NDLI: Synthesis of an aluminum nitride–yttria (AlN–Y$_{2}$O$_{3}$) composite from nano-sized porous AlN and YCl$

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Synthesis of an aluminum nitride–yttria (AlN–Y$_{2}$O$_{3}$) composite from nano-sized porous AlN and YCl$_{3}$

Content Provider	Springer Nature Link
Author	Pee, Jae Hwan Park, Jong Chul Hwang, Kwang Taek Kim, SooRyong Cho, Woo Seok
Copyright Year	2010
Abstract	In order to enhance the thermal conductivity of aluminum nitride (AlN) with sintering additives including yttria (Y$_{2}$O$_{3}$), it is necessary to form yttrium aluminate garnet (YAG) and secondary phases both within and around the boundaries of AIN drains. Nano-sized porous AlN particles were produced to form YAG and secondary phases within AlN grains, after which a AlN–Y$_{2}$O$_{3}$ nano–nano composite was formed from AlN and amorphous Y$_{2}$O$_{3}$. Porous AlN powders were first successfully synthesized by the chemical vapor synthesis (CVS) method. Highly crystalline and nano-sized porous AlN powders were synthesized at 1,200 °C. Brunauer–Emmett–Teller (BET) analysis showed that these powders had very large surface areas, suggesting that the particles approached nano-scale sizes with very small pores. To form composites of Y$_{2}$O$_{3}$ and AlN, we prepared a yttrium source solution that infiltrated the nano-sized pores of the AlN particles. Such an infiltration of AlN with amorphous Y$_{2}$O$_{3}$ was expected to effectively reduce the residual oxygen content by facilitating the formation of YAG and secondary phases during the sintering process. We characterized the composite powders of AlN–Y$_{2}$O$_{3}$ and the sintered bodies using BET, XRD, SEM, TEM, and thermal conductivity analyses.
Starting Page	801
Ending Page	809
Page Count	9
File Format	PDF
ISSN	09226168
Journal	Research on Chemical Intermediates
Volume Number	36
Issue Number	6-7
e-ISSN	15685675
Language	English
Publisher	Springer Netherlands
Publisher Date	2010-09-16
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	AlN Chemical vapor synthesis Sintering aid Yttrium aluminate garnet Nano-nano composite Inorganic Chemistry Physical Chemistry Catalysis
Content Type	Text
Resource Type	Article
Subject	Chemistry

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