PVA-Al(III) 착물 첨가 $UO_2$소결체와 AlOOH 첨가 $UO_2$소결체의 소결 특성 비교

The Comparison of Sintering Characteristics between the PVA-Al(III) Complex added $UO_2$Pellet and AlOOH added $UO_2$pellet

  • 발행 : 2000.01.01

초록

$UO_2$분말에 PVA-Al(III) 착물과 AlOOH를 각각 0.03~1.0wt%를 첨가하여 소결체를 제조한 후 소결체 특성을 비교하였다. PVA-Al(III) 착물과 AlOOH는 $1000^{\circ}C$의 소소분위기에서 열분해하는 경우 생성상은 $\theta-Al_2O_3$이었다. 순수 $UO_2$분말에 비해 AlOOH가 첨가된 혼합 분말의 곁보기 밀도는 더 높았고, PVA-Al(III) 착물이 첨가된 혼합 분말은 더 낮은 겉보기 밀도를 보였다. AlOOH가 첨가된 소결체의 경우 약 $800^{\circ}C$ 부근에서 치밀화가 시작되었지만, PVA-Al(III) 착물이 첨가된 소결체의 경우에는 약 $900^{\circ}C$에서 치밀화가 시작되었다. 기공 크기 분포는 AlOOH가 첨가된 $UO_2$소결체의 경우에 monomodal 형태로, 그리고 PVA-Al(III) 착물의 첨가된 소결체의 경우에는 bimodal 형태로 나타났다. 결정립 크기는 1wt% 첨가시 AlOOH가 첨가된 $UO_2$소결체의 경우에 약 $13\mu\textrm{m}$이었지만, PVA-Al(III) 착물의 첨가된 소결체의 경우에는 약 $\36mu\textrm{m}$까지 성장하는 현저한 효과를 확인하였다.

The sintering characteristics of PVA-Al(III) complex added $UO_2$ pellet and AlOOH added $UO_2$pellet were compared. The major phase of PVA-Al(III) complex and AlOOH decomposed at $1000^{\circ}C$ in $H_2$atmosphere was $\theta-Al_2O_3$. Compared with the apparent density of pure $UO_2$, that of AlOOH added $UO_2$ powder was higher but that of PVA-Al(III) complex was lower. the densification of AlOOH added $UO_2$ pellet was initiated at about $800^{\circ}C$, the densification of PVA-Al(III) complex added $UO_2$ pellet was initiated at about $900^{\circ}C$ respectively. In a view of pore size distribution, the PVA-Al(III) complex added $UO_2$ pellet appeared as monomodal type, whereas the AlOOH added $UO_2$ pellet appeared as bimodal type. The grain size of AlOOH added $UO_2$ pellet was about $13\mu\textrm{m}$ but the grain size of PVA-Al(III) complex added $UO_2$ pellet was increased up to about $36\mu\textrm{m}$.

키워드

참고문헌

  1. J. Nucl. Mater. v.153 G. Maler;H. Assmann;W. DoRR
  2. Nucl. Eng. & Des. v.48 H. Assmann;H. Stehle
  3. J. Nucl. Mater. v.68 H. Assmann;R. Manzel
  4. J. Nucl. Mater. v.79 A.J.E. Foreman;M.J. Makin
  5. J. Nucl. Mater. v.114 W. Hering
  6. J. Nucl. Mater. v.50 J. A. Turnbull
  7. IAEA-SR-7/23 J. E. Littlechild;G. G. Butler
  8. Nucl. Tech. v.26 W. Chubb;A. C. Hott;B. M. Argall;G. R. Klip
  9. Nucle. Eng. Inter. J. E. Littlechild;L. F. Raven
  10. IAEA-SM 33/16 J. B. Ainscough;L. F. A. Raven;P. T. Sawbridge
  11. J. Nucl. Mater. v.95 P. T. Swabridge;C. Baker;R. M. Cornell;K. W. Jones;D. Reed
  12. J. Nucl. Mater. v.84 J. R. Mattews;M. W. Wood
  13. KAERI/RR-908/89 장인순(외)
  14. 요업학회지 v.35 no.8 이신영;김형수;노재성
  15. 요업학회지 v.36 no.8 이신영;김형수;노재성