CN111662010A - Glass and preparation method thereof - Google Patents
Glass and preparation method thereof Download PDFInfo
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- CN111662010A CN111662010A CN202010571956.2A CN202010571956A CN111662010A CN 111662010 A CN111662010 A CN 111662010A CN 202010571956 A CN202010571956 A CN 202010571956A CN 111662010 A CN111662010 A CN 111662010A
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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
- C03C3/085—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal
- C03C3/087—Glass compositions containing silica with 40% to 90% silica, by weight containing aluminium oxide or an iron compound containing an oxide of a divalent metal containing calcium oxide, e.g. common sheet or container glass
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B18/00—Shaping glass in contact with the surface of a liquid
- C03B18/02—Forming sheets
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B18/00—Shaping glass in contact with the surface of a liquid
- C03B18/02—Forming sheets
- C03B18/18—Controlling or regulating the temperature of the float bath; Composition or purification of the float bath
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
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- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Glass Compositions (AREA)
Abstract
The application relates to the technical field of glass preparation, and provides glass and a preparation method thereof. The glass provided herein comprises: SiO 22、Al2O3、CaO、MgO、Na2O and Fe2O3(ii) a With SiO2Is calculated by 71.9 to 72.1 portions of Al2O31.25 to 1.35 portions of CaO, 8.65 to 8.75 portions of CaO, 3.35 to 3.45 portions of MgO and Na213.4 to 13.6 portions of O and Fe2O30.595 parts to 0.605 parts. By adjusting the components and the content of the glass, the softening point temperature and the hardening forming temperature of the glass are effectively improved under the condition of keeping the original main body performance of the glass unchanged, and the influence of a forming area in a float process on the transmission stripes of the glass is reduced by promoting the rapid forming and hardening of the glass, so that the quality of the transmission stripes of the glass is improved。
Description
Technical Field
The application belongs to the technical field of glass preparation, and particularly relates to glass and a preparation method thereof.
Background
The automobile front windshield is usually produced by sandwiching a layer of film between 2 glass sheets with the thickness of 2.1mm, the quality of the used glass sheets is directly related to the automobile glass sheet combination effect, and the quality of the transmission stripes is an inspection standard for judging the quality of automobile-grade glass produced by a float process. The detection method of the transmission fringe quality comprises the following steps: the method comprises the steps of irradiating a glass plate by adopting a point light source in a mode that the light source direction and the glass plane direction form an included angle of 45 degrees, projecting stripes generated by transmission onto a screen, judging whether the stripes are good or not by visually observing the brightness degree and the uniformity of the stripes, and if the brightness degree of the transmission stripes is shallow, the stripes are clear and have no thick dark bands or bright bands, proving that the quality of the transmission stripes of the glass is good, otherwise, the quality of the transmission stripes is deviated.
The quality of the transmission stripes of the existing glass original sheet is generally poor, and how to improve the quality of the transmission stripes of the glass original sheet becomes a key factor for improving the quality of the front windshield of the glass automobile.
Disclosure of Invention
The application aims to provide glass and a preparation method thereof, and aims to solve the problem that the quality of transmission stripes of the existing automobile-grade glass is poor.
In order to achieve the purpose of the application, the technical scheme adopted by the application is as follows:
in a first aspect, the present application provides a glass comprising: SiO 22、Al2O3、CaO、MgO、Na2O and Fe2O3；
With the SiO2Is 71.9 to 72.1 parts by weight of Al2O31.25 to 1.35 parts of CaO, 8.65 to 8.75 parts of CaO, 3.35 to 3.45 parts of MgO and Na2O is 13.4 to 13.6 portions, and the Fe2O30.595 parts to 0.605 parts.
In a second aspect, the present application provides a method of making a glass comprising the steps of:
providing a glass melt, the glass melt comprising SiO2、Al2O3、CaO、MgO、Na2O and Fe2O3With said SiO2Is 71.9 to 72.1 parts by weight of Al2O3Is 1.25 parts-1.35 parts of CaO, 3.35-3.45 parts of MgO, and Na2O is 13.4 to 13.6 portions, and the Fe2O30.595 parts to 0.605 parts;
and flowing the molten glass into a molten metal tank containing molten metal, and forming the molten glass on the surface of the molten metal to obtain the glass.
The first aspect of the present application provides a glass comprising SiO in a specific weight part2、Al2O3、CaO、MgO、Na2O and Fe2O3The glass is adjusted through the components and the content thereof, the softening point temperature and the hardening forming temperature of the glass are effectively improved under the condition that the original main body performance of the glass is not changed, and the influence of a forming area in a float process on the transmission stripes of the glass is reduced by promoting the rapid forming and hardening of the glass, so that the quality of the transmission stripes of the glass is improved.
According to the preparation method of the glass provided by the second aspect of the application, the components and the content of the glass liquid are adjusted, and the glass is prepared by adopting a float process, so that the softening point temperature and the hardening forming temperature of the glass are increased, the brightness degree of the obtained transmission stripes of the glass is uniform, the texture is clear, the glass quality is high, the quality of the glass automobile front windshield is favorably improved, and the preparation method has a good commercial prospect.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application more clearly apparent, the present application is further described in detail below with reference to the embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
In this application, the term "and/or" describes an association relationship of associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a is present alone, A and B are present simultaneously, and B is present alone. Wherein A and B can be singular or plural.
The weight of the related components mentioned in the description of the embodiments of the present application may not only refer to the specific content of each component, but also represent the proportional relationship of the weight among the components, and therefore, the content of the related components is scaled up or down within the scope disclosed in the description of the embodiments of the present application as long as it is scaled up or down according to the description of the embodiments of the present application. Specifically, the mass described in the specification of the embodiments of the present application may be a mass unit known in the chemical industry field such as μ g, mg, g, kg, etc.
In order to solve the problem of poor quality of transmission stripes of the existing automobile-grade glass, the applicant creatively discovers that a glass belt formed by the existing stock is in a softened state in a low-temperature region of a molten metal tank in the process of producing the glass by adopting a float process, so that the glass is easy to generate heavy stripes, and the zebra angle is low, so that the quality of the transmission stripes of the produced glass is poor, and the quality of the automobile front windshield glass is directly influenced. The applicant has thus made corresponding improvements to the glass batch and to the process for its production.
A first aspect of embodiments of the present application provides a glass comprising: SiO 22、Al2O3、CaO、MgO、Na2O and Fe2O3；
With SiO2Is calculated by 71.9 to 72.1 portions of Al2O31.25 to 1.35 portions of CaO, 8.65 to 8.75 portions of CaO, 3.35 to 3.45 portions of MgO and Na213.4 to 13.6 portions of O and Fe2O30.595 parts to 0.605 parts.
The glass provided by the embodiment of the application comprises SiO with specific weight parts2、Al2O3、CaO、MgO、Na2O and Fe2O3The glass is adjusted through the components and the content thereof, the softening point temperature and the hardening forming temperature of the glass are effectively improved under the condition that the original main body performance of the glass is not changed, and the influence of a forming area in a float process on the transmission stripes of the glass is reduced by promoting the rapid forming and hardening of the glass, so that the quality of the transmission stripes of the glass is improved.
In particular, SiO2The glass is a framework material of the glass, and the glass is endowed with good transparency, chemical stability and thermal stability. SiO 22The content of (A) influences the viscosity of the glassThermal and chemical stability, based on 100 parts by weight of the total glass, of SiO in the present application271.9-72.1 parts by weight of SiO in the specific examples2In an amount of 71.9 parts, 72 parts or 72.1 parts of SiO2The glass formed by compounding with other residual components has good thermal stability, good chemical stability, moderate viscosity and excellent comprehensive performance.
Al2O3The crystallization tendency of the glass can be reduced, the crystallization stability is improved, the mechanical strength of the glass is increased, the forming performance of the glass is improved, and the stress of the glass is improved. Based on the total weight of the glass as 100 parts, the Al is2O31.25 to 1.35 parts by weight of Al in the specific examples2O3In an amount of 1.25 parts, 1.3 parts or 1.35 parts by weight of Al2O3Compounding the SiO with the weight of 71.9 to 72.1 parts2The glass softening point temperature and the glass hardening forming temperature can be improved, and the rapid forming hardening of the glass can be promoted.
CaO and MgO can improve the chemical stability and mechanical strength, can reduce the viscosity of the glass at high temperature, is beneficial to melting and clarifying the glass, and can increase the viscosity and hardening speed of the glass at low temperature, thereby being beneficial to improving the drawing speed; na (Na)2The O is used as a fluxing agent, so that the viscosity of the glass can be obviously reduced, and the fluidity of the molten glass can be increased; fe2O3As a coloring agent, the glass transparency and the heat permeability of the molten glass are reduced, the temperature difference between the upper layer and the lower layer of the glass is increased, the troposphere of the molten glass is prevented from being damaged, and the corrosion of a refractory material at the bottom of a kiln is reduced. In the examples of the present application, the weight of CaO is 8.65 to 8.75 parts, the weight of MgO is 3.35 to 3.45 parts, and R is calculated on the basis of 100 parts by weight of the total glass213.6 to 13.8 portions of O and Fe2O30.595 to 0.605 weight parts, 1.25 to 1.35 weight parts of Al2O3And SiO 71.9-72.1 parts by weight2So that the glass can keep the original main performance, avoid the limitation of the application range of the glass, effectively improve the softening point temperature and the hardening and forming temperature of the glass, and promote the glass liquid in the float process by increasing the hardening and forming temperatureThe hardening and forming speed of the glass is increased, so that the influence of a forming area on the transmission stripes of the glass in a float process is reduced by promoting the rapid forming and hardening of the glass, and the quality of the transmission stripes of the glass is improved.
In addition to the above embodiment, the glass further contains SO3And TiO2With SiO2Is calculated by 71.9 to 72.1 portions of SO30.16 to 0.18 portion of TiO20.01 to 0.03 portion. By adding a specific amount of SO to the glass3And TiO2The properties of the glass can be further improved, for example, the clarity of the glass can be improved.
On the basis of the above embodiment, the glass further comprises K2O, in SiO2In an amount of 71.9 to 72.1 parts by weight, K20.3 to 0.4 portion of O. By adding a specific amount of K to the glass2And O, so as to further improve the performances of the glass such as transmittance, glossiness and the like.
The glass with the above-specified amounts of ingredients has a softening point temperature greater than 725 ℃ and a setting temperature greater than 915 ℃. Compared with the existing glass, the softening point temperature and the hardening forming temperature of the glass provided by the embodiment of the application are further improved.
In the specific embodiment, the glass comprises the following components in parts by weight based on 100 parts by weight of the total glass: SiO 2272 parts of Al2O31.3 parts, CaO 8.7 parts, MgO 3.4 parts, Na2O13.51 parts, K20.3 part of O, Fe2O30.6 part of SO30.17 part of TiO20.02 part. The glass had a calculated softening point temperature of 730.22 ℃, a measured value of 731 ℃ and a calculated hardening temperature of 923.24 ℃.
On the basis of the technical scheme of the glass, the hardening and forming speed of the molten glass is increased, so that the forming area in the molten metal tank moves forward, and the forming control difficulty is increased.
Accordingly, a method of making glass comprising the steps of:
S01. providing a glass melt, the glass melt comprising SiO2、Al2O3、CaO、MgO、Na2O and Fe2O3With SiO2Is calculated by 71.9 to 72.1 portions of Al2O31.25 to 1.35 portions of CaO, 8.65 to 8.75 portions of CaO, 3.35 to 3.45 portions of MgO and Na213.4 to 13.6 portions of O and Fe2O30.595 parts to 0.605 parts;
and S02, pouring the molten glass into a molten metal tank containing molten metal, and forming the molten glass on the surface of the molten metal to obtain the glass.
According to the preparation method of the glass, the components and the content of the glass liquid are adjusted, and the glass is prepared by adopting the float process, so that the softening point temperature and the hardening forming temperature of the glass are increased, the brightness degree of the obtained transmission stripes of the glass is uniform, the texture is clear, the glass quality is high, the quality of the glass automobile front windshield is favorably improved, and the preparation method has a good commercial prospect.
Wherein the molten glass in step S01 contains SiO2、Al2O3、CaO、MgO、Na2O and Fe2O3，SiO2、Al2O3、CaO、MgO、Na2O and Fe2O3The amount and the effect of the above are the same as those described in the above technical proposal of the glass. Further, the molten glass contains SO in addition to the above-listed components3、TiO2And K2O, likewise, SO3、TiO2And K2The amount and effect of O are the same as those described in the above glass technical means.
The molten glass can be prepared by a method conventionally known in the art, such as preparing a batch according to the chemical composition of molten glass, and feeding the batch into a melting furnace for melting by heating to form a fluid substance capable of continuously flowing into a molten metal bath.
In step S02, the molten glass is poured into a molten metal bath containing molten metal, and the molten glass is formed on the surface of the molten metal to obtain glass.
In the float process equipment, the inlet end of a molten metal tank is connected with a melting furnace for forming molten glass through a flow passage, the molten metal tank is sequentially divided into a high-temperature area, a medium-temperature area and a low-temperature area along the flow direction of the molten glass, and the molten glass is formed and hardened in the process of sequentially flowing to the high-temperature area, the medium-temperature area and the low-temperature area. In a specific embodiment, the molten metal is tin and the molten metal bath is a tin bath.
In some embodiments, a cooling water pack is provided in the high temperature zone of the molten metal bath. The cooling water drum is arranged in the high-temperature area to rapidly cool, promote the rapid forming and hardening of the glass ribbon, reduce the influence of the tin bath part on the transmission stripes of the glass in the float process and improve the quality of the transmission stripes of the glass.
Compared with the prior art, the quality of the glass transmission stripes is obviously improved and the glass quality rating grade is improved through the composition and the forming process of the glass, for example, the original quality rating grade is improved from 3.5-4.0 to 3.0-3.5, and the requirement of a customer on the glass quality is met; on the other hand, the glass forming is accelerated because the glass softening point temperature and the forming hardening temperature are increased, and meanwhile, because the glass forming temperature is reduced, the number of forming equipment is reduced, so that the production cost is greatly reduced.
In order that the details of the above-described practice and operation of the invention will be readily understood by those skilled in the art, and the advanced nature of the glass and method of making the same of the embodiments of the present invention will be apparent, the practice of the invention will now be illustrated by way of example.
Example 1
The embodiment provides a green glass sheet which is prepared by adopting a float process, and the preparation method comprises the following steps:
1) forming glass liquid, wherein the glass liquid comprises the following components in parts by weight based on 100 parts of the total weight of the glass liquid: SiO 2272 parts of Al2O31.3 parts, CaO 8.7 parts, MgO 3.4 parts, Na2O13.51 parts, K20.3 part of O and Fe2O30.6 part of SO30.17 part of TiO20.02 part;
2) arranging a cooling water bag in a high-temperature area of the tin bath; then, the molten glass is poured into a tin bath containing molten tin metal so that the molten glass is hardened and formed on the surface of the molten tin metal, and thereafter, the glass is collected.
Comparative example 1
The comparative example provides a green glass slide, made by the float process, the method of manufacture comprising the steps of:
1) forming glass liquid, wherein the glass liquid comprises the following components in parts by weight based on 100 parts of the total weight of the glass liquid: SiO 2271.5 parts of Al2O30.9 part, CaO 8.7 parts, MgO 4.0 parts, Na2O13.8 parts, K20.31 part of O, Fe2O30.6 part of SO30.17 part of TiO20.02 part;
2) the molten glass is poured into a tin bath containing molten tin metal so that the molten glass hardens and forms at the surface of the molten tin metal, after which the glass is collected.
The green glass plate obtained in example 1 and comparative example 1 was subjected to a performance test.
1. Table 1 shows the results of the test of the softening point temperature, the hardening and forming temperature, and the glass liquid clarifying and homogenizing temperature of the green glass original sheet of example 1 and comparative example 1, and as shown in the results, the softening point temperature and the hardening and forming temperature of the green glass original sheet are both increased by adjusting the composition of the glass and the forming process thereof, so as to promote the glass forming and hardening.
TABLE 1
2. The transmission fringe images of the green glass slide of example 1 and comparative example 1 were observed, and the quality rating of comparative example 1 was on a 3.5 to 4.0 scale and the quality rating of example 1 was on a 3.0 to 3.5 scale, indicating that the transmission fringe quality of example 1 was improved relative to comparative example 1.
Wherein, the quality rating standard of the partial glass transmission stripes is as follows:
3.0 grade: the stripes are obvious, the thickness is relatively uniform, and no obvious thick and bright stripes exist;
3.5 level: the stripes are obvious, the thickness is relatively uniform, and 1 thick bright stripe is formed;
4.0 grade: the stripes are obvious, the uniformity degree of the thickness is deviated, and 2-3 thick and bright stripes exist.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (8)
1. A glass, comprising: SiO 22、Al2O3、CaO、MgO、Na2O and Fe2O3；
With the SiO2Is 71.9 to 72.1 parts by weight of Al2O31.25 to 1.35 parts of CaO, 8.65 to 8.75 parts of CaO, 3.35 to 3.45 parts of MgO and Na2O is 13.4 to 13.6 portions, and the Fe2O30.595 parts to 0.605 parts.
2. The glass of claim 1, wherein the glass further comprises SO3And TiO2With said SiO271.9 to 72.1 parts by weight of the total amount of the component (A), the SO30.16 to 0.18 portion of the TiO20.01 to 0.03 portion.
3. The glass of claim 1, wherein the glass further comprises K2O, with said SiO2Is 71.9 to 72.1 parts by weight, the K20.3 to 0.4 portion of O.
4. The glass according to any one of claims 1 to 3, wherein the glass has a softening point temperature of greater than 725 ℃ and a setting temperature of greater than 915 ℃.
5. A method for preparing glass is characterized by comprising the following steps:
providing a glass melt, the glass melt comprising SiO2、Al2O3、CaO、MgO、Na2O and Fe2O3With said SiO2Is 71.9 to 72.1 parts by weight of Al2O31.25 to 1.35 parts of CaO, 8.65 to 8.75 parts of CaO, 3.35 to 3.45 parts of MgO and Na2O is 13.4 to 13.6 portions, and the Fe2O30.595 parts to 0.605 parts;
and flowing the molten glass into a molten metal tank containing molten metal, and forming the molten glass on the surface of the molten metal to obtain the glass.
6. The method according to claim 5, wherein the molten glass further contains SO3And TiO2With said SiO271.9 to 72.1 parts by weight of the total amount of the component (A), the SO30.16 to 0.18 portion of the TiO20.01 to 0.03 portion.
7. The method of claim 5, wherein the molten glass further comprises K2O, with said SiO2Is 71.9 to 72.1 parts by weight, the K20.3 to 0.4 portion of O.
8. The production method according to any one of claims 5 to 7, wherein a cooling water pack is provided in the high temperature zone of the molten metal bath.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010571956.2A CN111662010A (en) | 2020-06-22 | 2020-06-22 | Glass and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010571956.2A CN111662010A (en) | 2020-06-22 | 2020-06-22 | Glass and preparation method thereof |
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| Publication Number | Publication Date |
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| CN111662010A true CN111662010A (en) | 2020-09-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010571956.2A Pending CN111662010A (en) | 2020-06-22 | 2020-06-22 | Glass and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114212997A (en) * | 2021-11-30 | 2022-03-22 | 信义玻璃(天津)有限公司 | Preparation method of energy-saving glass |
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| CN114212997A (en) * | 2021-11-30 | 2022-03-22 | 信义玻璃(天津)有限公司 | Preparation method of energy-saving glass |
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