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An environmentally friendly transparent deep ultraviolet borosilicate glass and its preparation method and application

A silicate glass, ultraviolet boron technology, applied in glass manufacturing equipment, glass molding, manufacturing tools and other directions, can solve the problems of inability to meet the requirements of deep UV detection and low transmittance

Active Publication Date: 2021-09-28
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Foreign UV-transparent glass material products mainly include Schott’s 8337B from Germany and Corning’s 9471 UV-transparent glass material from the United States, and their thermal expansion coefficients are (48~55)×10 -7 / °C, the transmittance of the two at 200nm is 40% and 35% respectively (thickness 1mm), and the transmittance at 185nm is even lower, which is far from meeting the detection requirements of deep ultraviolet penetration

Method used

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  • An environmentally friendly transparent deep ultraviolet borosilicate glass and its preparation method and application
  • An environmentally friendly transparent deep ultraviolet borosilicate glass and its preparation method and application
  • An environmentally friendly transparent deep ultraviolet borosilicate glass and its preparation method and application

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preparation example Construction

[0041] The present invention also provides a preparation method of environment-friendly deep ultraviolet penetrating borosilicate glass, comprising the following steps:

[0042] (1) Iron removal, dehydration and conversion: the raw materials are subjected to iron removal treatment, followed by high-temperature burning and dehydration treatment, and then the high-purity raw materials are proportioned according to the designed components, and the corresponding conversion is obtained according to the weight percentage of each component. raw material weight;

[0043] (2) Ball milling and melting: Ball mill and mix the raw materials treated in step (1) evenly to make a mixture, put the mixture into a platinum crucible and heat it in a glass melting furnace at 1000-1200°C for 50-80 minutes ; Then continue to heat up to 1400-1600°C at a heating rate of 5-10°C / min and melt for 4-8 hours, stirring continuously during the melting process; when the mixture is melted, a reducing atmospher...

Embodiment 1

[0055] At first, select glass raw material according to table 1 embodiment 1 glass composition, raw material requirement, quartz sand (high purity, 150 μ m sieve is below 1%, 45 μ m sieve is below 30%, Fe 2 o 3 content less than 1PPm), boric anhydride (400μm sieve is less than 10%, 63μm sieve is less than 10%), aluminum acetate (analytical pure), lithium carbonate (analytical pure), potassium carbonate (analytical pure), barium carbonate (analytical pure), zinc oxide (analytical pure), zirconia (analytical 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 elements such as Fe 2 o 3 etc. are strictly controlled, and the finished glass Fe 2 o3 The content is less than 1PPm. Before batching, the main raw materials need to be dehydrated by high-temperature burning; then the high-purity raw materials are proportioned according to the glass chemical...

Embodiment 2

[0057] The actual composition of the glass refers to Example 2 in Table 1, using the same raw materials and raw material requirements as in Example 1, and taking the mixture into a platinum crucible and heating it in a glass melting furnace at 1200 ° C for 50 minutes; The heating rate of 1 minute continued to heat up to 1600 ° C for 4 hours of melting process and the same test conditions as in Example 1. Table 1 shows the basic properties of the sample. (1) When the wavelength is 185nm, the ultraviolet light transmittance reaches 57.3%; (2) The average linear expansion coefficient of 30-300°C is 48×10 -7 / °C.

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Abstract

The invention discloses an environment-friendly transparent deep ultraviolet borosilicate glass material, a preparation method and application thereof. The deep ultraviolet transparent glass comprises the following components by weight: 50.0-58.0% SiO 2 , 8.5‑10.0% Al 2 O 3 , 20.5‑30.0% B 2 O 3 , 0.5‑2.0%Li 2 O, 0.5‑2.5% K 2 O, 6.0‑10.0% BaO, 0.5‑1.0% ZnO, 0.5‑1.0% ZrO 2 , the transmittance at 185nm of the transparent deep ultraviolet borosilicate glass is above 50% when the thickness is 1.0mm, and the thermal expansion coefficient is (50±2)×10 in the range of 30-300℃ ‑7 / °C, has a high transition temperature, the transition temperature is greater than 600°C, and has good chemical stability.

Description

technical field [0001] The invention relates to the technical field of special glass materials and their preparation, in particular to an environment-friendly deep ultraviolet penetrating borosilicate glass and its preparation method and application. Background technique [0002] Ultraviolet radiation is a kind of electromagnetic wave ubiquitous in nature. The light with a wavelength of less than 380nm in the solar spectrum is called ultraviolet radiation (Ultraviolet Radiation), which plays an important role in ultraviolet sterilization, ultraviolet counterfeiting, ultraviolet lighting, etc. , eyes, etc. will also produce certain harm. [0003] Ultraviolet rays are divided into three types according to their wavelength range: UV-A (315-380nm), UV-B (280-315nm), and UV-C (100-280nm). The ultraviolet rays contained in sunlight pass through the atmosphere and are less than 290nm Most of the UV-C is absorbed by the ozone layer in the atmosphere. This part of the ultraviolet sp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C3/093C03C4/00C03B19/02
CPCC03C3/093C03C4/0085C03B19/02
Inventor 贾金升刘娟张磊孙勇张敬许慧超
Owner CHINA BUILDING MATERIALS ACAD
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