Solid state reaction is a conventional method to synthesize structurally stable inorganic solids by mixing powdered reactants together at high pressure(over 1×10~5 mbar(1 mbar=100 Pa))and high temperature(over 1300 K)[1-4].This method is effective and sophisticated to prepare solid materials,especially the functional complex oxides such as high temperature superconductors,piezoelectrics,dielectrics,etc.However,the chemical reactions cannot be intrinsically controlled and integrated at an atomic level in order to achieve Solid state reaction is a conventional method to synthesize structurally stable inorganic solids by mixing powdered reactants together at high pressure (over 1 × 10-5 mbar (1 mbar = 100 Pa)) and high temperature (over 1300 K) [1-4] This method is effective and sophisticated to prepare solid materials, especially the functional complex oxides such as high temperature superconductors, piezoelectrics, dielectrics, etc. However, the chemical reactions can not be intrinsically controlled and integrated at an atomic level in order to achieve