ATOMIC LAYER DEPOSITION OF SUPER-CONDUCTING NIOBIUM SILICIDE
    32.
    发明申请
    ATOMIC LAYER DEPOSITION OF SUPER-CONDUCTING NIOBIUM SILICIDE 审中-公开
    超导硅酸钠的原子层沉积

    公开(公告)号:US20120219824A1

    公开(公告)日:2012-08-30

    申请号:US13036952

    申请日:2011-02-28

    IPC分类号: B05D5/12 B32B15/00

    摘要: A method of preparing a superconducting thin film of niobium silicide using atomic layer deposition (ALD) where the superconducting critical temperature of the film is controllable by modulating the thickness of the thin film. The film is formed by exposing a substrate within an ALD reactor to alternating exposures of a niobium halide (NbQx) and a reducing precursor, for example, disilane (Si2H6) or silane (SiH4). A number of ALD cycles are performed to obtain the film thickness and establish the desired superconducting critical temperature between 0.4 K and 3.1 K.

    摘要翻译: 使用原子层沉积(ALD)制备硅化铌超导薄膜的方法,其中膜的超导临界温度可通过调节薄膜的厚度来控制。 通过将ALD反应器内的基板暴露于铌卤化物(NbQ x)和还原性前体例如乙硅烷(Si 2 H 6)或硅烷(SiH 4)的交替曝光来形成膜。 执行多个ALD循环以获得膜厚度并建立在0.4K和3.1K之间的所需超导临界温度。

    Ultrananocrystalline diamond cantilever wide dynamic range acceleration/vibration/pressure sensor
    33.
    发明授权
    Ultrananocrystalline diamond cantilever wide dynamic range acceleration/vibration/pressure sensor 有权
    超晶体金刚石悬臂宽动态范围加速/振动/压力传感器

    公开(公告)号:US06613601B1

    公开(公告)日:2003-09-02

    申请号:US10142814

    申请日:2002-05-09

    IPC分类号: H01L2100

    摘要: An ultrananocrystalline diamond (UNCD) element formed in a cantilever configuration is used in a highly sensitive, ultra-small sensor for measuring acceleration, shock, vibration and static pressure over a wide dynamic range. The cantilever UNCD element may be used in combination with a single anode, with measurements made either optically or by capacitance. In another embodiment, the cantilever UNCD element is disposed between two anodes, with DC voltages applied to the two anodes. With a small AC modulated voltage applied to the UNCD cantilever element and because of the symmetry of the applied voltage and the anode-cathode gap distance in the Fowler-Nordheim equation, any change in the anode voltage ratio V1/V2 required to maintain a specified current ratio precisely matches any displacement of the UNCD cantilever element from equilibrium. By measuring changes in the anode voltage ratio required to maintain a specified current ratio, the deflection of the UNCD cantilever can be precisely determined. By appropriately modulating the voltages applied between the UNCD cantilever and the two anodes, or limit electrodes, precise independent measurements of pressure, uniaxial acceleration, vibration and shock can be made. This invention also contemplates a method for fabricating the cantilever UNCD structure for the sensor.

    摘要翻译: 在一个高灵敏度的超小型传感器中,采用悬臂结构形成的超微晶金刚石(UNCD)元件用于在宽动态范围内测量加速度,冲击,振动和静压力。 悬臂UNCD元件可以与单个阳极组合使用,测量光学或电容测量。 在另一个实施例中,悬臂UNCD元件设置在两个阳极之间,其中DC电压施加到两个阳极。 通过施加到UNCD悬臂元件上的小的AC调制电压,并且由于Fowler-Nordheim方程中所施加的电压和阳极 - 阴极间隙距离的对称性,维持指定的所需的阳极电压比V1 / V2的任何变化 电流比精确匹配UNCD悬臂元件的任何位移与平衡。 通过测量维持指定电流比所需的阳极电压比的变化,可以精确地确定UNCD悬臂的偏转。 通过适当地调制在UNCD悬臂与两个阳极之间施加的电压或极限电极,可以精确地独立测量压力,单轴加速度,振动和冲击。 本发明还考虑了用于制造用于传感器的悬臂UNCD结构的方法。

    Method to decrease loss of aluminum and magnesium melts
    34.
    发明授权
    Method to decrease loss of aluminum and magnesium melts 失效
    减少铝和镁熔体损失的方法

    公开(公告)号:US06485541B1

    公开(公告)日:2002-11-26

    申请号:US09632873

    申请日:2000-08-04

    IPC分类号: C22B900

    摘要: A method to minimize oxidation of metal during melting processes is provided, the method comprising placing solid phase metal into a furnace environ-ment, transforming the solid-phase metal into molten metal phase having a molten metal surface, and creating a barrier between the surface and the environment. Also provided is a method for isolating the surface of molten metal from its environment, the method comprising confining the molten metal to a controlled atmos-phere, and imposing a floating substrate between the surface and the atmosphere.

    摘要翻译: 提供了一种在熔融过程中使金属氧化最小化的方法,该方法包括将固相金属放入炉内环境,将固相金属转化成具有熔融金属表面的熔融金属相,并在表面 和环境。 还提供了一种用于从其环境中分离熔融金属的表面的方法,该方法包括将熔融金属限制在受控的大气中,并在表面和大气之间施加浮动的基板。

    High efficiency direct detection of ions from resonance ionization of
sputtered atoms
    36.
    发明授权
    High efficiency direct detection of ions from resonance ionization of sputtered atoms 失效
    高效率直接检测溅射原子的共振电离离子

    公开(公告)号:US4633084A

    公开(公告)日:1986-12-30

    申请号:US691825

    申请日:1985-01-16

    摘要: A method and apparatus are provided for trace and other quantitative analysis with high efficiency of a component in a sample, with the analysis involving the removal by ion or other bombardment of a small quantity of ion and neutral atom groups from the sample, the conversion of selected neutral atom groups to photoions by laser initiated resonance ionization spectroscopy, the selective deflection of the photoions for separation from original ion group emanating from the sample, and the detection of the photoions as a measure of the quantity of the component. In some embodiments, the original ion group is accelerated prior to the RIS step for separation purposes. Noise and other interference are reduced by shielding the detector from primary and secondary ions and deflecting the photoions sufficiently to avoid the primary and secondary ions.

    摘要翻译: 提供了一种方法和装置,用于对样品中组分的高效率进行痕量和其他定量分析,分析涉及通过离子或其他轰击从样品中除去少量离子和中性原子团,转化为 选择的中性原子团通过激光引发的共振电离光谱法进行光致变色,用于与从样品发出的原始离子基团分离的光离子的选择性偏转,以及作为组分量的量度的光电离检测。 在一些实施方案中,在用于分离目的的RIS步骤之前加速原始离子组。 通过将检测器与初级和次级离子屏蔽,并充分偏转光照以避免初级和次级离子,降低了噪声和其他干扰。

    DESIGNED POROSITY MATERIALS IN NUCLEAR REACTOR COMPONENTS
    38.
    发明申请
    DESIGNED POROSITY MATERIALS IN NUCLEAR REACTOR COMPONENTS 有权
    核反应堆组件中的设计孔隙材料

    公开(公告)号:US20150063521A1

    公开(公告)日:2015-03-05

    申请号:US14017173

    申请日:2013-09-03

    IPC分类号: G21C3/18 G21C21/02

    摘要: A nuclear fuel pellet with a porous substrate, such as a carbon or tungsten aerogel, on which at least one layer of a fuel containing material is deposited via atomic layer deposition, and wherein the layer deposition is controlled to prevent agglomeration of defects. Further, a method of fabricating a nuclear fuel pellet, wherein the method features the steps of selecting a porous substrate, depositing at least one layer of a fuel containing material, and terminating the deposition when the desired porosity is achieved. Also provided is a nuclear reactor fuel cladding made of a porous substrate, such as silicon carbide aerogel or silicon carbide cloth, upon which layers of silicon carbide are deposited.

    摘要翻译: 一种具有多孔基材(例如碳或钨气凝胶)的核燃料颗粒,其上通过原子层沉积沉积至少一层含燃料的材料,并且其中控制层沉积以防止缺陷的聚集。 此外,制造核燃料颗粒的方法,其中所述方法的特征在于选择多孔基材,沉积至少一层含燃料的材料的步骤,并且当达到所需孔隙率时终止沉积。 还提供了由多孔基底(例如碳化硅气凝胶或碳化硅布)制成的核反应堆燃料包层,在其上沉积碳化硅层。

    Photo ion spectrometer
    40.
    发明授权
    Photo ion spectrometer 失效
    光离子光谱仪

    公开(公告)号:US4889987A

    公开(公告)日:1989-12-26

    申请号:US14332

    申请日:1987-02-13

    摘要: A charged particle spectrometer for performing ultrasensitive quantitative analysis of selected atomic components removed from a sample. Significant improvements in performing energy and angular refocusing spectroscopy are accomplished by means of a two dimensional structure for generating predetermined electromagnetic field boundary conditions. Both resonance and non-resonance ionization of selected neutral atomic components allow accumulation of increased chemical information. A multiplexed operation between a SIMS mode and a neutral atomic component ionization mode with EARTOF analysis enables comparison of chemical information from secondary ions and neutral atomic components removed from the sample. An electronic system is described for switching high level signals, such as SIMS signals, directly to a transient recorder and through a charge amplifier to the transient recorder for a low level signal pulse counting mode, such as for a neutral atomic component ionization mode.

    摘要翻译: 一种带电粒子光谱仪,用于对从样品中除去的选定的原子成分进行超敏感定量分析。 通过用于产生预定电磁场边界条件的二维结构来实现执行能量和角度重新聚焦光谱的显着改进。 所选择的中性原子组分的共振和非共振电离都允许累积增加的化学信息。 通过EARTOF分析,SIMS模式和中性原子成分离子化模式之间的多路复用操作能够比较从样品中除去的二次离子和中性原子成分的化学信息。 描述了一种电子系统,用于将高电平信号(例如SIMS信号)直接切换到瞬态记录器,并通过电荷放大器切换到瞬态记录器,用于低电平信号脉冲计数模式,例如用于中性原子分量电离模式。