Microwave dielectric properties of SiO2 ceramics with addition of Li2TiO3
| Autor: | Peng Liu, Chengxi Hu |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Materials science
Microwave dielectric properties Mechanical Engineering Analytical chemistry Mineralogy Condensed Matter Physics Microstructure Chemical reaction Phase evolution Tridymite Mechanics of Materials visual_art Phase (matter) visual_art.visual_art_medium General Materials Science Ceramic |
| Zdroj: | Materials Research Bulletin. 65:132-136 |
| ISSN: | 0025-5408 |
| DOI: | 10.1016/j.materresbull.2015.01.034 |
| Popis: | Using a conventional solid-state reaction method SiO 2 ceramics with addition of Li 2 TiO 3 were synthesized and their phase evolution, chemical reactions, microstructure and microwave dielectric properties were studied. The microwave dielectric properties of SiO 2 ceramics with addition of Li 2 TiO 3 strongly depend on the formation and the decomposed of Li 2 (TiO)(SiO 4 ) intermediate phase. The tridymite phase was formed for all samples sintered above 1150 °C and its microwave dielectric properties were reported for the first time ( ϵ r = 2.58, Q × f = 25,800 GHz , τ f = −17.8 ppm/°C). The promising ceramics of 0.945SiO 2 –0.055Li 2 TiO 3 sintered at 1050 °C were found to possess good microwave dielectric properties: ϵ r = 3.21, Q × f = 10,180 GHz and τ f ∼ 0.17 ppm/°C. |
| Databáze: | OpenAIRE |
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