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  • Influence of Microstructure on Fatigue Fracture Characteristics of Al2O3

    Kido Mitsuo , Katayama Gounozyo , Inoda Nana , Tsuchibushi Yasuyuki

    Fatigue fracture characteristics under static and cyclic loading were investigated for three kinds of Al2O3, with microstructures controlled by sintering additives (MgO, SiO2+CaO) and particle size. T …

    広島工業大学研究紀要 33, 67-74, 36192-00-00

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  • Improved Mechanical Properties of Al₂O₃ Ceramics by Sputtered TiN Coatings

    Chien Chia-Hui , Lai Feng-Min , Cheng Chih-Wen , Ou Sin-Liang , Liao Shu-Chuan , Su Tsan-Ming , Yang Yao-Tsung

    Materials transactions 58(10), 1392-1396, 2017-10

  • Effects of Ga substitution for Al and cation vacancy on microwave dielectric properties of spinel-structured Co

    Okazaki Hiroto , Takahashi Susumu , Kan Akinori , Ogawa Hirotaka

    … The microwave dielectric properties and cation distribution of spinel-structured Co<inf>1−3</inf><inf>z</inf>(Al<inf>1−</inf><inf>x</inf>Ga<inf>x</inf>)<inf>2+</inf><inf>z</inf>O<inf>4</inf>(z = 0–0.25) ceramics, where z represents the concentration of the cation vacancy, were characterized in this study. …

    Jpn. J. Appl. Phys. 56(10S), 10PE02, 2017-09-28

    応用物理学会

  • Development of new force sensor using super-multilayer alternating laminated film comprising piezoelectric poly(l-lactic acid) and poly(d-lactic acid) films in the shape of a rectangle with round corners

    Tajitsu Yoshiro , Adachi Yu , Nakatsuji Takahiro , Tamura Masataka , Sakamoto Kousei , Tone Takaaki , Imoto Kenji , Kato Atsuko , Yoshida Testuo

    … The piezoelectric rolls are also lighter than conventional piezoelectric ceramics and can be used as a novel pressure sensor. …

    Jpn. J. Appl. Phys. 56(10S), 10PG03, 2017-09-28

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  • Effect of atomic vacancies on ionic polarization of nonstoichiometric strontium titanate ceramics

    Sase Ryuichi , Hoshina Takuya , Takeda Hiroaki , Tsurumi Takaaki

    We prepared nonstoichiometric strontium titanate with different Sr/Ti atomic ratios and measured the THz dielectric spectra to discuss the effect of atomic vacancies on the ionic polarization. In the …

    Jpn. J. Appl. Phys. 56(10S), 10PB11, 2017-09-27

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  • Fabrication of 〈110〉 grain-oriented 0.15BaTiO

    Ueno Shintaro , Itou Ryo , Suzuki Tohru , Wada Satoshi , Fujii Ichiro

    … grain-oriented ceramics with the composition of 0.15BaTiO<inf>3</inf>–0.85(Bi<inf>0.5</inf>Na<inf>0.5</inf>)TiO<inf>3</inf>with a high Curie temperature of ∼300 °C were successfully fabricated by reactive templated grain growth of layered hydrogen titanate platelets with (Bi<inf>0.5</inf>Na<inf>0.5</inf>)TiO<inf>3</inf>and BaCO<inf>3</inf>matrix powders. …

    Jpn. J. Appl. Phys. 56(10S), 10PD06, 2017-09-27

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  • Material design of two-phase-coexisting niobate dielectrics by electrostatic adsorption

    Fuchigami Teruaki , Yoshida Katsuya , Kakimoto Ken-ichi

    … A material design process using electrostatic adsorption was proposed to synthesize composite ceramics with a two-phase-coexisting structure. … NKN–ST and NKN–BNN were well dispersed with no aggregate in NKN–ST/NKN–BNN ceramics synthesized using the supported particles in comparison with ceramics synthesized using a mixture obtained by simply mixing NKN–ST and NKN–BNN powder. …

    Jpn. J. Appl. Phys. 56(10S), 10PC08, 2017-09-26

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  • Quenching effects on piezoelectric properties and depolarization temperatures of (Bi

    Miura Tatsuki , Nagata Hajime , Takenaka Tadashi

    … Lead-free ferroelectric and piezoelectric ceramics, (Bi<inf>0.5</inf>Na<inf>0.5(1−</inf><inf>x</inf><inf>)</inf>Li<inf>0.5</inf><inf>x</inf>)TiO<inf>3</inf>and (1 − … The T<inf>d</inf>of all BNLT100x quenched from 1100 °C reached around 240 °C, and they are almost 60 °C higher for x = 0, 0.02, 0.04, and almost 80 °C higher for x = 0.08 than those of nonquenched ceramics. …

    Jpn. J. Appl. Phys. 56(10S), 10PD05, 2017-09-25

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  • Temperature dependences of the electromechanical and electrocaloric properties of Ba(Zr,Ti)O

    Maiwa Hiroshi

    … The electrocaloric properties of Ba(Zr,Ti)O<inf>3</inf>and (Ba,Sr)TiO<inf>3</inf>ceramics (BZT and BST, respectively) were investigated by the indirect estimation and direct measurement of temperature–electric field (T–E) hysteresis loops. …

    Jpn. J. Appl. Phys. 56(10S), 10PC05, 2017-09-25

    応用物理学会

  • Synthesis and piezoelectric properties of (1 − x)Bi

    Onishi Ryo , Ogawa Hirotaka , Iida Daiki , Kan Akinori

    … x)Bi<inf>0.5</inf>(Na<inf>0.8</inf>K<inf>0.2</inf>)<inf>0.5</inf>TiO<inf>3</inf>(BNKT)–xSZT ceramics were characterized in this study. … The X-ray powder diffraction (XRPD) profiles and Raman spectra of the ceramics in the composition range of 0–0.02 implies the presence of morphotropic phase boundary (MPB) which consists of the rhombohedral and tetragonal phases. …

    Jpn. J. Appl. Phys. 56(10S), 10PD04, 2017-09-22

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  • Local structure analysis of (Na

    Yoneda Yasuhiro , Takada Eri , Nagai Haruka , Kikuchi Takeyuki , Morishita Masao , Kobune Masafumi

    … A monoclinic ferroelectric phase with the space group Pm has been discovered in lead-free (Na<inf>0.5</inf>K<inf>0.45</inf>Li<inf>0.05</inf>)NbO<inf>3</inf>solid solution ceramics synthesized by a malic acid complex solution method. …

    Jpn. J. Appl. Phys. 56(10S), 10PB07, 2017-09-20

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  • Fabrication and electro-optic properties of 0.9Pb[(Mg,Zn)

    Fujii Ichiro , Nakashima Saki , Wada Takahiro

    … 0.9Pb[(Mg<inf>1−</inf><inf>x</inf>Zn<inf>x</inf>)<inf>1/3</inf>Nb<inf>2/3</inf>]O<inf>3</inf>–0.1PbTiO<inf>3</inf>(x = 0–0.4) ceramics were fabricated by a conventional sintering technique. … The ceramics became transparent at x = 0, 0.1, and 0.2, and the transmittances were 47, 43, and 53% at an infrared wavelength of 1310 nm, respectively. …

    Jpn. J. Appl. Phys. 56(10S), 10PC04, 2017-09-20

    応用物理学会

  • Novel low-temperature sintering ceramic substrate based on indialite/cordierite glass ceramics

    Varghese Jobin , Vahera Timo , Ohsato Hitoshi , Iwata Makoto , Jantunen Heli

    … In this paper, a novel low-temperature sintering substrate for low temperature co-fired ceramic applications based on indialite/cordierite glass ceramics with Bi<inf>2</inf>O<inf>3</inf>as a sintering aid showing low permittivity (ε<inf>r</inf>) and ultralow dielectric loss (tan δ) is described. …

    Jpn. J. Appl. Phys. 56(10S), 10PE01, 2017-09-20

    応用物理学会

  • Elution of lead from lead zirconate titanate ceramics to acid rain

    Tsurumi Takaaki , Takezawa Shuhei , Hoshina Takuya , Takeda Hiroaki

    … The amount of lead that eluted from lead zirconate titanate (PZT) ceramics to artificial acid rain was evaluated. … Four kinds of PZT ceramics, namely, pure PZT at MPB composition, CuO-added PZT, PZT with 10 mol % substitution of Ba for Pb, and CuO-added PZT with 10 mol % substitution of Ba for Pb, were used as samples of the elution test. …

    Jpn. J. Appl. Phys. 56(10S), 10PD01, 2017-09-19

    応用物理学会

  • Effect of thermal history on stability of the relaxor state in (Bi

    Hagiwara Manabu , Fujihara Shinobu

    … Here, we demonstrate that the thermal history of BKT ceramics has a great effect on the stability of the R and FE states. … To modulate the distribution of Bi<sup>3+</sup>and K<sup>+</sup>ions, as-sintered BKT ceramics were postannealed at 900 °C and then cooled to 500 °C at a very low cooling rate of −0.1 °C/min. The slowly cooled samples showed a normal-relaxor-like temperature dependence of dielectric permittivity without any anomaly attributed to the spontaneous R-FE transition. …

    Jpn. J. Appl. Phys. 56(10S), 10PC03, 2017-09-12

    応用物理学会

  • Enhancement of the dielectric permittivity of (Nb

    Taniguchi Hiroki , Ando Kako , Terasaki Ichiro

    … Dielectric measurements are performed on (Nb<inf>1/2</inf>In<inf>1/2</inf>)<inf>0.02</inf>Ti<inf>0.98</inf>O<inf>2</inf>(NITO-2.0) single crystals grown by a floating zone method to address the nature of the colossal permittivity recently reported in (Nb + In) co-doped TiO<inf>2</inf>ceramics. …

    Jpn. J. Appl. Phys. 56(10S), 10PC02, 2017-09-07

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  • Preparation of 0.83(Bi

    Sakai Yuichi , Karaki Tomoaki

    … The temperature dependence curves of the dielectric constants of the bulk ceramics and BNT–17BT/Al<inf>2</inf>O<inf>3</inf>showed a shoulder with frequency dispersion at approximately 200 °C, whereas this shoulder was not observed in the curves of the BNT–17BT/YSZ. … At temperatures higher than 180 °C, the P<inf>r</inf>of the BNT–17BT/YSZ was larger than that of the bulk ceramics. …

    Jpn. J. Appl. Phys. 56(10S), 10PF01, 2017-09-05

    応用物理学会

  • Domain walls and defects in ferroelectric materials

    Rojac Tadej , Damjanovic Dragan

    … The studies reveal why donor- and acceptor-doped Pb(Zr,Ti)O<inf>3</inf>behave differently, what is the role of stationary charged domain walls in enhanced properties of domain engineered BaTiO<inf>3</inf>crystals, and give evidence of a large concentration of specific charged point defects within domain walls in BiFeO<inf>3</inf>ceramics. …

    Jpn. J. Appl. Phys. 56(10S), 10PA01, 2017-09-05

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  • Ultra-large single crystals by abnormal grain growth

    Kusama Tomoe , Omori Toshihiro , Saito Takashi , Kise Sumio , Tanaka Toyonobu , Araki Yoshikazu , Kainuma Ryosuke

    … This result ensures that the range of applications of shape memory alloys will spread beyond small-sized devices to large-scale components and may enable new applications of single crystals in other metallic and ceramics materials having similar microstructural features. …

    Nature Communications 8, 2017-08-25

    機関リポジトリ DOI

  • 組織制御による窒化ケイ素の高熱伝導化と放熱基板への展開 (焼結による非酸化物セラミックスの微構造制御と機能向上)

    平尾 喜代司 , 周 游 , 宮崎 広行 , 日向 秀樹

    粉体および粉末冶金 = Journal of the Japan Society of Powder and Powder Metallurgy : 紛体粉末冶金協会誌 64(8), 439-444, 2017-08

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