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The effects of high-energy ball milling on the synthesis, sintering and microwave dielectric properties of Li2TiO3 ceramics
Authors: Ghaffari Somaye | Ebadzadeh Touradj | Alizadeh Masoud | Asadian Keivan | Ganjkhanlou Yadolah | Shafeeyan Mohammad Saleh
Year: 2018
Type of publication: článek v odborném periodiku
Name of source: Journal of Materials Science: Materials in Electronics
Publisher name: Springer
Place: Heidelberg
Page from-to: 10933-10941
Titles:
Language Name Abstract Keywords
cze Vliv vysokoenergetického mletí na syntézu, slinování a mikrovlnné dielektrické vlastnosti Li2TiO3 keramiky Byl zkoumán vliv vysokoenergetického mletí na syntézu a slinování Li2TiO3. Dále byla zpracována XRD a termální analýza získaných prášků. Byla stanovena hustota, průměrná zrnitost a připravených materiálů a dielektrické vlastnosti. magnetické nanočástice; chemická kompatibilita; aktivovaný uhlík; vodné směsi; fáze; mikrostruktura
eng The effects of high-energy ball milling on the synthesis, sintering and microwave dielectric properties of Li2TiO3 ceramics The effect of high-energy ball milling (HEBM) on the synthesis and sintering of Li2TiO3 was investigated. XRD Phase analysis of milled powders revealed a common phenomenon of peak broadening due to crystallite size reduction and loss of long-range periodicity. Thermal analysis results showed that the formation of Li2TiO3 can be facilitated with high-energy ball mill. Density measurement of sintered parts revealed that milling time of 5 h (HEBM-5) is sufficient to achieve a high density of 3.19 g/cm(3) (93.82% of the theoretical density) at low sintering temperature of 1100 A degrees C. The average particle size of synthesized Li2TiO3 powder was about 150 nm. SEM observations revealed the achievement of dense microstructures with abnormal grain growth. Optimal dielectric constant of epsilon (r) = 21.85, Q x f = 17510 GHz and tau (f) value of + 26 ppm/A degrees C were achieved. Li2TiO3 was also synthesized without high-energy milling and sintered at 1100 A degrees C and the density of 3.03 g/cm(3) (89.11% of theoretical density) was achieved. magnetite nanoparticles; chemical compatibility; activated carbon; aqueous mixtures; phase; lif; microstructure; silver

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