Paper Titles
Preparation of SiBCN Microtubes from Melt-Spinnable Polymers
p.926
Layer Structure Growth of Orthorhombic Boron Nitride Thin Films by RF-PEPLD
p.929
Preparation of Microcrystalline CBN Abrasive
p.933
Property and Microstructure of Machinable B4C/BN Nanocomposites
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Spark Plasma Sintered AlN-BN Composites and its Dielectric Properties
p.940
Micro Pattern Making Method on AlN-hBN Composites Using Powder Blasting Process
p.943
Machining Characteristics of AlN-hBN Composites in End-Milling and Precision Lapping Processes
p.947
Synthesis of SiCW/(Mo,W)Si2 Composite by the "Chemical Oven" Self-Propagating Combustion Method
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Microstructure Change of Molybdenum Disilicide Heating Unit in Nitrogen Atmosphere at 1700°C
p.955

Spark Plasma Sintered AlN-BN Composites and its Dielectric Properties

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Abstract:

A series of samples of hexagonal boron nitride-aluminum nitride (10-90, 15-85, 20-80, 25-75, 30-70wt.%) ceramic composites were prepared by spark plasma sintering in a nitrogen atmosphere at 1650 °C-1800 °C for 5min. Different amounts of CaF2 were added as sintering aids. The effects of CaF2 and sintering temperature on densification and dielectric properties were discussed. The addition of CaF2 enhances relative dielectric constant and loss tangent of the samples. The increase in sintering temperature promotes the densification and decreases the dielectric loss tangent. When being sintered at 1700 °C, the relative density, dielectric constant and dielectric loss tangent of the sample with 15wt.%BN are 98.04%, 7.15 and 6.31×10-4 respectively.

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Periodical:

Key Engineering Materials (Volumes 368-372)

Pages:

940-942

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.368-372.940

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Online since:

February 2008

Authors:

Hai Yang Zhao, Wei Min Wang

Keywords:

AlN-BN Composite, Dielectric Property, Spark Plasma Sintering (SPS)

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© 2008 Trans Tech Publications Ltd. All Rights Reserved

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