Improved quality factor of NdNbO4 microwave dielectric ceramic by Mn2+ substitution

Song, Zhenkun; Zhang, Ping; Wang, Yue; Li, Lingxia

doi:10.1016/j.jallcom.2013.09.023

Cited by 29 publications

(15 citation statements)

References 18 publications

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“…value depended on the specimens and fabrication process used. It has been reported that Q·f depended on the extrinsic factors such as density, impurity, secondary phase and grain size, and intrinsic factors such as crystal structure and lattice defects [23][24][25]. In this work, as shown in Fig.…”

Section: Resultsmentioning

confidence: 66%

Preparation, characterization, and dielectric properties of wolframite-structure MnZrNb 2 O 8 ceramics at microwave frequency

Pan

Feng

et al. 2015

Journal of Alloys and Compounds

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Section: Resultsmentioning

confidence: 66%

Preparation, characterization, and dielectric properties of wolframite-structure MnZrNb 2 O 8 ceramics at microwave frequency

Pan

Feng

et al. 2015

Journal of Alloys and Compounds

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“…6, and τ f of −24 ppm°C −1 was first reported by Kim et al 3 In our previous study, we studied the microwave dielectric properties of NdNbO 4 doped with CaF 2 . 6 However the correlation between crystal structure and microwave dielectric properties of NdNbO 4 was not disscussed. 4 We also presented the effect of CaTiO 3 addition on the microwave dielectric properties of NdNbO 4 ceramic.…”

Section: Introductionmentioning

confidence: 62%

Correlation of crystal structure and microwave dielectric properties of Nd_1.02(Nb_1−xTa_x)_0.988O₄ ceramic

et al. 2015

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The phase structures of Nd1.02(Nb1-xTax)0.988O4 ceramics were analyzed via multiphase structure refinement. The X-ray diffraction patterns of Nd1.02(Nb1-xTax)0.988O4 showed that the monoclinic fergusonite structure of NdNbO4 and a second phase NdTa7O19 were obtained. The oxygen octahedron distortion was investigated according to the supercell of the NdNbO4 ceramic. The correlations between packing fractions, bond valences and microwave dielectric properties were discussed. For the main phase NdNbO4, as the polarizabilities increased, the ε increased. The Q × f value was mainly attributed to the packing fraction. With the increase of bond valence of the B-site and the oxygen octahedron distortion, the τf value decreased. The substitution of Ta(5+) for Nb(5+) effectively influenced the microstructure and the microwave dielectric properties of NdNbO4 ceramics. Optimal microwave dielectric properties can be obtained for Nd1.02(Nb0.94Ta0.06)0.988O4 ceramics at x = 0.06.

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“…High quality factor Q 9 f is a significant index for applications of microwave dielectric ceramics [17]. The microwave dielectric loss is mainly caused not only by the lattice vibrational modes, but also by impurities, second phase, pores, lattice defect, grain boundary, and grain morphology [18,19]. The Q 9 f value first increased and then decreased, which showed the same variation as that of the dielectric constant with sintering temperature.…”

Section: Methodsmentioning

confidence: 99%

Effect of MgO, BaO and La2O3 additions on microwave dielectric properties of (Zr0.8Sn0.2)TiO4 ceramics

Qian

Zhou

Jiang

et al. 2016

J Mater Sci: Mater Electron

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The effects of MgO, BaO and La 2 O 3 on (Zr 0.8 Sn 0.2 )TiO 4 (ZST) ceramics has been investigated. MgO, BaO and La 2 O 3 as additives showed no obvious influence on the phase of the ZST ceramics and all the samples exhibited a-PbO orthorhombic structure. Appropriate additions could effectively facilitate sintering of ceramics and well-densified microwave ceramics with uniform grains could be obtained under 1340°C. In addition, it is found that appropriate additions could maintain and even improve microwave dielectric properties of ZST ceramics. The ZST sample with 1 wt% of La 2 O 3 , 0.6 wt% MgO and 0.4 wt% BaO, sintered at 1340°C for 5 h, was measured to show excellent microwave dielectric properties, with an er of 38.68, a Q 9 f value of 42,300 and sf value of ?5.4 ppm/°C.

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Improved quality factor of NdNbO4 microwave dielectric ceramic by Mn2+ substitution

Cited by 29 publications

References 18 publications

Preparation, characterization, and dielectric properties of wolframite-structure MnZrNb 2 O 8 ceramics at microwave frequency

Preparation, characterization, and dielectric properties of wolframite-structure MnZrNb 2 O 8 ceramics at microwave frequency

Correlation of crystal structure and microwave dielectric properties of Nd_1.02(Nb_1−xTa_x)_0.988O₄ ceramic

Effect of MgO, BaO and La2O3 additions on microwave dielectric properties of (Zr0.8Sn0.2)TiO4 ceramics

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Improved quality factor of NdNbO4 microwave dielectric ceramic by Mn2+ substitution

Cited by 29 publications

References 18 publications

Preparation, characterization, and dielectric properties of wolframite-structure MnZrNb 2 O 8 ceramics at microwave frequency

Preparation, characterization, and dielectric properties of wolframite-structure MnZrNb 2 O 8 ceramics at microwave frequency

Correlation of crystal structure and microwave dielectric properties of Nd1.02(Nb1−xTax)0.988O4 ceramic

Effect of MgO, BaO and La2O3 additions on microwave dielectric properties of (Zr0.8Sn0.2)TiO4 ceramics

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Correlation of crystal structure and microwave dielectric properties of Nd_1.02(Nb_1−xTa_x)_0.988O₄ ceramic