| 摘要 |
PURPOSE: A low thermal conductivity composite oxide for high temperature environment thermal barrier and a manufacturing method thereof are provided to prevent growth of constituent particle under high temperature exposure and to maximize phonon scattering effect which is related to thermal conductance. CONSTITUTION: A low thermal conductivity composite oxide for high temperature environment thermal barrier accomplishes fluorite - pyrochlore dual structure and is marked as (A,B)O2-C2D2O7. A indicates La, B indicates ZrxCe1-x (0<x<0.5), C indicates La, and D indicates ZryCe1-y (0.5<y<1). A manufacturing method of the low thermal conductivity composite oxide for high temperature environment thermal barrier comprises the following steps: measuring La2O3, ZrO2, and CeO2 powders by calculating molar ratio of La2O3, ZrO2, and CeO in order to accomplish (La,ZrxCe1-x)O2 (0<x<0.5)-La2(ZryCe1-y)2O7 (0.5<y<1); pulverizing the La2O3, ZrO2, and CeO2 powders by mixing powders thereof; incinerating the pulverized compound powder; molding the calcinated compound powder; and sintering the moldings.
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| 申请人 |
KOREA INSTITUTE OF CERAMIC ENGINEERING AND TECHNOLOGY |
发明人 |
KIM, SEONG WON;KWAK, KIL HO;OH, YOON SUK;LEE, SUNG MIN;KIM, HYUNG TAE |
