Ba0.6Sr0.4TiO3 and BaZr0.3Ti0.7O3 thick films as tunable microwave dielectrics

Zimmermann, F.; Voigts, M.; Menesklou, Wolfgang; Ivers-Tiffée, Ellen

doi:10.1016/s0955-2219(03)00481-3

Cited by 105 publications

(46 citation statements)

References 16 publications

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“…The ferroelectric material Barium-Strontium-Titanate (BST) is one of the most promising candidates in the frequency range up to 15 GHz (Tagantsev et al 2003). Other tunable materials such as potassium-tantalate-niobate (KTN) (Laur et al 2005), silver-tantalate-niobate (ATN) (Zimmermann et al 2004a), barium-zirconate-titanate (BZT) (Xu et al 2005;Zimmermann et al 2004b), and bismuth-zinc-niobate (BZN) (Park et al 2005) can be used up to a few Megahertz only. Liquid crystals show very good performance above 10 GHz (Müller et al 2007;Karabey et al 2010).…”

Section: Introductionmentioning

confidence: 99%

Nonlinear ceramics for tunable microwave devices

et al. 2011

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The research on materials and systems for tunable microwave devices has gained attraction within the last years. The radio frequency characterization and the component design of tunable microwave components based on dielectric ceramics especially barium-strontium-titanate (BST) are presented in this second part, whereas the basic material properties are discussed in detail in the first part. After a short introduction to the processing technology used for the fabrication of tunable components based on a BST thick film, the relations between microwave properties and material properties as well as the microstructure are presented in detail. The design process for tunable microwave components based on BST thick films is described. Especially the considerations related to micro-and macrostructure and their connection are highlighted. The paper closes with two different application examples: a reconfigurable array antenna for satellite communication and varactors for high power applications.

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Section: Introductionmentioning

confidence: 99%

Nonlinear ceramics for tunable microwave devices

et al. 2011

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“…Zr is chosen as a B site dopant for such ABO 3 type perovskites due to its effective role in minimising the dielectric loss at low frequencies. Since zirconium is known as an effective substituent in BaTiO 3 to shift the Curie temperature downward and raise the other two phase transition temperatures, many investigations have focused on the effect of Zr 4+ ion additions [7][8][9]. In this work Ba(Ti 1−x Zr x )O 3 ceramics were prepared by a solid-state reaction technique.…”

Section: Introductionmentioning

confidence: 99%

Influence of ZrO_2 Addition on the Structure and Dielectric Properties of BaTiO_3 Ceramics

Öksüz

Şen

2017

Acta Phys. Pol. A

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Ba(Ti1−xZrx)O3 (x = 0 ÷ 0.3) ceramics were prepared by the standard solid state reaction method and were sintered at 1450• C for 4 h. The structural and dielectric properties of the samples were studied. The phases formed in the ZrO2 doped BaTiO3 were tetragonal and of cubic symmetry. Increase in ZrO2 content in the BaTiO3 caused to increase of the lattice parameter and crystallite size of the perovskite structure. The evolution of the Raman spectra was studied for various compositions and the spectroscopic signature of the corresponding phase was determined. The scanning electron microscope was used to investigate the microstructure and surface morphology of the sintered samples. Scanning electron microscope observations revealed enhanced microstructural uniformity and retarded grain growth with increase of ZrO2 content. Dielectric characteristics of ZrO2 doped barium titanate were studied using a Hioki 3532-50 LCR meter in the frequency range of 1 kHz-1 MHz. It is found that the dielectric constant (εr) increases while the dielectric loss (tan δ) decreases with increase in zirconium oxide content (x < 0.3).

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“…In the last few years, BZT ceramics have been used as a dielectric material in multi-layer ceramic capacitors (MLCC). The compositional and microstructure modification play important roles to meet the required dielectric constant and dielectric temperature characteristic, however, dependence of ferroelectric properties on Zr content has not been well understand [12,13]. In this work, the structure, dielectric * Electronic address: liwei_727@yahoo.cn properties and ferroelectric properties of the BaZr x Ti 1−x O 3 (x = 0.02 − 0.2) ceramics as a function of Zr content were systemically investigated.…”

Section: Introductionmentioning

confidence: 99%

Dielectric and piezoelectric properties of Ba(Zr xTi1-x)O3 lead-free ceramics

Chu

et al. 2010

Braz. J. Phys.

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Lead-free ceramics Ba(Zr x Ti 1−x )O 3 (x = 0.02 − 0.2) were prepared using a solid-state reaction technique. The structural and electrical properties were systemically investigated. Crystalline structures and microstructures were analyzed by X-ray diffraction and scanning electron microscope (SEM) at room temperature. All the samples possess pure perovskite structure. A small amount of Zr content has great effect on the microstructure of Ba(Zr x Ti 1−x )O 3 ceramics. The homogeneous microstructure with grain size about 30µm is obtained for the sample at x = 0.05. The phase transitions merge together in one peak for the samples at x = 0.10 and the highest dielectric constant 15900 is obtained for the sample at x = 0.15. The Ba(Zr x Ti 1−x )O 3 ceramics at x=0.05 exhibit excellent piezoelectric properties of high d 33 = 208 pC/N, k p = 31.5% and Q m = 500.

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Ba0.6Sr0.4TiO3 and BaZr0.3Ti0.7O3 thick films as tunable microwave dielectrics

Cited by 105 publications

References 16 publications

Nonlinear ceramics for tunable microwave devices

Nonlinear ceramics for tunable microwave devices

Influence of ZrO_2 Addition on the Structure and Dielectric Properties of BaTiO_3 Ceramics

Dielectric and piezoelectric properties of Ba(Zr xTi1-x)O3 lead-free ceramics

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