Microstructure and properties evaluation of TiO2 ceramics with multi-oxides glass additions
| Autor: | Shih-jeh Jimmy Wu, Boen Houng, Sue Han Lu, Wei Chueh Chien |
|---|---|
| Rok vydání: | 2014 |
| Předmět: |
Anatase
Materials science Process Chemistry and Technology Sintering Dielectric Microstructure Surfaces Coatings and Films Electronic Optical and Magnetic Materials visual_art Phase (matter) Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Dielectric loss Dilatometer Ceramic Composite material |
| Zdroj: | Ceramics International. 40:3731-3736 |
| ISSN: | 0272-8842 |
| DOI: | 10.1016/j.ceramint.2013.09.049 |
| Popis: | A unique glass composition based on GeO 2 , MoO 3 and V 2 O 5 (GMV) was designed to act as a sintering aid to enhance the densification and to adjust the dielectric constant of TiO 2 . This allows the low temperature co-fired ceramic processing (LTCC) of approximately 750 °C to be feasible with a desirable dielectric property. The effect of GMV glass concentration on the densification behavior and dielectrics properties of TiO 2 was investigated by dilatometer, x-ray diffractometer, scanning electron microscopy and transmission electron microscopy. The addition of glass not only was found to accelerate the TiO 2 phase transformation from anatase to rutile, but also to increase the densification rate and the grain size of TiO 2 . The glass additive formed a thin continuous liquid phase and rearranged TiO 2 particles into a dense microstructure at much lower temperature. The dielectric constants of TiO 2 were ranged from 28 to 45 depending on the concentration of glass additive, while the dielectric loss was decreased with the glass concentration as a result of denser TiO 2 microstructure. |
| Databáze: | OpenAIRE |
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