오영주 정순효 심재동 2024-01-22T00:16:36Z 2024-01-22T00:16:36Z 2022-01-10 1990-05 https://pubs.kist.re.kr/handle/201004/147104 The carbothermic reduction of Nb-oxide and refining of Nb metal with Ar/Ar-H//2 plasma. Ar/Ar-H//2 플라즈마에 의한 Nb 산화물의 탄소용융환원 및 Nb 금속의 정련 = Article 3 대한금속학회지 = J. of the Korean inst. of metals, v.v. 28, no.no. 5, pp.453 - 461 대한금속학회지 = J. of the Korean inst. of metals v. 28 no. 5 453 461 N argon/hydrogen arc plasma niobium oxide carbothermal reduction niobium refining deoxidation decarburization