Al2TeO6: Mechanism of phase formation and dielectric properties


Low-loss dielectrics with low sintering temperatures will facilitate microelectronics to reach the high levels of integration that wireless communications currently require. In this work the phase-formation mechanism of 1:1 Al2O3-TeO2 is proposed. It is shown that TeO2 oxidation, which occurs in air at >600 degrees C to form Te4O9 and TeO3, triggers Al2TeO6 formation. The dielectric permittivity of Al2TeO6 was calculated to be similar to 22 at 1 MHz. Al2TeO6 is a promising material for ceramic bodies or substrates for dielectric applications, (C) 2012 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.




Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering


Su, XM; Wu, AY; Vilarinho, PM

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The authors acknowledge the financial support from FEDER, QREN, COMPETE and FCT. X.S. acknowledges FCT for financial support (SFRH/BD/44311/2008).

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