Solution Stoichiometry Control for Pure LiLaMo2O8Phases in Sol-Gel Preparation |
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Authors: | VG Kessler AN Panov NYa Turova AYu Borissevitch |
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Institution: | (1) Department of Chemistry, Moscow State University, 119899 Moscow, Russia;(2) Higher School of Materials Science, Moscow State University, 119899 Moscow, Russia |
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Abstract: | The hydrolysis of solutions, containing either LiMo2O4(OPr
i
)5(
i
PrOH) and “La(OPr
i
)3” or LiOPr
i
and La2Mo4O8(OPr
i
)14 in 1∶1 ratio, in toluene or
i
PrOH, by water solutions in isopropanol, leads to formation of monolythic gels. The latter can be converted by drying and
heat treatment at 600°C into a fine powder of pure α-LiLaMo2O8 phase, which is transformed into β-LiLaMo2O8 powder by annealing at 800°C. The sintering of the pellets pressed under 4 bar pressure of α-LiLaMo2O8 powder at 800°C for 2 h converts them into pieces of β-LiLaMo2O8 transparent ceramics, thus providing a route to LiLnMo2O8 laser waveguide materials. |
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Keywords: | heterometallic alkoxides hydrolysis gelation laser materials |
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