介电损耗角正切

当质子辐照剂量大于1015cm-2后，体积电阻率及交流击穿电压下降，介电常数及介电损耗角正切上升。

After the irradiation dosage more than 10 ~ ( 15 ) cm ~ ( - 2 ), the alternating breakdown voltage and bulk resistivity decreased , but the dielectric constant and the dielectric loss angle tangent increased .

研究发现，当质子辐照剂量小于1015cm-2时，交流击穿电压上升，体积电阻率、介电常数及介电损耗角正切无明显变化。

Experimental results showed that under the proton irradiation dosage less than 10 ~ ( 15 ) cm ~ ( - 2 ), the alternating breakdown voltage increased , but the bulk resistivity , the dielectric constant and the dielectric loss angle tangent changed a little .

与聚苯胺相比，镍铁氧体/聚苯胺复合材料的介电损耗角正切tanδε值与磁损耗角正切tanδm值都增大。

Dielectric loss tangent and magnetic loss tangent of the nickel ferrite / polyaniline composites are higher than those of the polyaniline .

总体来看，介电损耗角正切值也有随着碳化温度升高而增大的变化趋势。

In general , the dielectric loss also had rising trend as carbonizing temperature increased .

报导了近十年来微波技术在介电损耗角正切大，即（εs&ε∞）高的一类聚合物加工中的应用概况。

The application of microwave to polymers . which have high dielectric loss tangent ( high ε s ~ε ∞) in the last ten years is reviewed in this paper .

以相对介电常数和损耗角正切为输入特征参数，应用BP神经网络技术识别桃的新鲜度等级，平均识别率为82%。

Furthermore , BP neural network technology was used to identify freshness of peaches when relative dielectric constant and loss tangent were selected as input characteristic parameters . Results showed the average distinguishing rate was 82 % .

介绍了利用微带电路来确定一组高性能、高频印刷电路板材料的介电常数和损耗角正切的方法，且给出了一组印刷电路板材料的特性测量值。

The paper introduces measurements about dielectric constant and tangential loss angle of a group of good function and high frequency printed electronic circuit plate with microstrip circuit .

在室温条件下，猕猴桃的相对介电常数和损耗角正切随温度的增大而增大，电阻率随温度的增大而减小。

At the usual temperature , the relative dielectric peculiarity parameters and loss tangent increase with the temperature 's increase , while the resistance will decrease with the temperature 's increase .

不均匀介质相对介电常数和介质损耗角正切的计算

Calculation for Relative Dielectric Constant and Dielectric Loss Tangent of Heterogeneous Dielectric

GB/T1693-1981硫化橡胶工频介电常数和介质损耗角正切值的测定方法

Vulcanized rubber & Determination for industrial frequency dielectric constant and dielectric loss angular tangent value

研究了SiC（N）纳米粉体的介电常数和介电损耗角正切与粉体组成的关系。

The microwave permittivity of the mixture of the SiC ( N ) nano powder with paraffin wax was measured .

相应地，对表征其介电特性的参数如介电常数ε、损耗角正切tanδ等的测试技术研究也日益受到人们的重视。

Accordingly , test technology on the characterization of their dielectric property parameters such as dielectric constant , dissipation factor has also been paid increasing attention .

介绍一种高损耗介电材料的介电参数（介电常数、介质损耗角正切、交流电导率）测量的新方法及其原理。

This paper presents a new method to measure the dielectric parameters of high-loss dielectrics ( dielectric constant , dielectric dissipation factor , AC conductivity ) and its principle .

研究表明，二氧化锰属于一种介电损耗介质，具有较高的电阻率和较大的介电常数，而且其介电损耗角正切随频率的增加变化不大。

Results show that MnO_2 is a kind of dielectric loss medium , and it has high electric resistivity and dielectric constants .