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Effects of Oxygen Pressure on the Crystalline of ZnO Films by PLD Method
조재형,허태봉,곽진성,권대영 부산대학교 유전체물성연구소 2005 유전체 논문집 Vol.4 No.
We studied the effects of oxygen pressure on the ctystalline of ZnO films on sapphire(001) substrates were deposited by the pulsed laser deposition (PLD) technique and were grown at various oxygen pressure ranging from 5 mtorr to 150 mtorr to investigate the effect of ambient O2 pressure on the structural properties of the films. We found that the lattice constant along the c-axis and the crystalline of ZnO films are sensitive to the O2 pressure.
Solubility of V2O5 in polycrystalline ZnO with different sintering conditions
Jung-Joo Kim,허태봉,Dae Young Kwon,김형국,Jin Sung Kwak,황윤회 한국물리학회 2005 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.47 No.2
We investigated solubility of V2O5 in ZnO ceramics by X-ray-scattering experiments with different sintering temperatures. We found that the solubility limit of V2O5 in ZnO ceramics was around 0.28 mol% when sintering temperatures were 750 C and 850 C. The -Zn3(VO4)2 phase in the V2O5-doped ZnO ceramics was more easily created and was more stable with 750 C sinteringtemperature than with 850 C sintering temperature. When the sintering temperature was 950 C, the solubility limit was around 0.18 mol% and -Zn3(VO4)2 phase of the sample was formed with a doping concentration of 0.20 mol%, due to an eutectic reaction in the ZnO-V2O5 system. We also found from photoluminescence measurements that the green band emission at room temperature in V2O5-doped ZnO ceramics was stronger than in pure ZnO.