GB964238A - High refractive index glass - Google Patents
High refractive index glassInfo
- Publication number
- GB964238A GB964238A GB4675062A GB4675062A GB964238A GB 964238 A GB964238 A GB 964238A GB 4675062 A GB4675062 A GB 4675062A GB 4675062 A GB4675062 A GB 4675062A GB 964238 A GB964238 A GB 964238A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bao
- oxides
- tio2
- added
- high refractive
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- 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
- C03C3/062—Glass compositions containing silica with less than 40% silica by weight
- C03C3/064—Glass compositions containing silica with less than 40% silica by weight containing boron
- C03C3/066—Glass compositions containing silica with less than 40% silica by weight containing boron containing zinc
-
- 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
-
- 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
- C03C3/062—Glass compositions containing silica with less than 40% silica by weight
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
Abstract
A glass composition consists essentially of, by weight, 32 to 37% TiO2, 30% to 49% of at least one of the oxides BaO and ZnO not less than 30% being BaO, 3.5 to 4.5 of at least one of the oxides CaO and MgO, 0 to 2.5% of at least one of the oxides Na2O, K2O and Li2O, and 12% to 21% of at least one of the oxides SiO2, Al2O3 and B2O3. Fluorides may be added to assist in fluxing the glass. Melting must be effected in an oxidizing atmosphere and nitrates, for example, are preferably added to the batch materials to provide extra oxygen. The Ba, Ca and Na may be added as carbonates. The compositions of the invention have high refractive indices and surface tensions which make them particularly suitable for forming reflective glass beads and flakes. Their properties are compared with two prior art compositions: (1) 32.6% TiO2, 55.8% BaO, 11.6% B2O3 and (2) 37.8% TiO2, 37.2% BaO, 19.7% B2O3, 5.1% ZnO, both in per cent by weight.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US16852862A | 1962-01-24 | 1962-01-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB964238A true GB964238A (en) | 1964-07-22 |
Family
ID=22611862
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4675062A Expired GB964238A (en) | 1962-01-24 | 1962-12-11 | High refractive index glass |
Country Status (5)
| Country | Link |
|---|---|
| CH (1) | CH417865A (en) |
| DE (1) | DE1421853B2 (en) |
| DK (1) | DK105078C (en) |
| GB (1) | GB964238A (en) |
| NL (2) | NL121577C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104860535A (en) * | 2015-05-05 | 2015-08-26 | 江油市明瑞反光材料科技有限公司 | Production process of large sizes and high refraction of glass beads |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2555633C2 (en) * | 1975-12-08 | 1982-06-09 | Minnesota Mining and Manufacturing Co., 55133 Saint Paul, Minn. | Colorless transparent glass microspheres based on TiO 2 -BaO- (ZnO-SiO 2) having a relatively high refractive index and their use |
| DE102013105177A1 (en) | 2013-05-21 | 2014-11-27 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Process for obtaining metallic fractions and metal-depleted material from metal-containing materials |
-
0
- NL NL288052D patent/NL288052A/xx unknown
- NL NL121577D patent/NL121577C/xx active
-
1962
- 1962-12-10 DE DE19621421853 patent/DE1421853B2/en active Pending
- 1962-12-11 GB GB4675062A patent/GB964238A/en not_active Expired
-
1963
- 1963-01-23 CH CH78163A patent/CH417865A/en unknown
- 1963-01-23 DK DK31863A patent/DK105078C/en active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104860535A (en) * | 2015-05-05 | 2015-08-26 | 江油市明瑞反光材料科技有限公司 | Production process of large sizes and high refraction of glass beads |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1421853A1 (en) | 1968-11-07 |
| DK105078C (en) | 1966-08-15 |
| DE1421853B2 (en) | 1970-04-09 |
| CH417865A (en) | 1966-07-31 |
| NL121577C (en) | |
| NL288052A (en) |
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