菱铁矿热分解产物及其变化规律的研究

Study on the decomposition products of heat-treated siderite and it's change regularation

在空气环境下对天然菱铁矿进行热处理 ,XRD分析结果表明菱铁矿热分解产物变化非常复杂 ,其分解产物主要与热处理温度、保温时间及样品本身的结构特征有关 ;随着温度的升高 ,其产物出现的顺序为磁铁矿、磁赤铁矿、赤铁矿 .菱铁矿热分解的最终产物是赤铁矿 ,磁铁矿和磁赤铁矿作为菱铁矿分解的中间产物在一定的温度区间稳定存在 .图 3,表2 ,参

Siderite is heat treated in air condition.XRD shows:the decomposition products of heat treated siderite are very complicated.It maily reates to heat treated temperature,heat preservation time and structure of samples.With the heat treated temperature increased,the initial decomposition product is Fe 3O 4,then γ Fe 2O 3,finally α Fe 2O 3.The final decomposition product is α Fe 2O 3.Fe 3O 4 and γ Fe 2O 3 ,as the middle products,may steadily exist within certain temperature range.3figs.,2tabs.,12refs.