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Dielectric Properties of Na2O Doped Cao-B2O3-SiO2 System Glass-Ceramics

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Abstract:

The behavior of dielectric and microwave properties against sintering temperature was been carried out on CaO-B2O3-SiO2 glass-ceramics with Na2O addition by XRD and SEM. The results show that 0.5 wt.% Na2O addition is advantageous to improve the dielectric and microwave properties due to increasing the major crystalline CaSiO3. With further increasing Na2O content, α-SiO2 is the predominant crystalline phase instead of CaSiO3. The CBS glass-ceramics with 0.5 wt.% Na2O sintered at 875°C has a bulk density of 2.51g·cm-3, and which possesses good dielectric properties: εr =6.2, tanδ=1.9×10-3(10 MHz) and low dielectric constant below 2×10-3 over a wide frequency range. The proposed dielectrics can find applications in microwave devices, which require low dielectric loss and low dielectric constant.

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Periodical:

Advanced Materials Research (Volumes 750-752)

Pages:

492-496

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.750-752.492

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Online since:

August 2013

Authors:

Peng Fei Wei

Keywords:

CaO-B2O3-SiO2, Dielectric Property, Na2O Addition, Sintering

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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