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理想气体压强公式的一种推导方法 总被引:1,自引:1,他引:0
本文从球形容器中理想气体入手,用一种简单易懂且不失一般性的方法,推导出理想气体压强公式。 相似文献
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The 0.6(Bi1-xLax)FeO 3-0.4SrTiO 3(x = 0,0.1) multiferroic ceramics are prepared by a modified Pechini method to study the effect of substitution of SrTiO3 and La in BiFeO3.The X-ray diffraction patterns confirm the single phase characteristics of all the compositions each with a rhombohedral structure.The magnetic properties of the ceramics are significantly improved by a solid solution with SrTiO3 and substitution of La.The values of the dielectric constant ε r and loss tangent tan δ of all the samples decrease with increasing frequency and become constant at room temperature.The La-doped 0.6BiFeO3-0.4SrTiO3 ceramics exhibit improved dielectric and ferroelectric properties,with higher dielectric constant enhanced remnant polarization(Pr) and lower leakage current at room temperature.Compared with a anti-ferromagnetic BiFeO3 compound,the 0.6(Bi0.9La0.1)FeO3-0.4SrTiO3 sample shows the optimal ferromagnetism with remnant magnetization M r ~ 0.135 emμ/g and ferroelectricity with Pr ~ 5.94 μC/cm 2 at room temperature. 相似文献
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Improved multiferroic properties of La-doped 0.6BiFeO<sub>3</sub>-0.4SrTiO<sub>3</sub> solid solution ceramics
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The 0.6(Bi1-xLax)FeO 3-0.4SrTiO 3(x = 0,0.1) multiferroic ceramics are prepared by a modified Pechini method to study the effect of substitution of SrTiO3 and La in BiFeO3.The X-ray diffraction patterns confirm the single phase characteristics of all the compositions each with a rhombohedral structure.The magnetic properties of the ceramics are significantly improved by a solid solution with SrTiO3 and substitution of La.The values of the dielectric constant ε r and loss tangent tan δ of all the samples decrease with increasing frequency and become constant at room temperature.The La-doped 0.6BiFeO3-0.4SrTiO3 ceramics exhibit improved dielectric and ferroelectric properties,with higher dielectric constant enhanced remnant polarization(Pr) and lower leakage current at room temperature.Compared with a anti-ferromagnetic BiFeO3 compound,the 0.6(Bi0.9La0.1)FeO3-0.4SrTiO3 sample shows the optimal ferromagnetism with remnant magnetization M r ~ 0.135 emμ/g and ferroelectricity with Pr ~ 5.94 μC/cm 2 at room temperature. 相似文献
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利用电场能量和电容器的能量公式,解出非平行板电容器的电容和电场分布.该方法严谨易懂,图像清晰,另辟新径. 相似文献
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利用载流线圈的费曼模型,根据截面为圆形的无限长载流螺线管的磁场分布和场叠加原理,求出截面为任意形状的无限长载流螺线管的磁场分布. 相似文献
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本文对在一条波线上的两个驻波的叠加结果进行了简明扼要的分析,对进一步理解行波和驻波之间的相互关系有积极的意义。 相似文献
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电子漂移速度的几种计算方法及其比较 总被引:1,自引:0,他引:1
根据经典电子论分别采用三种不同的方法:算术平均法、统计平均法和电子动力学方程法解出金属中电子的平均漂移速度,并且对三种方法所得到的不同结果进行了比较分析. 相似文献
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