Authors: Long Tu Li, Tian Wang, Xiao Hui Wang, Jing Chang Zhao, Xian Li
Abstract: Dielectric characteristics of strontium titanate based ceramics doped with samarium were
investigated within temperature range from –60oC to 150oC. XRD was used to identify the phase
compositions of the ceramics and the microstructures were characterized by SEM. Good temperature
coefficient of capacitance (TCC) was observed: TCC = +18% ~ −11% with high dielectric constant of
18000 and relative low dielectric loss. After further modification, the present ceramics might be
promising candidates for the multilayer ceramic capacitors applications at high temperature.
Authors: Rong Xia Huang, Yu Zhen Zhao, Yong Jie Zhao, Rong Zheng Liu, He Ping Zhou
Abstract: Lead-free K0.5Na0.5NbO3-xwt% (0.4ZnO-0.6B2O3) ceramics were synthesized by conventional ceramics process. The co-doping of ZnO and B2O3 can decrease the sintering temperature of K0.5Na0.5NbO3 ceramics to 1000°C, and the samples show high relative density around 96%. X-ray diffraction (XRD) reveals that Co-doping of ZnO and B2O3 induces lattice distortion. Liquid phase is observed by scanning electron microscopy (SEM), which is resulted from the addition of ZnO and B2O3. The ceramics show better piezoelectric and dielectric properties with planar electromechanical coupling factor kp= 40.7%, piezoelectric constant d33=117pC/N, dielectric constant εT33/ε0=318.6, and loss tangenttanδ=0.034.
Authors: Dong Dong Huang, Qiu Hong Yang, Yong Gang Wang, Hao Jia Zhang
Abstract: Highly transparent (Ho0.01La0.10Y0.89)2O3 transparent ceramics were fabricated by the conventional ceramics processing with nanopowders. The microstructure, the optical properties and the spectroscopic properties of (Ho0.01La0.10Y0.89)2O3 ceramics were investigated. (Ho0.01La0.10Y0.89)2O3 ceramics with the grain size of ~50 μm were obtained by sintering at 1530 °C for 45 h. The highest in-line transmittance reaches 65%. The emission peak located at 2 μm wavelength indicates (Ho0.01La0.10Y0.89)2O3 transparent ceramics is suitable for 2 μm laser gain medium.
Authors: Yun Yun Xu, Xin Nian Li, Shan Dan Zhou, Tao Zhang, Zheng Ming Li
Abstract: Inorganic non-metallic materials are indispensable and fundamental materials to develop modern industry, agriculture, national defense and science and technology. With the recovery and development of global economy, inorganic non-metallic materials come close to important program opportunity. This paper reviewed recent development on inorganic non-metallic materials technology and industry and analyzed development trend, aimed at providing references for development on inorganic non-metallic technology and industry in Jiangxi province.