COMPLEX OXIDES FOR THERMAL BARRIER COATING WITH REDUCED RARE-EARTH CONTENTS AND MANUFACTURING METHOD THEREOF

摘要

The present invention is a rare earth reduction-type hot environment ranks pyeyong low thermal conductivity compound oxidate ceramics, as manufacturing method, more specifically, 2 O 7-1. of formula A 2-x Zr5x is (however, A is Gd, Sm or Dy, 0& X 1) it is shown to have a temperature-fluorine light (fluorite) crystal structure environment ranks and is related to a low thermal conductivity and a kind of a kind of method for manufacturing ceramic composite oxide for a shielding coating. Hot environment ranks pyeyong low thermal conductivity compound oxidate ceramics according to the present invention are high point and cause to reduce production cost with supplying a kind of instable content of rare earth element of possibility and reducing compared with conventional can, one non-stoichiometric (non-stoichiometric) ingredient, which has, to be removed this point defect (point defect) of the public (vacancy) action increase phon scattering (phon scattering) as rare earth element and can cause other to reduce in terms of thermal conductivity, ratio is improved in conjunction with the non-coordinating increase extension of (anharmonicity), thermal conductivity, the thermal expansion coefficient for increasing reduction in this way is as (YSZ, stoichiometrical rare earth zirconate, etc.) conventional material and the high quality for a thermal barrier coating material due to excellent more or phase same level, even if this can be useful comparison.