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Ultra-low-sodium lead-free glass and applications thereof

A lead-free glass, extremely low technology, applied in the field of energy-saving lamp light source materials, can solve the problems that glass cannot be used, and achieve the effect of improving luminous flux maintenance rate and minimizing light decay

Inactive Publication Date: 2012-06-20
SHANGHAI YAMING LIGHTING
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0004] In U.S. Patent No. 4,666,871, a glass for an extremely low-sodium lamp tube is described, and its sodium content is 0-1.3% (weight ratio), but this glass contains 5% PbO, which makes the glass unusable in the current domestic and foreign markets

Method used

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  • Ultra-low-sodium lead-free glass and applications thereof
  • Ultra-low-sodium lead-free glass and applications thereof
  • Ultra-low-sodium lead-free glass and applications thereof

Examples

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preparation example Construction

[0040] The preparation conditions of the very low sodium lead-free frit glass of embodiment 1 and 2 are as follows:

[0041] After mixing the ingredients evenly according to the chemical ratio of the components in the ultra-low-sodium lead-free glass, put the mixture into the alumina crucible, first raise the temperature to 1700°C, and then drop it to 1550-1610°C after 10 hours. Keep the temperature for 10 hours, and then slowly lower the temperature to complete the production of the glass sample, wherein the cooling rate is 80°C / hour. Too fast cooling rate will lead to the formation of crystal grains in the glass, and the complete glass block cannot be obtained. The glass tubes used in making lamps need to be rotated and pulled out by a tube pulling machine in the molten glass. The diameter and wall thickness of the glass tube are determined by the pulling and spinning speeds. The temperature distribution in the furnace and the temperature distribution at the outlet of the ...

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Abstract

The invention belongs to the technical field of the energy-saving light source material and relates to ultra-low-sodium lead-free glass and applications thereof. The sodium content of the ultra-low-sodium lead-free glass is below 0.5% and above 0.23%, thus the lumen maintenance of the lamp tube is extremely improved in the use process, the luminous decay of the lamp tube is minimized, the effect of extremely high lumen maintenance is realized without adopting protective film coating, the cost is saved and the coating difficulty of the fluorescent powder is reduced. The ultra-low-sodium lead-free glass does not contain As2O3 and Sb2O3; the content of PbO is extremely low, which is below 0.012%, thus the product belongs to lead-free glass; and the weight percent of CeO2 is not zero and the glass material meets the Rohs environmental protection standard. The ultra-low-sodium lead-free glass can be widely used to prepare various electronic luminous bodies such as fluorescent lamp tubes or energy saving lamp tubes.

Description

technical field [0001] The invention belongs to the technical field of energy-saving light source materials, and relates to an extremely low-sodium lead-free glass for energy-saving lamps (a glass material that meets the requirements of environmental protection and prevents output of ultraviolet radiation) and the prepared electronic luminous body such as energy-saving lamps or fluorescent lamps . Background technique [0002] Low-pressure mercury discharge light source, that is, fluorescent light source, has been widely used in various civil lighting and professional lighting occasions, and has become a necessity in daily life. From 1995 to 2010, low-sodium lead-free glass was widely produced and used, enabling the green and harmless fluorescent light source to be realized. The bulb material of this light source has hitherto always contained not less than 6.0% Na 2 O. The presence of sodium oxide makes the luminous flux maintenance rate of fluorescent tubes remain high. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/105C03C3/095H01J61/30
CPCC03C3/087C03C3/085C03C3/105
Inventor 潘佩聪
Owner SHANGHAI YAMING LIGHTING
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