Na1－xZr2－xNbxP3O12系列化合物的水热晶化研究

采用水热晶化反应，制备出传统需要高大相反合成的掺杂，ＮＡＳＩＣＯＮ化合物Ｎａ１－ｘＺｒ２－ｘＮｂｘＰ３Ｏ１２（０＜Ｘ＜１），并应用ＸＲＤ，ＩＲ方法对产物的晶体结构进行了研究。表明水热晶化产物是纯的物相并具有与ＮａＺｒ２Ｐ３Ｏ１２相同的结构，固体＾３１ＰＮＭＲ研究证实Ｎｂ＾５＋部分取代了Ｚｒ＾４＋所在位置，参与骨架的组成，并统计分布于结构中，水热晶化产物与固相反应产物具有相同的离子电导性能。     

A hybrid scheme for computing incompressible two-phase flows

We propose a hybrid scheme for computations of incompressible two-phase flows. The incompressible constraint has been replaced by a pressure Poisson-like equation and then the pressure is updated by the modified marker and cell method. Meanwhile, the moment equations in the incompressible Navier-Stokes equations are solved by our semidiscrete Hermite central-upwind scheme, and the interface between the two fluids is considered to be continuous and is described implicitly as the 0.5 level set of a smooth function being a smeared out Heaviside function. It is here named the hybrid scheme. Some numerical experiments are successfully carried out, which verify the desired efficiency and accuracy of our hybrid scheme.