Preparing CeO\-2 by precipitation method using oxalic acid as precipitator was studied.TGA and DTA shows that the precursor decomposes completely when temperature is up to 600 ℃.And the weight loss increases appreciably with the prolonging of calcination time.XRD analysis shows that the powder is fluorite in structure.The crystallite size calcined at 600 ℃ is 20.15 nm,and the crystallite constant is 0.54 nm.With the prolonging of the calcinating time,there was only a little increment.TEM shows that the part...
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