共查询到19条相似文献,搜索用时 46 毫秒
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本文介绍了适用于PCB电镀的阳极磷铜的检验方法,整理了阳极磷铜在使用过程中的各种不良表现,同时给出了 不良阳极磷铜所造成影响的处理方法。 相似文献
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本文指出了早期旋转阳极 X 射线管的缺点。介绍了带螺旋槽轴承的旋转阳极 X 射线中如何解决阳极冷却困难和轴承寿命受限等问题,使管子的性能和寿命显著提高,使诊断 X 射线管的发展出现了新的突破。 相似文献
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硫酸盐光亮镀铜正常生产情况下,磷铜阳极表面有一种黑色的阳极膜,有助于阳极的正常溶解。当阳极出现异常阳极膜脱落,阳极出现硫酸铜结晶,电流异常朝低电流跳动,无法继续生产。本文结合实际案例对阳极钝化进行探讨和怎样预防阳极钝化。 相似文献
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给出了电子管水冷阳极耗散能力的计算方法和提高水冷阳极耗散能力的措施。指出通过阳极的特殊设计可以把冷却水的对流换热状态过渡到高效率的沸腾换热状态,大大提高了阳极允许功率耗散密度。 相似文献
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铝电解电容器阳极氧化膜的结构 总被引:2,自引:4,他引:2
铝经阳极氧化形成的阳极氧化膜分为无定形和晶形两种基本结构,阳极氧化膜对铝电解电容器的性能有极大的影响,本文叙述阳极氧化膜的结构、生长机理及与形成条件的关系。 相似文献
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We have demonstrated an indium-tin-oxide free organic light-emitting device (OLED) with improved efficiency by doping poly (3,4-ethylene dioxythiophene):poly (styrene sulfonate) (PEDOT:PSS) with graphene oxide (GO) as a composite anode. In comparison with a pure PEDOT:PSS anode, 55% enhancement in efficiency has been obtained for the OLEDs based on the PEDOT:PSS/GO composite anode at an optimal condition. The PEDOT:PSS/GO composite anode shows a lower hole-injection barrier, which contributes to the improved device efficiency. Moreover, both high transmittance and good surface morphology similar to that of the pure PEDOT:PSS film also contribute to the enhanced efficiency. It is obvious that composite anode will generally be applicable in organic optoelectronic devices which require smooth and transparent anode. 相似文献
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正We report AI/MoO_3 thin film used as a complex anode in high-performance OLEDs.The unique efficacy of the device was found to result from the enhanced injection of holes into the commonly used hole-transporting molecules due to a large reduction in the interface dipole at the anode/organic interface.The superior optical characteristics are attributed to a strong cavity effect.Due to the ease of processing Al/M0O_3 we successfully demonstrated large-area flexible OLEDs on plastic substrates with uniform emission. 相似文献
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基于X波段行波管实验研究的需要,研制了行波管脉冲电源系统。该脉冲电源系统主要由阳极控制电源、慢波线电源、收集极电源、辅助电源和控制系统组成,其中关键在于阳极控制电源的研制。针对阳极控制电源的输出脉冲宽度变化大的特点,采用串联固态开关控制阳极电压。实验结果表明,该脉冲电源系统满足行波管实验研究的要求,在X波段行波管上实现了阳极脉冲电压脉宽在4μs~3000μs内连续可调。 相似文献
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阐述了CT机X射线管用旋转阳极靶材的工作原理及其常见失效形式。随着CT机市场的日渐壮大,其对旋转阳极靶材的需求将越来越大。文中从3个方面全面阐明了国内CT机X射线管用旋转阳极靶材的市场需求及其产业现状。最后,提出了整合国内旋转阳极靶材行业现有的技术力量,引进专业技术人才,自主研发的建议,以期尽快实现高质量CT机X射线管旋转阳极靶材的国产化。 相似文献
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A new lateral insulated-gate bipolar transistor (LIGBT) with a SiO2 shielded layer anode on SOI substrate is proposed and discussed.Compared to the conventional LIGBT,the proposed device offers an enhanced conductivity modulation effect due to the SiO2 shielded layer anode structure which can be formed by SIMOX technology.Simulation results show that,for the proposed LIGBT,during the conducting state,the electron-hole plasma concentrations in the n-drift region are several times larger than those of the conventional LIGBT; the conducting current is up to 37% larger than that of the conventional one.The enhanced conductivity modulation effect by SiO2 shielded layer anode does not sacrifice other characteristics of the device,such as breakdown and switching,but is compatible with other optimized technologies. 相似文献