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Nano-scaled χ-Al 2 O 3 powders with d 50 mean particle sizes from 17 to 314nm were prepared to investigate the size effect on their phase transformation. Structural properties and crystallization behavior as a function of thermal treatments of various-sized χ-Al 2 O 3 particles were examined by DTA, XRD and TEM characterizations. It was confirmed that the decrease...
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