| Summary: | 碩士 === 國立交通大學 === 電子研究所 === 81 === Oxide glasses have been used as liquid phase sintering aids for
AlN ceramics. The effect of oxide and oxide glasses on the
oxidation of AlN powder is investigated. Yttria-alumina-
silicate glass (Y2O3-Al2O3-SiO2 glass) is more suitable than
yttria (Y2O3) and lead-boro-silicate glass ( PbO-B2O3-SiO2
glass ) for use as sintering aid. PbO and B2O3 promote the
oxidation, while SiO2, Al2O3, and Y2O3 have no influence on the
oxidation. The dielec- tric constant, dissipation factor,
complex impedance, thermal expansion coefficient, and thermal
conductivity of the samples are studied. The influence of
various glassy phases and dopants on electrical and thermal
properties are discussed in detail. Base on these studies
approaches to improve sintering behavior, electrical and
thermal properties are proposed.
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