Study of (molybdenum + tellurium) by Knudsen-effusion mass spectrometry
Vaporization of (molybdenum + tellurium) alloys was studied by Knudsen-effusion mass spectrometry. The partial pressures of Te 2 (g) and Te(g) over the two-phase field (Mo 3 Te 4 +MoTe 2 ) were determined in the temperature range T = 820 K to 950 K. The boundaries of the Mo 3 Te 4 phase were delineated by a continuous monitoring of the intensity of Te + 2 as a function of time, starting with samples having mass fractions 0.67187 and 0.68997 of Te. The phase-boundary compositions correspond to MoTe 1.10+/-0.03 (Mo-rich boundary) and MoTe 1.30+/-0.04 (Te-rich boundary), respectively. By employing the p(Te 2 ) determined as a function of composition, activities of Te were obtained; and by a Gibbs-Duhem integration, those of Mo were also computed at various compositions within the single-phase Mo 3 Te 4 . Our previously published p (Te 2 ) and p(Te 2 ) over (Mo+Mo 3 Te 4 ) (J. Chem. Thermodynamics1989, 21, 1183) were used to obtain revised enthalpy changes for the reactions: MoTe v (s) = Mo(s)+(v/i)Te i (g), where i = 1 or 2, and v = 1.10, the Mo-rich boundary composition of Mo 3 Te 4 determined in this work. The standard molar enthalpies of formation of MoTe 1.10 and MoTe 1.30 (Mo- and Te-rich boundaries of the Mo 3 Te 4 phase) as well as of MoTe 1.89 (Mo-rich boundary of the α-modification of the MoTe 2 phase) were derived.
유료 다운로드의 경우 해당 사이트의 정책에 따라 신규 회원가입, 로그인, 유료 구매 등이 필요할 수 있습니다. 해당 사이트에서 발생하는 귀하의 모든 정보활동은 NDSL의 서비스 정책과 무관합니다.
원문복사신청을 하시면, 일부 해외 인쇄학술지의 경우 외국학술지지원센터(FRIC)에서
무료 원문복사 서비스를 제공합니다.
NDSL에서는 해당 원문을 복사서비스하고 있습니다. 위의 원문복사신청 또는 장바구니 담기를 통하여 원문복사서비스 이용이 가능합니다.
- 이 논문과 함께 출판된 논문 + 더보기