Microstructure and dielectric properties of low temperature sintered ZnNb2O6 microwave ceramics

Gao, Feng; Liu, Jiaji; Hong, Richang; Li, Zhen; Chang-sheng, Tian

doi:10.1016/j.ceramint.2009.03.012

Cited by 41 publications

(9 citation statements)

References 12 publications

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“…Many researchers have shown that sintering of ZnNb 2 O 6 can be done around 900°C by adding low melting point glasses or oxides (e.g. CuO, V 2 O 5 , Bi 2 O 3 , B 2 O 3 ) [10][11][12]. Unfortunately, the Q 9 f value is reduced to *10,000 and the temperature coefficient of resonant frequency is not acceptable.…”

Section: Introductionmentioning

confidence: 95%

Effect of sintering parameters on the microstructure and microwave dielectric properties of Ba(Zn1/3Nb2/3)O3–ZnNb2O6 Ceramics

Gao

et al. 2014

J Mater Sci: Mater Electron

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Ba(Zn 1/3 Nb 2/3 )O 3 -ZnNb 2 O 6 (BZNZ) composite ceramics were fabricated by conventional solid solution processing. After optimizing the composition, the effects of the sintering parameters, such as the heating rate, the soaking time, and the cooling rate on densities, microstructure, and microwave dielectric properties were investigated using orthogonal experimental design method. The results show that with increasing the content of Ba(Zn 1/3 Nb 2/3 )O 3 , the e r increases, while the Q 9 f value increases first, then decreases, and s f shifts to the negative value. The BZNZ ceramics with composition of 0.3Ba(Zn 1/3 Nb 2/3 ) O 3 -0.7ZnNb 2 O 6 show the optimal dielectric properties. The results of orthogonal experimental design show that sintering parameters play an important role in the microstructure and dielectric properties. The ceramics show obvious duplex-grain structure. The importance sequence of the sintering parameters is: cooling rate [ heating rate [ soaking time. The sintering parameters were optimized, with 0.3Ba(Zn 1/3 Nb 2/3 )O 3 -0.7ZnNb 2 O 6 ceramic sintered at a heating rate of 2°C/min, soaking time of 8 h, and cooling in the air. Samples have the excellent dielectric properties: e r = 32.75, Q 9 f = 34,100, and s f = -10.2 ppm/°C.

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Section: Introductionmentioning

confidence: 95%

Effect of sintering parameters on the microstructure and microwave dielectric properties of Ba(Zn1/3Nb2/3)O3–ZnNb2O6 Ceramics

Gao

et al. 2014

J Mater Sci: Mater Electron

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“…They are made by stacking ferrite layers and dielectric layers with internal electrode pastes, and then cofired. The sintering temperature of ferrite and dielectrics must be below 900°C to ensure their cofiring with Ag internal electrode [2]. The properties of devices depend on the properties of the sintered ferrites, dielectrics and the quality of the interface.…”

Section: Introductionmentioning

confidence: 99%

Interface and ionic interdiffusion in cofired dielectrics/ferrite layer composites

Liu

2012

J Electroceram

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Zinc-magnesium titanate dielectrics/nickel-zinccopper ferrite layer composites were prepared. An interlayer was designed to relax the interfacial stress because of the mismatch shrinkage between dielectric and ferrite. And as the results, zero camber and crack-free dielectric/interlayer/ ferrite composite samples were obtained and the interface was continuous with no delamination. The cofiring interface and ionic interdiffusion between the constituents were investigated. The interdiffusion of the composite can be regarded as the semi-infinite diffusion-couple model and based on this diffusion model, the numerical simulation for the ionic composition distribution was carried out by computer, which was in agreement with the experimental results. The activation energies for the Ti 4+ , Ni 2+ , and Fe 3+ were determined respectively. The difference between apparent activation energies was discussed in this article. The layer composite sintered at 930°C exhibited the dielectric properties: ε r 018.2, tanδ03.01×10 −3 . Due to their low firing characteristics and realizable co-firing compatibility, the layer composites can serve as the promising medium materials in the multilayer LC filter.

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“…For instance, temperature stable dielectric material systems with high‐ Q × f values and near zero τ f values are synthesized with the presence of ZnNb 2 O 6 ceramic in: ZrTi 2 O 6 , BiNbO 4 , TiO 2 , Zn(Ta 1− x Nb x ) 2 O 6 ceramics. Furthermore, appropriate amounts of V 2 O 5 –Bi 2 O 3 –CuO, B 2 O 3 –CuO, BiVO 4 , CaF 2 , CuV 2 O 6 , ZnO–V 2 O 5 additions are also effective to decrease the sintering temperature of ZnNb 2 O 6 ceramic and still maintain microwave dielectric properties.…”

Section: Introductionmentioning

confidence: 99%

Intrinsic dielectric properties of columbite ZnNb₂O₆ ceramics studied by P–V–L bond theory and Infrared spectroscopy

et al. 2019

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In this study, intrinsic dielectric properties of ZnNb2O6 ceramics were investigated using P–V–L chemical bond theory and far‐infrared reflectivity spectra. The largest bond ionicity and bond susceptibility of Nb–O bonds suggest that the dielectric polarizability is mainly determined by Nb–O bonds. Relative permittivity, calculated via P–V–L bond theory, is close to experimental value determined using TE011 mode. The Nb–O bonds are also crucial for the structural stability. According to far‐infrared reflectivity spectra and complex dielectric function analysis, a relatively consistent result between calculated and measured dielectric properties, fit using classical damped oscillator mode, indicate that the B1u mode at 168.87 cm−1 provides majority contribution to the dielectric properties.

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Microstructure and dielectric properties of low temperature sintered ZnNb2O6 microwave ceramics

Cited by 41 publications

References 12 publications

Effect of sintering parameters on the microstructure and microwave dielectric properties of Ba(Zn1/3Nb2/3)O3–ZnNb2O6 Ceramics

Effect of sintering parameters on the microstructure and microwave dielectric properties of Ba(Zn1/3Nb2/3)O3–ZnNb2O6 Ceramics

Interface and ionic interdiffusion in cofired dielectrics/ferrite layer composites

Intrinsic dielectric properties of columbite ZnNb₂O₆ ceramics studied by P–V–L bond theory and Infrared spectroscopy

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Microstructure and dielectric properties of low temperature sintered ZnNb2O6 microwave ceramics

Cited by 41 publications

References 12 publications

Effect of sintering parameters on the microstructure and microwave dielectric properties of Ba(Zn1/3Nb2/3)O3–ZnNb2O6 Ceramics

Effect of sintering parameters on the microstructure and microwave dielectric properties of Ba(Zn1/3Nb2/3)O3–ZnNb2O6 Ceramics

Interface and ionic interdiffusion in cofired dielectrics/ferrite layer composites

Intrinsic dielectric properties of columbite ZnNb2O6 ceramics studied by P–V–L bond theory and Infrared spectroscopy

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Intrinsic dielectric properties of columbite ZnNb₂O₆ ceramics studied by P–V–L bond theory and Infrared spectroscopy