The dielectric property of organic reagent is key to the study of Microwave-assisatant organic synthesization.The data of complex permittivity of these organic reagents can not be obtained easy.The complex permittvity...The dielectric property of organic reagent is key to the study of Microwave-assisatant organic synthesization.The data of complex permittivity of these organic reagents can not be obtained easy.The complex permittvity of these organic regents were measured in 2.45 GHz by cavity perturbation method.The result shows that the real and imaginary parts of the permittivity of alcohol are larger than others.The real part of the complex permittivity of ketone is larger and the imaginary part is smaller.The real and imaginary parts of the permittivity of acid are smaller.The real and imaginary parts of the permittivity of alkyl and benzene are the smallest.The real part and the imaginary parts of the permittivity of all decrease while the increasing of the number of carbon’s chain.The analysis and the measurement offer high helps in the microwave assistant organic synthesization.展开更多
为研究发光等离子体对高功率微波的防护性能,建立了一维条件下等离子体与高功率微波相互作用的物理模型,并采用数值仿真得到了不同条件下的微波透射效果,分析了发光等离子体对高功率微波的防护性能。随后,实验研究了双层柱状等离子体阵...为研究发光等离子体对高功率微波的防护性能,建立了一维条件下等离子体与高功率微波相互作用的物理模型,并采用数值仿真得到了不同条件下的微波透射效果,分析了发光等离子体对高功率微波的防护性能。随后,实验研究了双层柱状等离子体阵列对6 GHz高功率微波脉冲的透射效果,实验结果与仿真结果相符,说明高功率微波的入射使等离子体产生了非线性效应。实验结果还表明,TE极化时的防护效果要优于TM极化时的防护效果;等离子体击穿场强阈值随电场作用空间的增大而减小;TE极化时等离子体对高功率微波脉冲的屏蔽效能最高可达13 d B,且随入射功率的增大而进一步增大。展开更多
文摘The dielectric property of organic reagent is key to the study of Microwave-assisatant organic synthesization.The data of complex permittivity of these organic reagents can not be obtained easy.The complex permittvity of these organic regents were measured in 2.45 GHz by cavity perturbation method.The result shows that the real and imaginary parts of the permittivity of alcohol are larger than others.The real part of the complex permittivity of ketone is larger and the imaginary part is smaller.The real and imaginary parts of the permittivity of acid are smaller.The real and imaginary parts of the permittivity of alkyl and benzene are the smallest.The real part and the imaginary parts of the permittivity of all decrease while the increasing of the number of carbon’s chain.The analysis and the measurement offer high helps in the microwave assistant organic synthesization.
文摘为研究发光等离子体对高功率微波的防护性能,建立了一维条件下等离子体与高功率微波相互作用的物理模型,并采用数值仿真得到了不同条件下的微波透射效果,分析了发光等离子体对高功率微波的防护性能。随后,实验研究了双层柱状等离子体阵列对6 GHz高功率微波脉冲的透射效果,实验结果与仿真结果相符,说明高功率微波的入射使等离子体产生了非线性效应。实验结果还表明,TE极化时的防护效果要优于TM极化时的防护效果;等离子体击穿场强阈值随电场作用空间的增大而减小;TE极化时等离子体对高功率微波脉冲的屏蔽效能最高可达13 d B,且随入射功率的增大而进一步增大。
基金the National Natural Science Foundation of China(1100-1050)the Key Scientifie Research Fund of Hunan Provincial Education Department,China(09A013)+1 种基金the Scientific Research Fund of Hunan Provincial Education Department, China(10B013)the Science and Technology Research Foundation of Hunan Province,China(2010FJ4120)
