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Thermal desorption of dysprosium from tungsten microcrystal

机译:钨微晶中crystal的热解吸

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摘要

Activation energy for thermal desorption of dysprosium from a tungsten microcrystal of about 300 nm diameter was determined by means of the field-emission method. The desorption was detected from the whole W emitter surface in the temperature range 1490-1665 K for dysprosium average coverage theta < 0.06 monolayer. The average activation energy was determined to be 4.09 +/- 0.06 eV/atom and the frequency factor to be about 10(11) s(-1). The energy may mainly concern the desorption from the atomically rough regions of the microcrystal. (c) 2005 Elsevier B.V. All rights reserved.
机译:通过场发射法确定了from从直径约300 nm的钨微晶中热脱附的活化能。在1490-1665 K的温度范围内从整个W发射极表面检测到解吸,for平均覆盖度θ<0.06单层。确定平均活化能为4.09 +/- 0.06 eV /原子,频率因子约为10(11)s(-1)。能量可能主要涉及从微晶的原子粗糙区域解吸。 (c)2005 Elsevier B.V.保留所有权利。

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