TY - JOUR
T1 - Application of the SHS technique in the synthesis of the perovskite-type MgxCyNi3 compound
AU - Ferretti, M.
AU - Ciccarelli, C.
AU - Magnone, E.
AU - Rubino, S.
AU - Parodi, N.
AU - Martinelli, A.
PY - 2004/4/2
Y1 - 2004/4/2
N2 - The almost complete conversion of a powder mixture of the elements into the perovskite-type MgxCyNi3 compound has been obtained in two steps, applying the SHS technique followed by an isothermal treatment at 1123K. No evidence was found for Mg loss due to volatilisation, as well as of unreacted C, at the end of the preparation. Two new ternary phases, that may be referred to as Mg2+xNiCy and Mg 1+xNi2Cy, grew during the combustion process; though different, their crystal structures appear to be strongly related to those of Mg2Ni and MgNi2, respectively. Isothermal treatments at 973K failed in the formation of the perovskite-type compound as a single product, since it was found coexisting with Ni and Mg 1+xNi2Cy, probably on account of the relatively short reaction times. The samples were characterised by means of XRPD and SEM-EDS analyses after each step of preparation.
AB - The almost complete conversion of a powder mixture of the elements into the perovskite-type MgxCyNi3 compound has been obtained in two steps, applying the SHS technique followed by an isothermal treatment at 1123K. No evidence was found for Mg loss due to volatilisation, as well as of unreacted C, at the end of the preparation. Two new ternary phases, that may be referred to as Mg2+xNiCy and Mg 1+xNi2Cy, grew during the combustion process; though different, their crystal structures appear to be strongly related to those of Mg2Ni and MgNi2, respectively. Isothermal treatments at 973K failed in the formation of the perovskite-type compound as a single product, since it was found coexisting with Ni and Mg 1+xNi2Cy, probably on account of the relatively short reaction times. The samples were characterised by means of XRPD and SEM-EDS analyses after each step of preparation.
KW - A. Magnetic materials
KW - A. Superconductors
KW - B. Chemical synthesis
KW - C. Electron microscopy
KW - C. X-ray diffraction
UR - http://www.scopus.com/inward/record.url?scp=1642298866&partnerID=8YFLogxK
U2 - 10.1016/j.materresbull.2003.12.001
DO - 10.1016/j.materresbull.2003.12.001
M3 - Article
AN - SCOPUS:1642298866
SN - 0025-5408
VL - 39
SP - 647
EP - 654
JO - Materials Research Bulletin
JF - Materials Research Bulletin
IS - 4-5
ER -