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Low-loss stable-temperature ultralow-dielectric-constant microwave dielectric ceramic NdY2V3O12
The invention discloses a low-temperature-sintering low-loss stable-temperature tetragonal-zirconia-structure ultralow-dielectric-constant microwave dielectric ceramic NdY2V3O12 and a preparation method thereof. The preparation method comprises the following steps: (1) weighing and proportioning Nd2O3, Y2O3 and V2O5 original powders with the purity of higher than 99.9 wt% according to the composition of the NdY2V3O12; (2) carrying out wet ball milling mixing on the raw materials in the step (1) for 12 hours by using distilled water as a ball milling medium, drying, and presintering in an 800 DEG C atmospheric atmosphere for 6 hours; and (3) adding an adhesive into the powder prepared in the step (2), granulating, compacting, and finally, sintering in an 850-900 DEG C atmospheric atmosphere for 4 hours, wherein the adhesive adopts a 5 wt% polyvinyl alcohol solution, and the addition amount of the polyvinyl alcohol is 3% of the total mass of the powder. The ceramic has favorable sintering property at 900 DEG C or below, the dielectric constant reaches 9.6-10.3, the quality factor Qf value is up to 161000-193000 GHz, the temperature coefficient of resonance frequency is small, and the ceramic has great application value in industry.
Low-loss stable-temperature ultralow-dielectric-constant microwave dielectric ceramic NdY2V3O12
The invention discloses a low-temperature-sintering low-loss stable-temperature tetragonal-zirconia-structure ultralow-dielectric-constant microwave dielectric ceramic NdY2V3O12 and a preparation method thereof. The preparation method comprises the following steps: (1) weighing and proportioning Nd2O3, Y2O3 and V2O5 original powders with the purity of higher than 99.9 wt% according to the composition of the NdY2V3O12; (2) carrying out wet ball milling mixing on the raw materials in the step (1) for 12 hours by using distilled water as a ball milling medium, drying, and presintering in an 800 DEG C atmospheric atmosphere for 6 hours; and (3) adding an adhesive into the powder prepared in the step (2), granulating, compacting, and finally, sintering in an 850-900 DEG C atmospheric atmosphere for 4 hours, wherein the adhesive adopts a 5 wt% polyvinyl alcohol solution, and the addition amount of the polyvinyl alcohol is 3% of the total mass of the powder. The ceramic has favorable sintering property at 900 DEG C or below, the dielectric constant reaches 9.6-10.3, the quality factor Qf value is up to 161000-193000 GHz, the temperature coefficient of resonance frequency is small, and the ceramic has great application value in industry.
Low-loss stable-temperature ultralow-dielectric-constant microwave dielectric ceramic NdY2V3O12
FANG WEISHUANG (Autor:in) / LI CHUNCHUN (Autor:in) / TANG YING (Autor:in)
18.11.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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