Article
Materials Science, Ceramics
Zheng Sun, Wenxu Liu, Qiuyang Li, Zhi Tao, Yemei Han
Summary: Introducing Bi(Zn2/3Nb1/3)O-3 successfully improved the dielectric performance of (1-x) BZT20-xBZN composite ceramics, with sample 0.94BZT20-0.06BZN exhibiting enhanced dielectric constants and a higher degree of relaxor behavior (γ=1.91).
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Multidisciplinary
Kriti Batra, Nidhi Sinha, Binay Kumar
Summary: This study reports the influence of Nd-dopant on the structural, microstructural and di-/ferro-/piezo-electrical properties of lead-free binary piezoelectric perovskite system KNN-BNZ. Nd-doping resulted in reduced grain size and curie phase transition temperature, while enhancing the piezoelectric response and fatigue stability of the ceramic material.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2022)
Article
Chemistry, Physical
Khalid Mujasam Batoo, Ritesh Verma, Ankush Chauhan, Rajesh Kumar, Muhammad Hadi, Omar M. Aldossary, Y. Al-Douri
Summary: This study reported the synthesis of Gd and Nb co-doped BT ceramic oxides and investigated their structural and electrical properties. Various analysis techniques were used to characterize the samples, revealing the influence of Gd and Nb doping on the electrical properties of the ceramic materials, which were found to improve with increasing dopant concentration.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Inorganic & Nuclear
Najah Rhimi, N. Dhahri, M. Khelifi, E. K. Hlil, J. Dhahri
Summary: This work focuses on studying the properties of sodium bismuth titanate (NBT) ceramic, including its structure, optical properties, and electrical properties. The material exhibited a poly-crystalline structure with a rhombohedral shape, and a grain size of 29.17 μm. The dielectric loss and dielectric constant increased with frequency, and the conduction mechanism followed the correlated barrier hopping (CBH) and small polaron hopping (SPH) models. The study provides valuable insights into the physical characteristics of NBT and its potential applications in the industry.
INORGANIC CHEMISTRY COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
B. Srimathy, J. Kumar
Summary: Rare-earth Nd-doped lead zinc niobate-lead titanate (Nd:PZN-PT) and W-doped lead zinc niobate-lead titanate (W:PZN-PT) single crystals were grown by self-flux technique, with pure perovskite phases observed. The doped crystals showed enhanced relaxor behavior, as evidenced by diffuse phase transitions and frequency dispersive phenomena in the dielectric peaks. Additionally, doping had a significant impact on the dielectric constant, AC conductivity, and piezoelectric properties of the crystals, with a simple domain switching mechanism observed in the hysteresis behavior.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2021)
Article
Chemistry, Physical
Manish Badole, Hari Narayanan Vasavan, Samriddhi Saxena, Asish Kumar Das, Velaga Srihari, Sunil Kumar
Summary: The effects of La3+ and Al3+ substitution on the structural, dielectric, and piezo-electric properties of (1-x)(K0.5Bi0.5)TiO3-xLaAlO3 ceramics were investigated. With the increase in LAO content, a decrement in tetragonal distortion and an increase in cubic symmetry were observed. The incorporation of LAO in KBT resulted in an improved relaxor behavior and a suppression of oxygen vacancies. The piezo-electric properties were enhanced, with the 3% LAO-doped sample exhibiting the highest piezo-electric charge coefficient and improved piezo-electric voltage coefficient. An energy harvesting experiment was performed on the poled 3% LAO-doped ceramic, showing promising results under normal finger tapping.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
Pinki Yadav, Ankur Sharma, Himanshu Srivastava, Indranil Bhaumik, Gurvinderjit Singh, V. S. Tiwari
Summary: A correlation between piezoelectricity and photoluminescence in europium doped (Na0.41K0.09Bi0.5)TiO3 ceramic was investigated, showing an optimum response at 1.0 at.% Eu doping concentration. While photoluminescence intensity increased with Eu concentration, a quenching effect on the hypersensitive 5D0 -> 7F2 transition was observed under an electric field in samples with lower Eu doping concentration.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Ayush Raj, Prabhasini Gupta, R. N. P. Choudhary
Summary: The effect of lanthanum substitution on the structural and electrical characteristics of Ba (Fe0.5Nb0.5)O-3 has been investigated in different compositions. Lanthanum doping at x = 0.15 significantly enhances the dielectric and ferroelectric behavior of the material, reducing the loss tangent.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2021)
Article
Materials Science, Ceramics
Souhir Bouzidi, Najah Rhimi, Ahmed Dhahri, Afef Kallekh, Ch Rayssi, Fahad Abdulaziz, Amal H. Alsehli, Marwah M. Alsowayigh
Summary: The morphological, structural and electrical properties of chromium-doped BaTiO3 ceramics were investigated. BaTi0.5 (Cr0.33 Mo0.17)O3 was prepared by the sol-gel technique. The electrical conductivity graph is divided into two regions in the frequency interval 102-106 Hz over the temperature range 480-640 K. The complex impedance plot showed large semicircular arcs corresponding to the merging of two semicircles due to grain and grain boundary contribution.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
A. K. Thomas, Merin George, Kevin Abraham, D. Sajan
Summary: Polycrystalline SCTO ceramics exhibit tremendously high dielectric permittivity ε' at low frequencies, with two distinct, thermally triggered dielectric relaxations. The electrical and dielectric behaviors of SCTO ceramics are reasonably analogous to those of CCTO ceramics.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2021)
Article
Materials Science, Ceramics
Pengyu Yao, Yaping Deng, Bo Li
Summary: By doping borax, the sintering temperature of Sr-3(VO4)(2) ceramics was effectively reduced, microwave dielectric properties were improved, and optimal performance was achieved in this study.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Guoqiang He, Xinyue Ma, Yanjun Liu, Yinghan He, Yaqi Xiao, Xin Qu, Shan Deng, Kaiyang Liu, Xi Wang, Shicheng Zhou, Qing Li, Zhengli Dai, You Wu, Xiuli Chen, Huanfu Zhou
Summary: A SrY2O4 microwave dielectric ceramic suitable for 5G systems is synthesized via a solid-state reaction, showing excellent performance at the optimal sintering temperature and indicating to be a good choice for 5G equipment.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Ritesh Verma, Ankush Chauhan, Khalid Mujasam Batoo, Muhammad Hadi, Emad H. Raslan, Rajesh Kumar, Muhammad Farzik Ijaz, Abdulaziz K. Assaifan
Summary: The synthesis of vanadium-doped BCZT ceramic oxides was reported in this paper, confirming the existence of a solubility limit of V in BCZT ceramics. Analysis revealed the influence of crystal structure and formation of oxygen vacancies on the luminescence and electrical properties of the material.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Amine Bendahhou, Karim Chourti, Soufian El Barkany, Mohamed Abou-Salama
Summary: Ba-4(Nd1-xSmx)(28/3)(Ti0,95Zr0,05)(18)O-54 ceramics with varying Nd/Sm ratio were studied for their structure and dielectric behavior. The crystal structure was found to belong to the tungsten bronze type, with dense microstructure and significant temperature-dependent dielectric properties.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
V. Dolezal, V. Jakes, J. Petrasek, P. Ctibor, O. Jankovsky, K. Rubesova, D. Sedmidubsky
Summary: The perovskite-type phase CaCu3Ti4O12 has promising dielectric properties, but the phenomenon of giant permittivity in this material has not been fully explained. In this study, Europium with similar electronegativity and ionic radius as Calcium was tested as a partial or complete substitute. A series of materials, including CaCu3Ti4O12, Eu0.4Ca0.6Cu3Ti4O12, and EuCu3Ti4O12, were prepared using a sol-gel method and sintering. The influence of microstructure and phase composition on the dielectric properties of the samples, as well as the effect of sintering temperature, was investigated. Secondary phases and microstructure were found to play a significant role in improving the permittivity values, which were found to be giant at higher frequencies but significantly different for specific compositions.
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2023)
