Please use this identifier to cite or link to this item:
http://hdl.handle.net/10773/19300
Title: | Hydrolysis Control of AlN Powders for the Aqueous Processing of Spherical AlN Granules |
Author: | Wang, Qi Olhero, Susana M. Ferreira, Jose M. F. Cui, Wei Chen, Kexin Xie, Zhipeng |
Keywords: | ALUMINUM NITRIDE POWDER GAS-REDUCTION-NITRIDATION THERMAL-CONDUCTIVITY CERAMICS PARTICLES PHOSPHATE DEGRADATION GRANULATION SUSPENSIONS PROTECTION |
Issue Date: | 2013 |
Publisher: | WILEY-BLACKWELL |
Abstract: | Spherical granules of aluminum nitride (AlN) with an average particle size of about 50m were produced from aqueous suspensions using an AlN powder surface treated against hydrolysis with aluminum dihydrogenphosphate [Al(H2PO4)3]. Two different amounts of Al(H2PO4)3 were tested and the effects of surface treatment and aging time were evaluated by various techniques (XRD, TG-DTA, zeta potential and pH measurements). The treated powder exhibited antihydrolytic property and good dispersing behavior, enabling the preparation of low-viscosity and high-concentration aqueous AlN slurries for freeze granulation. The spherical AlN granules were sintered in a boron nitride (BN) powder bed followed by ultrasonic washing of the AlN granulates/BN mixture to remove BN. The sintered spherical AlN granules present excellent crystallinity and high sphericity as observed from SEM micrographs. |
Peer review: | yes |
URI: | http://hdl.handle.net/10773/19300 |
DOI: | 10.1111/jace.12288 |
ISSN: | 0002-7820 |
Publisher Version: | 10.1111/jace.12288 |
Appears in Collections: | CICECO - Artigos |
Files in This Item:
File | Description | Size | Format | |
---|---|---|---|---|
Hydrolysis Control of AlN Powders for the Aqueous Processing of Spherical AlN Granules_10.1111jace.12288.pdf | 313.31 kB | Adobe PDF |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.