Improving optical transmission of spark-plasma-sintered yag ceramics: Effect of powder conditioning and post-treatments

IF 0.5 4区材料科学 Q4 MATERIALS SCIENCE, CERAMICS

Journal of Ceramic Science and Technology Pub Date : 2018-03-01 DOI:10.4416/JCST2017-00052

L. Boilet, P. Aubry, L. Henrard, O. Deparis, P. Palmero, V. Lardot, F. Cambier, R. Pérez

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引用次数: 6

Abstract

Three YAG powders were densified by means of spark plasma sintering (SPS), with the aim of developing optically transparent ceramics. The influence of the physico-chemical characteristics of the powders (purity, agglomeration state and stoichiometry) on the sintering and the optical transmission was investigated. Depending on the powder type, different pre-treatments and/or post-treatments were necessary to increase both homogeneity and optical transmission of the densified parts. In the case of agglomerated powders, dispersion by ultrasonication was efficient and led to better homogeneity and higher optical transmission. Post-treatments such as annealing and post-hipping in air were helpful to reduce oxygen vacancies and residual porosities and improved the optical transmission of the ceramics. The highest values of real in-line transmission (RIT) were obtained under SPS conditions of 50 MPa at 1500 °C and after annealing in air at 1150 °C for 12 h. The achieved RIT value was equal to 66 % at the wavelength of 600 nm.

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提高火花等离子体烧结yag陶瓷的光传输:粉末调理和后处理的影响

采用放电等离子烧结（SPS）的方法对三种YAG粉体进行致密化，以研制光学透明陶瓷。研究了粉末的物理化学特性（纯度、团聚状态和化学计量）对烧结和光传输的影响。根据粉末类型，需要不同的预处理和/或后处理，以提高致密部分的均匀性和透光率。在团聚粉末的情况下，通过超声分散是有效的，并导致更好的均匀性和更高的光透射。退火和在空气中进行后处理有助于减少氧空位和残余孔隙率，并改善陶瓷的光学透射。在50MPa的SPS条件下，在1500°C下，以及在1150°C的空气中退火12小时后，获得了最高的实际在线传输（RIT）值。在600nm的波长下，获得的RIT值等于66%。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Ceramic Science and Technology MATERIALS SCIENCE, CERAMICS-

CiteScore

0.80

自引率

0.00%

发文量

期刊介绍： The Journal of Ceramic Science and Technology publishes original scientific articles on all topics of ceramic science and technology from all ceramic branches. The focus is on the scientific exploration of the relationships between processing, microstructure and properties of sintered ceramic materials as well as on new processing routes for innovative ceramic materials. The papers may have either theoretical or experimental background. A high quality of publications will be guaranteed by a thorough double blind peer review process.