Detecting the spinel–post-spinel transition in Fe3O4 by in situ electrical resistivity measurements
Detecting the spinel–post-spinel transition in Fe3O4 by in situ electrical resistivity measurements
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DOI：
10.1080/08957950903392092
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发表时间：
2009-12
影响因子：
2
通讯作者：
K. Schollenbruch;A. Woodland;D. Frost;F. Langenhorst
中科院分区：
文献类型：
--
作者：
K. Schollenbruch;A. Woodland;D. Frost;F. Langenhorst
采用多砧压机原位电阻率法研究了高温高压条件下磁铁矿向h-Fe3O4的相变过程。在压力≤9 GPa条件下的实验中，磁铁矿在加热和冷却过程中的电阻率路径相似，表明磁铁矿具有稳定性。在10和12 GPa的加热过程中，由于h-Fe3O4的形成，电阻率出现了明显的跳跃。TEM显微组织研究证实了这一结论。我们的结果表明，磁铁矿- h- fe3o4相边界几乎是等压的，必须在9 ~ 10 GPa之间。
The phase transformation of magnetite to h-Fe3O4 was investigated at high pressure and temperature by in situ resistivity measurements in a multi-anvil press. Experiments at pressures≤9 GPa show similar resistivity paths during heating and cooling, indicating the stability of magnetite. During heating at 10 and 12 GPa, a distinctive jump in resistivity occurred that is attributed to the formation of h-Fe3O4. Microstructural investigations by TEM confirm this conclusion. Our results imply that the magnetite–h-Fe3O4 phase boundary is nearly isobaric and must lie between 9 and 10 GPa.