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Effect of polymorphism of Al2O3 on the sintering and microstructure of transparent MgAl2O4 ceramics

机译：Al2O3的多态性对透明MgAl2O4陶瓷烧结和微观结构的影响

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摘要

Transparent MgAl2O4 ceramics were fabricated by reactive sintering in air followed by hot isostatic press treatment using commercial Al2O3 powder (gamma-Al2O3 or alpha-Al2O3) and MgO powder as raw materials. The densification rate, microstructure and optical properties of the ceramics were investigated. Densification temperature of the sample from gamma-Al2O3/MgO was lower than that from (alpha-Al2O3/MgO. However, in-line transmission (2 mm thick) of the sample from alpha-Al2O3/MgO at the wavelength of 600 nm and 1100 nm were respectively 77.7% and 84.3%, higher than those (66.7%, 81.4%) of the sample from gamma-Al2O3/MgO. SEM observation revealed that the sample from alpha-Al2O3/MgO exhibited a homogeneous and pore-free microstructure, while, the sample from gamma-Al2O3/MgO showed an apparent bimodal microstructure containing pores. (C) 2016 Elsevier B.V. All rights reserved.
机译：透明MgAl2O4陶瓷是通过在空气中进行反应性烧结，然后使用商品Al2O3粉末（γ-Al2O3或α-Al2O3）和MgO粉末为原料进行热等静压处理而制成的。研究了陶瓷的致密化速率，微观结构和光学性能。来自γ-Al2O3/ MgO的样品的致密化温度低于（α-Al2O3/ MgO的）致密化温度。但是，来自α-Al2O3/ MgO的样品在600 nm的波长下在线透射（2毫米厚）。 1100 nm分别为77.7％和84.3％，高于γ-Al2O3/ MgO样品的66.7％，81.4％。SEM观察表明，α-Al2O3/ MgO样品表现出均匀无孔的微观结构，而来自gamma-Al2O3 / MgO的样品显示出明显的双峰微观结构，包含孔洞（C）2016 Elsevier BV保留所有权利。

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  • 来源
    《Optical Materials》 |2017年第9期|62-65|共4页
  • 作者

    Han Dan; Zhang Jian; Liu Peng; Wang Shiwei;

  • 作者单位

    Chinese Acad Sci Shanghai Inst Ceram State Key Lab High Performance Ceram & Superfine Shanghai 200050 Peoples R China|Chinese Acad Sci Grad Univ Beijing 100049 Peoples R China;

    Chinese Acad Sci Shanghai Inst Ceram State Key Lab High Performance Ceram & Superfine Shanghai 200050 Peoples R China;

    Jiangsu Normal Univ Sch Phys & Elect Engn Xuzhou 221116 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Spinel; Reactive sintering; Microstructure; Optical property; Transparent ceramic;

    机译：尖晶石;反应烧结;微观结构光学性质;透明陶瓷;

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