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Article ID: 1003-6326(2005)02-0252-05 Optimization of dielectric constant temperature coefficient of pyrochlores containing bismuth REN Qing-li(任庆利)1, 2, LUO Qiang(罗 强)3, CHEN Shou-tian(陈... performed on the crystal structures and improving dielectric properties, especially enhancing permittivity and reducing dielectric loss. However, the optimization of dielectric constant temperature......
was measured in a frequency range from 100 Hz to 1 MHz using an HP4294A precision impedance analyzer. For all the samples studied, the dielectric constant and dielectric loss decreases with increasing... studied, which is in direct contrast with that reported previously. It is found that both dielectric constant and dielectric loss are strongly dependent on the Gd3+ content. The effect of introducing Gd3......
and sintering time. The impedance spectrum measurement results show that both the dielectric constant and dielectric loss have a weak frequency dependence over large frequency region of 50 Hz to 100 kHz, and not only does the dielectric loss decrease but also the dielectric constant remains high sufficiently. The most suitable sintering time is 6 h.Key words:CaCu3Ti4O12 ceramics; dielectric constant......
Fabrication of BaTiO3/Epoxy Composites Exhibiting Large Dielectric Constant, Low Dielectric Loss and High Flexural Strength刘金鹏,YOU Xiaoqiang,陈楠,杜国平School of Materials Science and Engineering... approach. The BaTiO3/epoxy composites exhibit a colossal dielectric constant, low dielectric loss and high flexural strength. In the BaTiO3 networks, chemically bonded grain boundaries between......
films decreased with increasing amount of Dy2O3. The relative dielectric constant and dielectric loss of the BSCT thick film doped Dy2O3 0. 1mol% were 4637.4 and 1.6% at 1kHz, respectively. 关键词:ferroelectric; dielectric constant; thick film; screen-printing; [全文内容正在添加中] ......
material, the dielectric constant and dielectric loss tangent of three samples reveal lower values. Key words: Si/C/B powder; β-SiC; carbothermal reduction; sol–gel; dielectric constant; dielectric loss... with the result of Ref.[12]. 3.3 Dielectric properties Fig.4 shows the real part of dielectric constant (ε′) and dielectric loss tangent (tanδ) of the samples in the microwave frequency range from......
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for transmission peaks is obtained if the imaginary part of dielectric constant is negative.With the increase of the absolute value of the imaginary part,the transmission gain increases firstly and the transmittance gain gets to an apex.The imaginary parts of dielectric constant corresponding to transmission gain apex are different according to wavelength.However,the transmission ratio of resonance......
dielectric constant measurements indicate that the real part and the imaginary part increase greatly with the Ni content in the frequency range of 8.2-12.4 GHz. The real part and the imaginary part.... The responses of the space charges to foreign electromagnetic field increase the dielectric constant. The imaginary part (ε″) of permittivity is given by the following equation as: ε? = δdc/(ωεo)+ε?ac......
the quality factor Q*f value as well as the temperature coefficient of resonant frequency τf and decrease the dielectric constant εr. With increase of La3+ contents, the dielectric constant decreases from 57...Effect of La2O3-Dopant on Microstructure and Microwave Dielectric Properties of CaO-MgO-Nb2O5-TiO2 System Ceramics Liu Tao1,Chen Wen1,Wang Hao1 (1.Institute of Materials Science and Engineering......
