通讯设备用低阻高耐压过流保护器材料研究  

Research on Materials of Low Resistivity, High Voltage Over-current Protector for Communication Apparatus

作　　者：苏卫彦[1] 陈亿裕[1] 

机构地区：[1]华南理工大学电子材料科学与工程系,广东广州510640

出　　处：《电子元件与材料》2006年第8期61-63,69,共4页Electronic Components And Materials

摘　　要：过流保护器要求芯片尺寸为φ5mm×2.2mm,电阻值为15?,耐电压AC330V。采用液相施主掺杂和添加钙等方法优化配方制成PTCR材料。经复阻抗谱、SEM及XRD等测试分析表明,材料的微观结构得到了明显改善,PTC性能得以提高。当x(Mn(NO3)2)为0.47%时,材料的居里点为70℃、室温电阻率为14?·cm、温度系数为11.5%℃–1、耐压强度大于165V/mm。The required over-current protection chip size of our task is φ5mm×2.2mm, and the corresponding resistance and voltage durability are 15 Ω and 330 V（AC）. Using liquid-phase donor doping and calcium adding etc method to optimize the formulation, a PTCR material was acquired, Through complex impedance spectra, SEM, XRD etc. tests, it was proved that the microstructure and PTC properties of the material were improved. When x（Mn（NO3）2）=0.47%, The Curie point of the material is 70℃, room temperature resistivity is 14Ω· cm, temperature coefficient of resistance （ TCR ） is 11.5%℃^-1, voltage durance is over 165 V/mm.

关 键 词：电子技术 通讯设备 过流保护器 液相施主掺杂 PTCR 

分 类 号：TN373[电子电信—物理电子学]