| 진공건조에 의한 Y, Ba, Cu 질산염의 Oxalate 침전물에 대한 연구 |
| 김배연, 이득용1, 김철민, 이창제, 정성식 |
인천대학교 신소재공학과
1대림대학 재료공학과 |
| Characterization of Vacuum Dried Y, Ba, and Cu Oxalate Precipitates |
| Bae-Yeon Kim, Deuk-Yong Lee1, Chul-Min Kim, Chang-Jae Lee, Sung-Sik Jung |
Department Materials Engineering, University of Incheon
1Department Materials Engineering, Daelim College of Technology |
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| ABSTRACT |
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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. |
| Key words:
Superconductor, Oxalate, Coprecipitation, Vacuum drying, XRD |
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