CN107892482A - Low-melting glass glaze of low expansion ceramic inner bag back cover and its preparation method and application - Google Patents
Low-melting glass glaze of low expansion ceramic inner bag back cover and its preparation method and application Download PDFInfo
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- CN107892482A CN107892482A CN201711339534.7A CN201711339534A CN107892482A CN 107892482 A CN107892482 A CN 107892482A CN 201711339534 A CN201711339534 A CN 201711339534A CN 107892482 A CN107892482 A CN 107892482A
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- glass glaze
- inner bag
- ceramic inner
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C8/00—Enamels; Glazes; Fusion seal compositions being frit compositions having non-frit additions
- C03C8/14—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions
- C03C8/20—Glass frit mixtures having non-frit additions, e.g. opacifiers, colorants, mill-additions containing titanium compounds; containing zirconium compounds
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5022—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 vitreous materials
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/86—Glazes; Cold glazes
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Glass Compositions (AREA)
Abstract
The present invention relates to a kind of low-melting glass glaze of low expansion ceramic inner bag back cover and its preparation method and application, the low-melting glass glaze is mainly prepared by the raw material of following mass percent：Spodumene 26%~30%, petalite 2%~5%, alundum (Al2O3) 5%~8%, quartz sand 11%~15%, magnesia 15%~19%, boric anhydride 5%~8%, zirconium oxide 6%~10%, red lead 3%~6% and cerium oxide 2%~5%.The glass glaze has relatively low softening solidification temperature and the relatively low coefficient of expansion matched with low expansion ceramic inner bag simultaneously, so as to meet the requirement for low expansion ceramic inner bag back cover, it is durable in use and ablation caused by high temperature caused by various mode of heatings can be resisted, aging, come off and melt, and without leachable in glass glaze use, applicability is higher, outward appearance is brighter, water proof anti-soil performance is good, more health environment-friendly, avoid that organic coating and waterproofing agent come off in use or dissolution produces noxious material and can not be with applique, the problems such as agio bit line solidifies simultaneously, improve production efficiency.
Description
Technical field
The present invention relates to ceramic technology field, more particularly to a kind of low-melting glass of low expansion ceramic inner bag back cover
Glaze and its preparation method and application.
Background technology
With the improvement of people's living standards, more advocating green living healthy living, also more focus on taking care of health, thus kitchen tools
Comprehensive ceramic wind, ceramic chafing dish, ceramic saucepan, ceramic electric cooker, ceramic wok etc. has been swept increasingly by the common people to be liked.
At present, the mode of heating of ceramic chafing dish, ceramic saucepan, ceramic electric cooker etc. is mostly fixed jug with heating disk side
Formula, this direct heat transfer mode need ceramic liner bottom closely to be contacted very much with heat-generating disc, i.e., phase will be arranged at ceramic liner bottom
The flatness being a good.Ceramics are different from metallic article, have very big shrinkage ratio to cause into bottom after porcelain in ceramic liner sintering procedure
There is a certain degree of deformation in portion, it is necessary to polish bottom using grinding tool, and polish bottom will certainly cause outer surface of liner bottom without
Glaze, ceramic liner carcass is exposed, and the very high common glaze of softening solidification temperature can not be applied behind bottom again by grinding, it is so exposed
It is outer to be absorbed water without the protection of glaze layer without glaze carcass, inhale dirty, have a strong impact on the service life and aesthetic property of ceramic liner.
The content of the invention
Based on this, it is necessary to provide a kind of softening low expansion ceramic inner bag that solidification temperature is relatively low and the coefficient of expansion is relatively low envelope
The low-melting glass glaze at bottom.
A kind of low-melting glass glaze of low expansion ceramic inner bag back cover, mainly prepared by the raw material of following mass percent
Form：
In one of the embodiments, the softening temperature of the low-melting glass glaze is 700 DEG C~720 DEG C, solidification temperature
For 730 DEG C~770 DEG C, the coefficient of expansion is 24 × 10-7/ DEG C~29 × 10-7/℃。
Present invention also offers a kind of preparation method of the low-melting glass glaze of above-mentioned low expansion ceramic inner bag back cover, bag
Include following steps：
Each raw material is weighed by above-mentioned mass percent；
The raw material is mixed after 1420 DEG C~1450 DEG C to be melting into glass and regrind glass glaze powder is made；
Glaze slip is made in the glass glaze powder and produces the low-melting glass glaze.
Present invention also offers a kind of low-melting glass glaze of above-mentioned low expansion ceramic inner bag back cover in low expansion ceramic
Application in inner bag back cover, comprises the following steps：The bottom of low expansion ceramic inner bag is polished so that in the low expansion ceramic
The carcass of courage is exposed, then by the low-melting glass glaze silk-screen in the bottom of the low expansion ceramic inner bag, then cured kiln
It is secondary to soften and be solidified into glass glaze.
Or ceramic liner selection of the industry at present for this mode of heating does not grind the mode at bottom and causes the efficiency of heating surface poor
The problem of, either selection grinds the mode not handled behind bottom and causes water suction to inhale the problem of dirty, or selection is with waterproofing agent or has
The mode of the bottom outer surface for the low expansion ceramic inner bag that organic coating etc. is gone to seal after polishing.But waterproofing agent not heatproof intolerant to
Long, organic coating is also easy to fall off and bottom needs blast face to handle, and waterproofing agent and organic coating can not with pictorial trademark,
The cured kiln solidification together of the applique such as waterline drawing paper, need to individually be handled, thus work consuming time consumption and energy consumption.The present invention breaches tradition
Research thinking limitation, there is provided a kind of low-melting glass glaze of low expansion ceramic inner bag back cover, using low swollen on formula
Swollen height vitreous design, wherein each component have its specific function respectively, and lithium helps to reduce the coefficient of expansion, so introducing lithium brightness
Stone, but amount can excessively cause the secondary softening temperature of glass dust founded too high, and amount is too low can not to ensure low bulk, so simple lithium
Pyroxene can not balance each requirement, introduce magnesia as regulation, then coordinate a certain amount of zirconium oxide to help to reach required expansion
Coefficient；Boric anhydride is that glassy state forms material with quartz sand, makes its height vitreous；Red lead helps to reduce the softening temperature of glass dust,
But the coefficient of expansion can be also improved, thus is also contradiction face；Ceria is that total conditioning agent plays catalyst, glass fining agent,
And glass fining agent is made instead of traditional arsenic oxide arsenoxide using cerium oxide, and bubble and micro colored element are removed, it is colourless preparing
Significant effect during glass, finished product it is brilliant it is glimmering it is pure white, transparency is good, strength of glass and heat resistance improve.Each component respectively has effect simultaneously
There is also conflicting one side, the ability perfect adaptation only under special ratios, so that the glass glaze has relatively simultaneously
Low softening solidification temperature and the relatively low coefficient of expansion matched with low expansion ceramic inner bag, made pottery so as to meet to be used for low bulk
The requirement of porcelain inner bag back cover, it is durable in use compared with waterproofing agent and organic coating and can resist caused by various mode of heatings high
Ablation, aging caused by temperature, come off and melt, and without leachable in glass glaze use, applicability is higher, outward appearance is brighter,
Water proof anti-soil performance is good, more health environment-friendly, avoid organic coating and waterproofing agent come off in use or dissolution produce Toxic
Matter and can not with applique, agio bit line simultaneously solidify the problems such as, improve production efficiency.
Embodiment
For the ease of understanding the present invention, the present invention will be described more fully below, there is shown the present invention's
Preferred embodiment.But the present invention can realize in many different forms, however it is not limited to embodiment described herein.
On the contrary, the purpose for providing these embodiments is to make the understanding more thorough and comprehensive to the disclosure.
Unless otherwise defined, all of technologies and scientific terms used here by the article is with belonging to technical field of the invention
The implication that technical staff is generally understood that is identical.Term used in the description of the invention herein is intended merely to description tool
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein "and/or" includes one or more phases
The arbitrary and all combination of the Listed Items of pass.
The low-melting glass glaze of the low expansion ceramic inner bag back cover of an embodiment of the present invention, mainly by following quality hundred
The raw material of ratio is divided to be prepared：
Specifically, the softening temperature of above-mentioned low-melting glass glaze is 700 DEG C~720 DEG C, and solidification temperature is 730 DEG C~770
DEG C, the coefficient of expansion is 24 × 10-7/ DEG C~29 × 10-7/℃。
The present invention breaches traditional research thinking limitation, there is provided a kind of low melting point of low expansion ceramic inner bag back cover
Glass glaze, designed on formula using the vitreous of low bulk height, wherein each component has its specific function respectively, and lithium helps to reduce
The coefficient of expansion, so spodumene is introduced, but amount can excessively cause the secondary softening temperature of glass dust founded too high, and amount is too low can not
Low bulk is ensured, so simple spodumene can not balance each requirement, introduces magnesia as regulation, then coordinate a certain amount of oxidation
Zirconium helps to reach the required coefficient of expansion；Boric anhydride is that glassy state forms material with quartz sand, makes its height vitreous；Red lead helps to drop
The softening temperature of low glass dust, but the coefficient of expansion can be also improved, thus be also contradiction face；Ceria is that total conditioning agent plays catalysis
Agent, glass fining agent effect, and glass fining agent is made instead of traditional arsenic oxide arsenoxide using cerium oxide, remove bubble and micro band
Color element, the significant effect when preparing flint glass, finished product it is brilliant it is glimmering it is pure white, transparency is good, strength of glass and heat resistance improve.Respectively
Component respectively has effect, and there is also conflicting one side, the ability perfect adaptation only under special ratios, so that the glass simultaneously
Glaze has relatively low softening solidification temperature and the relatively low coefficient of expansion matched with low expansion ceramic inner bag simultaneously, so as to
Meet the requirement for low expansion ceramic inner bag back cover, it is durable in use compared with waterproofing agent and organic coating and can resist it is various plus
Ablation, aging caused by high temperature caused by hot mode, come off and melt, and without leachable, applicability in glass glaze use
Higher, outward appearance is brighter, and water proof anti-soil performance is good, more health environment-friendly, avoids organic coating and waterproofing agent comes off in use
Or dissolution produce noxious material and can not with applique, agio bit line simultaneously solidify the problems such as, improve production efficiency.
The preparation method of the low-melting glass glaze of the low expansion ceramic inner bag back cover of an embodiment of the present invention, including with
Lower S1~S3：
S1, by above-mentioned mass percent weigh each raw material.
S2, raw material mixed after 1420 DEG C~1450 DEG C to be melting into glass and regrind glass glaze powder is made.
Specifically, then directly poured into after raw material is mixed in 1420 DEG C~1450 DEG C high temperature meltings into glass metal in water
Water quenching obtains glass glaze powder into glass frit by glass frit ball milling and through 200 eye mesh screens.
S3, glaze slip is made in glass glaze powder produces above-mentioned low-melting glass glaze.
Specifically, glass glaze powder and water-based varnish are mixed and made into glaze slip and produce above-mentioned low-melting glass glaze.
The preparation method technique of present embodiment is simple, it is easy to accomplish, obtained glass glaze while have relatively low
Softening solidification temperature and the relatively low coefficient of expansion matched with low expansion ceramic inner bag, so as to meet to be used in low expansion ceramic
The requirement of courage back cover, durable in use compared with waterproofing agent and organic coating and high temperature caused by can resisting various mode of heatings are led
The ablation of cause, aging, come off and melt, and without leachable in glass glaze use, applicability is higher, outward appearance is brighter, waterproof
Antifouling property is good, more health environment-friendly, avoid organic coating and waterproofing agent come off in use or dissolution produce noxious material with
And the problems such as can not solidifying simultaneously with applique, agio bit line, there is very positive meaning.
The low-melting glass glaze of the above-mentioned low expansion ceramic inner bag back cover of an embodiment of the present invention is in low expansion ceramic
Application in inner bag back cover, comprises the following steps：The bottom of low expansion ceramic inner bag polished so that low expansion ceramic inner bag
Carcass is exposed, then by above-mentioned low-melting glass glaze silk-screen in the bottom outer surface of low expansion ceramic inner bag, then through low-temperature setting
Kiln is in 730 DEG C~770 DEG C secondary softenings and is solidified into glass glaze.
With the glass glaze powder after high temperature melting, low temperature softening is into glass glaze again for the application of present embodiment, and technique is simple, easily
Fairly good flatness is arranged at the bottom of the low expansion ceramic inner bag after popularization and application, processing, can be in close contact with heat-generating disc,
The efficiency of heating surface is good, health environment-friendly, and water proof anti-soil ability is strong, significantly improves the service life and aesthetic property of ceramic liner, tool
There are wide market prospects.
It is specific embodiment below.
Embodiment 1
Each raw material is weighed according to following mass percent：Spodumene 30%, quartz sand 15%, magnesia 19%, boric anhydride
8%th, alundum (Al2O3) 6%, petalite 5%, zirconium oxide 9%, red lead 3% and cerium oxide 5%.Raw material is sufficiently mixed
It is even, then in 1435 DEG C of high temperature meltings into glass metal, directly pour into water that water quenching is into glass frit immediately, by glass frit ball milling
Sieve to obtain glass glaze powder by the screen cloth of 200 mesh, then glass glaze powder is well mixed with water-based varnish and glaze slip is made produces
Low-melting glass glaze.
Embodiment 2
Each raw material is weighed according to following mass percent：Spodumene 29%, quartz sand 15%, magnesia 17%, boric anhydride
7%th, alundum (Al2O3) 8%, petalite 4%, zirconium oxide 10%, red lead 6% and cerium oxide 4%.Raw material is sufficiently mixed
It is even, then in 1420 DEG C of high temperature meltings into glass metal, directly pour into water that water quenching is into glass frit immediately, by glass frit ball milling
Sieve to obtain glass glaze powder by the screen cloth of 200 mesh, then glass glaze powder is well mixed with water-based varnish and glaze slip is made produces
Low-melting glass glaze.
Embodiment 3
Each raw material is weighed according to following mass percent：Spodumene 27%, quartz sand 13%, magnesia 19%, boric anhydride
8%th, alundum (Al2O3) 8%, petalite 5%, zirconium oxide 10%, red lead 5% and cerium oxide 5%.Raw material is sufficiently mixed
It is even, then in 1450 DEG C of high temperature meltings into glass metal, directly pour into water that water quenching is into glass frit immediately, by glass frit ball milling
Sieve to obtain glass glaze powder by the screen cloth of 200 mesh, then glass glaze powder is well mixed with water-based varnish and glaze slip is made produces
Low-melting glass glaze.
Comparative example 1
Each raw material is weighed according to following mass percent：Spodumene 20%, quartz sand 10%, magnesia 25%, boric anhydride
10%th, alundum (Al2O3) 4%, petalite 10%, zirconium oxide 12%, red lead 5% and cerium oxide 4%.Raw material is sufficiently mixed
Uniformly, then in 1450 DEG C of high temperature meltings into glass metal, directly pour into water that water quenching is into glass frit immediately, by glass frit ball
Screen cloth through 200 mesh after mill sieves to obtain glass glaze powder, then glass glaze powder is well mixed with water-based varnish glaze slip is made i.e.
Obtain glass glaze.
Comparative example 2
Each raw material is weighed according to following mass percent：Spodumene 10%, quartz sand 20%, magnesia 10%, boric anhydride
8%th, alundum (Al2O3) 10%, petalite 10%, zirconium oxide 12%, red lead 10% and cerium oxide 10%.Raw material is fully mixed
Close uniform, then in 1450 DEG C of high temperature meltings into glass metal, directly pour into water that water quenching is into glass frit immediately, by glass frit
Screen cloth through 200 mesh after ball milling sieves to obtain glass glaze powder, then glass glaze powder is well mixed with water-based varnish glaze slip is made
Produce glass glaze.
Performance test is carried out to the glass glaze of embodiment 1~3 and comparative example 1~2, as a result as shown in table 1, it is seen that the present invention
The relatively low expansion system that the glass glaze of embodiment has relatively low softening solidification temperature and matched with low expansion ceramic inner bag
Number is durable in use compared with waterproofing agent and organic coating and can so as to meet the requirement for low expansion ceramic inner bag back cover
Ablation, aging caused by resisting high temperature caused by various mode of heatings, come off and melt, and without dissolution in glass glaze use
Thing, applicability is higher, and outward appearance is brighter, and water proof anti-soil performance is good, more health environment-friendly.
Table 1
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that come for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (4)
1. a kind of low-melting glass glaze of low expansion ceramic inner bag back cover, it is characterised in that mainly by following mass percent
Raw material be prepared：
2. low-melting glass glaze according to claim 1, it is characterised in that the softening temperature of the low-melting glass glaze is
700 DEG C~720 DEG C, solidification temperature is 730 DEG C~770 DEG C, and the coefficient of expansion is 24 × 10-7/ DEG C~29 × 10-7/℃。
3. a kind of preparation method of the low-melting glass glaze of the low expansion ceramic inner bag back cover described in claim 1 or 2, it is special
Sign is, comprises the following steps：
Mass percent according to claim 1 weighs each raw material；
The raw material is mixed after 1420 DEG C~1450 DEG C to be melting into glass and regrind glass glaze powder is made；
Glaze slip is made in the glass glaze powder and produces the low-melting glass glaze.
4. a kind of low-melting glass glaze of the low expansion ceramic inner bag back cover described in claim 1 or 2 is in low expansion ceramic
Application in courage back cover, it is characterised in that comprise the following steps：The bottom of low expansion ceramic inner bag is polished so that described low swollen
The carcass of swollen ceramic liner is exposed, then by the low-melting glass glaze silk-screen in the bottom of the low expansion ceramic inner bag, then
Cured kiln is secondary to be softened and is solidified into glass glaze.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711339534.7A CN107892482B (en) | 2017-12-14 | 2017-12-14 | Low-melting-point glass glaze for low-expansion ceramic liner back cover and preparation method and application thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711339534.7A CN107892482B (en) | 2017-12-14 | 2017-12-14 | Low-melting-point glass glaze for low-expansion ceramic liner back cover and preparation method and application thereof |
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| Publication Number | Publication Date |
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| CN107892482A true CN107892482A (en) | 2018-04-10 |
| CN107892482B CN107892482B (en) | 2020-07-07 |
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| CN201711339534.7A Active CN107892482B (en) | 2017-12-14 | 2017-12-14 | Low-melting-point glass glaze for low-expansion ceramic liner back cover and preparation method and application thereof |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112408790A (en) * | 2020-12-04 | 2021-02-26 | 胜利新大新材料股份有限公司 | Glass-lined glaze, anti-corrosion layer in oil field pipeline and preparation method of anti-corrosion layer |
| CN115286249A (en) * | 2022-08-22 | 2022-11-04 | 九牧厨卫股份有限公司 | Self-cleaning glaze and application thereof |
| CN115432928A (en) * | 2022-09-01 | 2022-12-06 | 中山市欧莱克电器有限公司 | Ceramic glaze applied to electric heating appliance inner container and preparation method and application thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104130024A (en) * | 2014-07-23 | 2014-11-05 | 广东宏陶陶瓷有限公司 | High-temperature bright-red printing glaze, preparation method and preparation method of glazed tile |
| CN107382069A (en) * | 2017-07-20 | 2017-11-24 | 景德镇陶瓷大学 | A kind of inexpensive low expansion ceramic is without zirconia enamel and preparation method thereof |
-
2017
- 2017-12-14 CN CN201711339534.7A patent/CN107892482B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104130024A (en) * | 2014-07-23 | 2014-11-05 | 广东宏陶陶瓷有限公司 | High-temperature bright-red printing glaze, preparation method and preparation method of glazed tile |
| CN107382069A (en) * | 2017-07-20 | 2017-11-24 | 景德镇陶瓷大学 | A kind of inexpensive low expansion ceramic is without zirconia enamel and preparation method thereof |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112408790A (en) * | 2020-12-04 | 2021-02-26 | 胜利新大新材料股份有限公司 | Glass-lined glaze, anti-corrosion layer in oil field pipeline and preparation method of anti-corrosion layer |
| CN115286249A (en) * | 2022-08-22 | 2022-11-04 | 九牧厨卫股份有限公司 | Self-cleaning glaze and application thereof |
| CN115286249B (en) * | 2022-08-22 | 2023-04-14 | 九牧厨卫股份有限公司 | Self-cleaning glaze and application thereof |
| CN115432928A (en) * | 2022-09-01 | 2022-12-06 | 中山市欧莱克电器有限公司 | Ceramic glaze applied to electric heating appliance inner container and preparation method and application thereof |
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| Publication number | Publication date |
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| CN107892482B (en) | 2020-07-07 |
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Denomination of invention: Low melting point glass glaze for bottom sealing of low expansion ceramic liner and its preparation method and Application Effective date of registration: 20220215 Granted publication date: 20200707 Pledgee: Changde Finance Guarantee Co.,Ltd. Pledgor: HUNAN JIASHENG DIANTAO NEW MATERIAL CO.,LTD. Registration number: Y2022980001566 |