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Leadless glass fit for machining energy-saving tube

A technology of lead-free glass and energy-saving lamps, applied in the field of lead-free glass, can solve the problems of increasing glass viscosity, high clarification, homogenization temperature, easy to produce streaks, etc., and achieve the effect of improving melting performance and improving physical and chemical properties

Inactive Publication Date: 2005-03-16
上海孟仕玻璃有限公司
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Problems solved by technology

However, the negative impact is relatively large, which increases the viscosity of the glass, which affects the homogenization of the glass during the melting process, and tends to produce streaks during the melting and drawing process. Therefore, a higher clarification and homogenization temperature is still required. bad for saving energy

Method used

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  • Leadless glass fit for machining energy-saving tube

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Embodiment 1～2 and comparative example 1～6

[0020] The formula and main physical and chemical properties are shown in Table 1.

[0021] Among them: "Comparative Example 1" is a commonly used domestic lime glass, "Comparative Example 2" is a commonly used domestic light lead glass, "Comparative Example 3" is a Chinese patent 99118719.9, and "Comparative Example 4" is a Chinese patent 99102177.0. "Proportion 5" is Chinese patent 97115360.4, and "Comparative Example 6" is Chinese patent 93112860.9

[0022] In the glass components of Comparative Examples 3, 4, 5, and 6, the common point is that the divalent alkaline earth metals (CaO, MgO) are above 3.2%. As the content of alkaline earth metals increases, the softening temperature rises accordingly, and the glass frit The performance becomes shorter, which increases the difficulty of thermal processing operations, and increases the rejection rate of thermal processing procedures, which affects the production qualification rate of energy-saving lamp glass tubes to a certain exte...

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Abstract

The invention provides a leadless glass suitable for machining energy-saving tube characterized by, (1) containing no lead, strontium, magnesium and low calcium content, (2) possessing fine hot-working character, (3) suitable for the heat working of screw type energy conservation lamp outer cover glass with complex profiles.

Description

Technical field [0001] The invention relates to a glass used for energy-saving lamp tubes, in particular to a lead-free glass. Background technique [0002] For a long time, because electric light source glass requires higher dielectric properties, and PbO can make the glass have higher dielectric properties, and at the same time, it can reduce the softening temperature of the glass and make the material longer, which is beneficial to the thermal processing of the glass. Leaded glass has been widely used as a glass material for electric light sources. However, leaded glass not only causes serious pollution to the environment in the process of glass melting and lamp making, and its waste after use. Therefore, from the perspective of environmental protection, people are working hard to reduce and eliminate the lead content in electric light source glass. [0003] Both Chinese patent 93112860.9 and Chinese patent 99102177.0 disclose a lead-free barium glass for electric light source...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/087C03C3/095
CPCC03C3/085C03C3/083C03C3/087C03C3/097C03C3/095C03C3/091
Inventor 葛君夷
Owner 上海孟仕玻璃有限公司
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