TiO2-doped infrared-transmitting aluminate glass ceramic and preparation method thereof

A glass ceramic and aluminate technology, which is applied in the field of TiO2 doped infrared transparent aluminate glass ceramic and its preparation, can solve the problems of poor chemical stability, limited preparation technology and high production cost, and achieves low raw material cost, environmental protection and safety. Good properties and improved glass hardness

Active Publication Date: 2016-02-17
CHINA BUILDING MATERIALS ACAD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, infrared glass ceramics such as sulfur-halogen glass ceramics, heavy metal fluoride (oxygen) oxide glass ceramics and germanium gallate glass ceramics and their preparation methods have been reported at home and abroad. The above materials mostly use expensive raw materials such as germanium and gallium. At the same time, it also involves heavy metals and toxic components such as F and Cl. In addition, due to the limitation of preparation technology, the production cost is high, the hardness is low, and the chemical stability is poor, so it is not suitable for use as a window material.

Method used

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  • TiO2-doped infrared-transmitting aluminate glass ceramic and preparation method thereof
  • TiO2-doped infrared-transmitting aluminate glass ceramic and preparation method thereof
  • TiO2-doped infrared-transmitting aluminate glass ceramic and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0027] Weigh and mix to make aluminate glass batch 10kg (wt%) according to the following composition ratio: 40% Al 2 o 3 , 36% CaO, 7% BaO, 4% MgO, 8% Na 2 O, 5%TiO 2 , the batch material is melted in a silicon-molybdenum rod electric furnace with a platinum-rhodium alloy crucible, the melting temperature is 1450 ° C, and the melting time is 16 hours. After melting, the molten glass is poured into a preheated cast iron mold and cooled to obtain TiO 2 Doped infrared-transmitting aluminate glass clinker.

[0028] Put the clinker crushed into 5-10mm particles into a platinum-rhodium alloy crucible and melt in a vacuum induction melting furnace with a melting temperature of 1500°C and a maximum vacuum of 1.0×10 -3 Pa. After being completely melted and clarified for 1 to 2 hours, pour the molten glass into a preheated cast iron mold, quickly transfer it to an electric furnace for annealing after molding, and obtain colorless and transparent TiO after cooling. 2 Doped infrared-...

Embodiment 2

[0031] Weigh and mix to make aluminate glass batch 10kg (wt%) according to the following composition ratio: 45% Al 2 o 3, 30% CaO, 6% BaO, 6% MgO, 10% Na 2 O, 3%TiO 2 , the batch material is melted in a silicon-molybdenum rod electric furnace with a platinum-rhodium alloy crucible, the melting temperature is 1550 ° C, and the melting time is 12 hours. After melting, the molten glass is poured into a preheated cast iron mold and cooled to obtain TiO 2 Doped infrared-transmitting aluminate glass clinker.

[0032] Put the clinker crushed into 5-10mm particles into a platinum-rhodium alloy crucible and melt in a vacuum induction melting furnace with a melting temperature of 1600°C and a maximum vacuum of 1.0×10 -3 Pa. After being completely melted and clarified for 1 to 2 hours, pour the molten glass into a preheated cast iron mold, quickly transfer it to an electric furnace for annealing after molding, and obtain TiO after cooling. 2 Doped infrared-transmitting aluminate gla...

Embodiment 3

[0035] Weigh and mix according to the following composition ratio to make aluminate glass batch 10kg (wt%): 35% Al 2 o 3 , 40% CaO, 8% BaO, 2% MgO, 6% Na 2 O, 3%K 2 O, 6%TiO 2 , the batch material is melted in a silicon-molybdenum rod electric furnace with a platinum-rhodium alloy crucible, the melting temperature is 1550 ° C, and the melting time is 8 hours. After melting, the molten glass is poured into a preheated cast iron mold and cooled to obtain TiO 2 Doped infrared-transmitting aluminate glass clinker.

[0036] Put the clinker crushed into 5-10mm particles into a platinum-rhodium alloy crucible and melt it in a vacuum induction melting furnace with a melting temperature of 1550°C and a maximum vacuum degree of 1.0×10 -2 Pa. After being completely melted and clarified for 1 to 2 hours, pour the molten glass into a preheated cast iron mold, quickly transfer it to an electric furnace for annealing after molding, and obtain TiO after cooling. 2 Doped infrared-transmi...

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Abstract

The invention relates to TiO2-doped infrared-transmitting aluminate glass ceramic and a preparation method thereof. The TiO2-doped infrared-transmitting aluminate glass ceramic is prepared from, by weight, 35%-50% of Al2O3, 30%-40% of CaO, 10%-20% of R, 7%-15% of M and 3%-6% of TiO2, wherein R is one or more of BaO, SrO and MgO, and M is Na2O and/or K2O. The preparation method includes the steps that a vacuum melting method is adopted to prepare infrared-transmitting aluminate matrix glass, and then the glass is subjected to specific heat treatment to obtain the TiO2-doped infrared-transmitting aluminate glass ceramic. The TiO2-doped infrared-transmitting aluminate glass ceramic has excellent spectrum transmittance in a visible region and a near-infrared and middle-infrared band; the TiO2-doped infrared-transmitting aluminate glass ceramic has excellent mechanical performance, and experimental results show that the hardness of the glass is significantly improved after the glass is subjected to heat treatment; the TiO2-doped infrared-transmitting aluminate glass ceramic is suitable for manufacturing spherical covers and other infrared windows in special complex shapes; the TiO2-doped infrared-transmitting aluminate glass ceramic does not contain precious metal such as rare earth, germanium and gallium, and therefore the raw material cost is low; toxic components such as fluorine, chlorine, sulphur and lead are not involved in the preparation process, and therefore environmental safety is good.

Description

technical field [0001] The invention relates to an infrared optical material, in particular to a TiO 2 Doped infrared-transmitting aluminate glass ceramics and a preparation method thereof. Background technique [0002] Infrared optical glass is a special glass material with infrared transmission properties. It not only has excellent infrared transmission properties, but also has good optical uniformity, low manufacturing cost, and is easy to process into large-sized or complex-shaped products. It has always been an infrared material. One of the key points of research application. At present, infrared glass materials that have been put into practical use include aluminates, germanium gallates, heavy metal fluorides, and chalcogenide glasses. Aluminate glass is based on Al 2 o 3 Infrared glass with CaO as the main component has excellent multi-spectral transmission performance, good transmittance from visible to mid-infrared (0.4-6 μm), and low production cost. It is idea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/02
Inventor 赵慧峰祖成奎何坤王衍行刘永华韩滨金扬利赵华陈江
Owner CHINA BUILDING MATERIALS ACAD
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