Stability optimisation of CaO-doped partially stabilised zirconia by microwave sintering
| Autor: | Kang Juanxue, Jinhui Peng, Zhang Mingyuan, Mamdouh Omran, Pu Jing, Guo Chen, Lei Gao |
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| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Process Chemistry and Technology Doping Sintering 02 engineering and technology 021001 nanoscience & nanotechnology 01 natural sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Thermogravimetry symbols.namesake Crystallinity Differential scanning calorimetry Chemical engineering visual_art 0103 physical sciences Materials Chemistry Ceramics and Composites visual_art.visual_art_medium symbols Cubic zirconia Ceramic 0210 nano-technology Raman spectroscopy |
| Zdroj: | Ceramics International. 45:23278-23282 |
| ISSN: | 0272-8842 |
| Popis: | In this study, the stability of CaO-doped partially stabilised zirconia was optimised by microwave sintering at 950 °C with holding times between 1 and 4 h. The sintered products are potential refractory ceramics having applicability in high-temperature processes in the metallurgical industry. Thermogravimetry/differential scanning calorimetry (TG/DSC) analysis was used to investigate the thermal degradation of the material during the sintering process. The sintered products were characterised by X-ray diffraction (XRD), Raman spectroscopy, and particle size analysis to evaluate the transformation of polymorphs. The characterisation results indicated that the proposed sintering process was beneficial for improving the crystallinity of the material. The stability value of the as-received zirconia, which was 88.14%, increased upon sintering. That is, the stability values of the sintered products obtained with holding times of 1 h, 2 h, 3 h, and 4 h were 93.72%, 95.35%, 94.72%, and 95.12%, respectively. Additionally, stabilised tetragonal zirconia was formed successfully, and its particle diameter was smaller than that of the as-received zirconia. |
| Databáze: | OpenAIRE |
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