Method for preparing cerium doped yttrium aluminum garnet

A technology doped with yttrium aluminum garnet and cerium, which is applied in chemical instruments and methods, alumina/aluminum hydroxide, luminescent materials, etc., can solve the problems of increased production and synthesis costs, harsh synthesis conditions, and complicated preparation processes, and achieves Small impurity phase, low synthesis temperature, and good particle uniformity

Inactive Publication Date: 2009-06-17
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above are all methods for wet chemical preparation of YAG, but all have their own shortcomings, such as the precipitation method needs to accurately control the pH value of the precipitation because of the different sensitivity of different cations to the pH value; the sol-gel method has

Method used

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  • Method for preparing cerium doped yttrium aluminum garnet
  • Method for preparing cerium doped yttrium aluminum garnet
  • Method for preparing cerium doped yttrium aluminum garnet

Examples

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Effect test

example 1

[0027] Mix 2.4557g of yttrium oxide and 10mL of concentrated nitric acid in a closed reaction kettle, heat to 120°C under magnetic stirring, and keep the temperature for 10 minutes. Dissolve 15.4574g of aluminum nitrate and 0.3257g of cerium nitrate in 30mL of deionized water, add 3.6g of urea as a combustion agent, and add 0.8g of polyethylene glycol as an organic dispersant.

[0028] After mixing the two solutions, place them in a high-temperature sintering furnace with an air atmosphere at 800°C for 10 minutes. After a vigorous reaction, grind the resulting yellow powder and place it at 1100°C (the heating rate is 300°C per hour) with hydrogen and The sintering was carried out for 5 hours in a reducing atmosphere mixed with nitrogen 4:96. Cool the obtained sample to room temperature, wash with acid and alcohol, and sieve through a 400-mesh sieve to obtain YAG: Ce 3+ Powder.

example 2

[0030] Mix 2.4952g of yttrium oxide with 10mL of concentrated nitric acid with a mass fraction of 67% in a closed reaction kettle, heat to 140°C under magnetic stirring, and keep the temperature for 5 minutes. Dissolve 14.0674g of aluminum nitrate and 0.2605g of cerium nitrate in 30mL of deionized water, add 1.8g of urea as a combustion agent, and add 0.5g of polyethylene glycol as an organic dispersant.

[0031] After mixing the two solutions, place them in a high-temperature sintering furnace with an air atmosphere at 700°C for 5 minutes. After a vigorous reaction, grind the resulting yellow powder and place it at 900°C (the heating rate is 300°C per hour) with hydrogen and The sintering was carried out in a reducing atmosphere mixed with nitrogen 4:96 for 3 hours. Cool the obtained sample to room temperature, wash with acid and alcohol, and sieve through a 400-mesh sieve to obtain YAG: Ce 3+ Powder.

example 3

[0033] Mix 2.4133g of yttrium oxide with 10mL of concentrated nitric acid with a mass fraction of 67% in a closed reaction kettle, heat to 120°C under magnetic stirring, and keep the temperature for 5 minutes. Dissolve 14.0674g of aluminum nitrate and 0.6741g of cerium nitrate in 30mL of deionized water, add 5.4g of urea as a combustion agent, and add 1.2g of polyethylene glycol as an organic dispersant.

[0034] After mixing the two solutions, place them in a high-temperature sintering furnace with an air atmosphere at 900°C for 15 minutes. After a vigorous reaction, grind the resulting yellow powder and place it at 1300°C (the heating rate is 300°C per hour) with hydrogen and The sintering was carried out in a reducing atmosphere mixed with nitrogen 4:96 for 6 hours. The obtained sample was cooled to room temperature, washed with acid and alcohol, and sieved through a 400-mesh sieve to obtain YAG: Ce 3+ Powder.

[0035] attached by figure 1 It can be seen that the doping ...

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Abstract

The invention relates to a method for preparing cerium-doped yttrium aluminum garnet powder in the technical field of luminescent materials, which comprises: weighing yttria according to the proportion of raw materials, and mixing the yttria and a concentrated nitric acid solution in a sealed reaction kettle; weighing aluminum nitrate and cerium nitrate, and dissolving the aluminum nitrate and the cerium nitrate into deionized water; mixing the two solutions to obtain a reaction precursor solution, adding urea which is 6 to 20 percent of the weight of the reaction precursor solution as an incendiary agent, and adding polyethylene glycol which is 0.5 to 2 percent of the weight of the reaction precursor solution as an organic dispersant; and placing the precursor solution into a sintering furnace, and obtaining a finished product. The method does not need ball milling and has no agglomeration phenomenon; samples have uniform particles and small particle diameter, and can be directly used for encapsulation; and the method gives full play to the optical performance of the samples to the maximum degree, and has simple and stable technology, low production cost and no environmental pollution.

Description

technical field [0001] The invention relates to a preparation method in the technical field of luminescent materials, in particular to a preparation method of cerium-doped yttrium aluminum garnet powder. Background technique [0002] Yttrium aluminum garnet, molecular formula Y 3 al 5 o 12 , referred to as YAG, has high melting point, high hardness, high temperature, low creep rate and low electrical conductivity, and stable chemical and thermal properties. It is a very excellent high-temperature structural material and can be used in the fields of insulation and refractory materials. At the same time, YAG belongs to the equiaxed crystal system and has no birefringence effect. It is a transparent ceramic with excellent optical properties and has important potential application prospects as a solid-state laser material. When YAG is doped with some rare earth element ions and transition metal ions, its powder can be used as an ultra-short afterglow material for cathode ray ...

Claims

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Application Information

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IPC IPC(8): C01F7/02C09K11/80
Inventor 孙康李万万严小松
Owner SHANGHAI JIAO TONG UNIV
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