Magnesium aluminum silicon system glass and preparation method of high-crystallinity-degree transparent glass-ceramic

A technology of glass-ceramics and high crystallinity, which is applied in the field of glass materials, can solve the problems of glass-ceramic property degradation, unmentioned crystallinity and transmittance of glass-ceramics, and achieve low equipment requirements, preparation methods and production The process is simple and easy to operate, and the effect of comprehensive performance is good

Pending Publication Date: 2019-01-25
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In this method, the corresponding grains are used as raw materials for mixing, sintering and other treatments to obtain glass-ceramics. The main crystal phase in glass-ceramics is diopside, and there are other secondary crystal phases. Therefore, some properties of glass-ceramics will vary. dropped
And none of the above patent applications mentioned the crystallinity and transmittance of glass-ceramic

Method used

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  • Magnesium aluminum silicon system glass and preparation method of high-crystallinity-degree transparent glass-ceramic
  • Magnesium aluminum silicon system glass and preparation method of high-crystallinity-degree transparent glass-ceramic
  • Magnesium aluminum silicon system glass and preparation method of high-crystallinity-degree transparent glass-ceramic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Raw material ratio (mass) is: MgO: 16.45g, Al 2 o 3 : 41.20g, SiO 2 : 67.98g, ZrO 2 : 2.49g, TiO 2 : 1.61g, (NH 4 ) 2 HPO 4 : 5.34g, H 3 BO 3 : 2.52g and clarifying agent Sb 2 o 3 : 1.36g.

[0024] Put the raw materials into an agate mortar and grind them, mix them evenly, and get the batch materials; put the batch materials into a corundum crucible, put them into a melting furnace, first raise the furnace temperature to 1600°C, the heating rate is 5°C / min, and keep it warm for 20 minutes , and then lowered to 1560°C, the cooling rate was 10°C / min, and kept for 10 minutes, and then raised to 1600°C, the heating rate was 8°C / min, and kept for 20 minutes; finally, it was moved to a preheated mold at 600°C, and annealed for 2 hours , and cooled to room temperature to obtain the base glass. Move the basic glass into a muffle furnace for heat treatment, the heating rate is 3°C / min, first raise the furnace temperature to 780°C for nucleation, and keep it for 24 ho...

Embodiment 2

[0027] Raw material ratio (mass) is: MgO: 16.45g, Al 2 o 3 : 41.20g, SiO 2 : 65.55g, ZrO 2 : 7.47g, TiO 2 : 3.22g, H 3 BO 3 : 2.52g and clarifying agent Sb 2 o 3 : 1.35g.

[0028] Put the raw materials into an agate mortar and grind them, mix them evenly, and get the batch materials; put the batch materials into a corundum crucible, put them into a melting furnace, first raise the temperature of the furnace to 1610°C, the heating rate is 5°C / min, and keep it warm for 40 minutes , and then lowered to 1570°C, the cooling rate was 15°C / min, and kept for 10 minutes, then raised to 1610°C, the heating rate was 7°C / min, and kept for 40 minutes; finally, it was moved to a preheated mold at 620°C, and annealed for 4 hours , and cooled to room temperature to obtain the base glass. Move the basic glass into a muffle furnace for heat treatment at a heating rate of 5°C / min. First raise the furnace temperature to 800°C for nucleation and keep it for 36 hours, then raise the furnac...

Embodiment 3

[0031] Raw material ratio (mass) is: MgO: 16.45g, Al 2 o 3 : 37.08g, SiO 2 : 67.98g, ZrO 2 : 7.46g, (NH 4 ) 2 HPO 4 : 5.34g, H 3 BO 3 : 5.05g and clarifying agent Sb 2 o 3 : 1.36g.

[0032] Put the raw materials into an agate mortar and grind them, mix them evenly, and get the batch materials; put the batch materials into a corundum crucible, put them into a melting furnace, first raise the furnace temperature to 1620°C, the heating rate is 5°C / min, and keep it warm for 40 minutes , and then lowered to 1560°C with a cooling rate of 20°C / min, holding for 15 minutes, then rising to 1620°C with a heating rate of 10°C / min, holding for 40 minutes, and then falling to 1550°C with a cooling rate of 10°C / min , keep it warm for 15 minutes, then raise it to 1650°C at a heating rate of 9°C / min, keep it warm for 20 minutes; then move it to a preheated mold at 640°C, anneal for 6 hours, and cool to room temperature to get the basic glass. Move the basic glass into a muffle furna...

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Abstract

The invention discloses magnesium aluminum silicon system glass and a preparation method of high-crystallinity-degree transparent glass-ceramic. The glass-ceramic is prepared from component raw materials including MgO, Al2O3, SiO2, a sintering assistant, a clarifier and a nucleating agent through a fused cooling-controllable devitrification method, and a fusing process for high-temperature convectional mixing homogenization through temperature perturbation induction is adopted to fuse mixed batch. The raw materials are easy to obtain, the prepared glass-ceramic has the advantages of high crystallinity, high light transmittance, higher strength, excellent chemical stability and the like. It is specifically embodied in that with the transmittance of 2mm glass-ceramic with the crystallinity of 75-95 vol.% in a visible region is 60-90%, the volume density is 2.450-2.550 g/cm<3>, the microhardness 7.0-9.5 GPa, the thermal expansion coefficient TEC (25-600 DEG C) is 14.00-26.00 * 10-/7 DEG C, and the glass-ceramic is used as a solid optical functional material.

Description

technical field [0001] The invention relates to a method for preparing glass with magnesium oxide, aluminum oxide and silicon dioxide as main raw materials and transparent glass-ceramics with high crystallinity, belonging to the technical field of glass materials. technical background [0002] Solid-state optical functional materials play an extremely important and irreplaceable role in several major projects and major projects such as solid-state lasers, laser navigation gyroscopes, and infrared generators. the key material. Solid optical functional materials can be divided into organic solid optical functional materials and inorganic solid optical functional materials, the latter mainly including transparent crystals, transparent ceramics, and glass. Transparent crystals have high transmittance in the visible light region and excellent luminescent performance, but there are problems such as anisotropy, poor mechanical properties, easy cracking, difficulty in making large-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C10/08
CPCC03C10/0045
Inventor 卢安贤韩磊罗志伟刘涛涌林昌伟桂花吴佳琦
Owner CENT SOUTH UNIV
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