Controlled amorphous crystallization: An easy way to make transparent nanoceramics

Controlled amorphous crystallization: An easy way to make transparent nanoceramics
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受控非晶结晶:制造透明纳米陶瓷的简单方法

DOI:
10.1016/j.optmat.2011.05.013
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发表时间:
2012-04
期刊:
影响因子:
3.9
通讯作者:
Li, Jiang-Tao
Li, Jiang-Tao
中科院分区:
材料科学3区
文献类型:
--
作者:
Mei, Lin;Liu, Guang-Hua;He, Gang;Wang, Li-Li;Li, Jiang-Tao

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透明纳米陶瓷的制备近年来引起了人们越来越多的兴趣。本研究开发了一种新的非晶态烧结-控制晶化(ASCC)方法,并以制备透明LaAlO_3/t-ZrO_2纳米陶瓷为例。基于Al_2O_3-La_2O_3-ZrO_2的共晶组成,合成了玻璃粉末,并进行了烧结,然后通过后热处理将其转变为纳米陶瓷。在1200℃下热处理2小时,得到了平均粒径为40 nm的透明LaAlO_3/t-ZrO_2纳米陶瓷。由于具有纳米级的微观结构,在800 nm(1 mm厚)处,陶瓷的透过率可达55%,维氏硬度为19.05 Gpa,断裂韧性为2.64MPam1/2。
Fabrication of transparent nanoceramics is attracting more and more interests recently. In this study a new method of amorphous sintering followed by controlled crystallization (ASCC) was developed, and transparent LaAlO3/t-ZrO2nanoceramic was prepared as an example. Based on a eutectic composition of Al2O3–La2O3–ZrO2, glass powders were synthesized, sintered, and then converted to nanoceramics by post-heat-treatment. The heat-treatment performed at 1200°C for 2h produced a transparent LaAlO3/t-ZrO2nanoceramic with an average grain size of 40nm. Due to the nanoscale microstructure, the ceramic showed a transparency up to 55% at 800nm (1mm thick), Vickers hardness of 19.05GPa, and fracture toughness of 2.64MPam1/2, respectively.
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期刊: 2007 Conference on Lasers and Electro-Optics (CLEO)
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