Raman Spectroscopy Measurements of the Pressure-Temperature Behavior of LiAlH4

被引：11

作者：

Fallas, Juan C. ^{[1
]}

Chien, Wen-Ming ^{[1
]}

Chandra, Dhanesh ^{[1
]}

Kamisetty, Vamsi K. ^{[1
]}

Emmons, Erik D. ^{[2
]}

Covington, Aaron M. ^{[3
,4
]}

Chellappa, Raja ^{[5
]}

Gramsch, Stephen A. ^{[5
]}

Hemley, Russell J. ^{[5
]}

Hagemann, Hans ^{[6
]}

机构：

[1] Univ Nevada, Mat Sci & Engn Div, Dept Chem & Met Engn MS 388, Reno, NV 89557 USA

[2] USA, Edgewood Chem Biol Ctr, AMSRD ECB RT DL BLDG E5560, Aberdeen Proving Ground, MD 21010 USA

[3] Univ Nevada, Dept Phys, Reno, NV 89557 USA

[4] Univ Nevada, Nevada Terawatt Facil MS 220, Reno, NV 89557 USA

[5] Carnegie Inst Sci, Geophys Lab, Washington, DC 20015 USA

[6] Univ Geneva, Dept Phys Chem, CH-1211 Geneva, Switzerland

来源：

JOURNAL OF PHYSICAL CHEMISTRY C | 2010年 / 114卷 / 27期

基金：

美国国家科学基金会;

关键词：

INDUCED PHASE-TRANSITIONS; METAL ALUMINUM HYDRIDES; THERMAL-DECOMPOSITION; NEUTRON; TRANSFORMATIONS; DIFFRACTION; NAALH4;

D O I：

10.1021/jp1015017

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The pressure/temperature phase diagram of LiAlH4 has been constructed by using Raman spectroscopy data. In situ high pressure temperature experiments were carried out using resistively heated diamond anvil cells up to 150 degrees C and 7 GPa. Room temperature phase transitions of monoclinic alpha-LiAlH4 -> delta-LiAlH4 were observed at similar to 3.2 GPa. As the temperature is increased to similar to 100 degrees C, both the alpha and delta phases transform to beta-LiAlH4 and remain stable up to 5.5 GPa. At temperatures greater than 300 degrees C, a new gamma-LiAlH4 phase forms. Data of Konovalov (1995) has been used to define the phase boundary between beta- and gamma-LiAlH4 phases. We present a pressure temperature phase diagram of LiAlH4 based using diamond anvil cells coupled with Raman spectroscopy.

引用

页码：11991 / 11997

页数：7

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