Effect of Ba2+ in BNT ceramics on dielectric and conductivity properties

Rao, K. Sambasiva; Rajulu, Kuan China Varada; Tilak, B.; Swathi, A.

doi:10.4236/ns.2010.24043

Cited by 20 publications

(11 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, the exponent s 2 in all the samples reached a minimum at ~400ºC, which was the onset of the sharp rise in temperature-dependent dielectric loss curves (Fig. Within the same temperature region, E a reduced with frequency, which is also observed in other systems [48,62]. Within the same temperature region, E a reduced with frequency, which is also observed in other systems [48,62].…”

Section: Ac Conductivitysupporting

confidence: 65%

Structure and electrical properties of lead-free Bi_0.5Na_0.5TiO₃-based ceramics for energy-storage applications

et al. 2016

View full text Add to dashboard Cite

optimum energy-storage properties were obtained in 0.90(BNT-BT)-0.10NT with energy-storage density of 1.2 J/cm 3 and energy-storage efficiency of 74.8% at 10 kV/mm. The results demonstrate that (1 -x)(BNT-BT)-xNT ceramics are promising candidate for high-temperature energy-storage application. IntroductionCapacitors play an important role in energy-storage system. Compared to batteries, capacitors possess faster charge-discharge time and higher power density [1,2]. However, the energy that capacitor dielectrics can store is much less than fuel cells or lithium ion batteries [3]. Thus, the development of new capacitor materials with high energy-storage capacity is a challenge for researchers. Additionally, since electronic equipment is often exposed to extreme temperatures in industrial applications, such as space exploration and deep oil / gas well drilling [4,5], the temperature reliability of capacitor materials is also very important. Bi 0.5 Na 0.5 TiO 3 (BNT) based ceramics have been actively studied for energy-storage application in recent years [6-10]. Among the reported systems, (1x)Bi 0.5 Na 0.5 TiO 3 -xBaTiO 3 (BNT-BT) binary solid solution at the morphotropic phase boundary (MPB, 0.06 ≤ x ≤ 0.10)[11] is a promising candidate for high-temperature energy-storage capacitors. On the one hand, the existence of double dielectric anomalies over the studied temperature range can help to improve the temperature stability of the dielectric properties. On the other hand, BNT-BT shows large maximum polarization, which is favorable for obtaining high energy-storage density. Modifications of BNT-based high-temperature energy-storage ceramics focus on expanding the temperature range with stable permittivity, as well as improving their energy-storage density and efficiency. Niobates are the most widely reported members to modify the dielectric and ferroelectric properties of BNT-based ceramics, such as NaNbO 3 [12, 13], KNbO 3 [14, 15], (Li, Ag)NbO 3 [16], Na 0.5 K 0.5 NbO 3 [17-20], and (Na, Bi)NbO 3 [21]. Tantalum and niobium belong to same family in the periodic table of elements. According to J. König [22] and M. Spreitzer [23], tantalate addition can significantly broaden the dielectric anomaly of BNT ceramics. However, the exact dielectric temperature stability has not been reported, neither has the effect of tantalate on the ferroelectric properties.To explore the potential use of tantalate modified BNT-based ceramics for temperature-stable energy-storage application, a new system based on (1x)(0.92Bi 0.5 Na 0.5 TiO 3 -0.08BaTiO 3 )-xNaTaO 3 ((1 -x)(BNT-BT)-xNT) ternary solid solution was prepared in this work. The effects of NT on the structure, dielectric stability, electrical properties, and energy-storage properties of the system were comprehensively investigated. Experimental Procedure(1 -x)(BNT-BT)-xNT (x = 0.01, 0.03, 0.05, 0.10, 0.15) ceramic samples were prepared by traditional solid-state reaction method [8,[24][25][26]. First, the raw powders Bi 2 O 3 (purity 99.0%), Na 2 CO 3 (purity 99.8%), TiO 2 (p...

show abstract

Section: Ac Conductivitysupporting

confidence: 65%

Structure and electrical properties of lead-free Bi_0.5Na_0.5TiO₃-based ceramics for energy-storage applications

et al. 2016

View full text Add to dashboard Cite

show abstract

“…Sinclair and West [33,34] suggested the combined usage of impedance and modulus spectroscopic plots to rationalize the dielectric properties. Thus, the power of combined usage of both impedance and modulus spectroscopy is that the Z ′ -Z ′′ plot highlights the phenomenon with the largest resistance whereas M ′′ vs. M ′ picks up those of the smallest capacitance [35]. The imaginary parts of the impedance and electric modulus are expressed as: 2 (1a)…”

Section: Electric Propertiesmentioning

confidence: 99%

Structure and electrical properties of (Bi,Na)0.94Ba0.06Ti1-x(Mg1/3Nb2/3)xO3 ceramics

Prasad¹,

Kumar²,

Prabhat³

et al. 2018

PAC

View full text Add to dashboard Cite

In this work the effect of pseudo-cation (Mg 2+ 1/3 Nb 5+ 2/3) 4+ addition on Ti-site of (Bi 0.5 Na 0.5) 0.94 Ba 0.06 TiO 3 ceramics, having general formula (Bi,Na) 0.94 Ba 0.06 Ti 1-x (Mg 1/3 Nb 2/3) x O 3 (0 ≤ x ≤ 1), on their structural and electrical properties was investigated. These compounds were prepared using a standard high temperature solid-state reaction technique and characterized by structural, microstructural, impedance, and conductivity studies. The sintered ceramics are almost phase-pure perovskite materials showing high bulk densities (>95% TD), uniform microstructure and satisfactory impedance properties in all the samples. Besides, an attempt has been made to ascertain the role of grains and grain boundaries on the electrical properties of these solid solutions and their dependence on the temperature and frequency, using complex impedance spectroscopy technique. The obtained data analysed in the framework of AC conductivity, complex impedance as well as electric modulus formalisms indicate on dominant negative temperature coefficient of resistance (NTCR) character of the materials due to the contribution of semiconducting grains. Further, the dielectric relaxation in the material was seen to be of non-Debye type.

show abstract

“…To improve the piezoelectric properties, a number of BNT-based solid solutions, such as BNT-Bi 0.5 K 0.5 TiO 3 [7], (1− x − y)Bi 0.5 Na 0.5 TiO 3 -xB i0.5 K 0.5 TiO 3 -yBi 0.5 Li 0.5 TiO 3 [8], BNT-NaNbO 3 [9], BNT-BaTiO 3 -Bi 0.5 Li 0.5 TiO 3 [10], Bi 0.5 Na 0.5 TiO 3 -SrTiO 3 -Bi 0.5 Li 0.5 TiO 3 [11], BNT-Bi 0.5 K 0.5 TiO 3 -BaTiO 3 [12] and Bi 0.5 Na 0.5 TiO 3 -Bi 0.5 Li 0.5 TiO 3 [13] have been developed and studied intensively [14]. The Bi 0.5 Na 0.5 TiO 3 -based piezoelectric substituted by Ba 2+ [15,16] and the effect of Ba 2+ in BNT ceramics on dielectric and conductivity properties have been studied [17]. Piezoelectric and dielectric properties of (1 − x)BNT-xBT (abbreviated as BNBT) ceramics were improved by using additives as CeO 2 [18], Ga 2 O 3 [19], Y 2 O 3 [20], La 2 O 3 [21], YMnO 3 [22] and BaTiO 3 -doped (Bi 0.5 Na 0.5 )TiO 3 [23].…”

Section: Introductionmentioning

confidence: 99%

Ferroelectric relaxor behavior and dielectric spectroscopic study of 0.99(Bi0.5Na0.5TiO3)–0.01(SrNb2O6) solid solution

Singh¹,

Bajpai²

2011

Journal of Alloys and Compounds

View full text Add to dashboard Cite

Effect of Ba2+ in BNT ceramics on dielectric and conductivity properties

Abstract: ABSTRACT

Cited by 20 publications

References 44 publications

Structure and electrical properties of lead-free Bi_0.5Na_0.5TiO₃-based ceramics for energy-storage applications

Structure and electrical properties of lead-free Bi_0.5Na_0.5TiO₃-based ceramics for energy-storage applications

Structure and electrical properties of (Bi,Na)0.94Ba0.06Ti1-x(Mg1/3Nb2/3)xO3 ceramics

Ferroelectric relaxor behavior and dielectric spectroscopic study of 0.99(Bi0.5Na0.5TiO3)–0.01(SrNb2O6) solid solution

Contact Info

Product

Resources

About

Effect of Ba2+ in BNT ceramics on dielectric and conductivity properties

Abstract: ABSTRACT

Cited by 20 publications

References 44 publications

Structure and electrical properties of lead-free Bi0.5Na0.5TiO3-based ceramics for energy-storage applications

Structure and electrical properties of lead-free Bi0.5Na0.5TiO3-based ceramics for energy-storage applications

Structure and electrical properties of (Bi,Na)0.94Ba0.06Ti1-x(Mg1/3Nb2/3)xO3 ceramics

Ferroelectric relaxor behavior and dielectric spectroscopic study of 0.99(Bi0.5Na0.5TiO3)–0.01(SrNb2O6) solid solution

Contact Info

Product

Resources

About

Structure and electrical properties of lead-free Bi_0.5Na_0.5TiO₃-based ceramics for energy-storage applications

Structure and electrical properties of lead-free Bi_0.5Na_0.5TiO₃-based ceramics for energy-storage applications