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Synthesis and Processing of Nanocrystalline Aluminum Nitride

by Matthew Albert Duarte

Institution:	University of California – Riverside
Year:	2016
Keywords:	Materials Science; Aluminum Nitride; Bulk; CAPAD; Nanocrystalline; Processing; Synthesis
Posted:	02/05/2017
Record ID:	2132118
Full text PDF:	http://www.escholarship.org/uc/item/8n29p28r

Abstract

Synthesis, processing and characterization of nanocrystalline aluminum nitride has been systematically studied. Non-carbon based gas nitridation was used to reduce nanocrystalline γ-alumina, having a grain size of ~80 nm. Single phase aluminum nitride powder was obtained at firing temperatures of 1200°C. Further processing of AlN powders was performed by CAPAD (Current Activated Pressure Assisted Densification) to obtain dense single phase aluminum nitride. Dense bulk aluminum nitride was obtained at temperatures of 1300°C. The reason we were able to obtain dense AlN at such temperatures is due to the nature of the nanocrystalline powders.