Journal of Electroceramics

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Fabrication and properties of 1–3 connectivity epoxy resin modified cement based piezoelectric composite
Journal of Electroceramics - Tập 48 - Trang 67-73 - 2021
Yan Hu, Haoran Li, Peng Liu, Dongyu Xu
The 1–3 connectivity epoxy resin modified cement based piezoelectric composites were developed to meet the requirement of concrete structural heath monitoring. The piezoelectric ceramic volume fraction on piezoelectric, dielectric and electromechanical coupling properties of the composites were discussed. The results showed that the relative permittivity of the piezoelectric composites increases l...... hiện toàn bộ
Research on voltage sensitivity of vibration accelerometer based on cymbal transducer
Journal of Electroceramics - Tập 21 - Trang 770-773 - 2007
Wang Lina, Li Denghua, Jia Meijuan, Ju Weijun
The cymbal piezocomposite transducer was used as the sensitive element of a new type of vibration accelerometer. In this paper voltage sensitivity, S v, of the accelerometer was researched. Voltage sensitivity, S v, as a function of operation frequency, f, and voltage sensitivity as a function of preinstalled mass, M, was analyzed. The dimensions of ...... hiện toàn bộ
Effects of rapid thermal annealing on surface acoustic wave ultraviolet sensors using ZnO nanorods grown on AlN/Si structures
Journal of Electroceramics - Tập 30 - Trang 185-190 - 2013
Duy-Thach Phan, Gwiy-Sang Chung
In this study, we demonstrate a high sensitivity of surface acoustic wave (SAW) ultraviolet (UV) sensor based on ZnO nanorods (NRs) grown on an aluminum nitride (AlN)/silicon (Si) layered structure. The one-dimensional ZnO NRs act as a high-UV sensing material due to their large surface-to-volume ratio. The fabrication of SAW UV sensor is entirely compatible with micro/nano electromechanical (M/NE...... hiện toàn bộ
Tunable Dielectric Characteristics of 0.9Pb(Fe1/2Nb1/2)O3/0.1CaTiO3
Journal of Electroceramics - Tập 15 - Trang 223-227 - 2005
X. Hu, X. M. Chen, T. Wang
Tunable dielectric characteristics of 0.9Pb(Fe1/2Nb1/2)O3/0.1CaTiO3 relaxor ferroelectric ceramics were investigated as the function of DC bias field and temperature. High tunability (more than 20%) was obtained in the present ceramics under a relatively weak DC bias field (1.4 kV/cm). The value of tunability changed from negative to positive with increasing DC field. For the simulation of the die...... hiện toàn bộ
The performance and negative bias illumination stability of Hf-In-Zn-O thin film transistors on sputtering conditions
Journal of Electroceramics - - 2013
Hyun-Suk Kim, Jin-Seong Park
This study examined the performance and stability of amorphous Hf-In-Zn-O (a-HIZO) thin film transistors (TFTs) with different sputtering conditions (DC and RF) for the active layer. The field-effect mobility and stability under negative bias illumination stress for the DC device significantly improved to 13.7 cm2/Vs and −1.5 V shift of threshold voltage, respectively, compared to those (2.4 cm2/V...... hiện toàn bộ
An investigation of thick PZT films for sensor applications: A case study with different electrode materials
Journal of Electroceramics - Tập 23 - Trang 1-5 - 2008
Darko Belavič, Marko Hrovat, Marina Santo Zarnik, Janez Holc, Marija Kosec
Lead zirconate titanate (PZT) is a piezoelectric material that can sense or respond to mechanical deformations and can be used in ceramic micro-electro-mechanical systems (C-MEMS). A thick-film paste was prepared from a pre-reacted PZT powder (PbZr0.53Ti0.47O3) and thick-film technology (screen-printing and firing) was used to deposit the PZT layers on LTCC tapes and on alumina substrates. The mic...... hiện toàn bộ
Phase transition behavior and electrical properties of lead-free (1-x)KNLNS-xBNKZ piezoelectric ceramics
Journal of Electroceramics - Tập 46 - Trang 107-114 - 2021
Phan Dinh Gio, Le Dai Vuong, Vo ThanhTung
Lead-free (1-x)(K0,48Na0,48Li0,04)(Nb0,95Sb0,05)O3-xBi0.5(Na0.82K0.18)0.5ZrO3 (KNLNS-xBNKZ) piezoelectric ceramics (x = 0, 0.02, 0.04, 0.06, 0.08, and 0.1) were successfully prepared by the two-step sintering method. The effects of different BNKZ contents on the crystal structure, ferroelectric phase transition, and electrical properties of the as-prepared ceramics were systematically researched. ...... hiện toàn bộ
Determination of optical band gap of ZnO:ZnAl2O4 composite semiconductor nanopowder materials by optical reflectance method
Journal of Electroceramics - Tập 31 - Trang 265-270 - 2013
C. Aydın, M. Benhaliliba, Ahmed A. Al-Ghamdi, Zarah H. Gafer, Farid El-Tantawy, F. Yakuphanoglu
ZnO:ZnAl2O4 composite semiconductor nanopowder materials were synthesized by sol gel method. X-ray diffraction results reveal that Al doped ZnO samples have a polycrystalline hexagonal structure with a = 3.2506 Å, c = 5.2079 Å lattice parameters. The crystallite size of the ZnO samples is decreased with increasing Al content. Atomic force microscope results indicate the presence of micro/nanohexag...... hiện toàn bộ
Physical properties of transparent conducting indium doped zinc oxide thin films deposited by pulsed DC magnetron sputtering
Journal of Electroceramics - Tập 23 Số 2-4 - Trang 536-541 - 2009
Young Ran Park, Donggeun Jung, Ki-Chul Kim, Sunghwan Suh, Tae Seok Park, Young Sung Kim
Ultrasonic transducer based on highly textured PMN-PT piezoelectric ceramic
Journal of Electroceramics - Tập 19 - Trang 375-381 - 2007
F. Levassort, M. Pham Thi, P. Marechal, L. -P. Tran-Huu-Hue, M. Lethiecq
A successful fabrication process of textured ceramics by homo-template grain growth (HTGG) is described. Two samples fabricated with this technique were characterised. Functional properties obtained are competitive with for example a thickness coupling factor over 50%. Different characteristics were compared with those obtained by a unit cell model previously developed for piezocomposites and exte...... hiện toàn bộ
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