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The sintering behavior and microwave dielectric properties of Bi(Nb,Sb)O4 ceramics by Ning Wang; Mei-Yu Zhao; Wei Li; Zhi-Wen Yin is a Materials Science article available to read on EtoBox.

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Sb 2 O 5 were selected to substitute Nb 2 O 5 and the effects of substitution on the sintering behavior and the microwave dielectric properties of BiNbO 4 ceramics were studied. Solid solutions formed in sintered BiNb (1-x) Sb x O 4 ceramics with x value being no more than 0.4. The unit cell volume of orthorhombic phase BiNb (1-x) Sb x O 4 decreased from 331.86 to 324.99 Å 3 with x value increasing from 0 to 0.4. The densified temperatures increased from 800 to 940 • C. The microwave dielectric properties of BiNb (1-x) Sb x O 4 ceramics were found to be affected by the substitution of Sb for Nb and the sintering temperature. The saturated ε r values first increased from 44.00 to 44.61 with x increasing from 0 to 0.1 and then decreased to 40.69 with x to 0.4. The saturated Q × f values decreased with increasing of x value. The τ f values were correlated to the unit cell volume of BiNb (1-x) Sb x O 4 and continuously decreased from a positive value of 14.19 ppm/ • C for x = 0 to a negative value of -30.94 ppm/ • C for x = 0.4. At a sintering temperature of 820 • C and x value of 0.05, BiNb (1-x) Sb x O 4 ceramics exhibited the optimum microwave dielectric properties of ε r ∼ 44.49, Q

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Author

Ning Wang; Mei-Yu Zhao; Wei Li; Zhi-Wen Yin

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0272-8842)

Published

2004

Language

EN

Field

Materials Science (Physical Sciences)