Structural and dielectric properties of ferroelectric Sr4R2Ti4Nb6O30(R = Sm and Nd) ceramics

Zhang, H.; Fang, Liang; Huang, Tongcheng; Liu, H. X.; Yuan, Ran; Dronskowski, Richard

doi:10.1007/s10853-005-6121-3

Cited by 11 publications

(7 citation statements)

References 12 publications

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“…The T of Ba 4 SrRTi 3 V 7 O 30 (R=Sm and Dy) decreases as the ionic radius of the R ion decreases, and these results agree well with the results of other compounds of the same family [25,26]. This anomaly may be associated with ferroelectric-paraelectric phase transition, which was confirmed by the appearance of hysteresis loops (as shown in the later section).…”

Section: Dielectric Studysupporting

confidence: 88%

See 1 more Smart Citation

Structural, dielectric, electrical and piezoelectric properties of Ba4SrRTi3V7O30 (R=Sm, Dy) ceramics

Sahoo¹,

Panigrahi²,

Patri³

et al. 2008

Open Physics

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Abstract:Polycrystalline samples of Ba 4 SrRTi 3 V 7 O 30 (R=Sm and Dy), members of the tungsten-bronze family, were prepared using a high-temperature, solid-state reaction technique and studied their electrical properties (using complex impedance spectroscopy) in a wide range of temperature (31-500 • C) and frequency (1 kHz -1 MHz). Preliminary structural (XRD) analyses of these compounds show the formation of single-phase, orthorhombic structures at room temperature. The scanning electron micrographs (SEM) provided information on the quality of the samples and uniform distribution of grains over the entire surface of the samples. Detailed studies of the dielectric properties suggest that they have undergone ferroelectric-paraelectric phase transition well above the room temperatures (i.e., 432 and 355 • C for R= Sm and Dy, respectively, at frequency 100 kHz). Measurements of electrical conductivity (ac and dc) as a function of temperature suggest that the compounds have semiconducting properties much above the room temperature, with negative temperature coefficient of resistance (NTCR) behavior. The existence of ferroelectricity in these compounds was confirmed from a polarization study.

show abstract

Section: Dielectric Studysupporting

confidence: 88%

“…Recently, owing to the rapid progress in microwave telecommunications, satellite broadcasting, and other related technologies, a number of Ba based TB compounds with dielectric constant nearly 100 have attracted much attention because of their importance in the miniaturization of microelectronic devices [6][7][8][9][10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Structural, dielectric, electrical and piezoelectric properties of Ba4SrRTi3V7O30 (R=Sm, Dy) ceramics

Sahoo¹,

Panigrahi²,

Patri³

et al. 2008

Open Physics

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show abstract

“…Recently, Sebastian et al proposed some promising compounds with tungsten bronze (TB) structure and general formula Ba 3 (RE) 3 Ti 5 Nb 5 O 30 (RE=La, Y, Sm, Nd) to yield high dielectric constants of more than 130 [6,7] . Fang [8][9][10][11][12][13][14][15][16][17] .…”

Section: Introductionmentioning

confidence: 99%

High dielectric constant and low-loss dielectric ceramics of Sr5LnTi3Ta7O30 (Ln=La, Nd, Sm and Y)

Chen

Peng

et al. 2008

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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Polycrystalline Sr 5 LnTi 3 Ta 7 O 30 (Ln=La, Nd, Sm and Y) ceramics were prepared as singlephase materials through conventional solid-state ceramics method. The structure was characterized by X-ray diffraction method and scanning electron microscopy (SEM). The dielectric properties were measured from room temperature to 400 . All compounds are paraelectric phases adopting the filled tetragonal tungsten bronze (TB) structure at room temperature. At 1 MHz their dielectric constant ( r ) varied from 109 to 139, dielectric loss changed from 0.003 3 to 0.005 8, and the temperature coeffi cients of the dielectric constant ( ) moved from 710 to 880×10 6 1 .

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“…It has been found that different ionic substitutions at above-mentioned sites can play an important role in tailoring their physical properties [11,12]. Therefore, we conducted the systematic studies on the characterization and dielectric properties of Sr-based TB ceramics Sr 5 LnTi 3 Ta 7 O 30 and Sr 4 Ln 2 Ti 4 Ta 6 O 30 , Sn-contained ceramics A 5 LnSn 3 Nb 7 O 30 (A = Ba and Sr), and Zn-contained TB ceramics Ba 5 LnZnM 9 O 30 (M = Ta and Nb) [12][13][14][15][16][17][18][19][20][21]. Since very little data are available on Ni-contained TB compounds, this paper firstly presents the preparation, characterization and dielectric properties of new TB compounds Ba 5 LnNiNb 9 O 30 (Ln = La, Nd and Sm).…”

Section: Introductionmentioning

confidence: 99%

High permittivity and low loss dielectric ceramics Ba5LnNiNb9O30 (Ln=La, Nd and Sm)

Fang

Meng

2007

Journal of Alloys and Compounds

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Structural and dielectric properties of ferroelectric Sr4R2Ti4Nb6O30(R = Sm and Nd) ceramics

Cited by 11 publications

References 12 publications

Structural, dielectric, electrical and piezoelectric properties of Ba4SrRTi3V7O30 (R=Sm, Dy) ceramics

Structural, dielectric, electrical and piezoelectric properties of Ba4SrRTi3V7O30 (R=Sm, Dy) ceramics

High dielectric constant and low-loss dielectric ceramics of Sr5LnTi3Ta7O30 (Ln=La, Nd, Sm and Y)

High permittivity and low loss dielectric ceramics Ba5LnNiNb9O30 (Ln=La, Nd and Sm)

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