Journal of Electroceramics

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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
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
Fabrication of three-dimensional electromagnetic band-gap structure with high-K dielectric ceramics by rapid-prototyping
Journal of Electroceramics - Tập 25 Số 2 - Trang 218-222 - 2010
Dai, Wei, Wang, Hong, Wang, Minjie, Shen, Zhiyuan, Li, Dichen, Zhou, Di, Shi, Jianzhang
Three-Dimensional diamond structure electromagnetic band-gap (EBG) structures containing high-K dielectric ceramic Bi(Nb0.992 V0.008)O4 (BVN) fabricated by rapid-prototyping (RP) technique were investigated. The simulations based on finite element method (FEM) were employed to model the band diagram. The influences of structure dimensions, aspect ratio and permittivity contrast on the band gap wid...... hiện toàn bộ
Selective growth of ZnO nanorods by patterning of sol-gel-derived thin film
Journal of Electroceramics - Tập 17 - Trang 455-459 - 2006
S. Joon Kwon, Jae-Hwan Park, Jae-Gwan Park
An effective method of fabricating micro and sub micro patterned zinc oxide nanorods without a transient metal catalytic assistants via hydrothermal synthesis using micro molding technique was presented. Micro molding of sol-gel-derived precursor layer was clearly accomplised by conformal contact of elastomeric molds with various kinds of patterns. The selective growth of the nanorods over a large...... hiện toàn bộ
Processing and Dielectric Properties of Sol-Gel Derived PMN-PT (68:32) Thin Films
Journal of Electroceramics - Tập 13 - Trang 503-507 - 2004
T. C. Goel, Pawan Kumar, A. R. James, Chandra Prakash
PMN-PT thin films near MPB were prepared using sol-gel technique. A transparent solution of the ceramic was prepared by using lead acetate trihydrate, magnesium ethoxide, niobium ethoxide and titanium isopropoxide as precursors along with 2methoxyethanol as solvent and acetic acid as catalyst. Thin films of the ceramic were prepared on Pt/Si and on ITO coated glass substrates. X-ray diffraction (X...... hiện toàn bộ
Electrochemical Removal of NO x by Scandium Doped Zirconia Membrane Reactor with Ceria Buffer Layer
Journal of Electroceramics - Tập 13 - Trang 727-732 - 2004
Hae Jin Hwang, Ji-woong Moon, Masanobu Awano
We developed a multi-layered LSCF/GDC/ScSZ/GDC/LSCF membrane reactor for NO decomposition, and its electrochemical properties and NO decomposition behaviors were investigated. A GDC buffer layer was able to prevent the harmful interfacial reaction between LSCF and ScSZ, mainly, strontium zirconate, which was observed in LSCF/ScSZ/LSCF membrane reactor. As a result, the electrode polarization resis...... hiện toàn bộ
Improving bending strength of LTCC materials with low dielectric loss by structural design
Journal of Electroceramics - Tập 49 - Trang 109-114 - 2022
Huaizhi Wang, Yue Leng, Yaoyi Chen, Haiyi Peng, Haishen Ren, Tianyi Xie, Huixing Lin, Fancheng Meng
The flake alumina filler is added to improve the bending strength in BaZrO3 (BZ)/BaO-MgO-ZnO-SiO2-B2O3 (BBSMZ) glass for the application of low temperature co-fired ceramics. The effects of flake alumina filler for BaZrO3/BaO-MgO-ZnO-SiO2-B2O3 on phase, microstructure, dielectric and mechanical property are studied. With the increase of flake Al2O3 content, flake Al2O3 phase appears, BaZrO3, BaZr(...... hiện toàn bộ
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