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열 플라즈마 인가 전류변화에 의한 ZrVFe 합금 나노분말의 제조특성에 관한 연구
한창석(Chang-Mik Han),정민희(Min-Hee Jung),김헌창(Heon-Chang Kim) 호서대학교 공업기술연구소 2007 공업기술연구 논문집 Vol.26 No.1
Plasma Display Panel (PDP), among various FPD’s, is considered as the most promising candidate for large area display due to its manufacturing process appropriate for a large displaying area, and a good display quality. The getter which can be continuously absorbed and eliminated the generated impurities gas such as O 2 , H 2 , CO, etc. from MgO, barrier rib and fluorescent substances during operation, should be installed in the PDP cell. As a result of install getter in the cell, we could obtain the extending the life time of the PDP with a good display quality. To manufacture getter possessing excellent absorption efficiency, it was produced particles of nano size. In this research, alloy nano powders are synthesized by transferred thermal plasma process which is a promising method to produce composite nano powders of various metals, and also provides high temperature environment(104 K), extremely fast and intense chemical reactions. In this study, the thermal plasma system was operated in a transferred mode and the raw material was used Zr, V ,Fe (57 : 35.8 : 7.2) alloy of ingot type which made from arc melting method, and the produced particles were analyzed according to changing plasma input current range from 120[A] to 160[A] by SEM, EDS, PSA, XRD, BET, PSA (Particle Size Analyzer) and BET analysis of particles synthesized by changing thermal plasma input current. Average size of particles is from 83.2[nm] to 47.8[nm] smaller, in result, we confirmed difference of approximately 35[nm] in diameter of the synthesized particle according to increasing plasma input current because particles was rapidly condensate from difference in temperature of between plasma column area of a high temperature and surround area of plasma column. Result of BET analysis is in inverse proportion to PSA result which has small value of particle diameter by increasing plasma input current. In case of 120[A], BET surface area of particle is 100.9[m2/g],and surface area of particle in condition of 160[A] is 211.2[m2/g]. Thus, as increasing plasma input current, BET surface area of the synthesized particle is more extend.
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