A low-temperature route for the synthesis of nanocrystalline LaB6

作者：Zhang Maofeng; Yuan Liang; Wang Xiaoqing; Fan Hai; Wang Xuyang; Wu Xueying; Wang Haizhen; Qian Yitai^*

来源：Journal of Solid State Chemistry, 2008, 181(2): 294-297.

DOI：10.1016/j.jssc.2007.12.011

• LaB6
• nanoparticles
• nanocubes
• low temperature
• synthesis

Nanocrystalline lanthanum hexaboride (LaB6) with mean particle size of 30nm has been successfully synthesized at 400 degrees C in an autoclave starting from metallic magnesium powder, NaBH4 and LaCl3. In this case, by using B2O3 instead of NaBH4, LaB6 nanocubes with mean size of similar to 200 nm were formed at 500 degrees C. The X-ray diffraction (XRD) pattern can be indexed as cubic LaB6 with the lattice constant of a = 4.151 angstrom for LaB6 nanoparticles and 4.154 angstrom for LaB6 nanocubes. An atomic ratio of La and B as 1:5.94 was determined from EDS for LaB6 nanoparticles. XPS data of LaB6 nanocubes indicate the atomic ratio of La to B as 1:5.95. Raman spectra indicate the formation of LaB6.

• 出版日期2008-2
• 单位中国科学技术大学