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A kind of preparation method of nanocrystalline glass ceramics

A glass ceramic and nanocrystalline technology, which is applied in the field of preparing nanocrystalline glass ceramics by microwave heat treatment, can solve the problems of long crystallization time, high raw material cost, low energy consumption, etc., and achieves fast heating and sintering speed, fast heating speed, high density effect

Inactive Publication Date: 2016-05-04
INNER MONGOLIA UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved in the present invention: to overcome the disadvantages of high raw material cost, nucleation, and long crystallization time in the prior art, and provide a method for preparing nanocrystalline glass ceramics by microwave heat treatment, which can easily obtain a crystal grain size of Nanocrystalline glass ceramics with nanoscale and uniform structure, easy to control the crystal nucleus formation and growth process, low energy consumption, energy saving and environmental protection

Method used

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  • A kind of preparation method of nanocrystalline glass ceramics
  • A kind of preparation method of nanocrystalline glass ceramics
  • A kind of preparation method of nanocrystalline glass ceramics

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Embodiment 1

[0034] Embodiment one: A kind of method for preparing nanocrystalline glass ceramics

[0035] 1) Taking the basic glass composition in Table 1 as an example, make a glass product, then send the glass product into a microwave oven to heat up, and keep it at 560°C for 20 minutes;

[0036] 2) Continue heating the glass product to 630°C, keep it warm for 25 minutes, and carry out microwave heat treatment in the process of crystal nucleus formation;

[0037] 3) On the basis of the microwave heat treatment of the crystal nucleus formation process, the microwave heat treatment of the crystal nucleus growth is carried out on the glass products;

[0038] Gradually heat the glass product, the specific heating method is as follows:

[0039] (1) Continue to heat up to 640°C, and keep warm at this temperature for 5 minutes;

[0040] (2) Heat up to 660°C and keep warm for 5 minutes;

[0041] (3) Heat up to 680°C and keep warm for 5 minutes;

[0042] (4) Heat up to 710°C and keep warm ...

Embodiment 2

[0048] Embodiment two: A kind of method for preparing nanocrystalline glass ceramics

[0049] 1) Taking the basic glass composition in Table 1 as an example, make a glass product, then heat it in a microwave oven, and keep it at 570°C for 20 minutes;

[0050] 2) Raise the temperature to 620°C, keep it warm for 30 minutes, and perform microwave heat treatment in the process of crystal nucleus formation;

[0051] 3) On the basis of the microwave heat treatment of the crystal nucleus formation process, the microwave heat treatment of the crystal nucleus growth is performed on the glass products;

[0052] Gradually heat the glass product, the specific heating method is as follows:

[0053] (1) Heat up to 645°C and keep warm for 4 minutes;

[0054] (2) Heat up to 652°C and keep warm for 4 minutes;

[0055] (3) Heat up to 672°C and keep warm for 4 minutes;

[0056] (4) Heat up to 702°C and keep warm for 4 minutes;

[0057](5) Heat up to 742°C and keep warm for 4 minutes;

[...

Embodiment 3

[0060] Embodiment three: A kind of method for preparing nanocrystalline glass ceramics

[0061] 1) Taking the basic glass composition in Table 1 as an example, make a glass product, then heat it in a microwave oven, and keep it at 580°C for 20 minutes;

[0062] 2) Continue to heat up to 610°C, keep it warm for 35 minutes, and carry out microwave heat treatment in the process of crystal nucleus formation;

[0063] 3) On the basis of the microwave heat treatment of the crystal nucleus formation process, the glass product is subjected to the microwave heat treatment of the crystal nucleus growth.

[0064] Gradually heat the glass product, the specific heating method is as follows:

[0065] (1) Heat up to 645°C and keep warm for 6 minutes;

[0066] (2) Heat up to 655°C and keep warm for 6 minutes;

[0067] (3) Heat up to 675°C and keep warm for 6 minutes;

[0068] (4) Heat up to 715°C and keep warm for 6 minutes;

[0069] (5) Heat up to 745°C and keep warm for 6 minutes;

...

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Abstract

The invention relates to a method for preparing nanocrystalline glass ceramics, which comprises the steps of sending shaped glass products into a microwave oven, performing crystal nucleus formation and crystal nucleus growth through microwave heat treatment, and finally cooling to room temperature. Wherein, the heat treatment temperature in the crystal nucleus formation process is 610-630°C; the heat treatment temperature in the crystal nucleus body growth process is 640-780°C. The invention uses microwaves to accurately control the formation of crystal nuclei and the growth of crystal nuclei, and can easily obtain nanocrystalline glass ceramics with a crystal grain size of nanometer level and uniform structure. Microwave heating can make the material itself heat up at the same time, the heating speed is fast, there is no thermal inertia, and the temperature and time in the process of crystal nucleus formation and crystal nucleus production can be precisely controlled; the process of the invention is simple, can effectively reduce costs, and the process is pollution-free and energy-saving Environmental protection; the main technical indicators of the obtained nanocrystalline glass ceramic products are relatively good.

Description

Technical field [0001] The present invention involves a preparation method of nano -crystal glass ceramics, especially the method of using microwave heat treatment to prepare nano -crystal glass ceramics. Background technique [0002] With the development of high -tech, traditional materials can no longer meet the requirements due to the limitations that it is difficult to overcome.Because of its unique excellent performance, nanomaterials have been a hot spot in the material industry research in recent years.Glass ceramics has good mechanical properties and can obtain extremely smooth surfaces, suitable for bearing as the bearing; using its high strength and good abrasion resistance, it can replace steel manufacturing oblique grooves, ball mill lining, and grinding body; in addition, special specialty can be manufacturedCutting tools, piston heads, clutch, rotating blades, etc.Because the expansion coefficient of glass ceramics can be changed in a large scale, it can be welded w...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/04
Inventor 张雪峰李保卫贾晓林
Owner INNER MONGOLIA UNIV OF SCI & TECH
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