한편 MA처리를 60시간까지 실시하면 발열 반응이 관찰되지 않았으며 이것은 MA에 의한 고상 반응이 완료되었음을 의미하는 것이다.
On the other hand, when the MA treatment was carried out for up to 60 hours, no exothermic reaction was observed, which means that the solid phase reaction by the MA was completed.