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Preparation method of rare earth doped ZnAl2O4 nanocrystalline glass

A technology of rare earth doping and znal2o4, which is applied in the field of glass, can solve the problems of glass optical transmittance reduction, reduced glass service life, glass cracks, etc.

Pending Publication Date: 2022-03-04
HAINAN UNIVERSITY
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  • Claims
  • Application Information

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Problems solved by technology

In the crystallization stage, the internal crystal increases with the heat treatment time, and the larger the crystal size, the glass strength will also increase, but the optical transmittance of the glass will decrease. If the crystal continues to grow, the size is too large and the expansion coefficient of the glass phase does not match. It will cause cracks in the glass during use and reduce the service life of the glass

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  • Preparation method of rare earth doped ZnAl2O4 nanocrystalline glass
  • Preparation method of rare earth doped ZnAl2O4 nanocrystalline glass
  • Preparation method of rare earth doped ZnAl2O4 nanocrystalline glass

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preparation example Construction

[0023] Therefore, the present application aims at the difficulty of crystal regulation in the thermodynamic treatment of glass crystals, and introduces an electric field to obtain spinel glasses with different properties; Lightness, mechanical strength. Specifically, the embodiment of the present invention discloses a rare earth doped ZnAl 2 o 4 The preparation method of nanocrystalline glass comprises the following steps:

[0024] Preparation of ZnAl 2 o 4 Base glass for nanocrystalline glass;

[0025] The base glass is subjected to thermoelectric coupling. In the thermoelectric coupling process, the glass is first heated to nucleate and then an electric field is applied in the crystallization stage.

[0026] In the present application, the preparation process of the basic glass is:

[0027] According to molar ratio 50SiO 2 -25Al 2 o 3 -9~23ZnO-2~16TiO 2 -0.001~0.095La 2 o 3 -0.034CeO 2- -0.003Pr6O11-0.002Nd 2 o 3 -0.003~0.01Eu 2 o 3 Mix the above raw material...

Embodiment 1

[0037] Divide the components into 50SiO 2 -25Al 2 o 3 -23ZnO-2TiO 2 -0.001La 2 o 3 -0.034CeO 2 -0.003Pr 6 o 11 -0.00 2Nd 2 o 3 -0.003Eu 2 o 3 The glass is melted and then annealed, then cut into 2cm*2cm*0.5cm pieces with a wire cutting machine, the upper and lower surfaces of the glass are polished, and then put into a heating furnace, according to figure 1 The DTA curve of the basic glass determines the nucleation and crystallization temperature, the nucleation temperature is selected near the glass transition temperature Tg, and the crystallization temperature is selected near the corresponding temperature Tc of the crystallization peak. From the greenhouse, the temperature is raised to 650°C at 10°C / min, the nucleation temperature is at 650°C, and the treatment time is 2h, then the temperature is raised to 800°C at 10°C / min, and an electric field is applied, the applied voltage is 500V, and the frequency is 50Hz , the application time is 2h, after the electric f...

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Abstract

The invention provides a preparation method of rare earth doped ZnAl2O4 nanocrystalline glass. The preparation method comprises the following steps: preparing base glass of the ZnAl2O4 nanocrystalline glass; the base glass is subjected to thermoelectric coupling, and in the thermoelectric coupling process, heating is conducted till glass nucleation is conducted, and then an electric field is applied in the devitrification stage. Aiming at the problem of difficulty in crystal regulation in thermodynamic treatment of glass crystals, an electric field is introduced to obtain spinel glass with different properties; on the basis of heat treatment, the size of nanoscale crystals in spinel is regulated and controlled through a thermoelectric coupling effect, and the light transmittance and the mechanical strength of the glass are regulated and controlled.

Description

technical field [0001] The invention relates to the technical field of glass, in particular to a ZnAl 2 o 4 Preparation method of nanocrystalline glass. Background technique [0002] ZnAl 2 o 4 Spinel nano glass is mainly used in the fields of optics and mechanics. Glass is widely used in daily life, and has many application prospects in construction, medical supplies and optical instruments. For example, spinel glass-ceramics has a strong absorption transition from the conduction to the valence band, which can conduct a large amount of activation energy to rare earth ions and transition elements, and improve the luminous intensity of rare earth elements and transition elements, so it can be widely used in broadband optical fibers. amplifier, tunable laser and Q laser switch. In terms of mechanical properties, spinel glass-ceramic also exhibits excellent performance. Ordinary cover protection glass density is 2.4~2.6g / cm 3 , with the shear modulus at 30GPa, the Poisso...

Claims

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Application Information

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IPC IPC(8): C03C10/02C03B32/02
CPCC03C10/00C03C10/0009C03B32/02
Inventor 李长久易兰林
Owner HAINAN UNIVERSITY