Face centred cubic (FCC) TiB ceramic powder synthesized by Ti-boronizing method was used as conductive filler to make ceramic electrically conductive adhesives (ECAs) with the polymer matrix. Electrically conductive properties of the ceramic ECAs were studied. The bulk electrical resistivity varied with the powder content of the FCC-TiB in ECAs. The FCC-TiB filled ECAs also showed the percolation behavior that usually occurred for the metal-filled ECAs, the percolation threshold was located at the content of 60% FCC-TiB. A minimum value of 0.1 Ω·cm was obtained at a content of 75% FCC-TiB. In order to check the reliability of mechanical property, tensile test was done to measure the shear strength, and the shear strength dropped with increasing the content of FCC-TiB powders. It is about 12.26 MPa at the content of 70% TiB powders. The Cu filled ECAs were also prepared for comparison. The properties of the oxidation resistance of the two ECAs were evaluated. The results show that the ceramic ECAs have excellent oxidation resistance and better stability compared with the Cu filled ECAs.%将纯钛渗硼方法合成的面心立方TiB导电陶瓷粉末作为填料，制作了树脂基陶瓷导电胶。研究了陶瓷导电胶的电性能。导电胶的体电阻率随着面心立方TiB粉末含量的变化而变化。面心立方TiB陶瓷粉末填充型导电胶表现出与金属填充型导电胶相同的逾渗行为，渗流阈值出现在面心立方TiB陶瓷粉末含量为60%时。当面心立方TiB含量为75%时获得了最小体电阻率，0.1Ω·cm。为检验力学性能的可靠性，进行拉伸试验，测量不同TiB粉末含量导电胶的剪切强度，发现剪切强度随着面心立方TiB粉末含量的增加而降低，当TiB粉末含量为70%时，剪切强度约为12.26 MPa。制备了铜粉添加型导电胶用作对比，评估了2种导电胶的抗氧化性能。结果表明，陶瓷导电胶具有优异的抗氧化性能和良好的稳定性。
展开▼
