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1)  dielectric dissipation loss factor
介电损耗因子
1.
The experimental results show that the piezoelectric charge constant(d33),relative dielectric constant(εr) and dielectric dissipation loss factor(tanδ) decrease dramatically with increasing amount of doped Co2O3 in a rang from 0 to 0.
4%,介电损耗因子tanδ大幅降低,同时压电常数d33和介电常数εr降低。
2)  dielectric constant ε
介电损耗因数
1.
At low temperature,dielectric constant ε(ε' ,ε'' ),dielectric loss tangent tgδis small at ω<104Hz or ω> Hz.
用2801西林电桥研究了0℃~160℃聚丙烯腈(PAN)碳纤维的介电损耗因数ε、介质损耗角正切tgδ的频率特性;用微电导测试仪研究了温度、电场对PAN碳纤维的电导率γ的影响。
3)  dielectric loss
介电损耗
1.
Progress in dielectric loss of microwave dielectric ceramics;
微波介质陶瓷的介电损耗研究进展
2.
The Study on Microwave Dielectric Loss of Al_2O_3 Ceramics Modified by Y_2O_3;
Y_2O_3改性Al_2O_3陶瓷微波介电损耗研究
3.
Research on the ordering and dielectric loss in A(B′B″)O_3 complex perovskite
A(B′B″)O_3型钙钛矿材料中有序结构与介电损耗的研究
4)  dielectric loss factor and capacitance
介质损耗因数及电容量
1.
This paper described the process for solving the problem of un-qualified data of dielectric loss factor and capacitance in end screen of neutral bushing to ground during the overhaul of phase A,No.
文章记述了在方正500kV变电站2号变A相变压器大修过程中如何解决中性点套管末屏对地的介质损耗因数及电容量数据不合格问题的过程。
5)  loss factor
介电损失因子
1.
Methods The AC impedance of rat sural muscle tissues was measured using the Agilent 4294A impedance analyzer, then the electrophysiological properties of the normal rat sural muscle cells were established in the respect of cell dielectric spectroscopy, Cole-Cole plots, spectrum of loss factor and loss tangent.
方法:使用Agilent4294A阻抗分析仪测量大鼠腓肠肌组织的交流阻抗,通过细胞介电谱、Cole-Cole图、介电损失因子△ε″和介电损耗角正切△tgδ的频谱分析,建立了正常大鼠腓肠肌细胞的频域电生理特性参数(介电参数)。
6)  loss factor
损耗因子
1.
Relation between acoustical absorption coefficient and loss factor in reverberant field with statistical energy analysis(SEA);
统计能量分析混响声场中吸声系数与损耗因子关系研究
2.
Calculation of frequency and loss factor of composite sandwich structures;
复合夹层结构频率及损耗因子的计算
3.
The effects of additional magnets on the loss factor of a smart magnetic partially constrained layers clamped-clamped beam;
附加磁体对局部约束阻尼固支梁损耗因子的影响
补充资料:介电损耗角正切
分子式:
CAS号:

性质:又称介质损耗角正切,介电损耗角正切。表征电介质材料在施加电场后介质损耗大小的物理量,以tgδ表示,δ是介电损耗角。它表征每个周期内介质损耗的能量与其贮存能量之比。高分子材料多系绝缘性好的材料,广泛的用于电子及电工行业。使用时不希望绝缘材料本身能量损耗大,因而测量出介质损耗因数就能评价材料的介质本身能量损耗。工业上多选用介质损耗因数小的高分子材料作为绝缘材料。通常极性橡胶的tanδ比非极性橡胶的大。它还与试验采用的频率、温度紧密相关。在一定温度下,只有在某一频率范围内,分子偶极取向虽可追随电场变化,但不完全同步,有部分电能被吸收而发热,tanδ出现最大值。同样在一定频率下,惟有某一温度区域内tanδ才会出现极大值,当频率升高时,介质损耗峰移向高温端。 

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