Dielectric and Pyroelectric Studies of Tungsten—Bronze Structured Ba5SmTi3Nb7O30Ferroelectric Ceramics

Ganguly, Prasun; Devi, Sheela; Jha, A. K.; Deori, Kalyanjyoti

doi:10.1080/00150190902869772

Cited by 58 publications

(21 citation statements)

References 26 publications

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“…The nature of temperature dependence plots support its dielectric study. 41 The value of À is found to be 9:31 Â 10 2 C Á m À2 C À1 at a temperature of 450 C, which is quite high as compared to that of some earlier reported works on single crystals and/or ceramics such as LiNbO 3 …”

Section: Dielectric Propertiessupporting

confidence: 48%

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Dielectric response and pyroelectric properties of lead-free ferroelectric Ba₃(VO₄)₂

Pati¹,

Choudhary

Das

et al. 2015

J. Adv. Dielect.

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The current paper presents results of dielectric response, pyroelectric behavior and conductivity study of lead-free ferroelectric barium orthovanadate (Ba 3 (VO 4 Þ 2 or Ba 3 V 2 O 8 Þ ceramic, for a wide range of temperature and frequency. An X-ray diffraction study suggests the formation of a single-phase compound in trigonal crystal system. The SEM micrograph of gold-coated pellet sample shows well-defined and homogeneous morphology. Detailed studies of dielectric parameters (" r and tan ) of the compound as a function of temperature and frequency reveal their independence over a wide range of temperature and frequency. The nature of Polarization versus electric field (P-E) hysteresis loop of Ba 3 V 2 O 8 at room temperature suggests its ferroelectric nature. The temperature dependence of pyroelectric coefficient and figure of merits of the sample support its dielectric response. The nature of variation of dc conductivity with temperature confirms the Arrhenius and negative temperature coefficient of resistance (NTCR) behavior of the material.

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Section: Dielectric Propertiessupporting

confidence: 48%

“…41 Pyroelectric figure of merits such as voltage responsivity (F v Þ and detectivity (F d Þ are important parameters to study the utility of the materials for their heat sensing applications. 41 The voltage responsivity is generally calculated by using the empirical relation, 42,43 …”

Section: Polarization Studymentioning

confidence: 99%

Dielectric response and pyroelectric properties of lead-free ferroelectric Ba₃(VO₄)₂

Pati¹,

Choudhary

Das

et al. 2015

J. Adv. Dielect.

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“…The value of temperature from which the tand starts increasing significantly decreases with increase in frequency. As the value of tand increases in the high-temperature region, the conductivity of the samples increases [27].…”

Section: Methodsmentioning

confidence: 97%

Structural and electrical properties of BiFeO3–PbTiO3 system

Panda

Pattanayak²,

Choudhary

2015

J Mater Sci: Mater Electron

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The polycrystalline samples of lead titanatemodified bismuth ferrite [i.e., (BiFeO 3 ) 1-x ? (PbTiO 3 ) x with x = 0.0, 0.1, 0.2, 0.3] were synthesized by a hightemperature solid-state reaction route. The formation of the materials was confirmed through basic structural analysis using X-rays diffraction data collected at room temperature. Detailed studies of dielectric and impedance characteristics of the materials in a wide frequency (1 kHz-1 MHz) and temperature (30-500°C) ranges using complex impedance spectroscopic method have provided many new results. The frequency dependence of ac conductivity suggests that the samples obey Jonscher's universal power law. A strong corelation between the micro-structural and impedance parameters was observed. The frequency-temperature dependence of electric modulus and impedance parameters of the materials shows the presence of non-Debye type of relaxation.

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“…Tungsten bronze (TB) structure compound consisting of a framework of distorted BO 6 octahedral corner sharing by three different types of interstices (A, B, C) which are available for many cations occupation having general formula (A 1 ) 2 (A 2 ) 4 (C) 4 (B 1 ) 2 (B 2 ) 8 O 3 [6] where A 1 and A 2 sites are commonly filled by divalent or trivalent cations, B 1 and B 2 sites by tetravalent or pentavalent cations and C site being small, regularly remains vacant giving the general formula A 6 B 10 O 30 . So in comparison to provskite structure, there is a scope for substitution of several cations at different interstitial sites (i.e., A 1 , A 2 , B 1 and B 2 ) that may alter the physical properties of the compound for various device applications [7]. Ganguly et al [8] have been reported the structural, dielectric and electrical studies of Ba 5 SmTi 3 Nb 7 O 30 ferroelectric ceramics.…”

Section: Introductionmentioning

confidence: 99%

Study of Structural and Dielectrical Properties of Lead Free Polycrystalline Electro Ceramics Ba5CaTi2Nb8O30 (BCTN) for Microwave Tunable Device Applications

Jindal¹,

Devi²,

Vasishth³

et al. 2018

MSA

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Tungsten bronze structure ceramics have found vital potential in many applications such as actuators, transducer, electro-optic, ferroelectric random access memory and microwave devices. These type ceramics are extensively used in many industrial applications due to their spontaneous polarization and wellknown for its high dielectric constant, low dielectric loss, low leakage current density, good thermal stability and high piezoelectric coefficient. In present work, Ba 5 CaTi 2 Nb 8 O 30 (BCTN) has been synthesized first time through solid state reaction method. The microstructures, dielectric, ferroelectric, ferromagnetic and Raman spectra have been investigated by means of X-ray diffraction, Scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDAX), LCR meter, P-E loop tracer, VSM and Raman spectrometer respectively. X-ray diffraction study revealed the formation of single phase tetragonal structure with space group P4bm. The crystallite size was observed to be in the range 14.4 nm. Detailed dielectric properties of BCTN compound as function of temperature at different frequencies show that sample exhibits diffuse type transition at curie temperature 316˚C. The P-E and M-H studies confirmed the coexistent ferroelectricity and magnetism at room temperature.

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Dielectric and Pyroelectric Studies of Tungsten—Bronze Structured Ba₅SmTi₃Nb₇O₃₀Ferroelectric Ceramics

Cited by 58 publications

References 26 publications

Dielectric response and pyroelectric properties of lead-free ferroelectric Ba₃(VO₄)₂

Dielectric response and pyroelectric properties of lead-free ferroelectric Ba₃(VO₄)₂

Structural and electrical properties of BiFeO3–PbTiO3 system

Study of Structural and Dielectrical Properties of Lead Free Polycrystalline Electro Ceramics Ba<SUB>5</SUB>CaTi<SUB>2</SUB>Nb<SUB>8</SUB>O<SUB>30</SUB> (BCTN) for Microwave Tunable Device Applications

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Dielectric and Pyroelectric Studies of Tungsten—Bronze Structured Ba5SmTi3Nb7O30Ferroelectric Ceramics

Cited by 58 publications

References 26 publications

Dielectric response and pyroelectric properties of lead-free ferroelectric Ba3(VO4)2

Dielectric response and pyroelectric properties of lead-free ferroelectric Ba3(VO4)2

Structural and electrical properties of BiFeO3–PbTiO3 system

Study of Structural and Dielectrical Properties of Lead Free Polycrystalline Electro Ceramics Ba&lt;SUB&gt;5&lt;/SUB&gt;CaTi&lt;SUB&gt;2&lt;/SUB&gt;Nb&lt;SUB&gt;8&lt;/SUB&gt;O&lt;SUB&gt;30&lt;/SUB&gt; (BCTN) for Microwave Tunable Device Applications

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Dielectric and Pyroelectric Studies of Tungsten—Bronze Structured Ba₅SmTi₃Nb₇O₃₀Ferroelectric Ceramics

Dielectric response and pyroelectric properties of lead-free ferroelectric Ba₃(VO₄)₂

Dielectric response and pyroelectric properties of lead-free ferroelectric Ba₃(VO₄)₂

Study of Structural and Dielectrical Properties of Lead Free Polycrystalline Electro Ceramics Ba<SUB>5</SUB>CaTi<SUB>2</SUB>Nb<SUB>8</SUB>O<SUB>30</SUB> (BCTN) for Microwave Tunable Device Applications