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Ultralow-dielectric-constant microwave dielectric ceramic Li3Si2B3O10 and preparation method thereof
The invention discloses a temperature-stable ultralow-dielectric-constant microwave dielectric ceramic Li3Si2B3O10 and a preparation method thereof. The preparation method comprises the following steps: (1) weighing and batching the original powder of Li2CO3, SiO2 and H3BO3 which have the purities of over 99.9 percent according to the composition of Li3Si2B3O10; (2) performing wet ball mill and mixing on raw materials in the step (1) for 12 hours, wherein the ball milling medium refers to absolute ethyl alcohol, drying, and presintering in an air atmosphere at the temperature of 750 DEG C for 6 hours; and (3) adding an adhesive into the powder prepared in the step (2), granulating, pressing, forming, and finally sintering in the air atmosphere at the temperature of 800 to 850 DEG C for 4 hours, wherein the adhesive adopts 5 mass percent of polyvinyl alcohol solution, and the addition amount of the polyvinyl alcohol accounts for 3 percent of the total mass of the powder. The ceramic prepared by the invention is good in sintering property, the dielectric constant reaches 5.3 to 5.8, the quality factor Qf value is 113000GHz to 149000GHz, the resonant frequency temperature coefficient is small, and the ceramic has extremely high application value in the industry.
Ultralow-dielectric-constant microwave dielectric ceramic Li3Si2B3O10 and preparation method thereof
The invention discloses a temperature-stable ultralow-dielectric-constant microwave dielectric ceramic Li3Si2B3O10 and a preparation method thereof. The preparation method comprises the following steps: (1) weighing and batching the original powder of Li2CO3, SiO2 and H3BO3 which have the purities of over 99.9 percent according to the composition of Li3Si2B3O10; (2) performing wet ball mill and mixing on raw materials in the step (1) for 12 hours, wherein the ball milling medium refers to absolute ethyl alcohol, drying, and presintering in an air atmosphere at the temperature of 750 DEG C for 6 hours; and (3) adding an adhesive into the powder prepared in the step (2), granulating, pressing, forming, and finally sintering in the air atmosphere at the temperature of 800 to 850 DEG C for 4 hours, wherein the adhesive adopts 5 mass percent of polyvinyl alcohol solution, and the addition amount of the polyvinyl alcohol accounts for 3 percent of the total mass of the powder. The ceramic prepared by the invention is good in sintering property, the dielectric constant reaches 5.3 to 5.8, the quality factor Qf value is 113000GHz to 149000GHz, the resonant frequency temperature coefficient is small, and the ceramic has extremely high application value in the industry.
Ultralow-dielectric-constant microwave dielectric ceramic Li3Si2B3O10 and preparation method thereof
JIANG XUEWEN (Autor:in) / LI CHUNCHUN (Autor:in) / SU HEPING (Autor:in)
01.04.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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