Publication Date:
2015-02-25
Description:
According to the solid-state reaction, microwave dielectric ceramics of Ba 6−3 x Nd 8+2 x [Ti 1− z (Ni 1/3 Nb 2/3 ) z ] 18 O 54 ( x = 0.75, 0 ≤ z ≤ 0.2) were fabricated. Microwave dielectric properties, including relative dielectric constant (ε r ), quality factor ( Qf ), and temperature coefficient of resonant frequency (τ f ), were investigated as a function of substitution content. As z increasing from 0 to 0.2, dielectric constant was decreased from 87.3 to 80.4, Qf value declined from 9700 to 1200 GHz, and τ f dropped from +60.0 to −27.0 ppm/°C. Appropriate substitution conducted excellent microwave dielectric properties with z = 0.05 sintered at 1375°C for 2 h in air: ε r = 82.25, Qf = 6100 GHz, and τ f = +18 ppm/°C.
Print ISSN:
1546-542X
Electronic ISSN:
1744-7402
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
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