ZrVFe吸气剂吸气性能试验分析

本文介绍了一种直接衡量ZrVFe吸气剂对残余气体的吸附作用的试验方法，并对试验结果进行了进一步的分析，初步提出了在可能的情况下用此方法来监控吸气剂吸气性能的试验步骤和评判标准。     

钙吸气剂

自显像管发明以来，一直使用铋作为吸气剂，但是，钡有污染环境、钡膜在高能电子轰击下会产生X射线等缺点，所以吸气剂研制者们一直在潜心研究取代钡吸气剂的材料。本文介绍了一种可以与B副诚-Ni吸气剂吸气能力相当的CaAl2-i吸气剂。这种吸气剂对环境污染影响小，不会产生有害的X射线，所以业界内期待着将它开发成实用的品种。     

锆钒铁吸气剂常温激活吸氢现象的研究

介绍了锆钒铁吸气剂在室温(约20℃)下真空放置,不需高温激活即具有大量吸氢能力的现象.着重从表面吸附的角度分析此现象的反应机理,建立了反应模型,并进行了试验验证,由此得到影响该现象的主要因素.针对该现象的研究对于锆钒铁等吸气材料应用于蓄能电池、贮氢材料、核物理应用等领域具有重要意义.     

吸气剂重复激活次数对吸气效能的影响

红外探测器杜瓦的真空可靠性对杜瓦正常工作有重大意义。若吸气剂激活后吸气能力下降,则杜瓦的长期真空可靠性存在风险。通过测试锆钒铁吸气剂在真空环境中的重复激活次数对吸气剂吸气效能的影响,获得了相应的吸气量与吸气速率变化数据。结果表明,随着重复激活次数的增加,吸气剂的饱和吸气总量无明显变化,且初始吸气速率略微提高,最后趋于稳定。实验结果可用于指导后续杜瓦封装工艺。     

新型非蒸散消气剂的激活温度和吸气性能的实验研究

对主要成分为Zr和Co的新型非蒸散消气剂进行了活化温度及吸气性能的实验研究。实验表明其活化温度为200—250℃，对N2，H2等活性气体有很好的抽速，对惰性气体He等无抽速。     

消气剂在低真空中的吸气作用

红外探测器或其他电真空器件,由于各种原因,真空度下降,甚至不能正常工作。使用非蒸散型常温消气剂,可使真空度恢复并提高1～2个数量级,维持高真空8个月以上。这种消气剂可反复激活再生20多次。本文叙述实验过程和要求,得到了一些实验数据和结果。     

锆钒铁吸气剂

本文主要介绍了一种低温激活、常温使用的锆钒铁吸气剂的研制过程，并阐述了锆钒铁吸气剂吸气性能的测试方法。同时，介绍了锆钒铁吸气剂在电子器件、真空技术和科学研究中的应用。     

现代吸气剂及其应用技术

近年来，新型叹气剂的开发和应用均取得长足的进步。吸气剂在真空技术领域内愈加显示出它的重要性。本文介绍了吸气剂的吸气机理，吸气材料对氢及其同位素之间的吸附、解吸的平衡理论问题，蒸散型吸气剂和非蒸散型吸气剂的最新发展和应用等．     

All-Solid-State Electro-Chemo-Mechanical Actuator Operating at Room Temperature

Dimensional change in a solid due to electrochemically driven compositional change is termed electro-chemo-mechanical (ECM) coupling. This effect causes mechanical instability in Li-ion batteries and solid oxide fuel cells. Nevertheless, it can generate considerable force and deformation, making it attractive for mechanical actuation. Here a Si-compatible ECM actuator in the form of a 2 mm diameter membrane is demonstrated. Actuation results from oxygen ion transfer between two 0.1  µ m thick Ti oxide\Ce_0.8Gd_0.2O_1.9 nanocomposite layers separated by a 1.5  µ m thick Ce_0.8Gd_0.2O_1.9 solid electrolyte. The chemical reaction responsible for stress generation is electrochemical oxidation/reduction in the composites. Under ambient conditions, application of 5 V DC produces actuator response within seconds, generating vertical displacement of several µm with calculated stress ≈ 3.5 MPa. The membrane actuator preserves its final mechanical state for more than 1 h following voltage removal. These characteristics uniquely suit ECM actuators for room temperature applications in Si-integrated microelectromechanical systems.     

光照下巨磁电阻氧化物的室温响应性质

实验测量了巨磁电阻锰氧化物的光吸收谱,研究了在波长为０．６３μｍ的Ｈｅ－Ｎｅ激光和波段λ＝８￣１４μｍ的红外辐射条件下,薄膜在室温下的光响应性质。通过分析光响应与高制频率、偏置电流的关系,讨论了光响应机理。     

室温Si-玻璃直接键合技术研究

将表面亲水性处理过的玻璃和Si片在室温、大气的环境下干燥,进行温度为150C以下、时间为20～200h的预键合。预键合后,Si和玻璃基片表面能有显著的提高,水分子和Si表面Si-OH原子团中的O原子连在一起,OH团数量增加了许多,形成较多的H键。预键合的Si-玻璃基片在200C下退火．消除由Si、玻璃热膨胀系数和热传导系数差异引起的诱导应力。2基片的Si-OH间发生聚合反应．产生水及si-O键,使得基片键合的表面能得到了更好的提高、测量了室温键合时间对Si玻璃表面能力的影响以及退火时间对键合强度的影响。实验结果证明．这项技术对Si-玻璃器件的键合十分有效。     

低室温电阻率正温度系数热敏电阻器

Ｖ２Ｏ３与聚合物复合可制备室温电阻率０．４Ω·ｃｍ，ＰＴＣ效应高达１０个数量级的热敏电阻材料。讨论了Ｖ２Ｏ３含量、聚合物种类和含量对室温电阻率和ＰＴＣ效应的影响规律，并对复合材料的微观结构进行分析，用隧道效应解释了ＰＴＣ效应。     

洁净手术部负压吸引系统设计探讨

重点介绍了医院洁净手术部负压吸引系统的组成以及系统中相关设备(如真空分配器、气液分离器、真空泵等)的主要作用;同时围绕洁净手术部水环真空泵,在简要介绍其工作原理的基础上,对其类型的选择、台数的确定、参数的比较确定等内容进行了总结。     

烧结温度对YBCO陶瓷常温物理性能的影响

采用固相烧结法制备YBa2Cu3O7-x(YBCO)陶瓷,研究其在常温下电导率特性及烧结温度对电导率和热膨胀系数的影响。研究结果表明,YBa2Cu3O7-x相形成的温度为930℃、940℃烧结的YBCO陶瓷电导率最佳(达到9.742×105S/m),电导率具有随环境温度的变化呈正温度系数特点;烧结温度越高,电导率的环境热稳定性越好,烧结温度为950℃时,电导率基本不随环境温度变化而变化。不同烧结温度制备的YBCO陶瓷,热膨胀系数基本一致(为13.60~14.06μK-1),与铁素体不锈钢接近。     

Artificial Magnetic Bacteria: Living Magnets at Room Temperature

Biogenic magnetite is a fascinating example of how nature can generate functional magnetic nanostructures. Inspired by the magnetic bacteria, an attempt is made to mimic their magnetic properties, rather than their structures, to create living magnets at room temperature. The non‐magnetic probiotic bacteria Lactobacillus fermentum and Bifidobacteria breve are used as bioplatforms to densely arrange superparamagnetic nanoparticles on their external surfaces, thus obtaining the artificial magnetic bacteria. Magnetic probiotic bacteria can be produced by using superparamagnetic maghemite nanoparticles assembled at their surfaces. They present a collective ferromagnetic phase at room temperature. The blocking temperature of these maghemite nanoparticles increases more than 100 K when assembled at the artificial magnetic bacteria.     

Light-Driven Polymer-Based All-Solid-State Lithium-Sulfur Battery Operating at Room Temperature

Poly(ethylene oxide)-based polymer all-solid-state Li S battery is a promising candidate due to its high specific energy, good processability, and low cost. However, the poor room temperature ionic conductivity limits its further development. Here an innovative photothermal battery technology is proposed to realize the normal operation at room temperature. This design places the 3D Cu substrate with Cu/Si core-shell structures between Li anode and outer encapsulation glass, so that the light can come in and generate heat efficiently by utilizing the carrier nonradiative recombination of Si nano shell, then the heat quickly transfers to the battery system through Cu core. Once simulated sunlight irradiates, the battery achieves a fast reaction kinetics and superior photothermal conversion, thus realizing a lifespan of over 20 cycles with a capacity of 1089.9 mAh g⁻¹ at 0.2 C. Even on the actual sunlight irradiation, a high discharge/charge capacity of 1065.2/1036.5 mAh g⁻¹ is also reached, indicating an excellent reversible electrochemical process. Moreover, the 3D nanostructure can accommodate the fatal volume variation of lithium and reduce the effective current density, thus suppressing the dendrite nucleation and growth. This study will open the avenue to develop a room temperature polymer all-solid-state Li S battery using photothermal technology.