Process for preparing yttrium aluminum garnet

A technology of yttrium aluminum garnet and aluminum nitrate, which is applied in the field of preparation technology of yttrium aluminum garnet, can solve problems such as difficulty in industrialization of optical properties, and achieve the effects of being beneficial to industrialization, saving energy and overcoming agglomeration

Inactive Publication Date: 2006-10-11
XIAMEN UNIV
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Problems solved by technology

[0015] The object of the present invention is to solve the problem that existing products cannot fully utilize the optical properties of YAG:Eu and the difficulty of industrialization, to provide a polymer network gel method, the production of YAG:Eu does not need to go through the process of ball milling, but after high te

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  • Process for preparing yttrium aluminum garnet
  • Process for preparing yttrium aluminum garnet
  • Process for preparing yttrium aluminum garnet

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Embodiment Construction

[0035] The following embodiments will further illustrate the present invention in conjunction with the accompanying drawings.

[0036] 1. Pure YAG

[0037] Add 61.31g of yttrium nitrate, 100g of aluminum nitrate and 269.60g of citric acid into 860g of deionized water, stir to dissolve, and adjust the pH value to pH=7 with ammonia water. Add 207.25g of acrylamide and 17.27g of N,N-methylenebisacrylamide after 10 minutes in a water bath at 70°C, and add 0.80g of tetraethylethylenediamine and 26.60g of 3% hydrogen peroxide after keeping warm in a 75°C water bath for 20 minutes Aqueous solution, keep warm in a 75°C water bath until it turns into a white gel. Keep the gel prepared above at 700°C for 3 hours to burn all the water and organic matter to obtain a white powder. The pure phase YAG powder can be obtained by keeping the obtained white powder at 850° C. for 1 hour, and the YAG nano powder with good crystal phase and good luminescent performance can be obtained by keeping ...

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Abstract

A method for preparation of yttrium aluminium garnet relates to a preparation technology for fluorescent powder, especially to a preparation technology for yttrium aluminium garnet activated by europium, which provides a method for preparation of yttrium aluminium garnet which adopts macromolecular network gelatinization, does not need to mill, without birdnesting or small birdnesting, can be directly used in packing and can exert its optical performance with a high limit, and is no environmental contamination and can save the cost. The method consists of adding aluminum nitrate, citric acid, yttrium nitrate and europium nitrate into a container, adding deionized water, adjusting pH value to neutral with ammonial solution,with a thermostatic bath, adding acrylamide and N,N- methylene biacrylamide, having a thermostatic bath until acrylamide and N,N- methylene biacrylamide dissolve, adding tetraethylethylene diamine and hydrogen dioxide solution to initiate the polymerization, obtaining the YAG macromolecular network gel by a thermostatic bath, then removing the moisture and the organic matter by heat treatment, by heat decomposition, decomposing concentrated nitric acid to corresponding oxidate,obtaining the powders by pre-calcination, then by high-temperature heat treatment, performing degree of crystallization to obtain YAG powders.

Description

technical field [0001] The invention relates to a preparation process of fluorescent powder, in particular to a preparation process of europium-activated yttrium aluminum garnet (YAG:Eu). Background technique [0002] Yttrium aluminum garnet (Yttrium Aluminum Garnet, YAG for short) is a crystal with high hardness and high melting point, and is optically isotropic, so it is a single crystal material with excellent performance. In addition, it also has excellent thermal conductivity, mechanical strength and good chemical properties, and has been widely used as an excellent ceramic material. YAG is an effective luminescent material, especially the luminescent material based on YAG doped with rare earth ions, which has attracted widespread attention because of its special advantages. Since the radius of the trivalent rare earth ion is related to Y 3+ Similar, easy to incorporate and replace Y 3+ Ions can obtain different colors of luminescence, so they are widely used as lase...

Claims

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Application Information

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IPC IPC(8): C09K11/80
Inventor 曾人杰肖清泉黄勇
Owner XIAMEN UNIV
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