High Pressure Synthesis of Hydride in Li-Y System

Autor:	Masuo Okada, Hitoshi Takamura, Atsunori Kamegawa, Riki Kataoka, Takahiro Kuriiwa
Rok vydání:	2009
Předmět:	Materials science Hydrogen Hydride Mechanical Engineering Enthalpy Analytical chemistry chemistry.chemical_element Condensed Matter Physics symbols.namesake Lattice constant chemistry Mechanics of Materials Phase (matter) symbols General Materials Science Lithium Raman spectroscopy Ambient pressure
Zdroj:	MATERIALS TRANSACTIONS. 50:2069-2072
ISSN:	1347-5320 1345-9678
Popis:	High-pressure synthesis has been widely used for exploration of novel materials. In this study, Li-Y hydrides were explored under GPaorder pressure by using a cubic-anvil-type apparatus. Unfortunately, a novel hydride in Li-Y system was not synthesizedin this study, but it is found that 10 at% addition of Li can stabilize FCC-YH3 high pressure phase even under ambient pressure. The Li added FCC-YH3 have a CeH3type structure judging from the results of XRD and raman spectrometry and its lattice constant was estimated to be 0.52666(1) nm. Total hydrogen content of the hydride was estimated to be 3.52 mass%. This hydride was partially dehydrogenated at 575 K with decreasing its lattice constant down to 0.5206(1) nm. Then, the sample could absorb hydrogen again under 5 MPa-H2 at 623 K. Hydrogenation enthalpy of the hydride
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::f9352d32876467552e7c159504986edf https://doi.org/10.2320/matertrans.m2009011 Zobrazit plný text záznamu