Search Results - "Karaki, Tomoaki"

Recent progress on AC poling of relaxor-PbTiO3 ferroelectric single crystals: a review by Sun, Yiqin, Karaki, Tomoaki, Yamashita, Yohachi

“…Compared to conventional DC poling (DCP) treatment, in 2014 a novel technology, AC poling (ACP) treatment, was found to be a low-cost, time-saving and…”
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Effect of MnO2 addition on temperature-dependent properties of tetragonal (Bi,Na)TiO3–BaTiO3 thick films prepared on MgO ceramic substrates by Sakai, Yuichi, Karaki, Tomoaki

“…The temperature-dependent properties of the (1–x)(Bi0.5Na0.5)TiO3–xBaTiO3 (BNT–100xBT, 0.14 ≤ x ≤ 0.40) thick films with MnO2 additives were investigated. The…”
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Research on shear stress of electrorheological fluid containing piezoelectric powders by Koyanagi, Ken’ichi, Wang, Xu, Karaki, Tomoaki

“…This paper describes experimental trials that were performed to increase the electrorheological (ER) effect in ER fluids (ERFs) by introducing piezoelectric…”
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Dielectric and piezoelectric properties of Pb[(Mg1/3Nb2/3)0.52(Yb1/2Nb1/2)0.15Ti0.33]O3 single-crystal rectangular plate and beam mode transducers poled by alternate current poling by He, Chao, Karaki, Tomoaki, Yang, Xiaoming, Yamashita, Yohachi (John), Sun, Yiqin, Long, Xifa

“…The dielectric, piezoelectric and physical properties of the [001]-oriented rectangular plate and beam mode of Pb[(Mg1/3Nb2/3)0.52(Yb1/2Nb1/2)0.15Ti0.33]O3…”
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Effect of field cooling AC poling on electrical and physical properties for Pb(Mg1/3Nb2/3)O3-PbTiO3-based single crystals manufactured by a continuous-feeding Bridgman process by Luo, Cong, Karaki, Tomoaki, Sun, Yiqin, Yamashita, Yohachi (John), Xu, Jiayue

“…We have designed and fabricated a compact, 250 cm3 electric field cooling alternate current poling (FC ACP) system and obtained an enhanced dielectric…”
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Effect of substrate thermal expansion coefficients on the properties of (Bi,Na)TiO3-BaTiO3 thick films around the morphotropic phase boundary by Sakai, Yuichi, Karaki, Tomoaki

“…Lead-free (1-x)(Bi0.5Na0.5)TiO3-xBaTiO3 (abbreviated as BNT-100xBT) thick films around the morphotropic phase boundary composition (0.03 ≤ x ≤ 0.09) were…”
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Irreversible domain evolutions and formation mechanism of relaxor ferroelectric 0.91PZN-0.09PT single crystals by Xu, Jiayue, Luo, Cong, Li, Xuxiang, Qian, Jun, Shen, Hui, Tian, Tian, Liu, Wenbin, Karaki, Tomoaki, Ma, Yunfeng

“…Relaxor-based ferroelectric PZN-PT crystals are well known with excellent piezoelectric properties. However, the inhomogeneity has been usually observed in…”
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Effect of La(Nb1/3Mg2/3)O3 addition on phase transition behavior and energy storage properties of NaNbO3 ceramics by Zhang, Tao, Karaki, Tomoaki, Fujii, Tadashi

“…The doped NaNbO3 ceramics of (1−x)NaNbO3–xLa(Nb1/3Mg2/3)O3 were prepared by conventional solid state method, and then the dielectric, phase transition and…”
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High piezoelectricity after field cooling AC poling in temperature stable ternary single crystals manufactured by continuous-feeding Bridgman method by Luo, Cong, Karaki, Tomoaki, Wang, Zhuangkai, Sun, Yiqin, Yamashita, Yohachi (John), Xu, Jiayue

“…After field cooling (FC) alternating current poling (ACP), we investigated the dielectric and piezoelectric properties of [001] pc -oriented 0.24Pb(In 1/2 Nb…”
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High temperature and low voltage AC poling for 0.24Pb(In1/2Nb1/2)O3-0.46Pb(Mg1/3Nb2/3)O3-0.30PbTiO3 piezoelectric single crystals manufactured by continuous-feeding Bridgman method by Cong Luo, Tomoaki Karaki, Yohachi (John) Yamashita, Jiayue Xu

“…Alternating current poling (ACP) in air by changing poling temperature (70–130 °C) and voltages (2–6 kVrms/cm) on pseudo-ternary…”
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Effect of substrate material to the properties of screen-printed lead free (Bi0.5Na0.5)TiO3-based thick films by Liu, Liqiang, Karaki, Tomoaki, Fujii, Tadashi, Sakai, Yuichi

“…Lead-free piezoelectric 0.83(Bi0.5Na0.5)TiO3-0.17BaTiO3 (BNT-17BT) thick films were grown on MgO ceramic substrates via screen printing. Thick films with…”
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Review of the applications of 3D printing technology in the field of piezoelectric ceramics by Sun, Dawei, Lu, Yao, Karaki, Tomoaki

“…•The main types of 3D printing technology in piezoelectric ceramic manufacturing are introduced.•Each 3D printing technology is described in detail from…”
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Dielectric, piezoelectric, and spurious mode vibration properties by four types of waveforms AC poling for Pb(Mg1/3Nb2/3)O3-PbTiO3 single crystals by Sun, Yiqin, Karaki, Tomoaki, Wang, Zhuangkai, Fujii, Tadashi, Yamashita, Yohachi

“…Four types of waveforms of AC poling (ACP) and DC poling (DCP) were applied on [001]-oriented 0.72Pb(Mg1/3Nb2/3)O3-0.28PbTiO3 (PMN-28PT) ferroelectric single…”
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Effects of annealing on the optical and scintillation properties of reddish Bi4Ge3O12 single crystals by Yuan, Lanying, Ni, Haihong, Chen, Junfeng, Song, Guilan, Qi, Xuejun, Li, Xiang, Karaki, Tomoaki, Wang, Dong

“…Large-size and -scale bismuth germanate (Bi4Ge3O12, BGO) crystals were grown in an oxidizing atmosphere using the modified Bridgman method. Although the growth…”
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Barium Titanate Piezoelectric Ceramics Manufactured by Two-Step Sintering by Karaki, Tomoaki, Yan, Kang, Adachi, Masatoshi

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Two-step Synthesis of Platelike Potassium Sodium Niobate Template Particles by Hydrothermal Method by Bai, Shan, Karaki, Tomoaki

“…Two‐step hydrothermal synthesis of platelike potassium sodium niobate (K, Na)NbO3 (KNN) template particles was investigated. Platelike K4Na4Nb6O19·9H2O…”
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A Review on Alternating Current Poling for Perovskite Relaxor-PbTiO3 Single Crystals by Kim, Hwang-Pill, Wan, Haotian, Luo, Chengtao, Sun, Yiqin, Yamashita, Yohachi, Karaki, Tomoaki, Lee, Ho-Yong, Jiang, Xiaoning

“…With the great success on verifying its effectiveness on relaxor-PbTiO3 (PT) single crystals (SCs), alternating current poling (ACP) has been taking a center…”
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Leakage electric field in longitudinal vibration from piezoelectric bars by Karaki, Tomoaki, Man, Zhenyong, Xiong, Kainan, Chu, Ruiqing, Li, Guorong

“…The edge effects due to leakage electric fields in piezoelectric bar specimens cause non-uniform charge densities, distort electric field lines, and increase…”
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Morphology control and phase transition of hexagonal sodium niobate particles by Lu, Yao, Karaki, Tomoaki, Fujii, Tadashi, Ido, Yoshiaki, Li, Yongxiang, Sakai, Yuichi

“…Hexagonal NaNbO3 particles with an ilmenite structure and plate-like morphology were synthesized by a hydrothermal method. The morphological evolution of the…”
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Effects of NiO addition on (K,Na,Li)NbO3-BaZrO3-(Bi,Na)TiO3-based ceramics by Sakai, Yuichi, Futakuchi, Tomoaki, Karaki, Tomoaki, Adachi, Masatoshi

“…The effects of CuO or NiO addition on the sintering temperature and electrical properties of 0.92(K0.47Na0.47Li0.06)NbO3-0.07BaZrO3-0.01(Bi0.5Na0.5)TiO3…”
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