Synthesis of neodymium-doped yttrium aluminum garnet (YAG) nanocrystalline powders leading to transparent ceramics
Synthesis of neodymium-doped yttrium aluminum garnet (YAG) nanocrystalline powders leading to transparent ceramics
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DOI：
10.1016/j.materresbull.2004.04.005
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发表时间：
2004-07-02
影响因子：
5.4
通讯作者：
Loutts, GB
中科院分区：
文献类型：
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作者：
Pradhan, AK;Zhang, K;Loutts, GB
我们报告了通过共沉淀技术合成 Nd:YAG 纳米颗粒以及透明陶瓷加工的最佳条件。通过共沉淀技术制备的粉末表现出明显较少的微晶团聚，表明更高的可烧结性。微晶尺寸对煅烧温度的依赖性表明最佳温度为1100℃，在此温度下可以获得具有最高可烧结性的YAG纳米粉末的相纯度。我们已经证明，单轴压制样品的真空烧结最佳温度约为1785℃，以获得粒径均匀的约5-7μm的透明陶瓷，高于此温度，会发生巨大的晶粒长大，并有利于晶间区域形成大孔，使陶瓷在晶界处易碎。 (C) 2004 Elsevier Ltd. 保留所有权利。
We report on the synthesis of Nd:YAG nanoparticles by the coprecipitation technique and the optimum conditions for the processing of transparent ceramics. The powders prepared by the coprecipitation technique display significantly less agglomeration of crystallites, indicating higher sinterability. The crystallite size dependence on the calcinations temperature suggests the optimum temperature of 1100 degreesC, at which phase purity of the YAG nanopowder with the highest sinterability can be obtained. We have demonstrated that the optimum temperature for the vacuum-sintering is about 1785 degreesC for the uniaxially pressed samples to obtain transparent ceramic with uniform particle size of about 5-7 mum, and above this temperature, enormously large grain growth occurs, and facilitates large pores formation in the intergrain region that makes the ceramic fragile at the grain boundary. (C) 2004 Elsevier Ltd. All rights reserved.