Environment-friendly high-refractive-index ultraviolet-permeable glass and preparation method thereof

A technology with high refractive index and outer glass, which is applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., can solve the problems of harsh preparation conditions of quartz glass, large difference in thermal expansion coefficient, and inability to seal the alloy. Achieve the effects of improving production and working conditions, good electrical insulation performance, and environmental protection

Active Publication Date: 2019-08-16
鲁米星特种玻璃科技股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these UV-transparent glasses are mainly concentrated in phosphate glass, fluoride glass and quartz glass materials, and the refractive index of these glass materials is generally less than 1.70, while phosphate glass and fluoride glass are due to their high thermal expansion coefficient, poor chemical stability, Low mechanical strength and other reasons cannot meet the sealing performance requirements of special glass; and although high-purity quartz glass has a transmittance of 91% at 254nm, the preparation conditions of quartz glass are harsh, and the thermal expansion coefficient is quite different from that of Kovar alloy. , cannot be directly sealed with Kovar alloy, which limits the scope of use, making its application also limited
And with the strengthening of our country's environmental protection concept and environmental protection in recent years, in the field of crop pest control and other application fields, the environmental protection requirements for glass materials are gradually increasing, but there are no reports on environmentally friendly UV-transparent glass materials.

Method used

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  • Environment-friendly high-refractive-index ultraviolet-permeable glass and preparation method thereof
  • Environment-friendly high-refractive-index ultraviolet-permeable glass and preparation method thereof
  • Environment-friendly high-refractive-index ultraviolet-permeable glass and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] An environment-friendly high-refractive-index ultraviolet-transmitting glass, consisting of the following components in percentage by weight:

[0040]

[0041]

[0042] Raw material requirements, quartz sand (high purity, 150 μm sieve content is less than 1%, 45 μm sieve content is less than 30%, Fe 2 o 3 content less than 1PPm), boric acid or boric anhydride (400μm sieve is less than 10%, 63μm sieve is less than 10%), basic magnesium carbonate (analytical pure), calcium carbonate (analytical pure, average particle size 250μm), Strontium carbonate (analytical pure, purity ≥ 99.0%), barium carbonate (analytical pure, purity ≥ 99.0%), zinc oxide (analytical pure), lanthanum trioxide (5N), niobium pentoxide (5N), dinitrogen pentoxide Tantalum (5N), calcium fluoride (analytically pure), and the main raw materials in the glass raw materials are subjected to iron removal treatment to improve the purity of the glass raw materials, and the oxides of variable valence elem...

Embodiment 2

[0050] An environment-friendly high-refractive-index ultraviolet-transmitting glass, consisting of the following components in percentage by weight:

[0051]

[0052]

[0053] This example uses the same raw materials and raw material requirements as in Example 1, and adopts a melting process system of melting at 1550° C. for 4 hours and the same test conditions as in Example 1. The basic properties of the samples are shown in Table 1. (1) The refractive index is 1.78; (2) When the glass thickness is 2.0mm, the wavelength is 350nm, and the ultraviolet light transmittance reaches 87%; (3) The average linear expansion coefficient of 30-300°C is 68×10 -7 / °C; (4) Chemical stability level II. The UV-transparent glass prepared in this example is suitable for sealing with Kovar alloy, and can be used in the manufacture of UV lamps, optical windows, UV spectrometers, optical instruments and camera lenses that require high UV-visible light transmittance, and can also be used Use...

Embodiment 3

[0055] An environment-friendly high-refractive-index ultraviolet-transmitting glass consists of the following components in percentage by weight:

[0056]

[0057]

[0058] This example uses the same raw materials and raw material requirements as in Example 1, and adopts a melting process system of melting at 1350° C. for 8 hours and the same test conditions as in Example 1. The basic properties of the samples are shown in Table 1. (1) The refractive index is 1.73; (2) When the glass thickness is 2.0mm, the wavelength is 350nm, and the ultraviolet light transmittance reaches 83%; (3) The average linear expansion coefficient of 30-300°C is 78×10 -7 / °C; (4) Chemical stability level II. The UV-transparent glass prepared in this example is suitable for sealing with Kovar alloy, and can be used in the manufacture of UV lamps, optical windows, UV spectrometers, optical instruments and camera lenses that require high UV-visible light transmittance, and can also be used Used a...

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Abstract

The invention discloses environment-friendly high-refractive-index ultraviolet-permeable glass and a preparation method thereof. The ultraviolet-permeable glass is prepared from the following components in percentage by weight: 30-40% of SiO2, 0.2-15% of B2O3, 0-5% of MgO, 6-10% of CaO, 0-5% of SrO, 2-10% of BaO, 1-5% of ZnO, 31-40% of La2O3, 0.01-2% of Nb2O5, 0.01-2% of Ta2O5 and 0.01-5% of CaF2.the preparation method comprises the following steps: carrying out iron removal treatment on the main raw materials, then weighing the high-purity raw materials according to weight percentages of thecomponents, carrying out ball-milling and uniform mixing to prepare a mixture, heating the mixture, then carrying out mixing, stirring the molten glass liquid for multiple times in a melting processof the glass mixed material, then taking out the glass molten liquid out from a furnace and quickly pouring the glass molten liquid into a preheated heat-resistant steel mold to obtain glass with a specified specification by pouring, then putting the glass into an annealing furnace for annealing treatment, and carrying out cooling to obtain the environment-friendly high-refractive-index ultraviolet-permeable glass material. The ultraviolet-permeable glass has the advantages of environmental protection, high refractive index, high ultraviolet transmittance, appropriate thermal expansion coefficient, good chemical stability and simple preparation method, and has a wide market application prospect.

Description

technical field [0001] The invention relates to the technical field of special glass materials and their preparation, in particular to an environment-friendly high-refractive-index ultraviolet-transmitting glass and a preparation method thereof. Background technique [0002] There have been many studies on UV-transparent glass at home and abroad. The material of UV-transparent glass has good uniformity, controllable geometric shape and low price. It is the first choice for electric vacuum tubes such as side window photoelectric tubes. my country has already UV-transparent glass materials have been developed, and are widely used in civil and military applications. For example, they can be used to detect the characteristic ultraviolet rays of missile engine flames, and can be used as optical windows to establish solar-blind ultraviolet missile warning systems. The quality of the system equipment is small, and false alarms Low rate, high reliability; can also be used in grid safe...

Claims

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Application Information

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IPC IPC(8): C03C3/068C03C4/08C03B19/02
CPCC03C3/068C03C4/08C03B19/02
Inventor 陈玉栋陈嘉慧张芬香
Owner 鲁米星特种玻璃科技股份有限公司
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