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ntc效应     
相关语句
  ntc effect
     The NTC Effect of PZT/Y_(0.9)Ca_(0.1)Ba_2Cu_4O_8 and Ag_2O-Doped Composites
     PZT/Y_(0.9)Ca_(0.1)Ba_2Cu_4O_8及Ag_2O掺杂的复合氧化物陶瓷的NTC效应
短句来源
     ·cm, PTC intensity of 4.7 orders of magnitude, and middle NTC effect.
     ·cm,PTC强度为4.7个数量级,但出现中等程度NTC效应
短句来源
     When EVA content less than 27. 4wt%, the room temperature resistivity of composite material is less than 2. 4 Ω·m, the PTC intensity is larger than 7. 1, the NTC effect is less than 0. 5;
     当EVA的质量含量<27.4%时,复合材料的室温电阻率<2.4Ω·m,PTC强度>7.1,NTC效应<0.5。
     SiO_2 or ZrO_2-added samples have obvious NTC-PTC composite effects. Small addition of PbO helps to decrease ρ25 and the NTC effect.
     其中,SiO_2或 ZrO_2增强了居里点以下的 NTC 效应,降阻比可达 1个数量级;
短句来源
     NTC effect of PVDF/CB compound can be weakened by γ60Co irradiation, but cannot be eliminated completely during irradiating below 40 Mrad.
     并用DSC测试结果解释了这一现象,40Mrad以下剂量γ-60Co辐照能削弱NTC效应,但不能完全消除。
短句来源
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  effect of ntc
     Radiation crosslinking can increase the intensity of PE/PAS composites, decrease the effect of NTC and hence the stability of composites.
     辐射交联可以降低聚乙烯/聚并苯复合物室温电阻率,提高聚乙烯/聚并苯复合物PTC效应,减小NTC效应,增强复合物的稳定性。
短句来源
  ntc effects
     PTC/NTC Effects of Composite Conductive Polymeric Materials
     复合型导电高分子材料PTC/NTC效应的研究
短句来源
     An Exploration for the Mechanism of PTC/NTC Effects of LDPE/Carbon Black Electrical Conductive Composites
     LDPE/炭黑复合导电材料PTC/NTC效应形成机理的探讨
短句来源
     A series of tests about temperature-resistance sensitivity characters proved that the carbon fiber reinforced resin composites shown the PTC or NTC effects. The inner effect factors of the temperature-resistance sensitivity of the carbon fiber reinforced resin composites were analysed and discussed.
     通过一系列温度-电阻实验,证明碳纤维树脂基础复合材料具有PTC效应或NTC效应,并分析和探讨了影响碳纤维树脂基复合材料温度-电阻变化的内在因素。
短句来源
     This paper proposes a new mechanism of PTC/NTC effects of LDPE/Carbon black electrical conductive composites, based on the study of crystallization properties of composites. It shows that PTC effect is mainly caused by thetransition of crystalline phase to amorphous phase and the thermal expansionduring polymer melting, NTC effect is related to the agglomeration effect ofcarbon black particles.
     本文从LDPE/炭黑复合导电材料的结晶性能出发,探讨了复合材料电阻率的正温度系数(PashiveTemperatareCoefficient,简称PTC)效应和负温度系数(NTC)效应的形成机理,认为PTC效应是由聚合物熔融时发生的晶相向非晶相的转变以及由此而产生的热膨胀共同引起,NTC效应主要与炭黑粒子的附聚效应有关。
短句来源
  ntc phenomena
     PTC/NTC Phenomena of CB/HDPE Conductive Composite
     炭黑/HDPE复合导电材料的PTC/NTC效应
短句来源

 

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      ntc effect
    Furthermore, in the limited literature, the resistance-temperature curve of the material expressed a negative temperature coefficient (NTC) effect when metal was present.
          


    The relation between the resistance and temperature of carbon black filled polymers is introduced. Under special conditions,materials with a negative temperature coefficient(NTC) and with a positive temperature coefficient(PTC)are mainly observed.According to the conductive mechanism of carbon black filled polymers,materials may show an extremely high posi-tive temperature coefficient(H-PTC)when the black concentration is in the critical range orwhen crystalline polymers are in a narrow melting range. However,...

    The relation between the resistance and temperature of carbon black filled polymers is introduced. Under special conditions,materials with a negative temperature coefficient(NTC) and with a positive temperature coefficient(PTC)are mainly observed.According to the conductive mechanism of carbon black filled polymers,materials may show an extremely high posi-tive temperature coefficient(H-PTC)when the black concentration is in the critical range orwhen crystalline polymers are in a narrow melting range. However, NTC effect could beproduced when the black concentration is very high.These are the theoretical basis for exploringnew functional conductive materials——thermogenesis plastics controlled by temperature.

    研究炭黑填充的聚合物电阻率与温度之间的关系表明,当炭黑浓度在临界区域或晶质聚合物在较窄的熔化区域,材料都能呈显高的正温系数(H-PTC)效应;而炭黑浓度很大时,具有负温系数(NTC)效应。这些是探索新型功能导电材料——温度自控塑料发热体的理论基础。

    The preparation and the electrical conduction mechanism of(Sr,Pb)TiO_3 material with V-type resistivity-temperature characteristics are investigated in this paper.The positive temperature coefficient effect ofthis material originates from the penetration of oxygen in grain boundaries,mealwhile the negative temperaturecoefficient effect is due to the high formation energy of the carriers and the high activation energy of their diffu sion.

    本文研究了(Sr,Pb)TiO_3系V型PTC材料的制备及导电机理。指出该材料的PTC效应仍起源于受主态在晶界形成的势垒,其强烈的NTC效应则是由于载流子的生成能和迁移激活能较大所引起。

    This paper proposes a new mechanism of PTC/NTC effects of LDPE/Carbon black electrical conductive composites, based on the study of crystallization properties of composites. It shows that PTC effect is mainly caused by thetransition of crystalline phase to amorphous phase and the thermal expansionduring polymer melting, NTC effect is related to the agglomeration effect ofcarbon black particles.

    本文从LDPE/炭黑复合导电材料的结晶性能出发,探讨了复合材料电阻率的正温度系数(PashiveTemperatareCoefficient,简称PTC)效应和负温度系数(NTC)效应的形成机理,认为PTC效应是由聚合物熔融时发生的晶相向非晶相的转变以及由此而产生的热膨胀共同引起,NTC效应主要与炭黑粒子的附聚效应有关。

     
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