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阐述单晶金刚石在高端技术领域的应用,包括微型超精金刚石切削工具如加工成形随意曲率超细槽的方形立铣刀,用于三维表面微凹坑和任意曲率面加工的超精纳微型球形立铣刀,以剃削和快速切削加工直线超细槽的切削工具,此外还有人造单晶金刚石制作的高压水力喷射切割装置的喷射喉管,以及单晶金刚石制作的微型光学元件,并述及大单晶CVD金刚石的潜在用途。 相似文献
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A new method was proposed to directly measure the effective resistance and distinguish the porous frequency in the regenerator
of the microminiature thermoacoustic refrigerator. Measured results were compared with the flux gain factor and transmission
loss of the real system. The results show that the agreement between the range of the porous frequency and frequency of the
system is good, the method can be used to predict the porous frequency of the regenerator in production.
Foundation item: Project supported by the Postdoctoral Science Foundation of Central South University 相似文献
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A new method was proposed to directly measure the effective resistance and distinguish the porous frequency in the regenerator of the microminiature thermoacoustic refrigerator. Measured results were compared with the flux gain factor and transmission loss of the real system. The results show that the agreement between the range of the porous frequency and frequency of the system is good, the method can be used to predict the porous frequency of the regenerator in production. 相似文献
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基于传统镀金工艺存在的不足,结合超声波电镀机理,提出了一种新的适合微型继电器接触簧片的镀金工艺.该工艺结合了滚镀与挂镀的特点,采用自制简易振动篮。通过实验确定了时间、电流和镀层厚度之间的关系,并发现采用该工艺得到的镀层能满足产品使用要求,指出了该工艺维护的要点及不足。 相似文献
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超小型高屏效金属盒体的屏效测试技术 总被引:1,自引:1,他引:0
为解决工程中超小型、高屏效金属盒体的屏蔽效能测量问题,测试天线必须具备尺寸小、频带宽以及辐射强度高的特点。使用HFSS对天线尺寸参数进行优选,采用双锥和套筒结构分别覆盖100 MHz~2 GHz和2~5 GHz两个频段,由该天线所构成的测试系统的动态范围比早期的球形偶极子天线提高了50 dB左右。最后对3种不同的机箱状态在半电波暗室中进行了屏蔽效能测试,试验获得的数据为今后的机箱屏蔽设计提供了依据。 相似文献
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