2.50%.
5, daily used reinforced ceramic as claimed in claim 4 is characterized in that, described base substrate comprises the chemical composition of following mass percent: SiO
265.00-70.00%, Al
2O
35.00-8.00%, CaO0-1.00%, MgO 21.00-25.00%, K
2O 0.00-0.50%, Na
2O 0.50-1.50%.
6, daily used reinforced ceramic as claimed in claim 1 is characterized in that, described porcelain body microstructure comprises the crystalline phase component of following mass percent: former enstatite (MgOSiO
2) 95.00-100.00% and quartz (SiO
2) 0-5.00%.
7, daily used reinforced ceramic as claimed in claim 1 is characterized in that, the chemical composition of the mass percent of described albite: K
2O+Na
2O content is not less than 8.50%, wherein K
2O content is not more than 1.50%.
8, daily used reinforced ceramic as claimed in claim 1 is characterized in that, described base substrate is formed the additive that China and foreign countries are added with 0-5.00%, and this additive is the mixture of rhombspar, barium carbonate, Wingdale or one of them.
9, daily used reinforced ceramic as claimed in claim 1 is characterized in that, described blank accounts for the granulometric composition that is not more than 10um (micron) more than 90% by accumulative total percentage ratio.
10, the preparation method of daily used reinforced ceramic as claimed in claim 1 is characterized in that, in preparation process, adopts double-firing process, i.e. high temperature (1250-1350 ℃) biscuiting and low temperature (1100-1200 ℃) glaze firing process combined; In high temperature biscuiting process, adopt reducing atmosphere to burn till; Specifically may further comprise the steps:
The preparation technology of biscuiting porcelain body: with the independent fine grinding of wet ball mill method of raw materials such as talcum, albite, clay class mineral, additive, after every kind of raw material reaches described granulometric composition, mix, sieve according to the mass percent example of blank composition requirement, deironing, filter mud, thick pugging, old, concise mud, blank forming, the high temperature biscuiting is chosen porcelain, being up to the standards promptly gets the biscuiting porcelain body;
The preparation technology of glaze burned product: adopt the glazing of low temperature frit glaze, low temperature glaze firing is chosen porcelain, being up to the standards promptly gets the glaze burned product.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100438977A CN1330603C (en) | 2005-06-23 | 2005-06-23 | Daily used reinforced ceramic and its preparation process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100438977A CN1330603C (en) | 2005-06-23 | 2005-06-23 | Daily used reinforced ceramic and its preparation process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1724459A true CN1724459A (en) | 2006-01-25 |
| CN1330603C CN1330603C (en) | 2007-08-08 |
Family
ID=35924108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100438977A Expired - Fee Related CN1330603C (en) | 2005-06-23 | 2005-06-23 | Daily used reinforced ceramic and its preparation process |
Country Status (1)
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|---|---|
| CN (1) | CN1330603C (en) |
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| CN101429034B (en) * | 2008-12-02 | 2012-05-23 | 山东硅元新型材料有限责任公司 | Preparation method of high-surface-quality high-grade daily fine porcelain |
| CN102515536A (en) * | 2011-12-16 | 2012-06-27 | 廉江红星陶瓷企业有限公司 | Microcrystalline domestic ceramic prepared by talcum |
| CN103011766A (en) * | 2012-12-25 | 2013-04-03 | 青岛科技大学 | Magnesium-based daily-use fine porcelain blank body |
| CN103910521A (en) * | 2013-01-08 | 2014-07-09 | 湖南省美程陶瓷科技有限公司 | High-strength steatite porcelain |
| CN106518114A (en) * | 2016-11-15 | 2017-03-22 | 淄博工陶耐火材料有限公司 | Preparation method of ultra-low porosity, low-expansion rate clay fire resistant material |
| CN108569893A (en) * | 2018-07-05 | 2018-09-25 | 佛山市东鹏陶瓷有限公司 | A kind of high white light transmission ceramic tile and its manufacturing method |
| CN108675761A (en) * | 2018-07-04 | 2018-10-19 | 福建省德化县荣华陶瓷有限公司 | A kind of preparation method that the enviroment protective ceramic of thermally equivalent stews |
| CN111153679A (en) * | 2020-01-07 | 2020-05-15 | 湖南泰鑫瓷业有限公司 | Reinforced porcelain and preparation method thereof |
| CN111533548A (en) * | 2020-06-05 | 2020-08-14 | 广东创潮流瑜格科技有限公司 | Steatite porcelain |
| CN111606699A (en) * | 2020-06-04 | 2020-09-01 | 景德镇陶瓷大学 | Lightweight porous daily fine porcelain and preparation method thereof |
| CN111825437A (en) * | 2020-08-05 | 2020-10-27 | 广东四通集团股份有限公司 | Preparation method of high-thermal-stability and high-strength jade glaze domestic porcelain |
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| CN101429034B (en) * | 2008-12-02 | 2012-05-23 | 山东硅元新型材料有限责任公司 | Preparation method of high-surface-quality high-grade daily fine porcelain |
| CN102515536A (en) * | 2011-12-16 | 2012-06-27 | 廉江红星陶瓷企业有限公司 | Microcrystalline domestic ceramic prepared by talcum |
| CN103011766A (en) * | 2012-12-25 | 2013-04-03 | 青岛科技大学 | Magnesium-based daily-use fine porcelain blank body |
| CN103910521A (en) * | 2013-01-08 | 2014-07-09 | 湖南省美程陶瓷科技有限公司 | High-strength steatite porcelain |
| CN106518114A (en) * | 2016-11-15 | 2017-03-22 | 淄博工陶耐火材料有限公司 | Preparation method of ultra-low porosity, low-expansion rate clay fire resistant material |
| CN106518114B (en) * | 2016-11-15 | 2019-03-19 | 淄博工陶耐火材料有限公司 | The manufacture craft of ultralow-porosity, low thermal expansion fireclay refractory |
| CN108675761A (en) * | 2018-07-04 | 2018-10-19 | 福建省德化县荣华陶瓷有限公司 | A kind of preparation method that the enviroment protective ceramic of thermally equivalent stews |
| CN108569893A (en) * | 2018-07-05 | 2018-09-25 | 佛山市东鹏陶瓷有限公司 | A kind of high white light transmission ceramic tile and its manufacturing method |
| CN111153679A (en) * | 2020-01-07 | 2020-05-15 | 湖南泰鑫瓷业有限公司 | Reinforced porcelain and preparation method thereof |
| CN111606699A (en) * | 2020-06-04 | 2020-09-01 | 景德镇陶瓷大学 | Lightweight porous daily fine porcelain and preparation method thereof |
| CN111606699B (en) * | 2020-06-04 | 2023-01-24 | 景德镇陶瓷大学 | Lightweight porous daily fine porcelain and preparation method thereof |
| CN111533548A (en) * | 2020-06-05 | 2020-08-14 | 广东创潮流瑜格科技有限公司 | Steatite porcelain |
| CN111825437A (en) * | 2020-08-05 | 2020-10-27 | 广东四通集团股份有限公司 | Preparation method of high-thermal-stability and high-strength jade glaze domestic porcelain |
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| CN113429197A (en) * | 2021-07-27 | 2021-09-24 | 上饶市广丰区方正非矿开发有限公司 | High-strength magnesium jade porcelain and manufacturing method thereof |
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