CN107056045A - A kind of pyroceram and preparation method thereof - Google Patents
A kind of pyroceram and preparation method thereof Download PDFInfo
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- CN107056045A CN107056045A CN201710521872.6A CN201710521872A CN107056045A CN 107056045 A CN107056045 A CN 107056045A CN 201710521872 A CN201710521872 A CN 201710521872A CN 107056045 A CN107056045 A CN 107056045A
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- pyroceram
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Classifications
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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
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/083—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B1/00—Preparing the batches
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/02—Other methods of shaping glass by casting molten glass, e.g. injection moulding
-
- 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
- C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
-
- 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
- C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
- C03C1/004—Refining agents
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Glass Compositions (AREA)
Abstract
The invention discloses a kind of pyroceram, the component of following parts by weight is included：38 parts of 75 85 parts of silica, 30 40 parts of aluminum oxide, 15 25 parts of silicon nitride, 10 20 parts of chrome green, 5 10 parts of lime stone, 26 parts of quartz sand, 24 parts of high temperature resistant additive, 0.5 1 parts of levelling agent and compound clarifier.Its preparation method is：In parts by weight, weigh each raw material ball milling to mix, obtain compound；Add mixture into quartzy dry pot, be put into microwave Muffle furnace and melt, and add high temperature additive, compound clarifier and levelling agent, obtain glass metal；Glass metal is poured into metal die and is molded, room temperature is cooled to and produces pyroceram.The present invention provides a kind of pyroceram and preparation method thereof, has excellent resistance to elevated temperatures by glass made from this method, and the preparation method is simple, it is easy to industrialized production.
Description
Technical field
The present invention relates to glass material field, more particularly to a kind of pyroceram and preparation method thereof.
Background technology
Pyroceram is also referred to as high temp glass, is that glass can reach under the conditions of certain temperature, medium and pressure rating
To or bear the special glass of corresponding temperature and resistance to relevant pressure grade and Applicable media, usually using high-purity siliceous ore deposit
Material, refines through high temperature and forms, and it still can hold the original permeability of glass and transparency in high temperature environments.
The features such as high temp glass has good transparency height, high temperature resistant, heat endurance, stable chemical performance, is automatic industrial manufacturing line
Indispensable key element, is widely used in the industries such as pressure vessel manufacturer, steel, metallurgy, petrochemical industry, military project, light fixture neck
Domain.
At present, though high temperature resistant is used widely in production and life, in some special high-temperature operation fields,
Existing pyroceram can not meet demand, therefore be badly in need of a kind of glass with resistance to elevated temperatures.
The content of the invention
Present invention aims in order to solve the above problems there is provided a kind of pyroceram and preparation method thereof, by this
Glass made from method has excellent resistance to elevated temperatures, and the preparation method is simple, it is easy to industrialized production, particular technique
Scheme is as follows：
A kind of pyroceram, includes the component of following parts by weight：75-85 parts of silica, 30-40 parts of aluminum oxide, silicon nitride
15-25 parts, 10-20 parts of chrome green, 5-10 parts of lime stone, 2-6 parts of quartz sand, 2-4 parts of high temperature resistant additive, levelling agent
0.5-1 parts and 3-8 parts of compound clarifier.
It is preferred that, 80 parts of the silica, 35 parts of aluminum oxide, 20 parts of silicon nitride, 15 parts of chrome green, lime stone 7
Part, 4 parts of quartz sand, 3 parts of high temperature resistant additive, 0.7 part of levelling agent and 5 parts of compound clarifier.
It is preferred that, the high temperature resistant additive includes each raw material of above parts by weight：1-3 parts of phenolic resin, sodium metasilicate
0.6-1.5 parts and 0.4-1 parts of silane coupler.
It is preferred that, the levelling agent includes each raw material of above parts by weight：0.4-0.8 parts of modified polyether, butyl cellulose
0.1-0.5 parts of 0.2-0.6 and dimethyl silicone polymer.
It is preferred that, the compound clarifier includes each raw material of above parts by weight：2-6 parts of sodium nitrate, 1-5 parts of Firebrake ZB,
0.2-0.8 parts of 0.5-2 parts of strontium carbonate and potassium fluorozirconate
A kind of preparation method of pyroceram, comprises the following steps：
（1）In parts by weight, silica, aluminum oxide, silicon nitride, chrome green, lime stone and quartz are weighed respectively
Sand ball milling is mixed, and obtains compound；
（2）Add mixture into quartzy dry pot, be put into microwave Muffle furnace and melt, be warming up to 1100-1200 DEG C, be incubated 2-
4h, then high temperature additive, compound clarifier and levelling agent are added thereto, it is warming up to 1200-1300 DEG C and is well mixed, is incubated
3-5h, obtains glass metal；
（3）Glass metal is poured into the metal die for be preheated to 350-450 DEG C and is molded, then the glass specimen of shaping is put into
3-5h is incubated in 400-500 DEG C of Muffle furnace, then is warming up to 600-650 DEG C of insulation 2-3h, room temperature is cooled to and produces high temperature resistant glass
Glass.
It is preferred that, the step（1）In ball milling mix as principle is placed in into wet-milling 20-30min on ball mill, ball mill
Rotating speed is 250-350r/min.
It is preferred that, the step（2）Well mixed condition：20-30min is stirred with 300-400r/min rotating speeds.
Compared with prior art, beneficial effects of the present invention：The present invention provides a kind of pyroceram and preparation method thereof,
There is excellent resistance to elevated temperatures by glass made from this method, and the preparation method is simple, it is easy to industrialized production, tool
Body is as follows：
(1) present invention is raw material by using silica, aluminum oxide, silicon nitride, chrome green, lime stone and quartz sand,
Using these raw material high intensity, high high-temperature stability, make be made glass not only have preferable resistance to elevated temperatures, and with compared with
High intensity, these raw materials and is mixed while being milled by ball mill, makes that obtained glass is homogeneous, surface smoothness pole
Height, in addition, the overall process of preparation method of the present invention is all nontoxic, while having, cost is low, technique is simple, suitable for work
Industry metaplasia is produced；
(2) present invention further improves the resistance to elevated temperatures of the glass by adding high temperature additive；
(3) present invention eliminates the generation of bubble in glass metal, while glass can be reduced by adding compound clarifier and levelling agent
Glass fluid viscosity, increases melt flow performance, and make that each raw material of glass kind coordinates is even closer, makes the intensity of glass further
Strengthen, while resistance to elevated temperatures is further improved.
Embodiment
To make the purpose, technical scheme and advantage of the embodiment of the present invention clearer, below in the embodiment of the present invention
Technical scheme is clearly and completely described, it is clear that described embodiment is a part of embodiment of the invention, rather than entirely
The embodiment in portion.Based on the embodiment in the present invention, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belongs to the scope of protection of the invention.
Embodiment 1
A kind of pyroceram, includes the component of following parts by weight：80 parts of silica, 35 parts of aluminum oxide, 20 parts of silicon nitride, three
Aoxidize 5 parts of 15 parts of two chromium, 7 parts of lime stone, 4 parts of quartz sand, 3 parts of high temperature resistant additive, 0.7 part of levelling agent and compound clarifier.
Wherein, the high temperature resistant additive includes each raw material of above parts by weight：2 parts of phenolic resin, 1 part of sodium metasilicate and silicon
0.7 part of alkane coupling agent.
Wherein, the levelling agent includes each raw material of above parts by weight：0.6 part of modified polyether, butyl cellulose 0.4 and poly-
0.3 part of dimethyl siloxane.
Wherein, the compound clarifier includes each raw material of above parts by weight：4 parts of sodium nitrate, 3 parts of Firebrake ZB, strontium carbonate
1.4 parts and 0.5 part of potassium fluorozirconate
A kind of preparation method of pyroceram, comprises the following steps：
（1）In parts by weight, silica, aluminum oxide, silicon nitride, chrome green, lime stone and quartz are weighed respectively
Sand ball milling is mixed, and obtains compound；
（2）Add mixture into quartzy dry pot, be put into microwave Muffle furnace and melt, be warming up to 1150 DEG C, be incubated 3h, then to its
Middle addition high temperature additive, compound clarifier and levelling agent, are warming up to 1250 DEG C and are well mixed, be incubated 4h, obtain glass metal；
（3）Glass metal is poured into be preheated in 400 DEG C of metal die and is molded, the glass specimen of shaping is then put into 450 DEG C
Muffle furnace in be incubated 4h, then be warming up to 630 DEG C of insulation 2.5h, be cooled to room temperature and produce pyroceram.
Wherein, the step（1）In ball milling mix as principle is placed in into wet-milling 25min on ball mill, drum's speed of rotation
For 300r/min.
Wherein, the step（2）Well mixed condition：25min is stirred with 350r/min rotating speeds.
Embodiment 2
A kind of pyroceram, includes the component of following parts by weight：75 parts of silica, 30 parts of aluminum oxide, 15 parts of silicon nitride, three
Aoxidize 3 parts of 10 parts of two chromium, 5 parts of lime stone, 2 parts of quartz sand, 2 parts of high temperature resistant additive, 0.5 part of levelling agent and compound clarifier.
Wherein, the high temperature resistant additive includes each raw material of above parts by weight：1 part of phenolic resin, 0.6 part of sodium metasilicate and
0.4 part of silane coupler.
Wherein, the levelling agent includes each raw material of above parts by weight：0.4 part of modified polyether, butyl cellulose 0.2 and poly-
0.1 part of dimethyl siloxane.
Wherein, the compound clarifier includes each raw material of above parts by weight：Sodium nitrate 2,1 part of Firebrake ZB, strontium carbonate 0.5
0.2 part of part and potassium fluorozirconate
A kind of preparation method of pyroceram, comprises the following steps：
（1）In parts by weight, silica, aluminum oxide, silicon nitride, chrome green, lime stone and quartz are weighed respectively
Sand ball milling is mixed, and obtains compound；
（2）Add mixture into quartzy dry pot, be put into microwave Muffle furnace and melt, be warming up to 1100 DEG C, be incubated 2h, then to its
Middle addition high temperature additive, compound clarifier and levelling agent, are warming up to 1200 DEG C and are well mixed, be incubated 3h, obtain glass metal；
（3）Glass metal is poured into be preheated in 350 DEG C of metal die and is molded, the glass specimen of shaping is then put into 400 DEG C
Muffle furnace in be incubated 3h, then be warming up to 600 DEG C of insulation 2h, be cooled to room temperature and produce pyroceram.
Wherein, the step（1）In ball milling mix as principle is placed in into wet-milling 20min on ball mill, drum's speed of rotation
For 250r/min.
Wherein, the step（2）Well mixed condition：20min is stirred with 300r/min rotating speeds.
Embodiment 3
A kind of pyroceram, includes the component of following parts by weight：85 parts of silica, 40 parts of aluminum oxide, 25 parts of silicon nitride, three
Aoxidize 8 parts of 20 parts of two chromium, 10 parts of lime stone, 6 parts of quartz sand, 4 parts of high temperature resistant additive, 1 part of levelling agent and compound clarifier.
Wherein, the high temperature resistant additive includes each raw material of above parts by weight：3 parts of phenolic resin, 1.5 parts of sodium metasilicate and
1 part of silane coupler.
Wherein, the levelling agent includes each raw material of above parts by weight：0.8 part of modified polyether, butyl cellulose 0.6 and poly-
0.5 part of dimethyl siloxane.
Wherein, the compound clarifier includes each raw material of above parts by weight：6 parts of sodium nitrate, 5 parts of Firebrake ZB, strontium carbonate 2
0.8 part of part and potassium fluorozirconate
A kind of preparation method of pyroceram, comprises the following steps：
（1）In parts by weight, silica, aluminum oxide, silicon nitride, chrome green, lime stone and quartz are weighed respectively
Sand ball milling is mixed, and obtains compound；
（2）Add mixture into quartzy dry pot, be put into microwave Muffle furnace and melt, be warming up to 1200 DEG C, be incubated 4h, then to its
Middle addition high temperature additive, compound clarifier and levelling agent, are warming up to 1300 DEG C and are well mixed, be incubated 5h, obtain glass metal；
（3）Glass metal is poured into be preheated in 450 DEG C of metal die and is molded, the glass specimen of shaping is then put into 500 DEG C
Muffle furnace in be incubated 5h, then be warming up to 650 DEG C of insulation 3h, be cooled to room temperature and produce pyroceram.
Wherein, the step（1）In ball milling mix as principle is placed in into wet-milling 30min on ball mill, drum's speed of rotation
For 350r/min.
Wherein, the step（2）Well mixed condition：30min is stirred with 400r/min rotating speeds.
Service check is carried out to pyroceram prepared by above-mentioned 3 embodiments below, wherein reference examples 1 are using application
Notification number pyroceram made from the preparation method described in CN105060708A；Reference examples 2 be use application notification number for
Pyroceram made from preparation method described in CN104926144A；And according to《GB15763.2-2005 safe glass for building
Glass》Defined testing standard carries out performance test, and test result is as shown in table 1：
Table 1
From table 1 it follows that the pyroceram of the present invention is compared with reference examples, in resistance to compression hardness, most thermal change temperature, senior engineer
Make to be superior to comparative example in the performance indications such as temperature and Mohs' hardness, and higher than national standard, illustrate the high temperature resistant glass of the present invention
Glass has excellent resistance to elevated temperatures, while having higher hardness, available for some special high-temperature operation fields.
To sum up, the present invention provides a kind of pyroceram and preparation method thereof, has by glass made from this method excellent
Different resistance to elevated temperatures, and the preparation method is simple, it is easy to industrialized production, it is specific as follows：By using silica, oxygen
It is raw material to change aluminium, silicon nitride, chrome green, lime stone and quartz sand, using these raw material high intensity, high high-temperature stability,
Make glass is made not only with preferable resistance to elevated temperatures, and with higher intensity, while milling these by ball mill
Raw material is simultaneously mixed, and makes that obtained glass is homogeneous, surface smoothness is high, in addition, the overall process of the preparation method of the present invention
All it is nontoxic, while having, cost is low, technique simple, suitable for industrialized production.
In addition, by adding high temperature additive, further improving the resistance to elevated temperatures of the glass.
Meanwhile, the present invention eliminates the generation of bubble in glass metal, while can by adding compound clarifier and levelling agent
Viscosity of glass metal is reduced, increases melt flow performance, make that each raw material of glass kind coordinates is even closer, makes the intensity of glass
Further strengthen, while resistance to elevated temperatures is further improved.
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, although with reference to foregoing reality
Apply example the present invention is described in detail, for those skilled in the art, it still can be to previous embodiment
Described technical scheme is modified, or carries out equivalent substitution to which part technical characteristic.All spirit in the present invention
Within principle, any modification, equivalent substitution and improvements made etc. should be included in the scope of the protection.
Claims (8)
1. a kind of pyroceram, it is characterised in that include the component of following parts by weight：75-85 parts of silica, aluminum oxide
30-40 parts, 15-25 parts of silicon nitride, 10-20 parts of chrome green, 5-10 parts of lime stone, 2-6 parts of quartz sand, high temperature resistant additive
3-8 parts of 2-4 parts, 0.5-1 parts of levelling agent and compound clarifier.
2. pyroceram according to claim 1, it is characterised in that 80 parts of the silica, 35 parts of aluminum oxide, nitrogen
20 parts of SiClx, 15 parts of chrome green, 7 parts of lime stone, 4 parts of quartz sand, 3 parts of high temperature resistant additive, 0.7 part of levelling agent and compound
5 parts of fining agent.
3. pyroceram according to claim 1, it is characterised in that the high temperature resistant additive includes above parts by weight
Each raw material：0.4-1 parts of 1-3 parts of phenolic resin, 0.6-1.5 parts of sodium metasilicate and silane coupler.
4. pyroceram according to claim 1, it is characterised in that the levelling agent includes each original of above parts by weight
Material：0.1-0.5 parts of 0.4-0.8 parts of modified polyether, butyl cellulose 0.2-0.6 and dimethyl silicone polymer.
5. pyroceram according to claim 1, it is characterised in that the compound clarifier includes above parts by weight
Each raw material：0.2-0.8 parts of 2-6 parts of sodium nitrate, 1-5 parts of Firebrake ZB, 0.5-2 parts of strontium carbonate and potassium fluorozirconate.
6. the preparation method of a kind of pyroceram according to claim any one of 1-5, it is characterised in that including as follows
Step：
(1) in parts by weight, silica, aluminum oxide, silicon nitride, chrome green, lime stone and quartz are weighed respectively
Sand ball milling is mixed, and obtains compound；
(2) add mixture into quartzy dry pot, be put into microwave Muffle furnace and melt, be warming up to 1100-1200 DEG C, be incubated 2-
4h, then high temperature additive, compound clarifier and levelling agent are added thereto, it is warming up to 1200-1300 DEG C and is well mixed, is incubated
3-5h, obtains glass metal；
(3) glass metal is poured into the metal die for be preheated to 350-450 DEG C and be molded, be then put into the glass specimen of shaping
3-5h is incubated in 400-500 DEG C of Muffle furnace, then is warming up to 600-650 DEG C of insulation 2-3h, room temperature is cooled to and produces high temperature resistant glass
Glass.
7. the preparation method of pyroceram according to claim 6, it is characterised in that the step（1）In ball milling
Mix as principle is placed in into wet-milling 20-30min on ball mill, drum's speed of rotation is 250-350r/min.
8. the preparation method of pyroceram according to claim 6, it is characterised in that the step（2）It is well mixed
Condition：20-30min is stirred with 300-400r/min rotating speeds.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710521872.6A CN107056045A (en) | 2017-06-30 | 2017-06-30 | A kind of pyroceram and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710521872.6A CN107056045A (en) | 2017-06-30 | 2017-06-30 | A kind of pyroceram and preparation method thereof |
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| Publication Number | Publication Date |
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ID=59613542
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107601915A (en) * | 2017-11-03 | 2018-01-19 | 太仓经济开发区坚毅工艺美术品工作室 | The production method and colouring glass of colouring glass |
| CN107640884A (en) * | 2017-11-03 | 2018-01-30 | 太仓经济开发区坚毅工艺美术品工作室 | The preparation method of bend glass |
| CN107640892A (en) * | 2017-11-03 | 2018-01-30 | 太仓经济开发区坚毅工艺美术品工作室 | The production method and reinforcing glass of reinforcing glass |
| CN107663005A (en) * | 2017-11-07 | 2018-02-06 | 太仓经济开发区蕴源吉光工艺美术品工作室 | Pyroceram and preparation method thereof |
| CN107721157A (en) * | 2017-11-07 | 2018-02-23 | 太仓经济开发区蕴源吉光工艺美术品工作室 | The production method of colored glazed glass |
| CN108101364A (en) * | 2018-01-23 | 2018-06-01 | 合肥利裕泰玻璃制品有限公司 | A kind of pyroceram and preparation method thereof |
| CN108117266A (en) * | 2017-12-30 | 2018-06-05 | 安徽杜氏高科玻璃有限公司 | A kind of wear-resisting acid corrosion-resistant glass |
| CN108178507A (en) * | 2018-02-13 | 2018-06-19 | 江苏奥蓝工程玻璃有限公司 | A kind of preparation method of heat resistant glass |
| CN108358446A (en) * | 2018-05-04 | 2018-08-03 | 青岛耀恩玻璃制品有限公司 | A kind of pyroceram preparation process |
| CN113929302A (en) * | 2021-11-17 | 2022-01-14 | 九江润诚新材料有限公司 | Production method of high-temperature-resistant special glass |
| CN114573230A (en) * | 2020-12-02 | 2022-06-03 | 苏州市灵通玻璃制品有限公司 | Production process of glass panel |
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| CN104860540A (en) * | 2015-06-03 | 2015-08-26 | 苏州靖羽新材料有限公司 | Heat-resistant glass and preparation method thereof |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107601915A (en) * | 2017-11-03 | 2018-01-19 | 太仓经济开发区坚毅工艺美术品工作室 | The production method and colouring glass of colouring glass |
| CN107640884A (en) * | 2017-11-03 | 2018-01-30 | 太仓经济开发区坚毅工艺美术品工作室 | The preparation method of bend glass |
| CN107640892A (en) * | 2017-11-03 | 2018-01-30 | 太仓经济开发区坚毅工艺美术品工作室 | The production method and reinforcing glass of reinforcing glass |
| CN107663005A (en) * | 2017-11-07 | 2018-02-06 | 太仓经济开发区蕴源吉光工艺美术品工作室 | Pyroceram and preparation method thereof |
| CN107721157A (en) * | 2017-11-07 | 2018-02-23 | 太仓经济开发区蕴源吉光工艺美术品工作室 | The production method of colored glazed glass |
| CN108117266A (en) * | 2017-12-30 | 2018-06-05 | 安徽杜氏高科玻璃有限公司 | A kind of wear-resisting acid corrosion-resistant glass |
| CN108101364A (en) * | 2018-01-23 | 2018-06-01 | 合肥利裕泰玻璃制品有限公司 | A kind of pyroceram and preparation method thereof |
| CN108178507A (en) * | 2018-02-13 | 2018-06-19 | 江苏奥蓝工程玻璃有限公司 | A kind of preparation method of heat resistant glass |
| CN108358446A (en) * | 2018-05-04 | 2018-08-03 | 青岛耀恩玻璃制品有限公司 | A kind of pyroceram preparation process |
| CN114573230A (en) * | 2020-12-02 | 2022-06-03 | 苏州市灵通玻璃制品有限公司 | Production process of glass panel |
| CN114573230B (en) * | 2020-12-02 | 2023-11-14 | 苏州市灵通玻璃制品有限公司 | Production process of glass panel |
| CN113929302A (en) * | 2021-11-17 | 2022-01-14 | 九江润诚新材料有限公司 | Production method of high-temperature-resistant special glass |
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Application publication date: 20170818 |