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:
Aluminum nitride ceramics were sintered with 1.0 and 4.8 mass% Ca3Al2O6 (C3A) as a sinteringadditive. Temperature dependence of cathodoluminescence (CL) for the ceramics was investigatedin order to obtain information on lattice defects. The CL peak intensity at 3.5 eV in the ceramicssintered with 1.0 mass% C3A decreased with increasing temperature, so called thermal quenching.The maximum CL peak intensity of the ceramics sintered with 4.8 mass% C3A was much lowerthan that with 1.0 mass% C3A, reflecting that the oxygen-induced defect density dramaticallydecreased with increasing amount of C3A. In case of the ceramics sintered with 4.8 mass% C3A, theCL peak intensity at 3.4 eV showed the thermal quenching in the range of 130 - 350 K, whereas inthe range of 80 - 130 K and 350 - 475 K, it increased with increasing temperature, so called“negative” thermal quenching. From the results, we suggest a presence of at least two trappinglevels in the ceramics sintered with C3A
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/01/57/transtech_doi~10.4028%252Fwww.scientific.net%252FKEM.388.261.pdf
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