PRODUCTION, STRUCTURAL CHARACTERIZATION AND THE STUDY OF STABILITY OF Ba_2AlZro_(5.5) CERAMICS IN CRUDE PETROLEUM FOR INERT CERAMIC EMBEDDING OF TEMPERATURE SENSORS USED IN PETROLEUM INDUSTRY

摘要

In the present work, we have produced zirconia based complex cubic perovskite oxide Ba_2AlZro_(5.5) ceramics and studied their stability in crude petroleum environment for the manufacture of inert ceramic embedding of temperature sensors used in petroleum extraction. Ba_2AlZro_(5.5) ceramic powder was prepared through thermo- mechanical processing. Structural characteristics of calcined material was investigated by powder X-ray diffractometry, which presented a single phase complex cubic perovskite structure with lattice parameter A= 8.3834A. Compacted Ba_2AlZrO_(5.5) ceramics bodies were sintered at 1300 and 1400℃ during 24h in ambient atmosphere. Microstructure of the sintered ceramics was studied by scanning electron microscopy and mechanical behavior was studied by Vickers micro-hardness testing. Sintered ceramics were submerged in crude petroleum for 60 days. Ceramics were taken out from the petroleum periodically and subjected to structural, microstructural and mechanical characterizations. Results showed that ceramics submerged in crude petroleum did not suffer change at any stage of submersion.