공학
한국표면공학회지 (44권3호 89-94)
Photocurrent Characteristics of Plasma Sprayed TiO2 Composite Coatings according to Additive Transition Metal
전이금속을 첨가한 플라즈마 TiO2 복합 용사피막의 광전류 특성
고병천;고영봉;박경채;
Ko, Byung-Chun;Ko, Young-Bong;Park, Kyeung-Chaea;
경북대학교 금속신소재공학과;한국화학융합시험연구원;
School of Materials Science and Metallurgical Engineering, Kyungpook National University;Korea Testing & Research Institute;
DOI : 10.5695/JKISE.2011.44.3.089
Abstract
In this study, the photocurrent characteristics of plasma sprayed $TiO_2$ coatings have been investigated according to additive transition metal (Fe, Mn, Nb powder) and heat treatment conditions. The plasma sprayed $TiO_2$ coatings by heat treatment at $400^{circ}C$ and 90 min had the higher photocurrent at ultraviolet light, no photocurrent at visible light. The photocurrent of plasma sprayed $TiO_2$ coatings added by Fe, Mn, Nb (named by plasma sprayed $TiO_2$ composite coatings) was lower than that of plasma sprayed $TiO_2$ coatings at ultraviolet light, as was low in intensity ratio of XRD(101)/(110). and the atomic percentage of oxygen by plasma sprayed $TiO_2$ composite coatings was higher than that by plasma sprayed $TiO_2$ coatings. The photocurrent of plasma sprayed $TiO_2$ composite coatings in heat treatment at $400^{circ}C$ and 90 min was higher than that of plasma sprayed $TiO_2$ coatings in same heat treatment conditions at ultraviolet and visible light, as was high in oxygen affinity by heat treatment.
Keywords
Plasma spray;$TiO_2$ composite coating;Ultraviolet light;Oxidation;Heat treatment;
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