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Transparent Sr3Al2O6-SrAl2O4 glass ceramic and preparation method thereof

A glass-ceramic, transparent technology, applied in the field of optical functional materials, can solve the problem of few reports in the field of ceramic materials

Inactive Publication Date: 2018-01-09
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The "containerless" method is widely used in the study of the solidification mechanism and solidification kinetics of metals and metal alloys, but there are few reports in the field of ceramic materials

Method used

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  • Transparent Sr3Al2O6-SrAl2O4 glass ceramic and preparation method thereof
  • Transparent Sr3Al2O6-SrAl2O4 glass ceramic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Raw material SrCO 3 with Al 2 o 3 The stoichiometric ratio of [x:(100-x), x=66.7] is used for weighing, mixing evenly and compacting. The compacted sample is calcined at 1400°C for 6 hours in a muffle furnace; the sintered block is then broken into diameters 3-5 mm blocks.

[0028] with CO 2 The pneumatic levitation device of the laser performs vitrification, puts the broken block into the inverted conical cavity, blows oxygen at the bottom, and the laser power reaches the full load power (150W), the block sample is completely molten, and the spherical sample rotates stably. The laser was turned off, and the sample was cooled at a cooling rate of 1000 °C / min to obtain a spherical glass sample.

[0029] The spherical glass sample was crushed into powder and placed in a graphite mold (inner diameter 20mm), and carbon paper was used to block between the mold and the powder. A spark plasma sintering furnace is used for sintering. The sintering parameters are: axial pre...

Embodiment 2

[0033] Raw material SrCO 3 with Al 2 o 3 The stoichiometric ratio of [x:(100-x), x=62] is used for weighing, mixing evenly and compacting. The compacted sample is calcined at 1200°C for 8 hours in a muffle furnace; the sintered block is then broken into diameters 3-5 mm blocks.

[0034] with CO 2 The pneumatic levitation device of the laser performs vitrification, puts the broken block into the inverted conical cavity, blows oxygen at the bottom, and the laser power reaches the full load power (150W), the block sample is completely molten, and the spherical sample rotates stably. The laser was turned off, and the sample was cooled at a cooling rate of 1000 °C / min to obtain a spherical glass sample.

[0035] The spherical glass sample was crushed into powder and placed in a graphite mold (inner diameter 20mm), and carbon paper was used to block between the mold and the powder. A spark plasma sintering furnace is used for sintering. The sintering parameters are: axial press...

Embodiment 3

[0037] Raw material SrCO 3 with Al 2 o 3 The stoichiometric ratio of [x:(100-x), x=65] is used for weighing, mixing evenly and compacting. The compacted sample is calcined at 1400°C for 4 hours in a muffle furnace; the sintered block is then broken into diameters 3-5 mm blocks.

[0038] with CO 2 The pneumatic levitation device of the laser performs vitrification, puts the broken block into the inverted conical cavity, blows oxygen at the bottom, increases the laser power to 100W, and the block sample is completely in a molten state. After the spherical sample rotates stably, turn it down. Laser power, rapid cooling, to obtain spherical glass samples.

[0039] The spherical glass sample was crushed into powder and placed in a graphite mold (inner diameter 20mm), and carbon paper was used to block between the mold and the powder. A spark plasma sintering furnace is used for sintering, the sintering parameters are: axial pressure 45MPa, end point temperature 880°C, heating ...

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Abstract

The invention discloses transparent Sr3Al2O6-SrAl2O4 glass ceramic and a preparation method thereof. The glass ceramic comprises Sr3Al2O6 and SrAl2O4. The method comprises the following steps: takingSrCO3-Al2O3 as a reaction system, obtaining a material component with high glass formation ability via exploration, and obtaining a glass precursor which is spherical transparent glass of an SrO-Al2O3system via laser heating and aerodynamic levitation; obtaining the transparent Sr3Al2O6-SrAl2O4 glass ceramic via pressure sintering and controlled crystallization, which adopts transparent glass ceramic comprising Sr3Al2O6 and SrAl2O4. The method breaks through the limitation of the traditional technology, ensures that bulk transparent glass ceramic is rapidly and effectively obtained, and provides advantageous selection for the subsequent glass crystallization or other applications.

Description

technical field [0001] The invention relates to the technical field of optical functional materials, in particular to a transparent Sr 3 al 2 o 6 -SrAl 2 o 4 Glass ceramics and methods for their preparation. Background technique [0002] In the case of rapid changes and new challenges in the research and engineering application of optical materials, transparent glass ceramics have become a kind of optical materials with great potential. Compared with other optical materials, transparent glass ceramics are relatively low cost, easy to shape, and easy to dope. It is usually obtained by controlled crystallization of glass. However, the types of transparent glass ceramics that have been discovered are still limited, which is caused by the low cooling rate of the traditional glass melting cooling process. It is expected to obtain more glass-ceramic material systems with important application value by increasing the cooling rate of glass melt. SrO-Al 2 o 3 The system is ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/02C03B32/02
Inventor 李江涛刘家希贺刚鲁楠
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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