Study on Preparation and Performance of CaO-ZrO₂ Composite Powders

Abstract:

CaO-ZrO₂ composite powders were synthesized by liquid phase coprecipitation using ethanol as reaction medium and washing solution. The green compacts were formed by dry pressing and were sintered by pressureless sintering. The morphology, size and distribution of the particles were studied by transmission electron microscopy (TEM); the microstructure of sintered bodies was analyzed by scanning electron microscopy (SEM), the density of green compacts and sintered bodies were tested by the mass and dimension. The results showed that 5 mol% CaO-ZrO₂ composite powders with good dispersion, particle size distribution were obtained. The fractured surfaces of sintered bodies prepared by the powders were smooth without any cracks. When contained 5-15mol% CaO, the relative density of sintered bodies exceeded 95%. When the molding pressure was 20Mpa, the relative densities of sintered bodies were all above 97%.

• Periodical: Advanced Materials Research (Volume 826)
• Pages: 244-247
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.826.244
• Online since: November 2013
• Authors: Yang Li*, Shao Yan Wang
• Keywords: Composite Powders, Coprecipitation, Ethanol, Zirconia

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