期刊
CERAMICS INTERNATIONAL
卷 43, 期 9, 页码 6891-6897出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2017.02.110
关键词
Spinel; Hot-pressing; Transparent ceramics; Sintering aids
资金
- National Natural Science Foundation of China [61575212]
- NSFC-RFBR [1151101157/16-52-53059-GammaPhiEH_a]
- Russia-China Inter-governmental S & T cooperation program
- Program of Presidium of RAS [15-17-2-20]
- Act 211 Government of the RF [02. A03.21.0006]
Transparent magnesium aluminate spinel (MgAl2O4) ceramics were fabricated by hot-pressing of the MgO and alpha-Al2O3 powder mixture using LiF as a sintering aid. Effects of the LiF additive on densification, microstructure and optical properties of MgAl2O4 ceramics were systematically investigated. It has been found that the addition of LiF can effectively remove the porosity and increase the optical transparency of MgAl2O4 ceramics. For the spinel ceramics HP-ed at 1550 degrees C for 3 h with 1 wt% LiF addition, the average grain size is about 36 mu m and the in-line transmittance exceeds 60% at the wavelength of 800 nm.
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