ISSN:
1013-9826
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
In this paper, transparent polycrystalline magnesium aluminate spinel was fabricated by hotpressing ultra fine high purity spinel powder using LiF as the sintering aid in vacuum, then hot isostaticpressing (HIPing) the sintered body to improve the optical properties of the sample. The transmittanceand the strength of the samples before and after HIPing were measured; morphologies of the fracturesurface of the samples before and after HIPing were observed. Following hot pressing, the grain size ofthe sample is small; the transmission values are low and may varied at different sites in the same sample.After HIPing, the strength of the sample decreased, the grain size increased obviously, and thetransmittance and the uniformity of transmittance increased significantly. The panel of transparentspinel up to 200 mm in diameter and 8 mm thick was fabricated by this method; the averagetransmittance of the spinel is above 80% in the range between 2 μm and 5 μm
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/53/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.336-338.1200.pdf
