Borosilicate glass suitable for electric light source

A borosilicate glass and borosilicate glass technology, which is applied in the field of glass materials, can solve the problems of corrosion of furnace refractories, deterioration of glass strength and performance, and non-compliance with environmental protection requirements, etc., and achieves long frit properties and low forming. Temperature starting point, effect of good UV absorption performance

Inactive Publication Date: 2009-05-13
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
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  • Claims
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Problems solved by technology

It will naturally lead to poor anti-exposure performance. At the same time, arsenic oxide and antimony oxide are also restricted glass components, which do not meet environmental protection requirements.
Electric light source glass generally needs to be thermally processed for many times in the process of making lamps. When the temperature is higher than the softening point of the glass, if sulfate is used as the clarifier, the interior of the glass will be affected by residual SO 3 And generate small bubbles, or even larger bubbles, resulting in deterioration of the strength and performance of the glass
If fluoride is used as a clarifier, it will cause greater erosion to the refractory material of the kiln, and the clarification efficiency is low, and at the same time it will cause environmental pollution

Method used

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  • Borosilicate glass suitable for electric light source

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The present invention is described based on the embodiments, and Table 1 is the composition and performance of the embodiments of the present invention and comparative examples. First, select the raw material according to the glass composition of Example 1 in Table 1, the raw material requirements, quartz sand (150 μm oversize is less than 1%, 45 μm undersize is less than 30%), aluminum hydroxide or aluminum oxide (average particle size 50 μm) , boric acid or borax (400μm sieve is less than 10%, 63μm sieve is less than 10%), calcium carbonate (average particle size 250μm), strontium carbonate (average particle size 20μm) sieve is less than 1%, 50μm ) undersize is 5% or less), barium carbonate (average particle size 50 μm), zinc oxide (average particle size 10 μm oversize is 1% or less), as other glass components, reagent grade magnesium carbonate, magnesium oxide, Sodium Chloride, Ammonium Chloride, Barium Chloride, Zinc Chloride, Lithium Carbonate, Lithium Hydroxide, S...

Embodiment 2

[0060] The actual composition of the glass refers to Example 2 in Table 1. According to the chemical composition of the glass in Example 2 in Table 1, for every 300g of glass liquid prepared, 205.5g of quartz sand, 18.9g of borax, 78.6g of boric acid, 13.8g of aluminum hydroxide, hydrogen Lithium oxide 3g, potassium carbonate 26.3g, titanium oxide 10.7g. The clarifying agent selected is calcium chloride and tin oxide, and the consumption of calcium chloride is 0.15g, and the consumption of tin oxide is 0.75g, and the consumption of potassium nitrate is 7.5g, makes its batching meet the glass chemical composition of table 1 embodiment 2, uses and The same preparation process and evaluation method as in Example 1, the basic properties of the samples are shown in Table 1.

[0061] On the whole, compared with Comparative Example, Example 2 has a good glass clarification effect, the number of bubbles per 100 grams of glass is less than 1, has good visible light transmittance, good ...

Embodiment 3

[0063]According to the glass chemical composition of Example 3 in Table 1, for every 300g of molten glass prepared, 166.5g of quartz sand, 23.6g of borax, 52g of boric acid, 11.7g of aluminum hydroxide, 18g of lithium hydroxide, 35.9g of potassium carbonate, calcium carbonate 16.4g, magnesium oxide 6.2g, barium carbonate 11.9g, strontium carbonate 12.4g, zirconium silicate 4.7g, zinc oxide 6.1g, titanium oxide 4.5g. The clarifying agent selected is tin oxide, the amount of tin oxide is 3g, and the amount of sodium nitrate is 12g, so that its ingredients meet the glass chemical composition of Example 3 in Table 1, using the same preparation process and evaluation method as in Example 1, shown in Table 1 The basic performance of the sample.

[0064] On the whole, compared with Comparative Example, Example 3 has a better glass clarification effect, the number of bubbles per 100 grams of glass is less than 1, has good visible light transmittance, good ultraviolet blocking properti...

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Abstract

The invention provides glass applicable to electric light source, which belongs to the field of borosilicate glass, in particular to a high-precision small-diameter glass tube through a public known pull tube forming process by using an environment-friendly fining agent to realize good melting quality, so as to meet the requirement of electric light source mechanical light manufacture. The swell factor of the glass is (38-76) multiplies 10<-7>/DEG C to fulfill sealing of tungsten, molybdenum and raft. The glass consists of the following chemical compositions in weight percentage: 55 to 75 percent of SiO2, 5 to 22 percent of B2O3, 2 to 6 percent of Al2O3, 0 to 8 percent of MgO, CaO, BaO and SrO, 5 to 12 percent of Li2O, Na2O and K2O, 0 to 1 percent of ZrO2, 0.5 to 4 percent of TiO2, 0 to 2 percent of ZnO, 0 to 1 percent of SnO 2, and 0 to 0.5 percent of Cl2. The glass is characterized by the borosilicate glass system. The glass product has the advantages of high transmission of visible light, ultraviolet resisting property and insolation resisting property without harmful elements.

Description

technical field [0001] The invention relates to glass materials used as electric light source products (cold cathode lamps, fluorescent lamps, halogen lamps, mercury lamps, sodium lamps). The glass can achieve better melting quality through a special clarifying agent. High-precision glass tubes, glass shells, and glass covers are prepared through known tube drawing, blowing, and pressing forming processes. Background technique [0002] Human research on electric light sources began at the end of the 18th century. Along with the development of electric light sources, the varieties of electric light source glass are also in the process of continuous improvement and development. As the electric light source has entered a new era of miniaturization, energy saving, electronics, environmental protection, and long-term effect, it can only be realized if the electric light source glass keeps up with it. [0003] Existing electric light sources can be divided into three types: therm...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/091C03C3/093C03C3/11
Inventor 田英良孙诗兵邹玉林严建华庞建张港
Owner BEIJING UNIV OF TECH
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