کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
1506102 993781 2009 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Rapid synthesis of A2(MoO4)3 (A = Y3+ and La3+)with a CO2 laser
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
Rapid synthesis of A2(MoO4)3 (A = Y3+ and La3+)with a CO2 laser
چکیده انگلیسی

Negative thermal expansion material of yttrium molybdate and positive thermal expansion material of lanthanum molybdate have been successfully synthesized by rapid solidification with a CO2 laser. Both materials were solidified in densely packed blocks with smooth surface and glazing color. They have similar microstructures consisting of nano-particles or nano-dendrites with grain sizes around 20–30 nm. Raman spectroscopic and XRD analyses reveal that lanthanum molybdate crystallized in a high temperature phase of tetrahedral La2Mo3O12, whereas yttrium molybdate crystallized in an orthorhombic Y2Mo3O12. This synthetic route is a very rapid process with which a sample can be synthesized within a few seconds and holds prospect for the synthesis of other rare earth molybdates and tungstates.

Lanthanum molybdate shows similar microstructure as yttrium molybdate but they crystallize in different phases (tetrahedral for La2Mo3O12, and orthorhombic forY2Mo3O12).Figure optionsDownload as PowerPoint slide

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Solid State Sciences - Volume 11, Issue 1, January 2009, Pages 139–143
نویسندگان
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