Dehydriding Kinetics of the Mg2NiHx by Isothermal Thermogravimetry Analysis

등온 열중량 분석에 의한 Mg2NiHx 탈수소화 반응속도 연구

  • Hong, Tae Whan (Dept. of Advanced Materials Eng., Graduate School of SungKyunKwan Univ.) ;
  • Kim, Young Jig (Dept. of Advanced Materials Eng., Graduate School of SungKyunKwan Univ.)
  • 홍태환 (성균관대학교 대학원 신소재공학과) ;
  • 김영직 (성균관대학교 대학원 신소재공학과)
  • Published : 2000.03.15

Abstract

In order to investigate the dehydriding properties of the $Mg_2NiH_x$ formed by hydrogen induced mechanical alloying, we performed isothermal thermogravimetry analysis at 453, 463, 473, 483, 493, 503 and 513K for 1 hours. Dehydrogenation kinetics were dependant strongly on the MA conditions which determine the In other words, kinds of synthesized hydrides phases and the crystal microstructures. The MA condition, 66:1 BCR(balls to chips mass ratio), especially 96h milling time, revealed the hydride phases of nano-/ amorphous state and the dehydriding activation energy of $43.4{\pm}3.6kJ/mole$.

Keywords

ITGA;hydrides phases;dehydriding activation energy