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Method for preparing YAG nano powder

A technology of nano-powder and preparation steps, which is applied in the field of inorganic materials and its preparation, which can solve the problems of harsh synthesis conditions, serious agglomeration, and long synthesis cycle, and achieve the effects of lowering the preparation temperature, reducing the chance of contact, and small particle size

Inactive Publication Date: 2008-08-27
SHANGHAI INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The solid phase reaction method is to mix yttrium oxide and alumina according to the stoichiometric ratio, and it needs to be calcined at 1600°C for a long time to obtain. The powder has large particles, severe agglomeration and transition phase; the sol-gel method is complicated. , requires harsh synthesis conditions and long synthesis cycle; precipitation method is because different cations have different sensitivities to pH values, so when synthesizing multi-component powders, the composition distribution is uneven; in addition, these can prepare nano-precursor powders, but still need about High temperature calcination at 1000°C is not conducive to the preparation of excellent YAG ceramics

Method used

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  • Method for preparing YAG nano powder

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Experimental program
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Effect test

Embodiment 1

[0011] Raw material Y 3+ Nitrate aqueous solution (0.3mol / L) 45ml and Al 3+ Nitrate aqueous solution (0.3mol / L) 75ml, cerium nitrate 0.1383g, citric acid 13.7290g, acrylamide monomer 21.3285g, N, N'-methylenebisacrylamide network agent 11.5431g, a little After heating to dissolve and cooling, 0.0119 g of an ammonium persulfate initiator was added. Polymerize at 80°C to obtain a gel, and continue to heat up to 95°C until it is completely dried into a powder to obtain a precursor.

[0012] Carbonize the precursor at 700°C under a nitrogen atmosphere to obtain a black solid (heat up for 135 minutes, hold for 120 minutes, cool down for 120 minutes), and then carry out calcination and decarburization at 800°C with oxygen (heat up for 60 minutes, hold for 60 minutes, cool down for 120 minutes) , to obtain a white powder, XRD spectrum and SEM photo results show that the obtained uniformly dispersed nano-YAG:Ce 3+ Powder.

Embodiment 2

[0014] Raw material Y 3+ Nitrate aqueous solution (0.05mol / L) 45ml and Al 3+ Nitrate aqueous solution (0.05mol / L) 75ml, cerium nitrate 0.06839g, citric acid 6.8558g, acrylamide monomer 10.6641g, N, N'-methylenebisacrylamide network agent 5.7676g, a little Heat to dissolve and cool, and then add 0.0001 g of ammonium persulfate initiator. Polymerize at 80°C to obtain a gel, and continue to heat up to 95°C until it is dried into a powder to obtain a precursor.

[0015] Carbonize the precursor at 700°C under a nitrogen atmosphere to obtain a black solid (heat up for 135 minutes, hold for 120 minutes, cool down for 120 minutes), and then carry out calcination and decarburization at 800°C with oxygen (heat up for 60 minutes, hold for 60 minutes, cool down for 120 minutes) , to obtain a white powder, the XRD spectrum and SEM photo results are the same as in Example 1.

Embodiment 3

[0017] Raw material Y 3+ Nitrate aqueous solution (1mol / L) 45ml and Al 3+ Nitrate aqueous solution (1mol / L) 75ml, add cerium nitrate 0.4610g, citric acid 45.7633g, acrylamide monomer 71.0950g, N, N'-methylenebisacrylamide network agent 38.4770g to the raw material solution, heat slightly After dissolving and cooling, 0.0396 g of an ammonium persulfate initiator was added. Polymerize at 80°C to obtain a gel, and continue to heat up to 95°C until it is completely dried into a powder to obtain a precursor.

[0018] Carbonize the precursor at 700°C under a nitrogen atmosphere to obtain a black solid (heat up for 135 minutes, hold for 120 minutes, cool down for 120 minutes), and then carry out calcination and decarburization at 800°C with oxygen (heat up for 60 minutes, hold for 60 minutes, cool down for 120 minutes) , to obtain a white powder, the XRD spectrum and SEM photo results are the same as in Example 1.

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Abstract

Disclosed is a process for preparing YAG nano-powder, which belongs to the inorganic materials and the preparation field. The invention utilizes acrylamide as monomer, employs N, N'-methylene diacrylamide as polymer network agent, utilizes Al(NO3)3Y(NO3)3, Ce(NO3)3*6H2O as raw materials, employs citric acid as regulator, and uses a polymer network gel method and an active carbon adsorption process to prepare the nano-powder of Y3Al5O12(YAG):Ce3+. The method is characterized in that requirements to raw materials are simple and inorganic saline solution can be utilized as the raw materials, the component of the obtained micro powder is mixed evenly, most importantly, the polymer network formed in the gel process and the active carbon decomposed under nitriding atmosphere reduce the contact opportunity of precursor grains, thereby agglomeration is reduced, the nano-powder which is small in grain size and uniform in dispersion can be obtained, thereby largely reducing preparation temperature of materials, and calcination temperature is only 800 DEG C.

Description

technical field [0001] The invention relates to a preparation method of YAG nanometer powder, which belongs to the field of inorganic materials and preparation thereof. Background technique [0002] Yttrium aluminum garnet Y 3 Al 5 o 12 (referred to as YAG) has excellent thermal conductivity and mechanical strength as well as good physical and chemical properties, high-intensity radiation and electron bombardment resistance, etc. Due to its superior performance, it has gradually been widely used in lasers, metal processing, medical treatment, etc. It is widely used as a matrix material for lasers and luminescence. As a laser material, YAG single crystal has excellent performance, but its preparation is difficult and expensive, while the preparation of YAG polycrystalline ceramics is relatively easy, so the preparation of polycrystalline YAG ceramics with the same performance as single crystal has gradually attracted people's attention. [0003] The performance of ceramic...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F17/00C04B35/443C04B35/50
Inventor 张骋李强步文博
Owner SHANGHAI INST OF TECH
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