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    • 2. 发明授权
    • Device and method for detecting sulfur dioxide at high temperatures
    • 在高温下检测二氧化硫的装置和方法
    • US08048682B2
    • 2011-11-01
    • US12111641
    • 2008-04-29
    • David L. WestFrederick C. MontgomeryTimothy R. Armstrong
    • David L. WestFrederick C. MontgomeryTimothy R. Armstrong
    • G01N30/96G01N7/00G01N33/00
    • G01N27/4074G01N33/0042Y02A50/248Y10T436/186
    • The present invention relates to a method for selectively detecting and/or measuring gaseous SO2 at a temperature of at least 500° C., the method involving: (i) providing a SO2-detecting device including an oxygen ion-conducting substrate having on its surface at least three electrodes comprising a first, second, and third electrode; (ii) driving a starting current of specified magnitude and temporal variation between the first and second electrodes; (iii) contacting the SO2-detecting device with the SO2-containing sample while maintaining the magnitude and any temporal variation of the starting current, wherein said SO2-containing sample causes a change in the electrical conductance of said device; and (iv) detecting the change in electrical conductance of the device based on measuring an electrical property related to or indicative of the conductance of the device between the first and third electrodes, or between the second and third electrodes, and detecting SO2 in the SO2-containing sample based on the measured change in electrical conductance.
    • 本发明涉及一种用于在至少500℃的温度下选择性地检测和/或测量气态SO 2的方法,所述方法包括:(i)提供包含氧离子传导基底的SO 2检测装置, 表面包括第一,第二和第三电极的至少三个电极; (ii)驱动第一和第二电极之间的指定幅度和时间变化的起始电流; (iii)使SO 2检测装置与含SO 2的样品接触,同时保持起始电流的大小和任何时间变化,其中所述含SO 2的样品导致所述装置的电导率的变化; 以及(iv)基于测量与所述第一和第三电极之间或所述第二和第三电极之间的所述器件的电导相关或指示的电特性,并且检测所述SO 2中的SO 2,来检测所述器件的电导率的变化 基于测量的电导率的变化。
    • 8. 发明授权
    • Method for preparing spherical ferrite beads and use thereof
    • 制备球形铁氧体磁珠的方法及其用途
    • US06492016B1
    • 2002-12-10
    • US09917356
    • 2001-07-27
    • Robert J. LaufKimberly K. AndersonFrederick C. MontgomeryJack L. Collins
    • Robert J. LaufKimberly K. AndersonFrederick C. MontgomeryJack L. Collins
    • C01G4906
    • H01F1/11C01G49/0036C01P2002/76C01P2004/20C01P2004/61C01P2004/62Y10T428/256Y10T428/257Y10T428/258Y10T428/2982
    • The invention allows the fabrication of small, dense, highly polished spherical beads of hexagonal ferrites with selected compositions for use in nonreciprocal microwave and mm-wave devices as well as in microwave absorbent or reflective coatings, composites, and the like. A porous, generally spherical bead of hydrous iron oxide is made by a sol-gel process to form a substantially rigid bead having a generally fine crystallite size and correspondingly finely distributed internal porosity. The resulting gel bead is washed and hydrothermally reacted with a soluble alkaline earth salt (typically Ba or Sr) under conditions of elevated temperature and pressure to convert the bead into a mixed hydrous iron-alkaline earth oxide while retaining the generally spherical shape. This mixed oxide bead is then washed, dried, and calcined to produce the desired (BaFe12O19 or SrFe12O19) crystal structure. The calcined bead is then sintered to form a dense bead of the BaFe12O19 and SrFe12O19 phase suitable for polishing and incorporation into various microwave devices and components.
    • 本发明允许制造用于非互易微波和毫米波装置以及微波吸收或反射涂层,复合材料等的选定组合物的小而致密,高度抛光的六方晶系铁氧体球形珠。 通过溶胶 - 凝胶法制备多孔的,通常为球形的含水氧化铁珠,以形成具有通常微细尺寸和相应地精细分布的内部孔隙率的基本刚性的珠粒。 在升高的温度和压力的条件下,将所得凝胶珠洗涤并与可溶性碱土金属盐(通常为Ba或Sr)水热反应,以将珠粒转化为混合的含水铁 - 碱土金属氧化物,同时保持大致球形。 然后将该混合氧化物珠粒洗涤,干燥并煅烧以产生所需的(BaFe12O19或SrFe12O19)晶体结构。 然后将煅烧的珠粒烧结以形成适合抛光并掺入各种微波装置和组件的BaFe12O19和SrFe12O19相的致密珠粒。