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Mg, Ti doped Al2O3 crystalline material and transparent laser ceramic preparation method

A technology of laser ceramics and matrix materials, applied in the direction of polycrystalline material growth, crystal growth, active medium materials, etc., can solve problems such as crystal devitrification, and achieve the effect of low manufacturing cost and simple process

Inactive Publication Date: 2006-11-22
SHANGHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Ti in Ti:Sapphire single crystal 3+ replace Al 2 o 3 Middle Al 3+ site, but in an oxidizing atmosphere, Ti 3+ Ions are easily oxidized to Ti 4+ , and devitrifies the crystal

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] In this example, the preparation of Al 2 o 3 The specific process steps of transparent laser ceramics are as follows:

[0017] 1. Using high-purity 99.99% Al 2 o 3 , 99% MgO and 99.9% TiO 2 As raw material, with Al 2 o 3 As the base material, MgO and TiO 2 as doping material; with Al 2 o 3 The weight of the base material is 100 as the measurement basis, and the doping amount of the doping material is: MgO: 0.1wt%, TiO 2 : 0.05wt%;

[0018] 2. The Al prepared according to the above formula 2 o 3 The matrix material and each dopant material are stirred and mixed, and the mixture is mixed with distilled water for 24 hours;

[0019] 3. Then dry at a temperature of 150°C, then add a polyvinyl alcohol binder with a concentration of 5wt%, and the addition amount is 5wt%, and granulate;

[0020] 4. The powder is pressed into a sheet-like sample under 200MPa cold isostatic pressing, then the polyvinyl alcohol binder is burned off at a temperature of 800°C, and then ...

Embodiment 2

[0023] The preparation process steps of this embodiment are the same as those of the above-mentioned embodiment 1. The specific steps are as follows:

[0024] 1. Using high-purity 99.99% Al 2 o 3 , 99% MgO and 99.9% TiO 2 As raw material, with Al 2 o 3 As the base material, MgO and TiO 2 as doping material; with Al 2 o 3 The weight of the base material is 100 as the measurement basis, and the doping amount of the doping material is: MgO: 0.1wt%, TiO 2 : 0.1wt%;

[0025] 2. The Al prepared according to the above formula 2 o 3 The matrix material and each dopant material are stirred and mixed, and the mixture is mixed with distilled water for 24 hours;

[0026] 3. Then dry at a temperature of 150°C, then add a polyvinyl alcohol binder with a concentration of 5wt%, and the addition amount is 5wt%, and granulate;

[0027] 4. The powder is pressed into a sheet-like sample under 200MPa cold isostatic pressing, then the polyvinyl alcohol binder is burned off at a temperat...

Embodiment 3

[0030] The preparation process steps of this embodiment are the same as those of the above-mentioned embodiment 1. The specific steps are as follows:

[0031] 1. Using high-purity 99.99% Al 2 o 3 , 99% MgO and 99.9% TiO 2 As raw material, with Al 2 o 3 As the base material, MgO and TiO 2 as doping material; with Al 2 o 3 The weight of the base material is 100 as the measurement basis, and the doping amount of the doping material is: MgO: 0.1wt%, TiO 2 : 0.4wt%;

[0032] 2. The Al prepared according to the above formula 2 o 3 , MgO and TiO 2 Stir and mix, and mix and grind the mixture with distilled water for 24 hours;

[0033] 3. Then dry at a temperature of 150°C, then add a polyvinyl alcohol binder with a concentration of 5wt%, and the addition amount is 5wt%, and granulate;

[0034] 4. The powder is pressed into a sheet-like sample under 200MPa cold isostatic pressing, then the polyvinyl alcohol binder is burned off at a temperature of 800°C, and then pre-fired a...

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Abstract

The invention relates to a Mg, Ti co-doped Al 2 o 3 The invention discloses a crystal material and a preparation method of transparent laser ceramics, which belong to the technical field of special ceramics manufacturing technology. The present invention utilizes high-purity Al 2 o 3 , MgO and TiO 2 As raw material, with Al 2 o 3 As the base material, MgO and TiO 2 It is a doping material, and its doping amount is: MgO: 0.05-0.5wt%, TiO 2 : 0.05~0.5wt%; add distilled water to the mixture for 24 hours, dry at 150°C, add 5wt% polyvinyl alcohol binder, and granulate; the powder is pressed under 200MPa cold isostatic pressure into The sheet-like sample is then pre-fired at 1300°C for 3 hours, then placed in a molybdenum wire furnace, and sintered in a reducing atmosphere at normal pressure. The sintering temperature is 1650-1800°C, and the sintering time is 1-15 hours. Finally, Dense and transparent Mg, Ti:Al 2 o 3 laser ceramics. The performance of the laser ceramic prepared by the invention is very close to that of single crystal Ti sapphire, and it can be used not only as a laser working medium for realizing higher power output, but also as a scintillation crystal in the ultraviolet band.

Description

technical field [0001] The invention relates to a Mg, Ti co-doped Al 2 o 3 The invention discloses a crystal material and a preparation method of transparent laser ceramics, which belong to the technical field of special ceramics manufacturing technology. Background technique [0002] Ti:Al 2 o 3 Single crystal titanium sapphire has the characteristics of wide gain, high saturation flux, large peak gain interface, high quantum efficiency, high thermal conductivity, and high laser damage threshold. Ti:Al 2 o 3 Single crystal is a femtosecond ultrashort pulse laser (fs, 10 -15 seconds) and high power tunable laser terawatt level (TW, 10 12 W), petawatts (thousand TW, 10 15 W) The excellent oscillation and amplification medium of the system is currently the most comprehensive and widely used tunable laser material, and it is also the most ideal femtosecond ultrafast laser crystal recognized internationally. At present, in order to obtain higher power and intensity lase...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/115C30B29/20C30B1/00H01S3/16
Inventor 杨秋红曾智江
Owner SHANGHAI UNIV
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