℃时，稳定性CaO＞MgO＞ZrO＞AlO（）ACaO＞AlO＞ZrO＞MgOBCaO＞ZrO＞MgO＞AlOCCaO＞ZrO＞AlO＞MgODCaO＞MgO＞ZrO＞AlO