Influence of Phase Composition on Dielectric Properties of Bismuth-Based Ceramics with Scheelite-Type Structure

2014 ◽  
Vol 602-603 ◽  
pp. 683-688
Author(s):  
Dionizy Czekaj ◽  
Agata Lisińska-Czekaj
Keyword(s):  
Phase Composition ◽  
Dielectric Properties ◽  
Solid State ◽  
Pressureless Sintering ◽  
Dielectric Losses ◽  
Frequency Range ◽  
Minor Phase ◽  
Reaction Route ◽  
Excess Amount ◽  
Solid State Reaction Route

Goal of the present research was to study dielectric properties of BiNbO4 ceramics fabricated by solid state reaction route followed with pressureless sintering. The samples were fabricated from the mixture of oxides, viz. Nb2O5 and Bi2O3. Apart from stoichiometric amount an excess of 3%, 5% and 10% by mole of Bi2O3 was used. It was found that an excess amount of Bi2O3 oxide caused formation of Bi5Nb3O15 minor phase in amount of 9wt%, 18wt% and 25wt%, respectively. The dielectric properties were studied by impedance spectroscopy within the frequency range ν=20Hz1MHz and temperature range T=RT550°C. It was found that the presence of the minor phase in amount of 18wt% caused a decrease in dielectric losses of the material under studies.

scholarly journals Effects of V2O5 Additive on Structure and Dielectric Properties of BiNbO4 Ceramics

2013 ◽  
Vol 58 (4) ◽  
pp. 1387-1390
Author(s):  
A. Lisińska-Czekaj ◽  
D. Czekaj ◽  
K. Osińska ◽  
M. Adamczyk
Keyword(s):  
Dielectric Properties ◽  
Complex Impedance ◽  
Pressureless Sintering ◽  
Relaxation Phenomena ◽  
Frequency Range ◽  
Reaction Route ◽  
X Ray ◽  
Dielectric Characterization ◽  
Frequency Domains ◽  
Solid State Reaction Route

Abstract Goal of the present research was to investigate the influence of V2O5 additive on the structure and dielectric properties of BiNbO4 ceramics. To fabricate BiNbO4 ceramics with V2O5 added the solid state reaction route and pressureless sintering was utilized. Thus obtained ceramics was characterized in terms of its microstructure (SEM), chemical composition (EDS), phase composition and crystalline structure (X-ray phase and structural analysis, respectively). Also dielectric properties in both temperature and frequency domains were investigated. The impedance spectroscopy was utilized for dielectric characterization and the measurements of complex impedance were performed within the frequency range ν =10Hz-1MHz and temperature range T =RT-550°C. It was found that V2O5 additive changed slightly lattice parameters of BiNbO4 ceramics, decreased porosity of samples and revealled relaxation phenomena within the frequency ranges ν =102-103 Hz and ν =105-106 Hz at temperature T>285°C.

Preparation and Dielectric Properties of Sm3+-Substituted SrBi8Ti7O27 Based Microwave Ceramics

2007 ◽  
Vol 280-283 ◽  
pp. 95-98
Author(s):  
Yan Xiang Wang ◽  
C. Fang ◽  
Min Tang ◽  
Hong Qiu ◽  
Zhao Xian Xiong
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Solid State ◽  
Solid State Reaction ◽  
High Dielectric Constant ◽  
Microwave Ceramics ◽  
Reaction Route ◽  
Solid State Reaction Route ◽  
Dta And Tg ◽  
High Dielectric

Sr(Bi1-xSmx)8Ti7O27 ceramics were prepared by Sm2O3-substitution for Bi2O3 through solid-state reaction route. The dielectric properties of the sintered bodies such as er, Q and tf were investigated. The ceramics were characterized by SEM, XRD, DTA and TG, which behaved high dielectric constant of 128 ~154 at the frequency of 10 GHz.

Influence of Ta substitution for Nb in Zn3Nb2O8 and the impact on the crystal structure and microwave dielectric properties

2016 ◽  
Vol 45 (29) ◽  
pp. 11807-11816 ◽  
Author(s):  
Yonggui Zhao ◽  
Ping Zhang
Keyword(s):  
Crystal Structure ◽  
Dielectric Properties ◽  
Solid State ◽  
Solid State Reaction ◽  
Structural Characteristics ◽  
Microwave Dielectric Properties ◽  
Reaction Route ◽  
Microwave Dielectric ◽  
Solid State Reaction Route ◽  
The Impact

Zn3(Nb1−xTax)2O8 (x = 0.02–0.10) ceramics were prepared via a solid-state reaction route and the dependence of their microwave dielectric properties on their structural characteristics were investigated.

Dielectric characteristics of Fe-doped LaTiO3+δ and visible light modulation

RSC Advances ◽  
2016 ◽  
Vol 6 (103) ◽  
pp. 101571-101577 ◽  
Author(s):  
Yan Chen ◽  
Yimin Cui ◽  
Jun-en Yao
Keyword(s):  
Dielectric Properties ◽  
Visible Light ◽  
Room Temperature ◽  
Light Modulation ◽  
Frequency Range ◽  
Reaction Route ◽  
Dielectric Characteristics ◽  
Ceramic Samples ◽  
Solid State Reaction Route ◽  
Measured Frequency Range

Fe-doped La1−xFexTiO3+δ (x = 0.05, 0.1, and 0.3, 0.4) ceramic samples were prepared via traditional solid-state reaction route, in which the dielectric properties of visible light modulation were found at room temperature in the measured frequency range.

scholarly journals Evidence of Finite Magneto-electric Coupling in SmFeO3 – PbTiO3 Solid Solutions

2021 ◽  
Author(s):  
Mehak Arora ◽  
Shubhpreet Kaur ◽  
Kanika aggarwal ◽  
Sunil Kumar ◽  
Parambir Singh Malhi ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Dielectric Properties ◽  
Solid State ◽  
Solid Solutions ◽  
Dielectric Response ◽  
Reaction Route ◽  
Multiferroic Properties ◽  
Electric Coupling ◽  
Maximum Value ◽  
Solid State Reaction Route

Abstract Present work investigates the detailed multiferroic properties of Pb1 − xSmxTi1−xFexO3, (x = 0.21, 0.22, 0.23, 0.24 and 0.25) synthesize through solid state reaction route. The structural, dielectric, ferroelectric and magnetic properties were measured. A sincere study is carried out to detect the magneto-electric coupling in all the samples through magneto-dielectric, magnetization after electric poling and magneto-pe response. The maximum value of coupling coefficient (γ) and magneto-dielectric response (MDR) of sample x = 0.24 has shown by magneto-dielectric properties and magnetization after electric poling whereas magneto-pe has shown that all the samples possess multiferroic nature.

EFFECT OF PROCESSING CONDITIONS ON ELECTRICAL PROPERTIES OF CaCu3Ti4O12 CERAMICS

2010 ◽  
Vol 24 (12) ◽  
pp. 1267-1273 ◽  
Author(s):  
RAMAN KASHYAP ◽  
TANUJ DHAWAN ◽  
PRIKSHIT GAUTAM ◽  
O. P. THAKUR ◽  
N. C. MEHRA ◽  
...  
Keyword(s):  
Solid State ◽  
Electrical Properties ◽  
Nonlinear Behavior ◽  
Ferroelectric Hysteresis Loop ◽  
Processing Conditions ◽  
Reaction Route ◽  
Sintering Time ◽  
Maximum Value ◽  
Solid State Reaction Route ◽  
Ferroelectric Hysteresis

CaCu 3 Ti 4 O 12 ( CCTO ) ceramics were prepared by the solid-state reaction route. Effect of sintering time was studied on the polarization (P) versus electric field (E) behavior. Unlike conventional ferroelectric hysteresis loop, PE hysteresis behavior in CCTO ceramics was observed to exhibit ferroelectric-like loop where polarization does not saturate but gives a maximum value. Remnant polarization and maximum polarization was observed to increase with sintering time. Current (I)–voltage (V) characteristics shows a nonlinear behavior making them useful for varistor applications. Coefficient of non-linearity (α) is also found to depend on sintering duration.

Promoted hydrogen release from ammonia borane with mannitolvia a solid-state reaction route

2012 ◽  
Vol 41 (3) ◽  
pp. 871-875 ◽  
Author(s):  
Yuede Pan ◽  
Yan Wang ◽  
Yanliang Liang ◽  
Zhanliang Tao ◽  
Jun Chen
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Ammonia Borane ◽  
Hydrogen Release ◽  
Reaction Route ◽  
Solid State Reaction Route
Sign in / Sign up

Export Citation Format

Share Document