复合相层电陶瓷的阻抗谱研究

用低频交流阻抗分析法对相复合导电化的陶瓷的导电机构进行了研究，结果表明，导电通路虽由导电相粒子连接而成，但导电相粒子间的接触电阻也电构成样品电阻的重要部分，它随温度上升而下降，使样品呈半年体性。     

烧结对 TiC-堇青石复相陶瓷导电性能的影响研究

用相复合技术制备了导电化陶瓷。通过比较不同工艺参数组合条件下制备的样品的导电性能，发现烧结致密化不是影响样品导电性的主要因素。通过高温烧结过程，改善导电相颗粒的接触状况，降低其间接触电阻，是改善样品导电性的最有效手段。     

烧结对TiC—堇青石复相陶瓷导电性能的影响研究

用相复合技术制备了导电化陶瓷。通过比较不同工艺参数组合条件下制备的样品的导电性能，发现烧结致密化不是影响样品导电性的主要因素。通过高温烧结过程，改善导电相颗粒的接触状况，降低其间接触电阻，是改善样品导电性的最有效手段。     

各向异性导电胶膜的导电粒子电性能研究

各向异性导电胶膜(ACF)连接线路的导电性能对导电粒子的变形影响很大.对ACF粘接后的导电粒子电阻进行了理论模型的建立,分析了导电粒子变形程度对其导电电阻的影响,并与实验结果进行了比较,吻合很好;在高温、高湿环境下,通过对导电粒子回弹进行有限元模拟,得到了导电粒子回弹量;并分析了回弹粒子对导电电阻的影响以及导电粒子的数量对总电阻的影响,得到了各向异性导电胶膜连接的线路最佳的导电粒子变形量和湿热环境对其的导电性能的影响程度.     

CrO2／Polystyrence复合材料导电机制的研究

研究了CrO2／Polystyrence（聚苯乙烯简称PS）的复合样品的导电机制．对样品的电输运性质进行研究时发现零场电阻随PS含量增加而明显增大,电导对温度的变化表现出较强的依赖性;进一步分析发现复合样品的电导主要由两种导电通道构成：与温度呈指数关系的自旋相关的晶粒间的隧穿电导和与温度成幂指数关系的自旋无关跳跃电导．     

Li2O-Sb2O3-TiO2-P2O5系统玻璃的结构与性能

采用熔融冷却法制备了Li2 O-Sb2 O3-TiO2-P2 O5系统玻璃,并研究了该四元系统玻璃的析晶性能和导电性能与结构之间的关系.通过FT-IR分析了玻璃的网络结构,利用XRD测试了热处理后样品的晶相,通过热膨胀曲线和DTA分析了特征温度,利用电阻测量仪测试了不同组分热处理前后样品的电阻,并计算出了样品的体积电导率,确定了样品的TK-100,分析了热处理对样品电导率的影响.研究结果表明,当Sb2 O3摩尔分数为30％时,该组分玻璃的电阻最大,TK-100为628 K,而且样品的密度较大为3.50 g/cm3,300℃时热膨胀系数为10.36×10-6℃-1.热处理后,该组分电导率有所提高,TK-100为623 K,而其余各组电导率均有不同程度的下降.     

纳米导电粒子/两相高分子复合材料的研究进展

综述了纳米导电粒子在两相高分子复合材料中的导电机理和选择性分散机理,以及制备复合型导电高分子的主要方法.并在此基础上展望了复合型导电高分子材料的发展前景和未来面临的挑战.     

FTO上溅射ITO薄膜及光电性能

通过脉冲磁控溅射法在掺氟氧化锡透明导电薄膜(FTO)基底上制备了氧化铟锡(ITO)透明导电薄膜。研究了溅射时间和衬底温度对FTO基底上制备的ITO薄膜的光透过率和电性能的影响。采用SZT-2四探针测试仪测量样品表面的电阻,用扫描电镜(SEM)对样品进行表征。结果表明,随着溅射时间的增加以及衬底温度的升高,以FTO导电薄膜为基底制备的氧化铟锡(ITO)透明导电膜的电阻逐渐减小,而后基本保持不变。在基片温度为400℃、溅射时间为45min时,方块电阻最小值达到1.5Ω。     

MgO掺杂对CeO2-ZrO2材料阻抗特性的影响

利用交流复阻抗分析技术对(MgO,CeO2)复合掺杂ZrO2材料的阳抗特性进行了研究.结果表明,随着MgO掺入量的增加,参与跃迁的氧空位增多,并促进烧结体的密度上升,气孔率降低,导致导电相粒子间的接触电阻减少,提高了(ZrO2)1-x-y(YO1.5)x(MgO)y陶瓷的电导率.     

纳米VO2/PEDT复合膜的制备及阻温特性的研究

将纳米VO2粉体与聚3,4-乙撑二氧噻吩复合,制备出一种新型的负电阻温度系数特性的聚合物基复合材料。通过计算复合膜简化模型的等效电阻网络,结果表明串联电阻结构有利于复合膜表现出高电阻相二氧化钒的电阻温度特性。同时,由于掺杂过的VO2粉体相和聚3,4-乙撑二氧噻吩导电聚合物相的共同作用,这种复合膜的电阻随温度变化量可达到一个数量级以上。最后,给出了复合膜的扫描电子显微镜图像结构。     

Deformation characterization of conductive particles in anisotropically conductive adhesive simulated by FEM

The deformation behavior and the contact area of conductive particles in anisotropically conductive adhesives (ACA) were investigated by finite element method (FEM). The solid conductive particles are made of pure Ni and Cu. The results indicate that the deformation of the conductive particles is inhomogeneous during fabrication. When the reduction in height is small the deformation concentrates in the area near the contact area. As the reduction in height increases, the strain in the area near the contact area increases, and the metal flows toward the circumference, resulting in the increase of the contact area between the conductive particles and pad. The higher the degree of deformation, the larger the contact area. The regression equations were offered to express the relations between the bounding force and the contact area or the reduction in height. An approach of how to obtain the maximum contact area in ACA was discussed.     

测试导电复合材料直流电阻的四端电极法

为了探讨基于网状或环状电极的直流四端电极法在导电复合材料电阻测试中应用的可行性,比较了应用于不同基体、不同导电填料的导电复合材料直流电阻测试的两端电极法和四端电极法,提出了网状或环状电极与导电复合材料之间接触电阻的计算方法并进行了验证.研究表明:基于网状或环状电极的直流四端电极法可消除在直流两端电极法测试中存在的电极与导电复合材料之间的接触电阻;电极与导电复合材料之间接触电阻是非欧姆性的,接触电阻的大小与被测导电复合材料自身性质有关,其数值是可求解的.基于网状或环状电极的直流四端电极法适用于测试导电复合材料的电阻.     

LDPE／炭黑复合导电材料PTC／NTC效应形成机理的探讨

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。     

In_2O_3和ZnO混合薄膜的化学腐蚀特性研究

利用直流磁控溅射在未加热的BK-7玻璃基片上沉积In2O3与ZnO混合(IZO)薄膜,通过原子力显微镜(AFM)、分光光度计和四探针法研究IZO薄膜在HCl溶液中不同腐蚀时间前后的表面形貌以及光电性质的变化。结果表明:随着腐蚀时间的增加,薄膜的表面均方根粗糙度(RMS)和方块电阻(Rs)都呈现先增后减再增的现象;而薄膜的光学透射率则是先减后增再减。由于ZnO比In2O3更容易在HCl溶液中进行腐蚀,使得样品经腐蚀后出现孔洞结构,孔宽与孔深都随着腐蚀时间的增加而增大,这种具有纳米孔洞结构的透明导电薄膜在未来的光电子器件有潜在应用。     

硝酸-冰乙酸腐蚀对CdTe太阳电池性能的影响

在CdTe与金属背电极间形成稳定的低电阻接触,有助于提高CdTe太阳电池性能。采用硝酸-冰乙酸腐蚀CdTe薄膜并用真空蒸发法沉积铜背接触层,制备CdTe太阳电池。结果表明,化学腐蚀后在膜面生成了富碲层,硝酸-冰乙酸腐蚀为各向同性刻蚀。对背接触层进行优化退火处理,获得转化效率11.75%的CdTe太阳电池。     

The electrical conductive effect of nickel-coated graphite/two-component silicone-rubber sealant

Nickel-coated graphite particles and two-component silicone-rubber were compounded to form a conductive composite system. The electrical volume resistivity of the composites were examined and compared under constant tensile strains, cyclic heating-cooling, electric field and repeated cyclic tensile strains in order to study the mechanism of electrical conductivity behaviors of the conductive composites under stress, temperature and current. The results showed that a peak value of the electrical resistivity appeared previously and then gradually increasing with increasing tensile strain. The electrical resistivity displayed positive temperature coefficient effect during the temperature increasing and decreasing. Applying 5A direct current to the conductive composites resulted in an increase in the electrical resistance immediately, but no changes were detected under lower currents. Under the repeated cyclic strain, the peak value of the electrical resistivity of each cycle increased with the test cycle. All the electrical resistivity changes were attributed to the conductive networks broken-up and rebuilt in the conductive composites.     

Ionic conductive hydrogels toughened by latex particles for strain sensors

Conductive hydrogels have attracted tremendous attention due to their excellent softness and stretchability as wearable strain sensing devices. However, most of hydrogel-based strain sensors suffered from poor self-recoverability and fatigue resistance,resulting in significant decrease of strain sensitivity after recycling. Here, a soft and flexible wearable strain sensor is prepared by using an ionic conductive hydrogel with latex particles as physical cross-linking centers. The dynamic physical cross-linking structure can effectively dissipate energy through disruption and reconstruction of molecular segments, thereby imparting excellent stretchability, self-recoverability and fatigue resistance. In addition, the hydrogel exhibits excellent strain-sensitive resistance changes, which enables it to be assembled as a wearable sensor to monitor human motions. As a result, the hydrogel strain sensor can provide precise feedback for a wide range of human activities, including large-scale joint bending and tiny phonating. Therefore, the tough ionic conductive hydrogel would be widely applied in electronic skin, medical monitoring and artificial intelligence.     

导热硅胶/相变材料复合组件在电池热管理中的应用

一种低温导热硅胶/相变材料复合组件在电池模组中的使用, 有效地解决了相变材料由于液化而发生的析出问题, 同时保持相变材料高导热与高潜热值。由于导热硅胶片具有一定的弹性与黏性, 使得整个系统具有一定缓冲作用, 减少了相变材料与电池之间的接触热阻, 进一步提高了整个系统的散热性能。在3C放电倍率下, 相比自然冷却方式的66.63 ℃, 强制风冷方式的57.99 ℃, PCM(Phase Change Material)冷却方式的最高温度为44.78 ℃, 分别下降了32.8%、22.78%; 温差为3.70 ℃, 满足电池模组的最大温差的要求。在3C放电倍率的循环中, PCM冷却方式的电池模组在3次循环后的温度为51.45 ℃, 在安全温度范围内。