导　　师： 王占平;田连城

学科专业： 080902

授予学位： 硕士

作　　者： ;

机构地区： 电子科技大学

摘　　要： 多层陶瓷电容器（MLCC）由于其体积小、容值比高、易片式化、易于批量化等诸多的优点，随着其不断的发展，对其多功能化的趋势也越来越迫切。目前主要的几个多功能化发展的方向分为在射频段使用的射频大功率多层陶瓷电容器、在微波段使用的微波多层陶瓷，以及在脉动电路中使用的脉冲功率电容器、在高压线路中使用的高压多层陶瓷电容器、在电源开关电路中使用的大容量多层陶瓷电容器和在高温恶劣环境的电路中使用的高温多层陶瓷电容器。 本文就目前国内需求紧迫在高温恶劣环境下工作的各种电子系统（如各类新型车载用电子控制装置、油田勘探系统的各种测井仪器、飞机发动机周围的电子系统等）中急需的高温X8R多层陶瓷电容器进行了研究。研究内容包括X8R陶瓷材料的研制、利用该材料采用多层陶瓷电容器设计及工艺技术来实现批量生产，解决目前国内对高温X8R多层陶瓷电容器需求。 本文所研制的高温X8R多层片式陶瓷电容器与美国NOVACAP公司的高温X8R多层片式陶瓷电容器各项电性能指标相当，除了能在汽车电子及油气田勘探使用外，还能应用到战斗机的发动机中。本文产品研制中采用的技术标准GJB912A-98有可靠性指标的无包封多层瓷介片式电容器总规范等同于美国军用标准MIL-55681。 本文所研制的高温X8R多层片式陶瓷电容器的主要指标经测试为：工作温度范围为-55oC～150oC；损耗角正切在25oC时最大值为0.025/(2.5/%/)；1KHz的测试参数为1.00.2VRMS,25oCS；温度特性（150oC）ΔC//C最大为15/%；绝缘电阻在25oC时大于100GΩ或者大于1000ΩF，在150oC时大于10GΩ或者大于100ΩF；额定工作电压小于200V,测试电压250/%；老化率小于2.0/%//十倍时。 Multi-layer ceramics capacitor /(MLCC/) has many advantages, such asminiaturization, high value of capacitance, realization in chips and mass production.And the trend of multi-function has become obvious with the continuous developmentof technology. The technology of multi-function is mainly developed towardsmultilayer ceramic capacitors used in RF band, in microwave band, in pulse circuits, inhigh voltage transmission lines, in power switching circuits and in circuits of hightemperature in harsh environment. This paper studied the high-temperature X8R multilayer ceramic capacitors usedin varies electronic systems operating in high temperature and harsh environment/(newtypes of electronic control devices on vehicles, logging tools in exploration system foroilfields, electronic systems for aircraft engines etc./) The research includes thematerial,the design of structure and the realization of mass production, that meets thedomestic demand. The device discussed in this paper is commensurate with that produced byU.S.NOVACAP. It applies not only for the electric systems on vehicles and explorationfor oilfields, but also for the engines in fighter aircraft. The technical standardGJB912A-98in the design is equivalent to U.S. military standards of MIL-55681. The test results of the device designed in this paper are as follows. The range ofoperating temperature is-55oC~+150oC. The maximum of loss tangent at25oC is0.025/(2.5/%/). The parameters tested at1kHz is1.0±0.2VRMS,25oCS. Thetemperature at150o C is±15/%for ΔC//C at maximum. The value of insulationresistance is larger than100G or1000F at25oC and is larger than10G or100Fwhen the temperature is150oC. The rated working voltage is less than200V. The testvoltage is250/%. The aging rate is less than2.0/%.//decade.

关 键 词： 多层陶瓷电容器 电子系统 高温 多层工艺

分 类 号： [TM534.1]

领　　域： [电气工程]