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RISS 인기검색어
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- 저자 : 김종옥(J.O. KIM) (검색결과 3 건)
- 무료
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김택남,김종옥,조성준,Kim, T.N.,Kim, J.O.,Cho, S.J. 배재대학교 자연과학연구소 1995 自然科學論文集 Vol.8 No.1
알루미나와 Hydroxyapatite(HAp)의 결합을 연구하기 위하여 9 가지의 중간 유리상을 연구하였다. 그 중간상의 화학 조성은 $CaO-Al_2O_3$에서 정하였으며 CaO/$Al_2O_3$의 몰 비율은 0.5에서 3 까지 변화 시켰다. 가장 낮은 용융은 CaO/$Al_2O_3$의 몰 비율이 2이고 $1355^{\circ}C$때 나타났다. $Al_2O_3$의 양을 증가시킴에 따라 용융점은 점점 높아 졌고 많은 기공들이 발견 되었다. 단면 조직 조사에 따르면 높은 CaO양 시편에서 양호한 흡수접착을 발견할 수 있었고, 이것은 CaO/$Al_2O_3$ 비가 2보다 큰것에서 더좋은 흡수접착을 얻을 수 있음을 의미한다. 열처리후 상변태는 발견되었으나, HAp의 중요한 피크는 그대로 남아 있음을 알 수 있다. Several intermediate glasses are investigated to bond the alumina and the hydroxyapatite (HAp). The chemical compositions of the intermediate glasses are chosen as $CaO-Al_2O_3$. The mole ratio of CaO/$Al_2O_3$ is changed from 0.5 to 3.0. The lowest melting is observed at $1355^{\circ}C$ in the specimen of CaO/$Al_2O_3$ at the mole ratio of 2. With increasing contents of $Al_2O_3$, the melting temperatures gradually increase and a number of pores are observed. The sectional microstructure shows that the good wetability is observed in higher contents of CaO specimens. This implies that the good wetability is obtained in the mole ratio range of CaO/$Al_2O_3geq2$. The phase transformations are observed after treatment but the major peaks of HAp still exist.
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유리탱크로의 구조변경에 따른 열정산계산 및 유리품질 비교
이선영,김종옥,임대영,김택남,박원규 培材大學校 1997 培材論叢 Vol.2 No.-
In order to make good quality glass in glass tank furnace, the geometrical dimensions such as melting area, length to width ratio, glass depth, checker height must be carefully considered on the basis of construction and operational requirements. The purpose of this research was to find the effects of changing melting capacity on the glass quality and energy savings in glass tank furnace. The size of glass tank furnace was changed from 15' X 24' to 15' X 26', the checker height of regenerator from 8.05 m to 10.3 m, glass depth of furnace from 864 mm to 950 mm. The glass quality and heat balance was observed and measured by various methods such as oxygen detect, temperature measurements etc. The results are as follows (1) Melting capacity is increased from 70 ton/day to 75 ton/day. (2) Hot spot moved to 0.9 m to throat and the glass melting depth is increased from 34" to 37". This is due to the increase of melting capacity. (3) Energy efficiency increased about 1.13 % after changing melting capacity and the energy loss due to the exhausted gas was reduced. (4) Number of seed was reduced from 1.5 to 1.1 after changing the glass tank furnace. This implied that glass quality was increased.
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