Synthesis of New Hydrides in Mg-Y Systems by Using High Pressure
Synthesis of New Hydrides in Mg-Y Systems by Using High Pressure
复制标题
Mg-Y 体系中高压合成新型氢化物
DOI：
10.2320/matertrans.43.2717
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发表时间：
2002
影响因子：
1.2
通讯作者：
M. Okada
中科院分区：
文献类型：
--
作者：
Y. Goto;A. Kamegawa;H. Takamura;M. Okada
在5 Gpa的高压下，在MGH2-YH3体系中发现了一种新的氢化物，并研究了它们的晶体结构、热稳定性和氢含量。高压合成在1073K下进行，反应时间为2 h，压力为5 Gpa。在mGaH2-xat%YH3体系(x=33-100)中，在x=67(MGy2Hy)附近合成了新型氢化物。该相为面心立方结构，晶胞参数为a=0.516 nm。该高压相在600 K左右的Ar气氛下脱氢，脱氢后仍保持面心立方结构。在约600K时，氢的脱附量为1.4质量%。
A new hydride in the MgH 2 -YH 3 system was found by using a high pressure of 5 GPa, and their crystal structure, thermal stability and hydrogen content were studied. The high-pressure synthesis was carried out at 1073 K for 2 h under 5 GPa by using an anvil-type apparatus. In the MgH 2 -xat%YH 3 system (x = 33-100), novel hydride was synthesized near x = 67 (MgY 2 H y ). This phase exhibited a FCC-type structure with a cell parameter of a = 0.516 nm. This high-pressure phase was dehydrogenated at about 600 K under an Ar atmosphere of 0.05 MPa, and the FCC structure was maintained after dehydrogenation. The amount of hydrogen desorbed at about 600 K was 1.4 mass%.