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Ultralow-dielectric constant microwave dielectric ceramic GdYV2O8 with high thermal stability and low loss
The invention discloses a tetragonal zirconia structure temperature-stable ultralow-dielectric constant microwave dielectric ceramic material GdYV2O8 capable of being sintered at lower temperature, and a preparation method thereof. The preparation method comprises the steps of (1) weighing and compounding the original powder of Gd2O3, Y2O3 and V2O5 with the purity of at least 99.9 percent (weight percentage) according to the composition of the GdYV2O8; (2) by taking distilled water as a ball milling medium, mixing the raw materials in step (1) by wet ball milling for 12 hours, drying, and then presintering in 800 DEG C atmosphere for 6 hours; (3) adding a binder into powder prepared in step (2), prilling, then performing compression moulding, and finally sintering in 850 to 900 DEG C atmosphere for 4 hours, wherein the binder adopts a polyvinyl alcohol solution with the mass concentration of 5 percent, and the additive amount of polyvinyl alcohol is 3 percent of the total mass of the powder. The prepared ceramic is well sintered below 900 DEG C, has a dielectric constant of 11.1 to 11.7, a quality factor (Qf) value up to 133000 to 182000 GHz and a small temperature coefficient of resonance frequency, and has great application value in industry.
Ultralow-dielectric constant microwave dielectric ceramic GdYV2O8 with high thermal stability and low loss
The invention discloses a tetragonal zirconia structure temperature-stable ultralow-dielectric constant microwave dielectric ceramic material GdYV2O8 capable of being sintered at lower temperature, and a preparation method thereof. The preparation method comprises the steps of (1) weighing and compounding the original powder of Gd2O3, Y2O3 and V2O5 with the purity of at least 99.9 percent (weight percentage) according to the composition of the GdYV2O8; (2) by taking distilled water as a ball milling medium, mixing the raw materials in step (1) by wet ball milling for 12 hours, drying, and then presintering in 800 DEG C atmosphere for 6 hours; (3) adding a binder into powder prepared in step (2), prilling, then performing compression moulding, and finally sintering in 850 to 900 DEG C atmosphere for 4 hours, wherein the binder adopts a polyvinyl alcohol solution with the mass concentration of 5 percent, and the additive amount of polyvinyl alcohol is 3 percent of the total mass of the powder. The prepared ceramic is well sintered below 900 DEG C, has a dielectric constant of 11.1 to 11.7, a quality factor (Qf) value up to 133000 to 182000 GHz and a small temperature coefficient of resonance frequency, and has great application value in industry.
Ultralow-dielectric constant microwave dielectric ceramic GdYV2O8 with high thermal stability and low loss
LUO HAO (Autor:in) / FANG WEISHUANG (Autor:in) / TANG YING (Autor:in)
30.12.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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