Özet:

CMAS (CaO-MgO-Al2O3-SiO2) based ceramics were fabricated by using dolomite, kaoline and zirconia as raw materials. Natural calcia and magnesia containing material (dolomite) and silica and alümina containing kaolin were used to develop a new ceramic of CMAS system. The calculated amounts of oxides for the indicated compositions were ball milled for 3 h using distilled water as the milling media. After drying, the powders pressed in cylindrical mould under the pressure of 300 MPa. The samples were fired in an electric furnace with a heating rate of 10ºC.minute-1 at 900ºC to 1200ºC for periods of 1, 3, and 5 hours. Then, the fired samples were cooled to room temperature in the furnace. Microstructure of produced CMAS ceramics were investigated and their phases analysis was determined. The effects of ZrO2 oxide on microstructure and phase structure of CMAS ceramics were also investigated.

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