|
|
|
Journal of the Korean Ceramic Society 1998;35(1): 5. |
| 다성분 산화물 요업체의 고온 물라이트화 반응 정량분석 |
| 신현호, 김철수, 김창욱, 장순남, 성완, 장동환1, 강석원1, 최석홍1 |
국방과학연구소 제1연구개발본부
1한국티타늄공업 주식회삭 부설 뉴세라믹스 연구소 |
| Quantitative Analysis of High-Temperature Mullitization from a Multicomponent Oxide System |
|
|
|
|
|
|
|
| ABSTRACT |
|
Mullitization in a multicomponent oxide system(alumina-kaolin-quartz-feldspar-talc) was studied as a function of sintering temperature from 1200 to 1500$^{circ}C$ based upon a quantitative X-ray diffraction analysis. In the present study mullite grew as wiskers and its formation reaction showed characteristic there stages as follows In the first stage(1255-1295$^{circ}C$) an appreciable mullitization(nucleation) occurred while corun-dum dissolution into glass (increasing glass content ) limited the rate of the reaction. At 1295-1335$^{circ}C$ (second state) the reaction was significantly enhanced with a considerable glass consumption and with no appreciable change in corundum content. Finally (above 1335$^{circ}C$) the reaction rate was attenuated re-markably with an apparent decrease in glass consumption rate. The impingement of mullite whiskers by oth-er whiskers and crystals was speculated to cause mullite growth in thickness direction with a slow growth rate resulting in the diminished reaction rate in the final stage. |
| Key words:
Mulltization, Multiconponent oxides, Reaction mechanism |
|
|
|
PDF Links
Full text via DOI 
Download Citation 
