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		题名	作者	年代	出处	被引量
	1	Frequency and temperature dependent electrical characteristics of CaTiO_(3) nano-ceramic prepared by high-energy ball milling显示文摘Nanocrystalline calcium titanate(CT)ceramic has been synthesized by a combination of solid-state reaction and high-energy ball milling.This nano-ceramic is characterized by X-ray diffraction(XRD),dielectric study and impedance spectroscopy.The XRD pattern shows single phase ceramic of orthorhombic symmetry.The frequency-dependent dielectric study shows that the dielectric constant is maximized at low frequencies and decreases with an increase in frequency.Impedance spectroscopy analyses reveal a non-Debye type relaxation phenomenon.A significant shift in impedance loss peaks toward the higher-frequency side indicates conduction in the material favoring the long-range motion of mobile charge carriers.The grain conduction effect is observed from the complex impedance spectrum by the appearance of one semicircular arc in Nyquist plot.It is also observed that the resistance decreases with an increase in temperature showing a negative temperature coefficient of resistance(NTCR).Various thermistor parameters have been calculated by fitting with Steinhart-Hart equation.The modulus plots represent the presence of temperature-dependent electrical relaxation phenomenon with the material.The frequency-dependent AC conductivity at different temperatures indicates that the conduction process is thermally activated.The activation energy has been calculated from an Arrhenius plot of DC conductivity and relaxation frequency.	Subhanarayan SAHOO Umasankar DASH S.K.S.PARASHAR S.M.ALI	2013	Journal of Advanced Ceramics2013，2，3：	6
	2	CaTiO_(3) nano ceramic for NTCR thermistor based sensor application显示文摘It is possible to fabricate highly sensitive NTCR(negative temperature coefficient of resistance)thermistor using nano crystalline CaTiO_(3) synthesized by high energy ball milling.Disc shaped green pellets were prepared and effects of sintering on the disc pellets were studied as thermistor by sintering the samples at 1000℃,1100℃and 1200℃.The as-prepared samples were characterized by X-ray diffraction(XRD),impedance analysis and electrical measurement.The resistivity of the prepared samples varies predictably with temperature:this makes them promising material for temperature sensor.The experimental results prove that nano crystalline CaTiO_(3) ceramic is one kind of thermistor with exponential negative temperature coefficient of resistance in the temperature range of 300-500℃.The samples have the advantages of rapid response,high sensitivity and capability to withstand thermal surges over the temperature range of 300-500℃.Resistance-temperature characteristics are described by thermistor equation with thermistor constant around 4003 K to 10795 K and thermal coefficient of resistanceαaround-1%/℃to-13%/℃.The activation energy is in the range of 0.34-0.93 eV.The observed thermistor parameters are found to be comparable with many of the known thermistor materials.This suggests that the electrical properties can be adjusted to desirable values by controlling the temperature parameter.The influence of fabrication process of disc thermistor and electrical properties are discussed.The study shows the potential of nano crystalline CaTiO_(3) to act as an NTCR material for thermistor applications.	Subhanarayan SAHOO S.K.S.PARASHAR S.M.ALI	2014	Journal of Advanced Ceramics2014，3，2：	1
	3	Establishment of Automated Multi-Range Multipliers Combined with TVC显示文摘自动化多范围 multipliers (范围电阻器)系统被建立因为由使用热电压 converter.It 的 AC 电压大小被选择自动地执行适当更多样地,范围其电压包含电压没有通过新设计 system.It 手工地改变它,被测量,通过控制的一个微控制器由控制部分组成由通过在一个电路的电子继电器的指定准备 LabVIEW 节目和切换的部分作为清楚地	Rasha S.M.Ali M.Helmy A.Raouf	2011	Journal of Measurement Science and Instrumentation2011，2，3：	0

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