CAJ | 학술논문

将BaTiO3陶瓷作为第二相无机填料加入CB/聚合物基PTC复合材料,目的是利用BaTiO3陶瓷显著的PTC效应及在基体中与CB相互作用以进一步改善聚合物基复合材料的导电性及PTC性能.结合对材料显微结构的分析,当CB体积分数同定为8%,BaTiO3含量达到一定值时所得材料的导电性优于单一CB和聚合物复合,其PTC效应可提高近两个数量级,且能够在一定程度上削弱负温度系数效应.
장BaTiO3도자작위제이상무궤전료가입CB/취합물기PTC복합재료,목적시이용BaTiO3도자현저적PTC효응급재기체중여CB상호작용이진일보개선취합물기복합재료적도전성급PTC성능.결합대재료현미결구적분석,당CB체적분수동정위8%,BaTiO3함량체도일정치시소득재료적도전성우우단일CB화취합물복합,기PTC효응가제고근량개수량급,차능구재일정정도상삭약부온도계수효응.
Barium titanate ceramic(BaTi03,BT)is considered as the most important positive temperature coefficient(PTC) ceramic materials,which can easily span across insulating regions and further connect the existing conductive pathways.BT is incorporated into the carbon black(CB)filled high density polyethylene(HDPE)polymer composites to achieve a desired conductivity and further improved PTC effect.It was found that the conductivity and PTC intensity of the specimens were remarkably improved when the concentration of BT reaches a certain level.When compared to the CB/HDPE composites,the negative temperature coefficient effect(NTC)in the CB/(HDPE-BT)composites was also weakened to some extent.These results were explained in microstructure of the CB/(HDPE-BT)composites.