Search Results - "Lee, Hwack Joo"

Low temperature growth and photoluminescence of well-aligned zinc oxide nanowires by Lyu, Seung Chul, Zhang, Ye, Ruh, Hyun, Lee, Hwack-Joo, Shim, Hyun-Wook, Suh, Eun-Kyung, Lee, Cheol Jin

“…Well-aligned single-crystalline zinc oxide (ZnO) nanowires with high density were successfully synthesized on nickel monoxide (NiO) catalyzed alumina substrate…”
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Influence of sintering conditions on piezoelectric properties of KNbO3 ceramics by Kim, Dae-Hyeon, Joung, Mi-Ri, Seo, In-Tae, Hur, Joon, Kim, Jong-Hyun, Kim, Bo-Yun, Lee, Hwack-Joo, Nahm, Sahn

“…A homogeneous KNbO3 (KN) phase was formed in specimens that were sintered at 1020°C and 1040°C, without formation of the K2O-deficient secondary phase,…”
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Low-Temperature Sintering and Piezoelectric Properties of CuO-Added KNbO3 Ceramics by Kim, Dae-Hyeon, Joung, Mi-Ri, Seo, In-Tae, Hur, Joon, Kim, Jong-Hyun, Kim, Bo-Yun, Lee, Hwack-Joo, Nahm, Sahn

“…Dielectric and piezoelectric properties of CuO‐added KNbO3 (KN) ceramics were investigated. The CuO reacted with the Nb2O5, formed a CuO–Nb2O5‐related liquid…”
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Effect of ZnO and CuO on the Sintering Temperature and Piezoelectric Properties of a Hard Piezoelectric Ceramic by Ahn, Cheol-Woo, Song, Hyun-Cheol, Nahm, Sahn, Priya, Shashank, Park, Seung-Ho, Uchino, Kenji, Lee, Hyeung-Gyu, Lee, Hwack-Joo

“…Hard piezoelectrics with high dielectric and piezoelectric constants are used for high‐power applications. However, the sintering temperature of these ceramics…”
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Low-Temperature Sintering and Piezoelectric Properties of 0.65Pb(Zr1−xTix)O3-0.35Pb(Ni0.33Nb0.67)O3 Ceramics by Nam, Chan-hee, Park, Hwi-Yeol, Seo, In-Tae, Choi, Jae-Hong, Joung, Mi-Ri, Nahm, Sahn, Lee, Hwack-Joo, Kim, Young-Heon, Sung, Tae Hyun

“…0.65Pb(Zr1−xTix)O3–0.35Pb(Ni0.33Nb0.67)O3 (0.65PZTx–0.35PNN) ceramics exhibited a morphotropic phase boundary at approximately x=0.58–0.59. The…”
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Microstructure and Piezoelectric Properties of 0.95(Na0.5K0.5)NbO3-0.05SrTiO3 Ceramics by Cho, Kyung-Hoon, Park, Hwi-Yeol, Ahn, Cheol-Woo, Nahm, Sahn, Uchino, Kenji, Park, Seung-Ho, Lee, Hyeung-Gyu, Lee, Hwack-Joo

“…The 0.95(Na0.5K0.5)NbO3–0.05SrTiO3 (0.95NKN–0.05ST) ceramics formed in this study had a porous microstructure with small grains and low piezoelectric…”
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Structural variation and piezoelectric properties of 0.95(Na0.5K0.5)NbO3–0.05BaTiO3 ceramics by Ahn, Cheol-Woo, Park, Hwi-Yeol, Nahm, Sahn, Uchino, Kenji, Lee, Hyeung-Gyu, Lee, Hwack-Joo

“…A dense microstructure was developed for the 0.95(Na0.5K0.5)NbO3-0.05BaTiO3 (0.95NKN-0.05BT) ceramics sintered at above 1050 deg C. Grain growth was observed…”
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Effect of B2O3 and CuO additives on the sintering temperature and microwave dielectric properties of Ba(Zn1/3Nb2/3)O3 ceramics by KIM, Min-Han, JEONG, Young-Hun, NAHM, Sahn, KIM, Hyo-Tae, LEE, Hwack-Joo

“…The B2O3-added Ba(Zn1/3Nb2/3)O3 (BBZN) ceramic was sintered at 900 C. BaB4O7, BaB2O4, and BaNb2O6 secondary phases were found in the BBZN ceramic. Since BaB4O7…”
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Low-Temperature Sintering and Microwave Dielectric Properties of the Zn2SiO4 Ceramics by Kim, Jin-Seong, Nguyen, Ngoc-Huan, Lim, Jong-Bong, Paik, Dong-Soo, Nahm, Sahn, Paik, Jong-Hoo, Kim, Jong-Hee, Lee, Hwack-Joo

“…B2O3 was added to nominal composition Zn1.8SiO3.8 (ZS) ceramics to decrease their sintering temperature for application to low‐temperature cofired ceramic…”
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Low temperature sintering of the Ba2Ti9O20 ceramics using B2O3/CuO and BaCu(B2O5) additives by LIM, Jong-Bong, YOUNG HUN JEONG, NGUYEN, Noc-Huan, NAHM, Sahn, PAIK, Jong-Hoo, KIM, Jong-Hee, LEE, Hwack-Joo

“…The effects of B2O3/CuO and BaCu(B2O5) additives on the sintering temperature and microwave dielectric properties of Ba2Ti9O20 ceramics were investigated. The…”
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Microstructure and Microwave Dielectric Properties of Ba(Zn1/3Ta2/3)O3 Ceramics with ZrO2 Addition by Yang, Jung-In, Nahm, Sahn, Choi, Chang-Hack, Lee, Hwack-Joo, Park, Hyun-Min

“…The effect of ZrO2 on crystallographic order, microstructure, and microwave dielectric properties of Ba(Zn1/3Ta2/3)O3 (BZT) ceramics was investigated. A small…”
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Effects of microstructure on the microwave dielectric properties of Ba(Co1/3Nb2/3)O3 and (1-x)Ba(Co1/3Nb2/3)O3-xBa(Zn1/3Nb2/3)O3 ceramics by AHN, Cheol-Woo, JANG, Hyun-Jung, NAHM, Sahn, PARK, Hyun-Min, LEE, Hwack-Joo

“…Ba(Co1/3Nb2/3)O3 (BCN) has a 1:2 ordered hexagonal structure. A large amount of the liquid phase, which contains high concentrations of Ba and Nb ions was…”
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Low-Temperature Growth of ZnO Nanowire Array by a Simple Physical Vapor-Deposition Method by Lyu, Seung Chul, Zhang, Ye, Lee, Cheol Jin, Ruh, Hyun, Lee, Hwack Joo

“…Well-aligned single-crystalline wurzite zinc oxide (ZnO) nanowire array was successfully fabricated on an Al2O3 substrate by a simple physical vapor-deposition…”
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Effect of B2O3 and CuO on the sintering temperature and microwave dielectric properties of the BaTi4O9 ceramics by LIM, Jong-Bong, NAHM, Sahn, KIM, Hyo-Tae, KIM, Jong-Hee, PAIK, Jong-Hoo, LEE, Hwack-Joo

“…Issue Title: Special Issue: ICE-2005 International Conference on Electroceramics The effect of B^sub 2^O^sub 3^ and CuO on the sintering temperature and…”
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Low temperature sintering of BaO-Sm2O3-4TiO2 ceramics by CHO, Kyung-Hoon, LIM, Jong-Bong, NAHM, Sahn, KIM, Hyo-Tae, KIM, Jong-Hee, PAIK, Jong-Hoo, LEE, Hwack-Joo

“…BaSm2Ti4O12 was prepared by solid state synthesis and calcined at 1100 C. The sintered material was then re-milled with additions of B2O3 and CuO as sintering…”
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Low‐Temperature Sintering and Piezoelectric Properties of CuO ‐Added KNbO 3 Ceramics by Kim, Dae‐Hyeon, Joung, Mi‐Ri, Seo, In‐Tae, Hur, Joon, Kim, Jong‐Hyun, Kim, Bo‐Yun, Lee, Hwack‐Joo, Nahm, Sahn

“…Dielectric and piezoelectric properties of CuO ‐added KNbO 3 ( KN ) ceramics were investigated. The CuO reacted with the Nb 2 O 5 , formed a CuO – Nb 2 O 5…”
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TEM Observations on 0.65 Pb ( Zr 0.42 Ti 0.58 ) O 3 ‐0.35 Pb ( Ni 0.33 Nb 0.67 ) O 3 Ceramics with CuO Additive by Kim, Young Heon, Ryu, Hyun, Cho, Yang‐Koo, Lee, Hwack‐Joo, Nahm, Sahn

“…The microstructural properties and the chemical compositions of a 0.65 Pb ( Zr 0.42 Ti 0.58 ) O 3 ‐0.35 Pb ( Ni 1/3 Nb 2/3 ) O 3 (0.65 PZT 58‐0.35 PNN )…”
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Low‐Temperature Sintering and Piezoelectric Properties of 0.65Pb(Zr 1− x Ti x )O 3 –0.35Pb(Ni 0.33 Nb 0.67 )O 3 Ceramics by Nam, Chan‐hee, Park, Hwi‐Yeol, Seo, In‐Tae, Choi, Jae‐Hong, Joung, Mi‐Ri, Nahm, Sahn, Lee, Hwack‐Joo, Kim, Young‐Heon, Sung, Tae Hyun

“…0.65Pb(Zr 1− x Ti x )O 3 –0.35Pb(Ni 0.33 Nb 0.67 )O 3 (0.65PZT x –0.35PNN) ceramics exhibited a morphotropic phase boundary at approximately x =0.58–0.59. The…”
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Structural variation and microwave dielectric properties of TiO2-doped Ba(Zn1/3Ta2/3)O3 ceramics by KIM, Min-Han, NAHM, Sahn, LEE, Woo-Sung, YOO, Myong-Jae, GANG, Nam-Gi, LEE, Hwack-Joo

“…The effect of TiO2 on microstructure and microwave dielectric properties of Ba(Zn1/3Ta2/3)O3 (BZT) ceramics was investigated. The addition of TiO2 did not…”
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Temperature-Dependent Growth of Vertically Aligned Carbon Nanotubes in the Range 800−1100 °C by Lee, Yun Tack, Park, Jeunghee, Choi, Young Sang, Ryu, Hyun, Lee, Hwack Joo

“…We investigated the effect of temperature on the growth rate and structure of carbon nanotubes using scanning electron microscopy, transmission electron…”
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