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Optic transparent ceramic microsphere and preparation method thereof

A ceramic microsphere and optically transparent technology, applied in the field of optically transparent ceramic microspheres and their preparation, can solve the problems of large pores on the surface of the embryo body, uneven stress distribution, uneven density of the green body, etc., and achieve controllable light transmittance. , The effect of uniform shrinkage and uniform density

Inactive Publication Date: 2013-05-01
NORTHEASTERN UNIV LIAONING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] The development of technology in the field of ceramic material preparation depends on the preparation and development of ceramic powder. The current preparation methods of ceramic powder include: solid phase method, liquid phase method, sol-gel method, spray pyrolysis method and microemulsion method, etc. In the final analysis, the principle of powder preparation is the secondary particles formed due to the different ways and degrees of agglomeration. The agglomerated secondary particles are fragile and easy to deform during the molding process, because the contact area between the particles increases and the friction force increase, resulting in uneven stress distribution, resulting in uneven density of the green body formed by the powder, and all uneven density will be amplified during the sintering process of the green body, resulting in the formation of large pores or even cracks on the surface of the green body; secondly, There are a large number of pores and defects inside the secondary particles, and the density is very low. In the molding process, the density of the green body will be reduced.
Therefore, how to avoid the problems of brittleness, easy deformation and low density of ceramic powder in the process of molding is a major problem in the field of ceramic powder preparation.

Method used

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  • Optic transparent ceramic microsphere and preparation method thereof
  • Optic transparent ceramic microsphere and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Dry press the raw alumina ceramic powder at 200Mpa, then grind it in a mortar, separate it with a grading sieve, select the alumina ceramic powder of 1-500μm, spread it on the copper plate, and vibrate the copper plate manually , so that the alumina ceramic powder is tiled in a single layer on the copper plate, place the copper plate on the working platform of the laser cutting machine, scan the alumina ceramic powder within the entire range of the copper plate with the laser, and set the scanning speed to 50mm / s , the number of scans is 3 times, and after the scan is completed, collect the alumina ceramic powder on the copper plate, that is, the optically transparent alumina ceramic microspheres.

[0025] The diameter of the optically transparent alumina ceramic microspheres prepared by the method of the invention is between 1-500 μm, and the light transmittance in the visible light region is 95%.

[0026] The resulting optically transparent alumina ceramic microsphere...

Embodiment 2

[0028] The raw material yttrium oxide ceramic powder and Nd 2 o 3 Powder mix, Nd 2 o 3 The doping amount of the powder accounts for the raw material yttrium oxide ceramic powder and Nd 2 o 3 0.01% of the total molar weight of the powder, the raw material yttrium oxide ceramic powder and Nd 2 o 3 The mixed powder of the powder is dry-pressed at 200Mpa, then ground in a mortar, separated with a grading sieve, and the mixed powder of 1-500μm is selected, spread on the copper plate, and the copper plate is manually shaken to make the mixed powder The body is laid on the copper plate in a single layer, and the copper plate is placed on the working platform of the laser cutting machine, and the mixed powder within the entire range of the copper plate is scanned by the laser, and the scanning speed is 100mm / s. After scanning for 2 times, the copper plate is collected The powder on the surface is optically transparent yttrium oxide ceramic microspheres.

[0029] The optically t...

Embodiment 3

[0031] The raw material YAG ceramic powder and Yb 2 o 3 and Ho 2 o 3 Powder mixing, Yb 2 o 3 and Ho 2 o 3 The doping amount of the powder accounts for the raw material YAG ceramic powder and Yb 2 o 3 and Ho 2 o 3 5% of the total molar weight of the powder, Yb 2 o 3 and Ho 2 o 3 The powder is mixed according to the molar ratio of 1:1, and the raw material YAG ceramic powder and Yb 2 o 3 and Ho 2 o 3 The mixed powder of the powder is dry-pressed at 200Mpa, then ground in a mortar, separated with a grading sieve, and the mixed powder of 1-500μm is selected, spread on the copper plate, and the copper plate is manually shaken to make the mixed powder The body is laid on the copper plate in a single layer, and the copper plate is placed on the working platform of the laser cutting machine, and the mixed powder within the entire range of the copper plate is scanned by the laser, and scanned twice at a scanning speed of 150mm / s. After the scanning is completed, the co...

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Abstract

The invention belongs to the technical field of ceramic material preparation, and in particular relates to an optic transparent ceramic microsphere and a preparation method thereof. The preparation method comprises the following steps: carrying out dry pressing on a mixed powder formed by raw materials namely ceramic powder and rare earth oxide powder, or only a raw material ceramic powder; then grinding and separating to select powder with the particle size of 1-500mu m and then flatly spreading the powder on a copper plate; placing the copper plate in a work platform of a laser cutting machine, scanning the powder on the whole copper plate with laser at the speed of 50-200mm / s for 1-3 times; and after scanning, collecting the powder on the copper plate, namely the optic transparent ceramic microsphere. The ceramic microsphere prepared by using the method is high in density, small in friction and uniform in stress distribution, is optically transparent and is not easy to deform in the pressing process, and is not be aggregated.

Description

technical field [0001] The invention belongs to the technical field of ceramic material preparation, and in particular relates to an optically transparent ceramic microsphere and a preparation method thereof. technical background [0002] The development of technology in the field of ceramic material preparation depends on the preparation and development of ceramic powder. The current preparation methods of ceramic powder include: solid phase method, liquid phase method, sol-gel method, spray pyrolysis method and microemulsion method, etc. In the final analysis, the principle of powder preparation is the secondary particles formed due to the different ways and degrees of agglomeration. The agglomerated secondary particles are fragile and easy to deform during the molding process, because the contact area between the particles increases and the friction force increase, resulting in uneven stress distribution, resulting in uneven density of the green body formed by the powder,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/626C04B35/653C04B35/10C04B35/505C04B35/44
Inventor 孙旭东惠宇李晓东李继光霍地刘绍红
Owner NORTHEASTERN UNIV LIAONING