测定和计算了一系列超细均分散胶体Ｙ（ＯＨ）Ｃｏ＿３形成过程中的热力学参数，并运用唯象模型研究了其形成过程中的热力学稳定性。结果表明，Ｙ（ＯＨ）ＣＯ＿３超细均分散胶粒只在较狭窄的过饱和度范围（１＜ｘ＜１．０８）内稳定。 The thermodynamic parameters of a series of ultrafine disperse colloidal Y (OH) Co_3 were determined and calculated, and the thermodynamic stability during the forming process was studied by using the phenomenological model. The results showed that Y (OH) CO_3 superfine disperse colloids were stable only in the narrow range of supersaturation (1