scholarly journals Observation of high dielectric properties of Mg-substituted BST ceramic synthesized by conventional solid-state route

2021 ◽  
Author(s):  
Vidushi Karol ◽  
Chandra Prakash ◽  
Anshu Sharma
Keyword(s):  
Dielectric Properties ◽  
Solid State ◽  
Solid State Route ◽  
High Dielectric ◽  
Conventional Solid State Route

scholarly journals Observation of High Dielectric Properties of Mg Substituted BST Ceramic Synthesized by Conventional Solid State Route

2021 ◽  
Author(s):  
Anshu Sharma ◽  
Vidushi Karol ◽  
Chandra Prakash
Keyword(s):  
Dielectric Properties ◽  
Solid State ◽  
Strontium Titanate ◽  
Barium Strontium Titanate ◽  
X Ray Diffraction ◽  
Conventional Solid State Reaction ◽  
Solid State Route ◽  
Barium Strontium ◽  
High Dielectric ◽  
Mg Content

Abstract Barium Strontium Titanate exhibits ferroelectric or paraelectric behaviour that depends upon the composition and other factors, making it suitable for a number of applications. We have adopted conventional solid state reaction route to synthesize magnesium substituted barium strontium titanate with low concentration of Mg (Mg= 0.005, 0.010 and 0.015). X-ray diffraction has confirmed the perovskite cubic single phase. The dielectric studies were carried out as a function of temperature at different fixed frequencies (1kHz, 10kHz, 50kHz and 100kHz) and as a function of frequency at room temperature. The Curie’s temperature of pure BST was 96°C and for Mg substituted BST samples it dropped from 85°C to 63°C. The dielectric permittivity firstly suppressed and then maximum value observed for Mg content 0.015 and dielectric loss is also less than one. The remanance (Pr) and coercivity (Ec) are obtained and analysed for ceramics samples. Improvement in dielectric properties due to substitution of Magnesium is observed.

Low-Fire Processing (1-x)Mg0.95Co0.05TiO3 - xCa0.6La0.8/3TiO3 Microwave Dielectric Ceramics

2014 ◽  
Vol 664 ◽  
pp. 14-17
Author(s):  
Chun Hsu Shen ◽  
Chung Long Pan ◽  
Shin Hung Lin ◽  
Wei Cheng Lin ◽  
Sheng Kai Huang
Keyword(s):  
Dielectric Properties ◽  
Solid State ◽  
Liquid Phase ◽  
Microwave Dielectric Properties ◽  
Microwave Dielectric Ceramics ◽  
Phase Effect ◽  
Solid State Route ◽  
Microwave Dielectric ◽  
Dielectric Ceramics ◽  
Conventional Solid State Route

The effects of 3Z2B addition on the microwave dielectric properties and the microstructures of (1-x)(Mg0.95Co0.05)TiO3-xCa0.6La0.8/3TiO3ceramics prepared with conventional solid-state route have been investigated. Doping with 3Z2B can effectively promote the densification and the microwave dielectric properties of (1-x)(Mg0.95Co0.05)TiO3-xCa0.6La0.8/3TiO3ceramics. It was found that (1-x)(Mg0.95Co0.05)TiO3-xCa0.6La0.8/3TiO3ceramics can be sintered at 1150°C due to the liquid phase effect of 3Z2B additions observed by SEM. TheQ×fvalue of (1-x)(Mg0.95Co0.05)TiO3-xCa0.6La0.8/3TiO3ceramics decreased with increasing 3Z2B content. At 1150°C, 0.9(Mg0.95Co0.05)TiO3-0.1Ca0.6La0.8/3TiO3ceramics with 1.0wt% 3Z2B addition possesses a εrvalue of 22.6, a Qfvalue of 49,000 (GHz) and a τfvalue of-10.7 ppm/°C.

Effect of Sintering Behaviors on Microwave Dielectric Properties of (Ca0.3Sr0.1)Sm0.4TiO3 Ceramics

2014 ◽  
Vol 602-603 ◽  
pp. 738-741
Author(s):  
Cheng Hsing Hsu ◽  
Shang Hung Tsai ◽  
Wen Shiush Chen ◽  
Chun Hung Lai ◽  
Jenn Sen Lin
Keyword(s):  
Dielectric Properties ◽  
Solid State ◽  
Microwave Dielectric Properties ◽  
X Ray Diffraction ◽  
X Ray ◽  
Solid State Route ◽  
Microwave Dielectric ◽  
Sintering Conditions ◽  
Diffraction Patterns ◽  
Conventional Solid State Route

The microstructure and dielectric properties of the (Ca0.3Sr0.1)Sm0.4TiO3 ceramics with various sintering conditions have been investigated. The compounds were prepared by the conventional solid-state route with various sintering temperatures from 1340 to 1400°C and sintering duration from 3 h. The resultant microwave dielectric properties were analyzed based upon the densification, the X-ray diffraction patterns and the microstructures of the ceramics. The correlation between the microstructures, the microwave dielectric properties and sintering behaviors was also examined. The εr value of 96.7 and Q×f value of 11,600 GHz were obtained for (Ca0.3Sr0.1)Sm0.4TiO3 ceramics sintering at 1370°C for 3 h. The (Ca0.3Sr0.1)Sm0.4TiO3 ceramics had suitable dielectric properties can find applications in microwave devices such as resonator, filter and antenna.

Dielectric and Magnetic Properties of BaTiO3/NiFe2O4 Composites

2007 ◽  
Vol 336-338 ◽  
pp. 377-380 ◽  
Author(s):  
Jian Hong Shen ◽  
Ji Zhou ◽  
Xue Min Cui ◽  
Yue Hui Wang
Keyword(s):  
Dielectric Constant ◽  
Magnetic Properties ◽  
Solid State ◽  
Spinel Structure ◽  
Initial Permeability ◽  
Solid State Route ◽  
Permittivity And Permeability ◽  
Xrd Studies ◽  
Two Phases ◽  
Conventional Solid State Route

A series of ferrroelectric-ferromagnetic composites were synthesized from BaTiO3 and NiFe2O4 ferrite by conventional solid-state route. XRD studies indicated that the composites comprised of only two phases, BaTiO3 phase with perovskite structure and NiFe2O4 phase with spinel structure. Frequency dependence of permittivity and permeability were also measured. Experimental results showed that the dielectric constant and initial permeability of these composites could be tunable by varying the composition of composites. Thus, these composites can be used for multilayer chips EMI filters.

A New Dielectric Material System of xLa(Mg1/2Ti1/2) O3−(1−X) CaTiO3 at Microvave Frequency

2003 ◽  
Vol 783 ◽  
Author(s):  
Yuan-Bin Chen ◽  
Cheng-Liang Huang ◽  
Che-Win Row
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Dielectric Material ◽  
Material System ◽  
Scanning Electronic Microscopy ◽  
Electronic Microscopy ◽  
Phase Effect ◽  
Temperature Coefficients ◽  
Solid State Route ◽  
Conventional Solid State Route

ABSTRACTThe dielectric properties and the microstructures of xLa(Mg1/2Ti1/2)O3−(1−x)CaTiO3 ceramics with B2O3 additions (0.25wt%) prepared with conventional solid-state route have been investigated. Doping with B2O3 (0.25wt%) can effectively promote the densification and the dielectric properties of xLa(Mg1/2Ti1/2)O3−(1−x)CaTiO3 ceramics. It is found that xLa(Mg1/2Ti1/2)O3−(1−x)CaTiO3 ceramics can be sintered at 1400°C due to the liquid phase effect of B2O3 addition observed by Scanning Electronic Microscopy. At 1425°C, 0.5La(Mg1/2Ti1/2)O3−0.5CaTiO3 ceramics with 0.25 wt% B2O3 addition possesses a dielectric constant (εr) of 43, a Q×f value of 24470 (at 8GHz) and a temperature coefficients of resonant frequency (τf) of -8.94 ppm/°C. As an increasing the content of La(Mg1/2Ti1/2)O3, the highest Q×f value of 30824(GHz) could be achieved for X=0.7.

Effect of sintering on the dielectric properties of 0.5BaTiO3–0.5Bi2/3Cu3Ti4O12 nanocomposite synthesized by solid state route

2016 ◽  
Vol 28 (7) ◽  
pp. 5523-5530 ◽  
Author(s):  
Ankur Khare ◽  
Shiva Sundar Yadava ◽  
Pooja Gautam ◽  
N. K. Mukhopadhyay ◽  
K. D. Mandal
Keyword(s):  
Dielectric Properties ◽  
Solid State ◽  
Solid State Route

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.

The Effects of Sintering Temperature on the Dielectric Properties of Sr(FeNb)0.5O3 Doped with Ba(Zr0.25Ti0.75)O3

2016 ◽  
Vol 675-676 ◽  
pp. 651-654
Author(s):  
Lalita Tawee ◽  
Kachaporn Sanjoom ◽  
Thanatep Phatungthane ◽  
Tawee Tunkasiri ◽  
Gobwute Rujijanagul ◽  
...  
Keyword(s):  
Grain Size ◽  
Dielectric Properties ◽  
Solid State ◽  
Wide Temperature Range ◽  
Solid State Reaction ◽  
Sintering Temperature ◽  
Dielectric Constants ◽  
Solid State Reaction Technique ◽  
Cubic Symmetry ◽  
High Dielectric

In this work, ceramics of Sr(Fe0.5Nb0.5O3) doped with Ba(Zr0.25Ti0.75)O3 (10 mol%), were synthesized by a solid-state reaction technique. The powders were calcined at 1300 °C for 12 hr and then sintered at 1400-1500 °C for 4 hr. Effects of sintering temperature on the properties of the ceramic were studied. Phase formation, microstructure, and dielectric properties were investigated. The ceramics exhibited a perovskite structure with cubic symmetry. Grain size of the ceramics increased with increasing the sintering temperature. The ceramics exhibited a dielectric relaxation like behavior with high dielectric constants over a wide temperature range

Crystallographic phases, phase transitions, and barrier layer formation in (1 − x) [Pb(Fe1/2Nb1/2)O3]−xPbTiO3

2003 ◽  
Vol 18 (11) ◽  
pp. 2677-2687 ◽  
Author(s):  
Satendra Pal Singh ◽  
Akhilesh Kumar Singh ◽  
Dhananjai Pandey ◽  
H. Sharma ◽  
Om Parkash
Keyword(s):  
Phase Transition ◽  
Phase Transitions ◽  
Solid State ◽  
Barrier Layer ◽  
Sintering Temperature ◽  
Complex Impedance ◽  
Relaxor Ferroelectric ◽  
Layer Formation ◽  
Solid State Route ◽  
Conventional Solid State Route

Powders of (1 − x) Pb(Fe1/2Nb1/2)O3-xPbTiO3 (PFN-PT) with x = 0.00, 0.10, 0.13, 0.15, 0.20, and 0.25 were prepared by the conventional solid-state route. Structure of PFN-PT was tetragonal for x [H33356] 0.10, which indicates that the morphotropic phase boundary (MPB) may be between 0 < x < 0.10. The nature of phase transition in PFN-PT changed from diffuse ferroelectric to relaxor ferroelectric to normal ferroelectric on increasing the PT content. The effect of the PT content and sintering temperature on barrier layer formation in the PFN-PT system was studied using complex impedance spectroscopy. With increasing PT content, the possibility of the barrier layer formation decreased while with increasing sintering temperature, the barrier layer formation was promoted.

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