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Nano-multicrystal phase glass ceramics and its production method

A technology of glass ceramics and polycrystalline phases, which is applied in the field of glass ceramics and its production, and can solve problems such as changes in the structure and performance of glass ceramics

Inactive Publication Date: 2007-07-11
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In addition, in the past, when glass ceramics were heat treated at low temperature, glass ceramics whose main crystal phase was β-quartz solid solution were obtained. After heat treatment, the main crystal phase changed to glass ceramics of β-spodumene, so there was β-quartz solid solution The process of transforming bulk to β-spodumene, which may lead to changes in the structure and properties of glass ceramics

Method used

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Embodiment Construction

[0034] Specific embodiments of the present invention will be described in detail with reference to the above-mentioned drawings.

[0035] Table 2~table 4 has provided the composition of embodiment 1~embodiment 9 glass ceramics of the present invention and their melting temperature, nucleation temperature, crystallization temperature, main crystal phase, secondary crystal phase, grain average size , thermal expansion coefficient, bending strength, elastic modulus, light transmittance. These glass ceramics are characterized by containing at least P 2 o 5 or LiF, or both containing P 2 o 5 and LiF.

[0036] Table 2

[0037] Example 1

Example 2

Example 3

SiO 2

Li 2 o

Al 2 o 3

70

4

15

70

3.7

15

70

3.3

15

[0038] MgO

ZnO

CaO

B 2 o 3

TiO 2

ZrO 2

K 2 O+Na 2 o

LiF

P 2 o 5

As 2 o 3 ...

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Abstract

The present invention discloses a nano multicrystal phase glass-ceramic. Its composition includes (by wt%) 70% of silicon dioxide, 3.1%-4% of lithium oxide, 15% of aluminium oxide, 0.7%-1.2% of magnesium oxide, 0.8%-1.4% of zinc oxide, 0.4%-0.7% of calcium oxide, 0.2% of boron oxide, 1.8%-3.2% of titanium oxide, 1.5%-2.3% of zirconium oxide, 1.8%-2.1% of mixture of potassium oxide and sodium oxide, 0.1%-2.0% of lithium fluoride and / or phosphorus pentoxide and 0.8%-0.9% of mixture of arsenium oxide and antimony oxide. Its production method includes the following steps: grinding the above-mentioned components, uniformly mixing them to obtain mixed material, melting at 1350-1650deg.C, forming, annealing, nucleating for 1-4hr at 500-800deg.C, then heating to 700-1000deg.C and making crystallization treatment for 1-12hr so as to obtain the invented product.

Description

technical field [0001] The invention relates to a glass ceramic and a production method thereof, in particular, a glass ceramic with a polycrystalline phase composition and a crystal grain size in the nanoscale range and a production method thereof. Background technique [0002] Glass ceramics are polycrystalline solid materials produced by controlled crystallization of glass. In this specification, the term "nanocrystal" means that after nucleation and crystallization, the crystal grain size of glass ceramics and products is in the nanoscale range of 1-100 nm. Spherical crystals refer to the size of their diameter, and axial crystals refer to the size of their axial diameter. As stated by Macmillan, a striking characteristic of glass-ceramics is its extremely fine grain size, and it is likely that this characteristic largely determines the valuable properties of the material, how the method of production of the glass-ceramic and its properties It is very valuable to corre...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03C10/00C03C10/14C03B32/02
Inventor 陈明形郭兴忠潘颐曹明韩陈宋芳芳
Owner ZHEJIANG UNIV
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