| 침전법을 이용한 YAG분말의 합성 및 소결 |
| 하성민, 이재홍1, 박준영1, 심수만 |
홍익대학교 재료공학부
1홍익대학교 재료공학 |
| Preparation and Sintering of YAG Powder Prepared by Precipitation |
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| ABSTRACT |
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Yttrium Aluminum Garnet (YAG) powders were synthesized by precipitation of solutions of Al and Y nitrates using ammonium hydrogen carbonate as a precipitant. Y$_2$O$_3$ and YAG phases were formed in the precipitates, which had been attrition-milled. Well-crystallized, phase-pure YAG powders were obtained after calcination of the milled precipitates at 1100$^{circ}C$ for 1 h. The powders were found to exhibit an excellent sinterability regardless of the addition of SiO$_2$(500 ppm Si) as a sintering aid. All samples already densified to relative densities greater than 70% at 1300$^{circ}C$ and relative densities of ∼83％ at 1400$^{circ}C$. The samples doped with SiO$_2$ showed a little improvement in densification as compared with those for the undoped samples and resulted in a relative density of 97% at 1600$^{circ}C$. |
| Key words:
YAG, Powder, Precipitation, Synthesis, Sinterability |
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