1)  Dielectric loss tangent
介电损耗正切
2)  dielectric
介电
1.
Design parameters of dielectric seed separators;
介电式种子分选机设计参数的研究
2.
Electric field of dielectric seed separator;
介电式种子分选机电磁场的研究
3.
Study on ferroelectric and dielectric properties of W-doped CaBi_4Ti_4O_(15)-based ceramics;
钨掺杂CaBi_4Ti_4O_(15)基陶瓷的介电和铁电性能研究
3)  dielectrics
介电
4)  permittivity
介电常数
1.
Study on Permittivity and Permeability of Carbon Nanotubes in the Low-frequency Band from 0.5 to 6 GHz;
碳纳米管在0.5~6GHz低频波段的介电常数和磁导率研究
2.
Measurement of microwave permittivity of high-loss materials using coaxial transmission and reflection way;
同轴传输反射法测量高损耗材料微波介电常数
3.
Effect of purification on 2～18GHz complex permittivity and complex permeability of carbon nanotubes;
纯化处理对碳纳米管2～18GHz复介电常数与复磁导率的影响
5)  dielectric properties
介电性能
1.
The sintering behavior and microwave dielectric properties of Mg_4(Ta_(1-x)V_x)_2O_9 ceramics;
Mg_4(Ta_(1-x)V_x)_2O_9陶瓷的烧结特性和微波介电性能
2.
Effect of doped Mg~(2+) and Mn~(2+) on the dielectric properties of BaTiO_3-metal composite system;
Mg~(2+)和Mn~(2+)掺杂对BaTiO_3-金属复合系介电性能的影响
3.
Preparation of Cd-doped BZCN thin film and its dielectric properties;
Cd掺杂BZCN薄膜的制备及其介电性能
6)  dielectric property
介电性能
1.
Temperature and dielectric property of resin during RTM process;
RTM工艺中树脂固化温度与介电性能
2.
Correlations between dielectric property and modulated structure in the (Ta_2O_5)_(0.92)(TiO_2)_(0.08) system;
Ta_2O_5-TiO_2调制结构和介电性能相关性
3.
Effects of nickel addition on the microstructure and dielectric property of barium titanate powder and ceramic with excessive Ti;
掺镍对钛过量钛酸钡粉体及其陶瓷的结构及介电性能的影响
参考词条
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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