V. A. Shutaev, E. A. Grebenshchikova, V. A. Matveev, N. N. Gubanova, Yu. P. Yakovlev
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引用次数: 0
Abstract
The kinetics of changing in optical transmittance of palladium (Pd) nanolayers (about 10 nm thick, deposited on object glass substrates by thermal evaporation in vacuum) in hydrogen flow (100% H2) in the temperature range of 300–335 K are studied. It is shown that the rate of changing of palladium optical transmittance at hydrogen flow rises linearly with increasing the temperature due to sorption of hydrogen by Pd layer. The rate of changing in optical transmittance of Pd layer during sorption and desorption of hydrogen is established to rise by about one order with increasing the temperature from 300 to 335 K. The curves describing the changing in optical transmittance of palladium nanolayer during hydrogen desorption have two distinct sections: linear and nonlinear. The linear section of the curve weakly depends on temperature, while the nonlinear section sharply rises with increasing the temperature. Such the changing of the rate in optical transmittance can be associated with phase transition from β- to α-phase during hydrogen desorption from palladium.
摘要 研究了在 300-335 K 温度范围内氢流(100% H2)中钯(Pd)纳米层(厚约 10 nm,在真空中通过热蒸发沉积在物体玻璃基片上)透光率变化的动力学。结果表明,由于钯层吸附了氢气,氢气流动时钯的透光率变化率随温度的升高呈线性上升。在吸附和解吸氢气的过程中,钯层的透光率变化率随着温度从 300 K 升至 335 K 而上升约一个数量级。描述纳米钯层在氢气解吸过程中透光率变化的曲线有两个不同的部分:线性和非线性。曲线的线性部分与温度关系不大,而非线性部分则随着温度的升高而急剧上升。这种光学透射率的变化可能与钯在氢解吸过程中从β相到α相的相变有关。
期刊介绍:
Optics and Spectroscopy (Optika i spektroskopiya), founded in 1956, presents original and review papers in various fields of modern optics and spectroscopy in the entire wavelength range from radio waves to X-rays. Topics covered include problems of theoretical and experimental spectroscopy of atoms, molecules, and condensed state, lasers and the interaction of laser radiation with matter, physical and geometrical optics, holography, and physical principles of optical instrument making.