Preparation method of glass ceramic

A technology of glass ceramics and glass powder, which is applied in the field of glass ceramics preparation to achieve excellent optical properties and high insulation reliability

Inactive Publication Date: 2015-02-18
华文蔚
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] At present, the research on the luminescent properties of borosilicate glass by single rare earth ions is more common, however, there are few literature reports that can use the combination of multiple rare earth ions to study its influence on the luminesc

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0030] Example 1

[0031] (1) Prepare the first glass containing the following ingredients (mass%, calculated as oxide):

[0032] 30% by mass magnesium borosilicate glass powder, 30% alumina filler powder, 30% by mass Y 2 O 3 And 10% by mass of rare earth ion Ce / Eu, the magnesium borosilicate glass powder contains 68% by mass of SiO in terms of oxide 2 , 10% by mass B 2 O 3 , 10% by mass Al 2 O 3 , 22% by mass MgO. Among them, the mole fraction of Ce and Eu are both 0.5%.

[0033] (2) The first heat treatment time at 650°C was 20h, and the second heat treatment time at 700°C was 68h.

[0034] After testing, the crystallization rate of the glass phase in the ceramic sintered body obtained by firing reached 55% by volume, and the high refractive index filler powder was a ceramic with a refractive index exceeding 1.95.

Example Embodiment

[0035] Example 2

[0036] (1) Prepare the first glass containing the following ingredients (mass%, calculated as oxide):

[0037] 32 mass% magnesium borosilicate glass powder, 35% alumina filler powder, 20 mass% Y 2 O 3 And 13% by mass of rare earth ion Ce / Eu, the magnesium borosilicate glass powder contains 68% by mass of SiO in terms of oxide 2 , 10% by mass B 2 O 3 , 10% by mass Al 2 O 3 , 22% by mass MgO. Wherein, the mole fraction of Ce and Eu are both 1.0%.

[0038] (2) The first heat treatment time at 660°C was 22h, and the second heat treatment time at 750°C was 60h.

[0039] After testing, the crystallization ratio of the glass phase in the ceramic sintered body obtained by firing reached 52% by volume, and the high refractive index filler powder was a ceramic with a refractive index exceeding 1.95.

Example Embodiment

[0040] Example 3

[0041] (1) Prepare the first glass containing the following ingredients (mass%, calculated as oxide):

[0042] 34% by mass magnesium borosilicate glass powder, 38% alumina filler powder, 16% by mass Y 2 O 3 And 12% by mass of rare earth ions Ho / Tm / Yb, the magnesium borosilicate glass powder contains 60% by mass SiO in terms of oxide 2 , 10% by mass B 2 O 3 , 10% by mass Al 2 O 3 , 20% by mass MgO. Among them, the mole fractions of Ho, Tm and Yb are all 1.0%.

[0043] (2) The first heat treatment at 680°C takes 25h, and the second heat treatment at 750°C takes 70h.

[0044] After testing, the crystallization rate of the glass phase in the ceramic sintered body obtained by firing reached 53% by volume, and the high refractive index filler powder was a ceramic with a refractive index exceeding 1.97.

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Abstract

The invention relates to a preparation method of glass ceramic. The method comprises the following steps: (1) preparing the following raw materials by mass percent: 30%-40% of magnesia borosilicate glass powder, 30%-50% of aluminum oxide filler powder, 10%-30% of Y2O3 and 10%-15% of rare earth ions, wherein the magnesia borosilicate glass powder contains 40%-70% of SiO2, 8%-25% of B2O3, 5%-30% of Al2O3 and 20%-30% of MgO; (2) performing heat treatment for the first time at 650-750 DEG C and performing heat treatment for the second time at 700-750 DEG C. A glass ceramic substrate prepared by the method is high in reflection rate, low in glass phase crystallization rate and excellent in luminous performance.

Description

technical field [0001] The invention relates to a method for preparing glass ceramics, in particular to a method for preparing glass ceramics applicable to optical glass. Background technique [0002] With the rapid development of information technology and optoelectronic technology, people pay more and more attention to the special properties of phosphors, which exist in the form of crystalline powder, single crystal, film, ceramics, glass, etc. Because glass has the advantages of being uniform, transparent, easy to process into various shapes, and can be doped at a higher concentration, it has gradually become a good matrix material for inorganic luminescence, and its use is becoming more and more extensive. [0003] Light sources are generally divided into discharge lamps and solid-state lamps, where heat radiators dominate in general lighting and automotive applications, such as halogen lamps. Additionally, solid state light sources in the form of luminescent radiators,...

Claims

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Application Information

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IPC IPC(8): C03C10/00
CPCC03C10/0045
Inventor 华文蔚
Owner 华文蔚
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