纳米二氧化锆制备过程的DSC、TGA和XRD研究

Study of the Preparation of Nano ZrO₂ Powder by DSC, TGA and XRD Techniques

摘要: 用DSC、TGA和XRD技术研究了在沉淀法制备纳米ZrO₂的过程中,残留NH₄Cl、pH值、滴加方式、以及结构稳定剂Y₂O₃的添加量对结晶过程的影响。结果表明,残留NH₄Cl使结晶化温度降低,使放热过程变为吸热过程。而pH值、滴加方式和结构稳定剂的添加对结晶过程无明显影响。

Abstract: DSC, TGA and XRD techniques have been used to study the influence of NH₄Cl,pH value,titration method and the amount of Y₂O₃ additive on the crystallization of nano powder.The results prove that the presence of NH₄Cl plays a dominant role on the crystallization of nano ZrO₂ powder.The other factors have no apparent influence on the crystallization. If there is no residual NH₄Cl, the crystalliation which takeS place at 445℃ is an exothermic process,on the contrary the crystallization Which takes place at 376℃ is an endothermic process.