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Dielectric ceramics of 0.95MgTiO3−0.05CaTiO3 were prepared via a solid-state reaction method. It is evident that high permittivity and low loss are correlated to high density and high purity in the THz frequency domain. Best dielectric properties were obtained for samples sintered at 1260°C, which is attributable to their high density and high purity. However, the dielectric properties of the ceramics...
In this paper, green microfibers of barium titanate precursor were prepared by the combination of Sol-Gel processing and Gel-spinning technique. The piezoelectric microfibers of ceramic BaTiO3 were sintered, with diameter of 15μm and length of 20mm, respectively. Interdigitated electrodes were printed on an epoxy resin substrate. BaTiO3 microfibers were then aligned on the interdigitated electrodes...
The composites of CaCu3Ti4O12-x(NaBi)0.5Cu3Ti4O12, i.e. CCTO-xNBCTO, were prepared for x value from 0 to 0.1. Ultrahigh dielectric constant, ε =7×105, and dielectric loss, tanδ = 0.48, of the composites with x=0.05 were obtained. The relations between crystal structures with XRD spectra and dielectric properties with LCR measurement were investigated, in which. An internal barrier layer capacitance...
A series of Ce3+, Mn2+ codoped BaxSryLizSiO4:Ce3+, Mn2+ phosphors were synthesized by partially liquid-phase method. The effects of Ba/Sr ratio, Ce/Mn ratio and lithium content on the emission spectra of the BaxSryLizSiO4:Ce3+, Mn2+ (BSLS:Ce, Mn) phosphors were investigated in details, which showed blue emission around 410nm wavelength and red emission at about 620nm wavelength, respectively. With...
An optical glucose biosensor was fabricated by encapsulating glucose oxidase in TEOS-derived gel film along with Ru(bpy)3Cl2 as an luminescent oxygen transducer, for determining the concentration of glucose in the blood and urine samples. When the oxidation reaction of glucose by glucose oxidase occurred, an increase in the fluorescence intensity of Ru(bpy)3Cl2 was observed due to the oxygen consumption...
A new kind of machinable composite plate was developed for microwave antenna in this paper, in which ceramic powder of CaO-Li2O-Ln2O3-TiO2 was mixed with PTFE polymer in different proportions. It was showed that the permittivity of the composite plate was enhanced from 4 to 15 with the increasing content of ceramic powder; meanwhile, the quality factor was maintained at 1000GHz. The antenna was obtained...
A conversion was facilitated with magneto-electric effect between energies stored in ferromagnetic form and piezoelectric one in material. This paper is concerned with magneto-electric performance of composites with a bi-layered structure for ceramic (Na0.5K0.45Li0.05)(Nb0.9Ta0.08Sb0.02)O3, i.e., KNN, and metal nickel. Lead-free piezoelectric KNN ceramics were synthesized by the two-step sintering...
Based on the preliminary investigation and focused on the corona poling technology for modified PMMA films, some practical and operable way are proposed to enhance the poling efficiency and the second-order nonlinear optical effect of the films. For universal uneven distributions of the polarization field in traditional single-pin corona poled systems, a novel multi-pin corona poling structure is...
Aimed at corona poling of PMMA-based modified polymer films, we deduced optimized polarization conditions and a new practical and effective way to improve the polarization efficiency. First of all, the influence of DR1-dopant in host-guest way on the optical loss of PMMA/DR1 polymer films, prepared by sol-gel method combining with spin coating, was analyzed. Then through a series of single-pin corona...
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