Effect of nano-TiO2 content on the mechano-physical properties of electro-technical porcelain
| Autor: | D.A. Alonso-De la Garza, J.F. López-Perales, F.J. Vázquez-Rodríguez, Edén Rodríguez, Leonel Díaz-Tato, Anabel Alvarez-Mendez, José E. Contreras, J.J. Ruiz-Valdés |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Scanning electron microscope Sintering 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics Microstructure Ceramic matrix composite 01 natural sciences Indentation hardness Thermal expansion 0104 chemical sciences Compressive strength General Materials Science Composite material 0210 nano-technology Porosity |
| Zdroj: | Materials Chemistry and Physics. 254:123469 |
| ISSN: | 0254-0584 |
| Popis: | In the present work, the properties of triaxial porcelain for electrical applications were enhanced by consolidating the ceramic matrix using nanoscale particles. The influence of nano-titanium dioxide on the properties of uniaxially pressed samples sintering at 1250 °C was evaluated. Physical properties were determined by measuring the bulk density and porosity. The mechanical behavior was evaluated by compressive strength and microhardness. Microstructural analysis and phase analysis were carried out by scanning electron microscopy, X-ray diffraction, and Raman spectroscopy. The highest mechanical strength achieved by the nanostructured porcelain compositions was approximately 65% higher than that exhibited by the traditional siliceous porcelain. From a microstructure perspective, the nano-titanium dioxide particles developed compressive stresses (pre-stressing effect) in the vitreous phase, due to the different thermal expansion coefficients they display. Besides, the dispersed nano-titanium dioxide particles act as a strong barrier and thereby cause the deflection of crack when loading. |
| Databáze: | OpenAIRE |
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