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首页> 外文期刊>Applied radiation and isotopes: including data, instrumentation and methods for use in agriculture, industry and medicine >M#ssbauer Study on Reduction Behavior of Iron Oxide Supported on Porous Glass: Hydrogen Reduction and He↑(+) Ion Bombardment Effect
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M#ssbauer Study on Reduction Behavior of Iron Oxide Supported on Porous Glass: Hydrogen Reduction and He↑(+) Ion Bombardment Effect

机译：M＃ssbauer研究多孔玻璃上负载的氧化铁的还原行为：氢还原和He↑（+）离子轰击效应

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摘要

Hydrogen reduction behavior and the effect of 40 keV He↑(+) ion bombardment were studied for iron supported on porous glass by M#ssbauer spectroscopy. Iron species in as-prepared samples, gave two quadrupole-split doublets due to octahedrally coordinated Fe↑(3+) species in M#ssbauer spectra, were assigned to small α-Fe↓(2)O↓(3) particles. Both hydrogen reduction and ion bombardment led to the formation of an Fe↑(2+) species, whose M#ssbauer spectra have been fitted with two Fe↑(2+) quadrupole-split doublets attributable to tetrahedrally and octahedrally coordinated Fe↑(2+) species. No metallic iron was produced by either of the reduction processes. The yield of Fe↑(2+) species by ton bombardment went up unexpectedly to ca. 80%, indicating that the reduction occurs beyond the range of the incident He↑(+) ions. The re-oxidation behavior of Fe↑(2+) species by air-exposure was also examined. # 1997 Elsevier Science Ltd
机译：M＃ssbauer光谱法研究了多孔玻璃上负载的铁的氢还原行为和40 keV He↑（+）离子轰击的影响。由于M＃ssbauer光谱中的八面体配位的Fe↑（3+）物种，所制备样品中的铁物种产生了两个四极分裂双峰，被分配给小的α-Fe↓（2）O↓（3）颗粒。氢还原和离子轰击均导致形成Fe↑（2+）物种，其M＃ssbauer光谱已与两个Fe↑（2+）四极分裂二重态匹配，这归因于四面体和八面体配位的Fe↑（2 +）种。两种还原方法均未产生金属铁。吨轰击产生的Fe↑（2+）物种的产量出乎意料地增加到了大约。 80％，表明还原发生在入射He↑（+）离子的范围之外。还研究了空气暴露下Fe↑（2+）物种的再氧化行为。 ＃1997爱思唯尔科学有限公司

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