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Method for producing ceramic cavity with high reflectivity

A high reflectivity, cavity technology, used in ceramic molding machines, manufacturing tools, etc., can solve the problems of output power limitation and low laser electro-optical conversion efficiency.

Inactive Publication Date: 2006-09-13
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The existing ceramic cavity is all one-time molding, and the glaze layer material does not contain samarium oxide, and the reflectivity is only 90%, so the electro-optical conversion efficiency of the laser is not high, only 3%, and the output power is limited. The power is only about 400W

Method used

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  • Method for producing ceramic cavity with high reflectivity
  • Method for producing ceramic cavity with high reflectivity
  • Method for producing ceramic cavity with high reflectivity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] The first step is to prepare alumina powder with a powder diameter of 100nm, mix the alumina powder with ethanol or ether into mud, and spread it evenly in the designed ceramic cavity mold, and the thickness of each laying is 1mm. After each layer is laid, it is pretreated, that is, the alumina powder is heated and pressurized, the pressure range is 1000kg, the temperature range is 700°C, and the duration is 9 hours. The total thickness of the laying is 14mm to complete the formation of the alumina cavity.

[0029] In the second step, the formed alumina cavity is sintered, the sintering temperature range is 1500°C, and the holding time is 8 hours. The sintering atmosphere is maintained in the sintering furnace, and the gas in the sintering furnace is a mixed gas, wherein the volume percentage ranges of oxygen and nitrogen are 30% and 70% respectively.

[0030] In the third step, the surface of the alumina ceramic cavity is processed on a grinding machine, and the surfac...

Embodiment 2

[0035] The first step is to prepare alumina powder with a powder diameter of 90nm, mix the alumina powder with ethanol or ether into mud, and spread it evenly in the designed ceramic cavity mold, and the thickness of each laying is 0.8mm , each layer is pretreated, that is, the alumina powder is heated and pressurized, the pressure range is 600kg, the temperature range is 500°C, the duration is 6 hours, and the total thickness of the laying is 12mm to complete the formation of the alumina cavity.

[0036] In the second step, the formed alumina cavity is sintered, the sintering temperature range is 1200°C, and the holding time is 6 hours. The sintering atmosphere is maintained in the sintering furnace, and the gas in the sintering furnace is a mixed gas, wherein the volume percentage ranges of oxygen and nitrogen are 35% and 65% respectively.

[0037] In the third step, the surface of the alumina ceramic cavity is processed on a grinding machine, and the surface roughness is le...

Embodiment 3

[0042]The first step is to prepare alumina powder with a powder diameter of 110nm, mix the alumina powder with ethanol or ether into mud, and spread it evenly in the designed ceramic cavity mold, and the thickness of each laying is 1.2mm , each layer is pretreated, that is, the alumina powder is heated and pressurized, the pressure range is 1200kg, the temperature range is 800°C, the duration is 10 hours, and the total thickness of the laying is 15.6mm to complete the formation of the alumina cavity .

[0043] In the second step, the formed alumina cavity is sintered, the sintering temperature range is 1700°C, and the holding time is 10 hours. The sintering atmosphere is maintained in the sintering furnace, and the gas in the sintering furnace is a mixed gas, wherein the volume percentage ranges of oxygen and nitrogen are 40% and 60% respectively.

[0044] In the third step, the surface of the alumina ceramic cavity is processed on a grinding machine, and the surface roughnes...

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Abstract

A process for preparing the ceramic cavity with high reflectivity, light conversion efficiency, compactness and pumping uniformity is prepared through preparing alumina powder, mix it with ethanol or ether, spreading in mould by 0.8-1.2 mm in thickness and heating while pressurizing, repeating previous step until its thickness is 12-16 mm, sintering, roughening its surface, annealing, coating the enamel prepared from barium sulfate and samarium oxide, and sintering.

Description

Technical field: [0001] A method for preparing a high-reflectivity ceramic cavity belongs to the technical field of high-power solid-state lasers. Background technique [0002] As an effective processing method, laser processing has been widely used in industries such as machinery, electronics, automobiles, aerospace, steel, shipbuilding, and military industry. High-power solid-state lasers have the advantages of high energy storage, short wavelength, high metal absorption rate, and easy optical fiber transmission, and have a very wide range of applications. [0003] In high-power solid-state lasers, the ceramic cavity is a diffuse reflection concentrating cavity, which is used to effectively transmit the light energy radiated by the pump light source to the working substance, that is, the Nd:YAG rod, so as to excite the laser working substance to generate laser light. The ceramic cavity is a diffuse reflection cavity. Compared with the mirror reflection cavity, it is easy ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/622C04B41/86B28B1/29B28B11/08
Inventor 李强姜梦华丁小艇
Owner BEIJING UNIV OF TECH
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