飞机电热防冰用BaTiO_3热敏陶瓷力学性能的改进  

BaTiO 3 Thermistor Used in Aircraft′s Electro Thermal Ice Protection and Its Mechanical Property

作　　者：徐国跃[1] 谢国治[1] 肖军[1] 马立新[1] 

机构地区：[1]南京航空航天大学材料科学与工程系

出　　处：《南京航空航天大学学报》1999年第1期97-102,共6页Journal of Nanjing University of Aeronautics & Astronautics

基　　金：航空科学基金

摘　　要：飞机电热防冰系统用ＢａＴｉＯ３基ＰＴＣ热敏陶瓷材料要求有低电阻及优良的ＰＴＣ效应，同时有良好的力学性能。本文叙述了在ＢａＴｉＯ３为基的ＰＴＣ材料中，通过配方组成设计及先进的工艺制备手段，获得了居里温度５０℃，室温体电阻率８０Ω·ｃｍ，ＰＴＣ效应１０６数量级，耐电压２４０Ｖ／ｍｍ，断裂韧性ＫＩＣ１９．１４ＭＮ／ｍ３／２，冲击韧性２．６Ｊ／ｃｍ２，抗弯强度１０８ＭＰａ，综合性能优良的ＰＴＣ材料。初步实验表明，该发热体陶瓷具有较强的防冰和化冰能力。The BaTiO 3 based PTC thermistor, used in the aircraft′s electro thermal ice protection system,requests low resistivity,good PTC effect and excellent mechanical pro perties. This paper describes the formula and advanced manufacturing technology of BaTiO 3 based PTC ceramics. The PTC thermistor has the such excellent properties as curie temperature 50℃,volume resistivity at room temperature 80 Ω·cm,PTC effect 10 6 order of magnitude,withstand voltage 240 V/mm,bending strength 108 MPa,fracture toughness property 19.14 MN/m 3/2 and impact toughness 2.6 J/cm 2. The preliminary experiments show that the thermal ceramics have good properties of ice protection.

关 键 词：热敏陶瓷 飞机 电热防冰系统 制备 钛酸钡 

分 类 号：V244.15[航空宇航科学与技术—飞行器设计] TM280.14[一般工业技术—材料科学与工程]