煅后焦真密度与粉末电阻率关系的研究

本文介绍了煅后焦的真密度与粉末电阻率的测定方法、两者的关系情况,发现真密度与电阻率的线性相关性较好,相关系数可以达到0.9764,对分析煅后焦产品数据的准确性、快速指导装置生产、了解产品质量及避免质量纠纷具有一定的指导意义。

浅谈影响煅后石油焦粉末电阻率的因素

通过实验，分析煅后石油焦粒度、施加压力以及电流变化对实验结果的影响，强调在粉末电阻率的测定过程中必须严格按标准采做才有可比性。

Application of face centred cubic TiB powder as conductive filler for electrically conductive adhesives

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.

高温热处理对沥青焦结构和性能的影响

本文系统的研究了高温热处理对沥青焦结构和性能的影响,结果表明:随着热处理温度的提高,沥青焦中的C含量逐渐增加,而H、N和O含量总体上趋于下降;提高热处理温度可以使沥青焦的碳微晶结构更加有序,粉末电阻率显著下降,并且真密度增大;然而,随着热处理温度的升高,沥青焦的比表面积呈现先降低再增大的趋势;此外,提高热处理温度可以抑制沥青焦的空气和CO_2反应活性。

生物质废油作为黏结剂在石油焦细粉冷压成型中的应用

针对铝用预焙阳极在当前生产过程中面临石油焦细粉焦量过大的难题,给出了解决方案。利用生物质废油与粉焦冷压成型所用的黏结剂性质相似的特点,分别添加质量分数为3%,6%,9%,12%4种比例的生物质废油作为黏结剂制备粉焦成型块,并按照预定的升温曲线进行煅烧,对成型块进行物性、力学性能和电学性能的检测。测试结果表明,添加质量分数为9%的生物质废油制得的粉焦成型块各种性能综合最优,真密度达到2.00 g/cm^(3),抗压强度23 MPa,粉末电阻率500μΩ·m,经过工艺改进有望满足生产要求,本次研究证明将生物质废油用于粉焦冷压成型的方案是可行的,提供了一种“变废为宝”的创新思路。