CN110981191A - Titanium oxide-based lead-free crystal glass and preparation method thereof - Google Patents
Titanium oxide-based lead-free crystal glass and preparation method thereof Download PDFInfo
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- CN110981191A CN110981191A CN202010014286.4A CN202010014286A CN110981191A CN 110981191 A CN110981191 A CN 110981191A CN 202010014286 A CN202010014286 A CN 202010014286A CN 110981191 A CN110981191 A CN 110981191A
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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
- C03C3/095—Glass compositions containing silica with 40% to 90% silica, by weight containing rare earths
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- 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
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- Engineering & Computer Science (AREA)
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Abstract
The invention discloses titanium oxide-based lead-free crystal glass and a preparation method thereof, aims to optimize the composition of the existing crystal glass, and provides the titanium oxide-based lead-free crystal glass and the preparation method thereof. The invention optimizes and improves the refractive index, density and chemical stability of the crystal glass by doping metal oxide on the basis of the original production process. The preparation process of the invention comprises the following steps: proportioning, mixing, smelting, forming and annealing. The doped titanium oxide can improve the density, the refractive index and the chemical stability of the crystal glass.
Description
Technical Field
The invention relates to lead-free crystal glass, in particular to titanium oxide-based lead-free crystal glass and a preparation method thereof.
Background
The traditional crystal glass mainly contains lead, has the outstanding advantages of excellent chemical stability, higher mechanical reliability, lower glass transition temperature and the like, is widely applied to manufacturing glass jewelry products, high-grade tableware, wine sets, decorative materials and the like, and shows huge development prospect. However, with the development of technology and the increasing awareness of environmental protection, the problem of lead elution in lead-containing crystal glass has attracted much attention. In consideration of human health, the development of lead-free crystal glass is urgently needed.
The lead-free crystal glass is prepared by replacing lead oxide with one or more mixed components of oxides, and the physical and chemical properties of the lead-free crystal glass are adjusted by the mixing effect of the components in the glass, so that the lead-free crystal glass has functions similar to those of lead-containing crystal glass. As an environment-friendly glass, the lead-free crystal glass fundamentally solves the problem of lead dissolution in the use process of the lead-containing crystal glass. However, the physical and chemical properties such as density, refractive index and chemical stability of lead-free crystal glass are still lower than those of lead-containing crystal glass, and the development of lead-free crystal glass is restricted. Therefore, the selection of proper oxide to replace lead oxide is the key to preparing the lead-free crystal glass. The titanium oxide doped in the invention is a non-toxic oxide with high refractive index and high density, has very similar physicochemical properties with lead oxide, and has better chemical stability.
Based on the reasons, the invention designs the titanium oxide-based lead-free crystal glass and the preparation method thereof.
Disclosure of Invention
The invention aims to solve the problem of high lead content in the traditional lead crystal glass, and provides titanium oxide-based lead-free crystal glass and a preparation method thereof.
(1) Material preparation and material mixing: the following components are mixed according to mass percentage, namely SiO260~70%、Na2O 5~8%、K2O 2~5%、CaO 3~5%、ZnO 5~10%、BaO 2~8%、Al2O31~3%、La2O32-5%; the doped titanium oxide accounts for 5 percent, 10 percent and 15 percent by mass; ball milling and mixing by a wet method after burdening; drying and crushing the mixture;
(2) smelting: smelting the mixed powder obtained in the step (1) at 1500 ℃ until a solution is clarified and homogenized to obtain glass melt;
(3) molding: pouring the glass melt obtained in the step (2) into a mold preheated to 520 ℃ for molding;
(4) annealing: transferring the glass formed in the step (3) to an annealing furnace heated to 520 ℃ for annealing, preserving the heat for 2 hours, and naturally cooling to room temperature;
(5) and (4) polishing, cleaning and drying the glass obtained in the step (4) to obtain the titanium oxide-based lead-free crystal glass.
The invention can obtain the lead-free crystal glass with high refractive index, high density and good chemical stability.
Detailed Description
Example 1:
(1) material preparation and material mixing: the following components are mixed according to mass percentage, namely SiO2~60%、Na2O ~5%、K2O ~5%、CaO ~6%、ZnO ~10%、BaO ~8%、Al2O3~3%、La2O3~3%、TiO25 percent; after the materials are mixed, absolute ethyl alcohol is used as a ball milling medium, and ball milling and mixing are carried out for 8 hours at the rotating speed of 250 rpm/min; drying and crushing the mixture;
(2) smelting: smelting the mixed powder obtained in the step (1), wherein the smelting temperature control program is that the temperature rising rate is 2 ℃ per minute from 20 ℃ to 400 ℃, the temperature rising rate is 5 ℃ per minute from 400 ℃ to 1200 ℃, the temperature rising rate is 1 ℃ per minute from 1200 ℃ to 1500 ℃, and the temperature is kept for 2 hours until the solution is clarified and homogenized to obtain glass melt;
(3) molding: pouring the glass melt obtained in the step (2) into a mold preheated to 520 ℃ for molding;
(4) annealing: transferring the glass formed in the step (3) to an annealing furnace heated to 520 ℃ for annealing, preserving the heat for 2 hours, and naturally cooling to room temperature;
(5) and (4) polishing, cleaning and drying the glass obtained in the step (4) to obtain the titanium oxide-based lead-free crystal glass.
The invention can obtain the lead-free crystal glass with high refractive index, high density and good chemical stability.
Example 2:
(1) material preparation and material mixing: the following components are mixed according to mass percentage, namely SiO2~60%、Na2O ~5%、K2O ~5%、CaO ~6%、ZnO ~10%、BaO ~8%、Al2O3~3%、La2O3~3%、TiO210 percent; after burdeningUsing absolute ethyl alcohol as a ball milling medium, and carrying out ball milling and mixing for 8 hours at the rotating speed of 250 rpm/min; drying and crushing the mixture;
(2) smelting: smelting the mixed powder obtained in the step (1), wherein the smelting temperature control program is that the temperature rising rate is 2 ℃ per minute from 20 ℃ to 400 ℃, the temperature rising rate is 5 ℃ per minute from 400 ℃ to 1200 ℃, the temperature rising rate is 1 ℃ per minute from 1200 ℃ to 1500 ℃, and the temperature is kept for 2 hours until the solution is clarified and homogenized to obtain glass melt;
(3) molding: pouring the glass melt obtained in the step (2) into a mold preheated to 520 ℃ for molding;
(4) annealing: transferring the glass formed in the step (3) to an annealing furnace heated to 520 ℃ for annealing, preserving the heat for 2 hours, and naturally cooling to room temperature;
(5) and (4) polishing, cleaning and drying the glass obtained in the step (4) to obtain the titanium oxide-based lead-free crystal glass.
The invention can obtain the lead-free crystal glass with high refractive index, high density and good chemical stability.
Example 3:
(1) material preparation and material mixing: the following components are mixed according to mass percentage, namely SiO2~60%、Na2O ~5%、K2O ~5%、CaO ~6%、ZnO ~10%、BaO ~8%、Al2O3~3%、La2O3~3%、TiO215 percent; after the materials are mixed, absolute ethyl alcohol is used as a ball milling medium, and ball milling and mixing are carried out for 8 hours at the rotating speed of 250 rpm/min; drying and crushing the mixture;
(2) smelting: smelting the mixed powder obtained in the step (1), wherein the smelting temperature control program is that the temperature rising rate is 2 ℃ per minute from 20 ℃ to 400 ℃, the temperature rising rate is 5 ℃ per minute from 400 ℃ to 1200 ℃, the temperature rising rate is 1 ℃ per minute from 1200 ℃ to 1500 ℃, and the temperature is kept for 2 hours until the solution is clarified and homogenized to obtain glass melt; (3) molding: pouring the glass melt obtained in the step (2) into a mold preheated to 520 ℃ for molding;
(4) annealing: transferring the glass formed in the step (3) to an annealing furnace heated to 520 ℃ for annealing, preserving the heat for 2 hours, and naturally cooling to room temperature;
(5) and (4) polishing, cleaning and drying the glass obtained in the step (4) to obtain the titanium oxide-based lead-free crystal glass.
The invention can obtain the lead-free crystal glass with high refractive index, high density and good chemical stability.
The results of the performance test of the lead-free crystal glass prepared by the invention are shown in Table 1.
TABLE 1
Claims (6)
1. The titanium oxide-based lead-free crystal glass and the preparation method thereof are characterized by comprising the following basic components in percentage by mass: SiO 2260~70%、Na2O 5~8%、K2O 2~5%、CaO 3~5%、ZnO 5~10%、BaO 2~8%、Al2O31~3%、La2O32-5%; the doped titanium oxide is 5%, 10% and 15% by mass.
2. SiO as claimed in claim 12Characterized by a particle size of about 250 mesh.
3. The titania-based lead-free crystal glass according to claim 1, comprising the steps of:
(1) material preparation and material mixing: the following components are mixed according to mass percentage, namely SiO260~70%、Na2O 5~8%、K2O 2~5%、CaO 3~5%、ZnO 5~10%、BaO 2~8%、Al2O31~3%、La2O32-5%; the doped titanium oxide accounts for 5 percent, 10 percent and 15 percent by mass; ball milling and mixing by a wet method after burdening; drying and crushing the mixture;
(2) smelting: smelting the mixed powder obtained in the step (1) at 1500 ℃ until a solution is clarified and homogenized to obtain glass melt;
(3) molding: pouring the glass melt obtained in the step (2) into a mold preheated to 520 ℃ for molding;
(4) annealing: transferring the glass formed in the step (3) to an annealing furnace heated to 520 ℃ for annealing, preserving the heat for 2 hours, and naturally cooling to room temperature;
(5) and (4) polishing, cleaning and drying the glass obtained in the step (4) to obtain the titanium oxide-based lead-free crystal glass.
4. The titania-based lead-free crystal glass and the preparation method thereof according to claim 3, wherein the wet ball milling mixing in the step (1) is performed, the glass components are respectively weighed according to the mass ratio, and ball milling is performed for 8 hours at a rotation speed of 250rpm/min by using absolute ethyl alcohol as a medium.
5. The titania-based lead-free crystal glass and the preparation method thereof according to claim 3, wherein the melting temperature control procedure in the step (2) is as follows: the temperature rise rate of 20 ℃ to 400 ℃ is 2 ℃/min, the temperature rise rate of 400 ℃ to 1200 ℃ is 5 ℃/min, the temperature rise rate of 1200 ℃ to 1500 ℃ is 1 ℃/min, and the temperature is kept for 2 hours.
6. The titania-based lead-free crystal glass according to claim 3, wherein the mold in the step (3) is a graphite mold.
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| CN202010014286.4A CN110981191A (en) | 2020-01-07 | 2020-01-07 | Titanium oxide-based lead-free crystal glass and preparation method thereof |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1029830A1 (en) * | 1999-02-19 | 2000-08-23 | Schott Glas | Translucent or opaque glass ceramic with high quartz mixed crystals as predominant crystal phase and its use |
| CN101356127A (en) * | 2006-05-19 | 2009-01-28 | 东洋佐佐木玻璃股份有限公司 | Crystal glass article |
| CN102659314A (en) * | 2012-04-27 | 2012-09-12 | 中南大学 | Barium oxide based crystal lead-free glass and preparation method thereof |
| CN103524042A (en) * | 2013-09-24 | 2014-01-22 | 河北省沙河玻璃技术研究院 | Environment-friendly type high-transmission high-refractivity crystalline glass and preparation method thereof |
-
2020
- 2020-01-07 CN CN202010014286.4A patent/CN110981191A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1029830A1 (en) * | 1999-02-19 | 2000-08-23 | Schott Glas | Translucent or opaque glass ceramic with high quartz mixed crystals as predominant crystal phase and its use |
| CN101356127A (en) * | 2006-05-19 | 2009-01-28 | 东洋佐佐木玻璃股份有限公司 | Crystal glass article |
| CN102659314A (en) * | 2012-04-27 | 2012-09-12 | 中南大学 | Barium oxide based crystal lead-free glass and preparation method thereof |
| CN103524042A (en) * | 2013-09-24 | 2014-01-22 | 河北省沙河玻璃技术研究院 | Environment-friendly type high-transmission high-refractivity crystalline glass and preparation method thereof |
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Application publication date: 20200410 |