Process for preparing yttrium aluminum garnet

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...

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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 temperature The heat-treated powder is non-agglomerated or rarely agglomerated powder, which can be directly used for packaging, can maximize the optical properties of YAG:Eu, and can avoid environmental pollution problems caused by other liquid-phase methods, while saving costs. Preparation method of yttrium aluminum garnet

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