Search Results:　 1-20 of 822

1

Functionally Gradient Material Ceramics of Hydroxyapatite and Yttria Partially Stabilized Zirconia Prepared by Spark Plasma Sintering for Biocompatibility and Mechanical Strength

Kawagoe Daisuke , Eda Hokuto , Shinohara Akiko , Nakata Satoshi

… Fine powders of HA and Y-PSZ (ZrO2 + 3 mol % Y2O3) were poured into the graphite mold and then subjected to SPS at 1100 °C for 10 min. The outer layer has a mixing ratio of 70 wt % HA : 30 wt % Y-PSZ and the other layers are deposited by gradually changing the mixing ratio of HA and Y-PAZ. …

Jpn J Appl Phys 52(1), 01AM03-01AM03-4, 2013-01-25

The Japan Society of Applied Physics
2

Effect of Yb3+ Concentrations on the Upconversion Luminescence Properties of ZrO2:Er3+,Yb3+ Phosphors

Noh Hyeon Mi , Yang Hyun Kyoung , Moon Byung Kee , Choi Byung Chun , Jeong Jung Hyun , Choi Haeyoung , Kim Jung Hwan

… ZrO2:Er3+ and ZrO2:Er3+,Yb3+ phosphors were synthesized via a solvothermal reaction method. … As the Yb3+ concentration increased to a value above 0.05 mol, ZrO2 phosphors displayed a very stable tetragonal phase. … The green and red upconversion emissions of ZrO2:Er3+,Yb3+ phosphors were measured under the excitation with a 975 nm continuous wave diode laser, and the pump power dependence of upconversion intensity was investigated. …

Jpn J Appl Phys 52(1), 01AM02-01AM02-4, 2013-01-25

The Japan Society of Applied Physics
3

Production of ketones from pyroligneous acid of woody biomass pyrolysis over an iron-oxide catalyst

Mansur Dieni , Yoshikawa Takuya , Norinaga Koyo , Hayashi Jun-ichiro , Tago Teruoki , Masuda Takao

… Catalytic upgrading of pyroligneous acid, by-product from slow pyrolysis of woody biomass for char production, was carried out using zirconia-supported iron-oxide catalysts under a steam atmosphere at temperatures ranging from 623 to 723 K, and the effect of ZrO2 content in the ZrO2-FeOX catalysts on catalytic activity and ketone yields was investigated. …

Fuel 103, 130-134, 2013-01-00

IR CrossRef
4

Fabrication of Organic Thin-Film Transistors Based on Cross-Linked Hybrid Dielectric Materials

Wang Yuedan , Kim Yeonok , Lee Eunju , Kim Hongdoo

… Organic thin-film transistors (OTFTs) fabricated with ZrO2 hybrid insulators exhibit a carrier mobility of 0.21 cm2 V-1 s-1 with an I_{\text{on}}/I_{\text{off}} ratio of {\sim}10^{4}, a threshold voltage of -0.83 V, and a subthreshold swing of 0.39 V/decade. …

Jpn J Appl Phys 51(9), 09MJ02-09MJ02-5, 2012-09-25

The Japan Society of Applied Physics
5

Effects of Heating Time and Intermediate Heating on Sol--Gel-Processed ZrO2 Thin Films

Lee Seung Muk , Hwang Soo Min , Choi Jun Hyuk , Park Kyung , Kim Hyoungsub , Lim Jun Hyung , Joo Jinho

… Nanoscale-thick high-k ZrO2 films were fabricated via sol--gel method and the effects of heating time and an intermediate heat treatment on the microstructure and dielectric properties were studied. …

Jpn J Appl Phys 51(9), 09MF13-09MF13-4, 2012-09-25

The Japan Society of Applied Physics
6

Fabrication Conditions of Diopside for Millimeterwave Dielectrics

Ohsato Hitoshi , Terada Mio , Kawamura Keizou

… Fine calcined grain powders were fabricated using fine raw materials with more than 99.9% purity, milling well for 24 h using ZrO2 balls with ca. …

Jpn J Appl Phys 51(9), 09LF02-09LF02-4, 2012-09-25

The Japan Society of Applied Physics
7

Properties of experimental titanium cast investment mixing with water reducing agent solution

ZHANG Zutai , DING Ning , TAMAKI Yukimichi , HOTTA Yasuhiro , HAN-CHEOL Cho , MIYAZAKI Takashi

… ZrO2 and Al2O3 were selected as refractory materials to prepare three investments (Codes: A-C) according to the quantity of Zr. …

Dental Materials Journal 31(5), 724-728, 2012-09-01

J-STAGE CrossRef References (24)
8

Investigation of Internal Reforming Reaction at Low Temperature Using Micro Tubular Solid Oxide Fuel Cell [in Japanese]

WATANABE Naoki , KAWAKAMI Akira , OMURA Hajime , HOSHIKO Takuya , OE Toshiharu , ISHIHARA Tatsumi

… A micro tubular cell was composed of NiO/(ZrO2)0.9(Y2O3)0.1 anode-substrate, La0.8Sr0.2Ga0.8Mg0.2O2.8 electrolyte, and La0.6Sr0.4Co0.2Fe0.8O3 cathode. …

Electrochemistry 80(8), 566-573, 2012-08-05

J-STAGE CrossRef References (24)
9

Thickness dependence of proton conductivity of anodic ZrO2-WO3-SiO2 nanofilms

Ye Ke , Aoki Yoshitaka , Tsuji Etsushi , Nagata Shinji , Habazaki Hiroki

… Amorphous ZrO2-WO3-SiO2 nanofilms are simply prepared by anodizing of sputter-deposited Zr37W47Si16 alloy at several formation voltages for 1.8 ks in 0.1 mol dm-3 phosphoric acid electrolyte at 20℃. … The anodic oxide films consist of two layers, comprising a thin outer ZrO2 layer free from silicon and tungsten species and an inner main layer containing all zirconium, silicon and tungsten species. …

Journal of Power Sources 205, 194-200, 2012-05-01

IR CrossRef
10

N-Polarity InN/GaN/InAlN High-Electron-Mobility Transistors

Kuzmík Ján

… The structure comprises from the bottom, a relaxed InAlN buffer with Al mole fraction between 0.1 and 0.3, GaN spacer with thickness less than 1 nm, 5 nm strained InN, and 5 nm ZrO2 or HfO2 to insulate a gate. …

Applied Physics Express 5(4), 044101-044101-2, 2012-04-25

The Japan Society of Applied Physics References (21)
11

Effects of Support on Formation of Active Sites and Hydrodesulfurization Activity of Rhodium Phosphide Catalyst

KANDA Yasuharu , NAKATA Keisuke , TEMMA Chisato , SUGIOKA Masatoshi , UEMICHI Yoshio

… 担体には金属酸化物（MOx: SiO2，Al2O3，TiO2，MgOおよびZrO2）を用いた。 … 最適な温度で還元したRh–P/MOx触媒のHDS活性の序列はSiO2～TiO2～Al2O3＞MgO＞ZrO2となった。 … Rh–P/MOx触媒のTOFの序列はTiO2＞ZrO2＞Al2O3＞SiO2＞MgOとなり，これはチオフェン転化率の序列とは一致しなかった。 …

Journal of the Japan Petroleum Institute 55(2), 108-119, 2012-03-01

J-STAGE CrossRef References (46)
12

Bottom Electrode Modification of ZrO2 Resistive Switching Memory Device with Au Nanodots

Lee Dai-Ying , Yao I-Chuan , Tseng Tseung-Yuen

… The resistive switching properties of the ZrO2 memory devices with bottom electrode modification by using Au nanodots are investigated in this study. … Due to the tip of the Au nanodots on the Pt bottom electrode, it causes the higher electric field within the ZrO2 film above the nanodots due to reduced effective film thickness and induces the localized conducting filaments easily. …

Jpn J Appl Phys 51(2), 02BJ04-02BJ04-4, 2012-02-25

The Japan Society of Applied Physics
13

Characterization of Hf1-xZrxO2 Gate Dielectrics with 0\leq x\leq 1 Prepared by Atomic Layer Deposition for Metal Oxide Semiconductor Field Effect Transistor Applications

Chiang Chen-Kuo , Wu Chien-Hung , Liu Chin-Chien , Lin Jin-Fu , Yang Chien-Lun , Wu Jiun-Yuan , Wang Shui-Jinn

… In this work, we investigated the influence of incorporating zirconia (ZrO2) in HfO2 gate dielectric on the electrical properties and reliability of n-channel metal oxide semiconductor field effect transistors (nMOSFETs). … The improved reliability of the Hf1-xZrxO2 gate dielectric is attributed to the reduced charge trapping in the Hf1-xZrxO2 gate dielectric caused by the ZrO2 incorporation. …

Jpn J Appl Phys 51(1), 011101-011101-6, 2012-01-25

The Japan Society of Applied Physics
14

Carburized Cesium-doped Ni/ZrO_2 for Efficient Hydrogen Production and Less Carbon Deposition during Ethanol Steam Reforming

NAGAI Masatoshi , AKIYAMA Masato , OKI Yasunori

… Carburized Cs0.2Ni0.8/ZrO2 catalyst is useful for the steam reforming of ethanol (ethanol : water =1:13) at 773 K to produce hydrogen at 1.95 mmol/min/g-cat during 60 h, with 82 % CO2 selectivity with trace amounts of CO and CH4. … The cesium addition to the Ni/ZrO2 catalyst resisted the carbon deposition, kept more reducing Ni carbide and produced highly hydrogen. …

Journal of the Japan Petroleum Institute 55(1), 67-68, 2012-01-01

J-STAGE CrossRef References (5)
15

CO2 decomposition using electrochemical process in molten salts

Otake Koya , Kinoshita Hiroshi , Kikuchi Tatsuya , Suzuki Ryosuke O

… Two kinds of ZrO2 solid electrolytes were tested as an oxygen ion conductor, and the electrolytes removed oxygen ions from the molten salts to the outside of the reactor. … It was found that the rate determining step is the diffusion of oxygen ions into the ZrO2 solid electrolyte. …

Journal of Physics: Conference Series 379(1), 012038, 2012-00-00

IR CrossRef
16

Glycothermal synthesis of nanocrystalline ZrO2 powders at low temperature without mineralizers

KIL Hyun-Sig , HWAG Su-Hyun , RYU Je-Hyeok , LIM Dae-Young , CHO Seung-Beom

… Zirconia (ZrO2) nanoparticles were synthesized at temperature as low as 200°C through a glycothermal reaction using amorphous zirconium hydrous gel precursors and 1,4-butanediol as solvent, XRD and TEM data support that glycothermal processing method provides a simple low temperature route for producing highly crystallized ZrO2 nanoparticles without mineralizers, which could also be extended to other systems. …

Journal of the Ceramic Society of Japan 120(1398), 52-57, 2012

J-STAGE CrossRef
17

Effects of Second Phase Particle Dispersion on Kinetics of Isothermal Peritectic Transformation in Fe–C Alloy

Chen Liang , Matsuura Kiyotaka , Sato Daisuke , Ohno Munekazu

… It was observed that the existence of insolvable particle, ZrO2, in δ phase retarded the migration of δ/γ interface and also the migration of L/γ interface. … The retarding effect by the ZrO2 particles becomes strong as volume fraction of particles increases and/or particle radius decreases, which is qualitatively coincident with the effect of particles on grain growth (Zener pinning). …

ISIJ International 52(3), 434-440, 2012

J-STAGE CrossRef
18

Effects of Second Phase Particles on Migration of α/γ Interface during Isothermal α to γ Transformation

Chen Liang , Matsuura Kiyotaka , Ohno Munekazu , Sato Daisuke

… It was found that the insoluble particles, ZrO2 or TiO2 particles, could retard the migration of α/γ interface. … However, the retarding effect of ZrO2 on α/γ interface is not as strong as that on δ–ferrite (δ)/austenite (γ) interface during peritectic transformation. …

ISIJ International 52(10), 1841-1847, 2012

J-STAGE CrossRef
19

Corrosion of Nozzle Refractories by Liquid Inclusion in High Oxygen Steels

Cho Mun-Kyu , Jung In-Ho

… In order to understand the corrosion mechanism of stopper refractories by liquid MnO–SiO2–FeO–MnS inclusion in high oxygen steels, the chemical reaction between the liquid MnO–SiO2–FeO–MnS slag and several refractories including Al2O3–C, Spinel–C, Al2O3–AlN–C and ZrO2–C were performed at 1550°C. …

ISIJ International 52(7), 1281-1288, 2012

J-STAGE CrossRef
20

Development of Alternative Abrasives of Cerium Oxide for Glass Polishing [in Japanese]

LEE SeungBok , KIRINO Okiharu , 谷泰弘 , 村田順二

… In response to the requests, the authors have proposed the zirconium oxide (ZrO2) abrasive as the alternative abrasive of the cerium oxide. …

TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series C 78(791), 2710-2719, 2012

J-STAGE CrossRef

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