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http://dx.doi.org/10.4191/KCERS.2007.44.8.457

Characterization of Vacuum Dried Y, Ba, and Cu Oxalate Precipitates  

Kim, Bae-Yeon (Department Materials Engineering, University of Incheon)
Lee, Deuk-Yong (Department Materials Engineering, Daelim College of Technology)
Kim, Chul-Min (Department Materials Engineering, University of Incheon)
Lee, Chang-Jae (Department Materials Engineering, University of Incheon)
Jung, Sung-Sik (Department Materials Engineering, University of Incheon)
Publication Information
Journal of the Korean Ceramic Society / v.44, no.8, 2007 , pp. 457-463 More about this Journal
Abstract
Y, Ba and Cu nitrates were precipitated by oxalic acid at pH 4. The Y, Ba and Cu oxalate powders were vacuum dried and characterized by XRD, DT/TGA and etc. Yttrium nitrate precipitated as $NH_4Y(C_2O_4){_2}H_2O$ and converted to $Y_2O_3$ above $450^{\circ}C$. Ba precipitated with two phases, $Ba(HC_2O_4){_2}2H_2O\;and\;Ba(C_2O_4)$. The amount of each precipitates was 4 : 1, Cu precipitated non-hydrated form, $Cu(C_2O_4)$. The vacuum drying was successful to characterize precipitated powder, which had been generally known as amorphous gel.
Keywords
Superconductor; Oxalate; Coprecipitation; Vacuum drying; XRD;
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