Measurements of loss tangent and relative permittivity of LTCC ceramics at varying temperatures and frequencies

Electrical characterisations of plasma polyermised linalyl acetate

“…It is however evident from the analysis that the PF or RS mechanisms are dominating and hence these are considered. In order to differentiate between PF and RS mechanisms, the theoretical and experimental values of β PF and β RS can be compared to see which gives the best agreement [26]. From eqn.…”

“…where f s is the resonant frequency of the SPDR with the substrate only, f f is the resonant frequency of the SPDR with the substrate and deposited film, h f is the thickness of the film and K ε is a function of ε r ' and h f , the value of which is evaluated using the Rayleigh-Ritz technique [26]. Iterative procedures are then used to evaluate further values of K ε and ε r ' until convergence is reached.…”

Structure and Microwave Dielectric Properties of Ultralow‐Temperature Cofirable BaV2O6 Ceramics

“…The microwave dielectric properties were measured by using a Vector Network Analyzer (Agilent make PNA E8362B, Bayan Lepas, Malaysia) in the microwave frequency range. The dielectric constant and the unloaded quality factor of the samples were measured by Hakki-Coleman post-resonator [31] and resonant-cavity methods [32] , respectively. The temperature coefficient of resonant frequency (τ f ) was also measured by noting the variation of the TE 01δ mode frequency with temperature in the range 30-100°C.…”

Microwave dielectric properties of low temperature fired Ba5Nb4O15 ‐ BaWO4 ceramics supplemented with their own nanoparticles for LTCC applications

“…As a result, a large number of dielectric materials have been developed to be used as dielectric resonators, capacitors, substrates, and for electronic packages. 13 In the present work, we developed Ba 5 Nb 4 O 15 -BaWO 4 composite ceramic matrix system with the addition of their own nanoparticles of Ba 5 Nb 4 O 15 and BaWO 4 and studied their effect on sintering temperature on their physical properties such as structural, microstructural, and microwave dielectric properties of the prepared composite ceramics. [1][2][3][4][5][6] There are large number of microwave dielectric materials have been studied for these applications and among them Ba 5 Nb 4 O 15 -BaWO 4 composite ceramics have been studied broadly due to their promising microwave dielectric properties at lower sintering temperatures: e r= 16.9-21, Q9ƒ 0 =49 500-56 700 GHz and s f =8.9 to À4.3 ppm/°C.…”

“…[9][10][11][12] The recent development of LTCC technology is demanding for high frequency wireless communication systems, which is an advanced approach to fabricate the ceramic structures with high speed and high frequency processing devices in the electronic industry. 13 In the present work, we developed Ba 5 Nb 4 O 15 -BaWO 4 composite ceramic matrix system with the addition of their own nanoparticles of Ba 5 Nb 4 O 15 and BaWO 4 and studied their effect on sintering temperature on their physical properties such as structural, microstructural, and microwave dielectric properties of the prepared composite ceramics. However, to the best of the author's knowledge there is no study available on the preparation of nanoparticles of BNO and BWO ceramics and their addition as a sintering aid to BNO -BWO composite ceramics, hence this study.…”