Effects of Bi3+ substitution for Nd3+ on microwave dielectric properties of Ca0.61(Nd1−Bi )0.26TiO3 ceramics

Qu, Jingjing; Liu, Fei; Yuan, Changlai; Liu, Xinyu; Chen, Guohua

doi:10.1016/j.matlet.2015.07.056

Cited by 22 publications

(1 citation statement)

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“…Matjaz Valant et al [7] demonstrated that the s f value was closely related to the ratio of mean radii (r A /r B ) of A and B-site ions. Among current commercial microwave dielectric materials, extensive attention has been focused on A-site substitution for Ba 6-3x Nd 8?2x Ti 18 O 54 ceramics to lower the s f while the dielectric loss climbed steeply [8][9][10][11][12][13]. Al 3?…”

Section: Introductionmentioning

confidence: 99%

Microstructure and microwave dielectric properties of BaNd2Ti4−xAl4x/3O12 ceramics

Chen

Kang

et al. 2016

J Mater Sci: Mater Electron

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Using the solid-state ceramic route, BaNd 2 Ti 4-x Al 4x/3 O 12 (0 B x B 0.15) ceramics were prepared, and the structure, microstructure, and microwave dielectric properties were investigated. The XRD results suggest the formation of single solid solution phase with orthorhombic structure for all studied compositions (0 B x B 0.15) and the unit cell volume decreases linearly with x. The SEM results also show no evidence of secondary phase. A small amount of substitutions improves quality factor (Q 9 f) and the temperature coefficient of resonant frequency (s f ) but leads to a decrease of the permittivity. The s f value is found to decrease with increasing substitutions because of the declination of tolerance factor (t). And the s f can be adjusted from 79.5 to 38.3 ppm/°C with increment of substitutions. Finally, excellent dielectric properties are achieved as x = 0.1 sintered at 1320°C for 4 h in air: e r = 86.1, Q 9 f = 9702 GHz, s f = 43.1 ppm/°C. The Q 9 f value is strongly affected by the annealing process. The samples annealed at 1100°C for 15 h exhibit the best microwave dielectric properties.

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Section: Introductionmentioning

confidence: 99%