CN1600720A - Crown glass in use for discharge lamp in low pressure - Google Patents
Crown glass in use for discharge lamp in low pressure Download PDFInfo
- Publication number
- CN1600720A CN1600720A CN 200410067162 CN200410067162A CN1600720A CN 1600720 A CN1600720 A CN 1600720A CN 200410067162 CN200410067162 CN 200410067162 CN 200410067162 A CN200410067162 A CN 200410067162A CN 1600720 A CN1600720 A CN 1600720A
- Authority
- CN
- China
- Prior art keywords
- glass
- low pressure
- discharge lamp
- crown glass
- discharging lamp
- 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.)
- Pending
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
- C03C3/076—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
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
The invention is a leadless glass used for low pressure discharging lamp, its basic component consists of inorgaric oxides of SiO2, K2O, Na2O, Al2O3, CaO, MgO, B2O3, CeO2, Fe2O3, BaO and SrO etc. on proper weight ratio, it can be produced by prior glass prodn, device and technology. The soften temp, of said leadless glass is similar to chadional lead glass used for low pressure discharging lamp. So the glass can not only be used as arc material of low pressure discharging lamp, but also stem material used for electrode sealing.
Description
Technical field
The invention belongs to the electric light source technology field, be specifically related to the low melting glass of the plumbous composition of a kind of non-oxidation.
Background technology
Low-pressure discharge lamp is widely used in interior lighting.Be generally used for making in the glass tube of low-pressure discharge lamp, all contain a certain proportion of plumbous oxide.The adding of plumbous oxide can reduce the softening temperature and the melting temperature of Glass tubing, thus but save energy and minimizing manufacturing cost.But the lead in the Glass tubing (poisonous) composition can cause very big environmental pollution, and human beings'health is brought threat.Therefore, using the Glass tubing of unleaded composition to make low-pressure discharge lamp, will be the inevitable development trend of such light source.
Summary of the invention
The object of the present invention is to provide a kind of Unlead low-smelting point glass that is used to make low-pressure discharge lamp, to avoid of the harm of deleterious lead to global environment.
Another object of the present invention is to need not to change original production unit and production technique, prepare low-pressure discharge lamp with regard to available crown glass provided by the invention.
Glass material provided by the invention, its softening temperature (Tsoft) and tradition have the close of lead glass as low-pressure discharge lamp.
Crown glass provided by the invention both can be used as the arctube material of low-pressure discharge lamp, can be used as electrode sealing-in core column material again.
According to the present invention, can achieve the above object with the inorganic oxide compositions (prescription) that contains following base stock.Its base stock is expressed as with weight percent:
SiO
2 62.0-68.0％
K
2O 5.0-7.0％
Na
2O 10.0-15.0％
Al
2O
3 0-4.3％
CaO 2.5-6.2％
MgO 1.5-4.0％
B
2O
3 2.0-3.2％
CeO
2 0.1-0.4％
Fe
2O
3 0-0.20％
BaO 0-10.4％
SrO 0-4.0％。
The each component total amount satisfies 100%.
The glass that the present invention proposes can utilize the production unit and the production technique of original glass.Need not to change, can produce.
The average coefficient of expansion α of above-mentioned glass between 25 ℃ and 300 ℃
25: 300tBe 103 ± 3.Be to be noted that glass, there is no in the former relevant patent and reported with this characteristic.
Embodiment
The invention is further illustrated by the following examples, but be not limited to this embodiment.
Embodiment 1
1, component (by weight):
SiO
2 63.8
K
2O 6.0
Na
2O 11.0
CaO 2.7
MgO 1.8
B
2O
3 2.5
CeO
2 0.1
BaO 9.0
SrO 3.0
2, coefficient of expansion α
25: 300t(* 10
-7): be 102
3, softening temperature (℃): 640
4, density p (g/cm
3): 2.50
Embodiment 2
1, component (by weight):
SiO
2 65.12
K
2O 6.0
Na
2O 14.0
Al
2O
3 3.0
CaO 5.4
MgO 3.6
B
2O
3 2.5
CeO
2 0.28
Fe
2O
3 0.1
2, coefficient of expansion α
25: 300t(* 10
-7) be 102
3, softening temperature (℃): 660
4, density p (g/cm
3): 2.55
Embodiment 3
1, component (by weight:
SiO
2 63.8
K
2O 6.0
Na
2O 11.0
Al
2O
3 2.0
CaO 2.7
MgO 1.8
B
2O
3 2.5
CeO
2 0.15
Fe
2O
3 0.05
BaO 7.0
SrO 3.0
2, coefficient of expansion α
25: 300t(* 10
-7) be 102
3, softening temperature (℃): 650
4, density p (g/cm
3): 2.52
Claims (1)
1, a kind of crown glass in use for discharge lamp in low pressure is characterized in that by weight percentage, and the each component proportioning is as follows:
SiO
2 62.0-68.0％
K
2O 5.0-7.0％
Na
2O 10.0-15.0％
Al
2O
3 0-4.3％
CaO 2.5-6.2％
MgO 1.5-4.0％
B
2O
3 2.0-3.2％
CeO
2 0.1-0.4％
Fe
2O
3 0-0.20％
BaO 0-10.4％
SrO 0-4.0％
Total amount satisfies 100%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410067162 CN1600720A (en) | 2004-10-14 | 2004-10-14 | Crown glass in use for discharge lamp in low pressure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410067162 CN1600720A (en) | 2004-10-14 | 2004-10-14 | Crown glass in use for discharge lamp in low pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1600720A true CN1600720A (en) | 2005-03-30 |
Family
ID=34666552
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410067162 Pending CN1600720A (en) | 2004-10-14 | 2004-10-14 | Crown glass in use for discharge lamp in low pressure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1600720A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107572779A (en) * | 2017-09-18 | 2018-01-12 | 安徽鑫民玻璃股份有限公司 | A kind of Unlead low-smelting point coloured glass and its preparation technology |
-
2004
- 2004-10-14 CN CN 200410067162 patent/CN1600720A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107572779A (en) * | 2017-09-18 | 2018-01-12 | 安徽鑫民玻璃股份有限公司 | A kind of Unlead low-smelting point coloured glass and its preparation technology |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20050330 |