经不同温度热处理后铁交换沸石的穆斯堡尔谱分析

Analysis of Mossbauer Spectra of Iron-exchange-zeolite after Heat Treatment at Various Temperatures

测量经不同温度热处理的铁交换沸石的穆斯堡尔谱,给出加热温度在600℃以下,沸石与β-FeOOH 共存,随着加热温度的升高沸石相的比例增加,并逐渐表现为非晶态。到600℃出现α-Fe_2O_3相,温度继续升高沸石相愈来愈少,加热温度为900～1000℃时沸石相不超过7%。

We have measured the M(?)ssbauer spectra of iron-exchange zeolite heat-treatedat various temperatures.The results demonstrate that under 600℃ the zeolite coe-xists with β-FeOOH,the relative rate of zeolite rises with the increase in tempera-ture and gradually becomes amorphous,the α-Fe_2O_3 phase appears at 600℃,thezeolite phase is getting less and less as the temperature increases,and the zeolitephase does not exceed 7% between 900℃ and 1000℃.