场致绝缘-金属相变材料的脉冲响应测试方法

Test Method for Pulse Response of Field-induced Insulator-metal Transition Material

场致绝缘-金属相变材料可以满足强电磁脉冲攻击下电子信息装备自适应高效防护的迫切需求,然而其脉冲响应测试方法还不明确,是亟待解决的关键问题。基于微带线原理,提出一种测试范围宽、响应时间快的材料脉冲响应测试方法,并构建了相应的测试系统。建立水平极化下测试系统的等效电路模型,推导出电磁脉冲作用下材料相变后电阻的计算公式,进一步通过电阻等效试验与材料样品性能测试,验证理论模型和测试方法的准确性和可行性。理论计算和试验结果表明:该测试方法能够满足材料相变后电阻范围为1Ω~30 kΩ的脉冲响应测试需求,且可以计算得到材料相变后的电阻、响应时间及恢复时间,为场致绝缘-金属相变材料电磁脉冲响应特性的定量评价和新材料设计提供了理论和技术支撑。

The field-induced insulator-metal transition material can meet the urgent demands of self-adaptive efficient protection of electronic information equipment under strong electromagnetic pulse.However,the pulse response test method of the material is not clear at present,which is a theoretical subject to be urgently solved.A micro-strip line test method with wide test range and fast response time is proposed based on the principle of micro-strip line,and a corresponding test system is developed.The equivalent circuit model of the test system in terms of horizontal polarization is established,and the formula of material s resistance after phase change applied by electromagnetic pulse is derived.The accuracy and feasibility of the theoretical model and test method are verified by resistances equivalent test and material sample performance test.The theoretically calculated and test results show that the proposed test method can satisfy the requirements of pulse response test with resistance range of 1Ω-30 kΩ,the resistance,response time and recovery time of the material after the phase transition can be calculated,which provides a theoretical and technical support of quantitative evaluation of pulse response characteristics of the field-induced insulator-metal transition materials and new material design.