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Low-thermal-expansion perfluoride glass ceramic and preparation method thereof

A technology of glass ceramics and low thermal expansion, applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., can solve problems such as poor thermal stability and complicated preparation of glass ceramics, achieve controllable types and sizes, reduce thermal expansion coefficient, and operate simple effect

Active Publication Date: 2020-11-27
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the poor thermal stability of traditional ZBLAN glass and the complicated preparation of existing glass ceramics, the present invention proposes a ZBLAN glass-based, CaF 2 Calcium Fluozirconate Glass Ceramics with Low Thermal Expansion Coefficient Prepared as Negative Thermal Expansion Filling Phase and Its Preparation Method

Method used

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  • Low-thermal-expansion perfluoride glass ceramic and preparation method thereof
  • Low-thermal-expansion perfluoride glass ceramic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Preparation of raw materials: 53ZrF by molar percentage 4 -20BaF 2 -4LaF 3 -3AlF 3 -10NaF-10CaF 2 Weigh 80g of batch material, and weigh 44.4g of ammonium bifluoride according to the mass ratio of batch material to ammonium bifluoride is 1.8.

[0022] Mixing and drying of the ingredients: put the batching ingredients and ammonium bifluoride in a ball mill tank, add ethanol as a ball milling aid, the weight of the ethanol is equal to the weight of the raw materials, and mill for 30 minutes by a planetary ball mill, and mix the obtained mixed slurry with Put the ball mill pot together into a drying oven at 120°C for 6 hours to obtain the dry batch;

[0023] Melting: Put the dry batch into a platinum crucible and melt at 850°C for 30 minutes to obtain a molten liquid.

[0024] Forming and annealing: put the grooved brass mold into the annealing furnace, and raise the temperature of the annealing furnace to 250°C for standby; open the door of the annealing furnace, dir...

Embodiment 2

[0027] Preparation of raw materials: 53ZrF by molar percentage 4 -20BaF 2 -4LaF 3 -3AlF 3 -8NaF-12CaF 2 Weigh 80g of batch material, and weigh 53.33g of ammonium bifluoride according to the mass ratio of batch material to ammonium bifluoride is 1.5.

[0028] Mixing and drying of the ingredients: the batching ingredients and ammonium bifluoride are placed in a ball mill tank, and the ball milling aid ethanol is added, the weight of the ethanol is equal to the weight of the raw materials, and the resulting mixed slurry is mixed with a planetary ball mill for 45 minutes. Put the ball mill pot together into a drying oven at 120°C for 6 hours to obtain the dry batch;

[0029] Melting: Put the dry batch into a platinum crucible and melt at 850°C for 40 minutes to obtain a molten liquid.

[0030] Forming and annealing: put the grooved brass mold into the annealing furnace, and raise the temperature of the annealing furnace to 260°C for standby; open the door of the annealing fur...

Embodiment 3

[0033] Preparation of raw materials: Weigh 80g of the batch material according to the molar percentage of 53ZrF4-20BaF2-4LaF3-3AlF3-8NaF-12CaF2, and weigh 66.67g of ammonium bifluoride according to the mass ratio of the batch material to ammonium bifluoride is 1.2.

[0034] Mixing and drying of the ingredients: put the batching ingredients and ammonium bifluoride in a ball mill tank, add ethanol as a ball milling aid, the weight of the ethanol is equal to the weight of the raw materials, and mill for 30 minutes by a planetary ball mill, and mix the obtained mixed slurry with Put the ball mill pot together into a drying oven at 120°C for 6 hours to obtain the dry batch;

[0035] Melting: put the dry batch into a platinum crucible and melt at 850°C for 50 minutes to obtain a molten liquid.

[0036] Forming and annealing: put the grooved brass mold into the annealing furnace, and raise the temperature of the annealing furnace to 270°C for standby; open the door of the annealing f...

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Abstract

The invention relates to low-thermal-expansion perfluoride glass ceramic and a preparation method thereof. The material is glass ceramic formed by uniformly distributing CaZrF6 microcrystals in a ZBLAN glass matrix. The low-thermal-expansion perfluoride glass ceramic has the advantages of simplicity in preparation, easiness in crystallization control, safety and lower cost; and compared with ZBLANglass, the prepared CaZrF6 glass ceramic has the advantages that the thermal expansion coefficient is reduced by 5 times, low thermal expansion is realized, the thermal stability is improved, and therequirements of high-power light-emitting devices can be met.

Description

technical field [0001] The invention relates to ceramic glass, in particular to a low thermal expansion perfluoride glass ceramic and a preparation method thereof. Background technique [0002] With the development of science and technology, especially the rapid war in industries such as national defense, aerospace, and high-power lasers, the requirements for the comprehensive performance of materials are also increasing. In these fields, materials not only require high mechanical strength, but also require good thermal shock resistance, so that these materials can be used in environments with large temperature differences. To characterize the thermal shock resistance, the coefficient of thermal expansion is the main index. Most materials have a high coefficient of thermal expansion, thermal expansion and contraction are serious, thermal shock resistance is extremely poor, uneven temperature distribution and large temperature changes will lead to damage to the device struct...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/16C03B19/02
CPCC03C10/16C03B19/02
Inventor 姜益光黄鑫张龙袁新强王在洋张龙飞
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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