Thorium is most commonly precipitated as oxalate, because of the high efficiency regardless of precipitation conditions. Thorium oxalate readily decomposes into fine-grained ThO₂ during heating, but keeps the macrostructure of the oxalate platelets. To assess the effects of precipitate macrostructure on the sintering behavior, different platelet morphologies were prepared and sintered. There are two factors which influence the sintering: the presence of holes within the platelets and the size of the platelets. Small platelets or precipitates with holes generally sinter to thorium dioxide pellets of a higher density and smaller grain size.

中文翻译：

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纳米晶ThO _2的形貌依赖烧结路径

ium最常以草酸盐形式沉淀，因为无论沉淀条件如何，效率都很高。草酸在加热过程中容易分解成细颗粒的ThO ₂，但保持草酸血小板的宏观结构。为了评估沉淀物宏观结构对烧结行为的影响，制备并烧结了不同的血小板形态。有两个影响烧结的因素：血小板内孔的存在和血小板的大小。小片状或带孔的沉淀物通常烧结成较高密度和较小粒度的二氧化th颗粒。