以高锰酸钾（KMn04）和硫酸锰（Mns04）为主要原料，在pH≈9．温度为170℃时水热反应72h，制备了MnO2微晶体，利用x射线粉末衍射（XRD）、透射电子显微镜（TEM）等手段对产物进行了表征。结果表明．产物主要为a-MnO2，呈现纺锤状形貌，另外含有少量的MnOOH。其平均直径大约为4～5gμm，长度在15～30μ之间。%Abstract： Spindle-type MnO2 was synthesized by hydrothermal method at pH~9, 170 ~C for 72 h, using KMnO4 and MnSO4 asmain raw materials. The product prepared was characterized by X-ray powder diffraction （XRD）, scan electron microscopy （SEM）. The results showed that the product is composed of MnO2, a tetragonal phase, containing a little of MnOOH of monoclinic single phase. The average diameters of spindle-type MnO2 were 4-5 pm, its length ranging from about 15 μm to 30μm.
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