Glass-free LTCC microwave ceramic-Ca1−x(La0.5Na0.5)xWO4

Microwave dielectric properties and microstructures of (Ca0.8Sr0.2)ZrO3 ceramics prepared by the conventional solid-state route have been studied. The values of the dielectric constant (εr) were 22-26. The Q×f values of 10400–11500 GHz were obtained when the sintering temperatures were in the range of 1400–1490°C. The temperature coefficient of the resonant frequency τf was not sensitive to the sintering temperature. The εr value of 26, the Q×f value of 11500 GHz, and the τf value of-9 ppm/°C were obtained for (Ca0.8Sr0.2)ZrO3 ceramics sintering at 1490°C. The ceramic, (Ca0.8Sr0.2)ZrO3 is proposed as a suitable candidate material for application in highly selective microwave ceramic passive components.

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Study of a compact microwave ceramic coaxial resonator filter

10.47749/t/unicamp.2014.943305 ◽

2014 ◽

Author(s):

Oscar Enrique Llerena Castro

Keyword(s):

Coaxial Resonator ◽

Microwave Ceramic

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Glass-Free Low-Temperature Co-Fired Ceramics Microwave Ceramic AW1−xTexO4 (A=Ca, Sr, Zn)

International Journal of Applied Ceramic Technology ◽

10.1111/j.1744-7402.2011.02611.x ◽

2011 ◽

Vol 8 (6) ◽

pp. 1494-1500 ◽

Cited By ~ 10

Author(s):

Nai Xian Wu ◽

Jian Jiang Bian

Keyword(s):

Low Temperature ◽

Microwave Ceramic

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Preparation and Investigation on Properties of the MgTiO3-CaTiO3 Microwave Ceramic Materials

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.997.419 ◽

2014 ◽

Vol 997 ◽

pp. 419-423 ◽

Cited By ~ 1

Author(s):

Li Dong ◽

Gui Xia Dong ◽

Yuan Yuan Li ◽

Xi Zhang

Keyword(s):

Dielectric Constant ◽

Sintering Temperature ◽

Ceramic Materials ◽

Volume Density ◽

Second Phase ◽

Pressureless Sintering ◽

Solid Reaction ◽

Reaction Method ◽

Microwave Ceramic ◽

Sintering Method

The MgTiO3 and CaTiO3 powders were synthesized by solid reaction method, and MgTiO3-CaTiO3 ceramic was prepared using pressureless sintering method. The experiment prepared MgTiO3-CaTiO3 ceramics with high compactness and stable permittivity by the way of changing the mole ratio of MgTiO3 and CaTiO3 to investigate the effect of CaTiO3 on the performances of MgTiO3-CaTiO3 ceramics. The results show that Mg2TiO4 formed as second phase during sintering. Volume density and dielectric constant of MgTiO3-CaTiO3 ceramics with 10%mol CaTiO3 reach maximum of 3.612g/cm3 and 17.8, respectively, under 1460°C sintering temperature. And for the MgTiO3-CaTiO3 ceramics with 5%mol CaTiO3 the maximum values which are 3.5g/cm3 and 16.6, respectively, appear under 1510°C sintering temperature.

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