초록

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精製한 高嶺土와 ${\alpha}$-$Al_2O_3$을 枕降法에 의해 10${\mu}$ 이하의 것만 포집하여 이 두 물질을 3A-2S의 比率로 혼합하여 高溫인 1350 ~ 1450$^{\circ}$C에서 燒成하여 反應速度를 測定하였다. 速度의 測定結果는 Jander의 式에 잘 맞았으며 Jander式의 修正式들이 만족할만한 결과를 주지 못하였다. 鑛化劑(mineralizer)를 넣었을 때는 같은 溫度에서 收率이 15% 정도 높았고 活成化 에너지는鑛化劑 를 넣지 않았을 때의 142kcal/mol보다 적은 90kcal/mol로反應 이 쉽게 진행됨을 보여 주었다.

Abstract ▼ AI-Helper

Purified kaolin and ${\alpha}$-$Al_2O_3$ particiles which are less then 10${\mu}$ in diameter were collected through sedimentation and mixed in the ratio of 3A-2S and then its reaction rates were measured at temperatures 1350 to 1450$^{\circ}$C. The kinet...

Purified kaolin and ${\alpha}$-$Al_2O_3$ particiles which are less then 10${\mu}$ in diameter were collected through sedimentation and mixed in the ratio of 3A-2S and then its reaction rates were measured at temperatures 1350 to 1450$^{\circ}$C. The kinetic data were correlated with Jander's equation, but not with modified Jander's equation. With mineralizer added, yield increased about 15% and activation energy decreased from 142kcal/mol to 90kcal/mol.