氧化层对钛吸附与解吸氘的动力学影响研究(Ⅱ)——氧化层对氘化钛热解吸动力学的影响

Effects of Oxide Layer on Deuterium Adsorption and Desorption Kinetics of Titanium (Ⅱ)——Effect of Oxide Layer on Desorption Kinetics of Titanium Deuteride

摘要: 测定了3种不同氧化层厚度的氘化钛在873～1073K范围内的热解吸反应速率常数,得到673K下氧化5、2h的氘化钛和未经氧化处理的氘化钛热解吸氘的活化能分别为(29.0±1.0)、(27.6±1.0)和(24.9±1.4)kJ/mol。实验表明:氘化钛表面氧化层具有阻氘性能,氘化钛表面氧化层越厚,表观活化能越大。

Abstract: The deuterium desorption behavior of titanium deuteride with oxide layer on the surface in a constant volume system was investigated in the temperature range of 873 to 1 073 K. The activation energy obtained by the desorption analysis is (29.0±1.0)、(27.6±1.0) and (24.9±1.4) kJ/mol, respectively for titanium deuteride oxided for five, two hours at 673 K and non-oxided. The experimental results prove that the thicker the oxide layer in surface of titanium deuteride is, the larger the activation energy is; and that the oxide layer has the property of blocking deuterium.