【摘 要】
：
The effect of SiO2 doping on the sintering behavior,microstructure,and dielectric properties of BaTiO3-based ceramics has been investigated.Silica was added to
【机 构】
：
Department of Material Engineering,Electronic Ceramics Research Center
论文部分内容阅读
The effect of SiO2 doping on the sintering behavior,microstructure,and dielectric properties of BaTiO3-based ceramics has been investigated.Silica was added to the BaTiO3-based powder prepared by the solid state method with 0.075mo1%,0.15mo1%,and 0.3mo1%,respectively.The SiO2-doped BaTiO3-based ceramic with high density and uniform grain size were obtained,which were sintered in reducing atmosphere.A scanning electron microscope,X-ray diffraction,and LCR meter were used to determine the microstructure as well as the dielectric properties.SiO2 can form a liquid phase belonging to the ternary system of BaO-TiO2-SiO2,leading to the formation of BaTiO3 ceramics with high density at a lower sintering temperature.The SiO2-doped BaTiO3-based ce-ramics can be sintered to a theoretical density higher than 95% at 1220℃ with a soaking time of 2 h.The dielectric constants of the sample with 0.15mo1% SiO2 addition sintered at 1220℃ is about 9000.Doping with a small amount of silica can improve the sinter-ing and dielectric properties of BaTiO3-based ceramics.
其他文献
The effect ofyttria on the solid reaction mechanism ofa CaHPO4·2H2O + CaCO3 system at different temperatures was experimentally stud-ied. The samples with and
Due to the mutual interference and sharing of wireless links in TDMA wireless sensor networks, conflicts will occur when data messages are transmitting between
To improve performance of a support vector regression, a new method for a modified kernel function is proposed. In this method, information of all samples is in
The effects of alloying elements in welding wires and submerged arc welding process on the microstructures and low-temperature impact toughness of weld metals h
针对小波变换方法的不足,运用EMD方法对黄河兰州以上二级水资源分区45年(1956- 2000年)的年降雨量序列进行多时间尺度分析,发现该区域年降雨量存在准3年、准4-8年、准11年波
A newly developed low-alloy weathering steel has been exposed in two coastal sites (Qingdao in the north,Wanning in the south) in China for one year.The samples
The memory state feedback control problem for a class of discrete-time systems with input delay and unknown state delay is addressed based on LMIs and Lyapunov-
生产性服务业的发展及其对经济增长和结构调整的作用一直是学术界关注的热点.以近年江苏投入产出表为基础,结合同期制造业、消费者服务业和公共服务业的发展,对江苏生产性服
Single cold rolling and double cold rolling were applied to hot rolled strips with different reduction ratios.The evolutions of { 100},{ 111 } and Goss face tex
An improvement of tolerance relation is proposed in regard to rough set model based on connection degree by which reflexivity of relation can be assured without