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场敏感型环境自适应电磁防护材料属于新材料,当外部电磁场超过某临界场强的时候,该材料可以在微纳秒时间内即刻发生绝缘/导电相变现象,即平时为绝缘体的材料迅速变为高导电的类金属材料,由于该材料发生相变的临界场强阈值较高,传统的材料静态测试方法以及低压动态测试都无法满足测试需求。根据该材料的工作机理,设计了一种可以产生高场强的动态测试系统,通过仿真和电磁场理论分析了该测试夹具的可行性,确定了其具体参数,进而研制成功了一种用于该材料的动态测试夹具,确定了其相应的测试方法,通过试验发现,该夹具可以对突变后类金属材料的等效电阻为1 kΩ以下、1μs以下的响应时间、1 MV/m以下的临界场强进行电阻率、响应时间和临界场强阈值的测试。
Field sensitive environment adaptive electromagnetic shielding materials are new materials, when the external electromagnetic field exceeds a critical field strength, the material can occur in the micro-nanosecond time insulation / conductive phase transition phenomenon, that is usually the rapid change of the material of the insulator Is a highly conductive metal-like material. Due to the high critical field strength threshold of the material, the traditional material static testing methods and low-voltage dynamic testing can not meet the testing needs. According to the working mechanism of the material, a dynamic test system that can generate high field strength is designed. The feasibility of the test fixture is analyzed through simulation and electromagnetic field theory, and its specific parameters are determined. The dynamic test fixture of the material has been confirmed, and its corresponding test method has been determined. The experimental results show that the fixture has the equivalent resistance of 1 kΩ or less, the response time of 1μs or less, the critical field of 1 MV / m or less Strong resistance, response time and critical field strength threshold test.