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    • 11. 发明授权
    • Process for controlling aluminum smelting cells
    • 用于控制铝冶炼细胞的方法
    • US5089093A
    • 1992-02-18
    • US481845
    • 1990-02-20
    • Geoffrey I. BlatchMark P. TaylorMark Fyfe
    • Geoffrey I. BlatchMark P. TaylorMark Fyfe
    • C25C3/20
    • C25C3/20
    • A process for controlling an aluminum smelting cell comprising monitoring the cell voltage and current, alumina dumps, additions, operations and anode to cathode distance movements, continuously calculating the cell resistance and the bath resistivity from said monitored cell voltage and current, monitoring the existence of low frequency and high frequency noise in the voltage of the cell, continuously calculating the time rate of change of resistance of the cell, suspending calculation for a predetermined time when an alumina dump, addition, operation or ACD movement occurs, establishing filtered resistance slope thresholds, determining whether the low frequency noise is above a predetermined threshold, and if so, increasing the filtered slope thresholds for low alumina concentration detection, calculating an alumina inventory from the alumina dumps, determining whether the cell is overfed, and if not feeding alumina to prevent an anode affect, calculating the heat supplied and heat required for aluminum production, calculating the heat available for dissipation, calculating the target heat for the cell, calculating the difference between the available heat and the target heat with respect to time, calculating a running heat inventory from the integral of this difference, establishing a target resistance for the cell and modifying that target resistance to achieve a zero heat integral, checking that the target resistance is an allowable value, and moving the anodes of the cell to establish the new target resistance, estimating the time rate of change of bath resistivity and checking whether resistivity and the derivative are greater than predetermined limits, and if so, adjusting the target heat of the cell to maintain the long term heat balance of the cell.
    • 14. 发明授权
    • Reinforced calcium aluminosilicate glass-ceramics
    • 增强铝硅酸铝玻璃陶瓷
    • US4755489A
    • 1988-07-05
    • US943072
    • 1986-12-18
    • Kenneth ChyungKishor P. GadkareeRonald L. StewartMark P. Taylor
    • Kenneth ChyungKishor P. GadkareeRonald L. StewartMark P. Taylor
    • C03C3/062C03C3/097C03C10/00C03C10/06C03C14/00C04B35/56
    • C03C14/002C03C10/0036C03C2214/02C03C2214/06C03C2214/20
    • The present invention is directed to the production of SiC whisker- and/or fiber-reinforced, internally-nucleated glass-ceramic matrix composite articles consisting essentially of 0.5-60% by weight SiC whiskers and/or 15-70% by volume ceramic fibers substantially uniformly distributed in a glass-ceramic matrix consisting essentially, in weight percent on the oxide basis, of 16-20%, CaO, 38.5-46% Al.sub.2 O.sub.3, 35-42% SiO.sub.2, and up to 10% total of at least one nucleating agent in the indicated proportion selected from the group consisting of 0.1-3% Cr.sub.2 O.sub.3, 0.25-3% HfO.sub.2, 2-5% MoO.sub.3, 0.25-3% Nb.sub.2 O.sub.5, 0.25-3% Ta.sub.2 O.sub.5, 0.25-3% WO.sub.3, and 1-10% ZrO.sub.2, wherein Al.sub.2 O.sub.3 is present in an amount which is at least 5 mole percent and up to 50 mole percent in excess of that present in stoichiometric triclinic anorthite, and wherein the predominant crystal phases in the glass-ceramic are triclinic anorthite and mullite and/or .alpha.-Al.sub.2 O.sub.3. Up to 1.5% As.sub.2 O.sub.3 may advantageously be included in the composition.
    • 本发明涉及生产基本上由0.5-60%(重量)SiC晶须和/或15-70%(体积)陶瓷纤维组成的SiC晶须和/或纤维增强的,内部成核的玻璃 - 陶瓷基复合材料 基本上均匀分布在基本上以氧化物为基准重量百分比为16-20%,CaO,38.5-46%Al2O3,35-42%SiO2和至多10%总共的至少一种 指定比例的成核剂选自0.1-3%Cr2O3,0.25-3%HfO2,2.5%MoO3,0.25-3%Nb2O5,0.25-3%Ta2O5,0.23%WO3和1% -10%的ZrO 2,其中Al 2 O 3以至少5摩尔%且高达50摩尔%的量存在于化学计量的三斜钙石中存在,并且其中玻璃 - 陶瓷中的主要结晶相是三斜长岩和 莫来石和/或α-Al2O3。 高达1.5%的As2O3可以有利地包括在组合物中。
    • 17. 发明授权
    • Direct preparation of slurries for ceramic board
    • 直接制备陶瓷板浆
    • US4453981A
    • 1984-06-12
    • US471540
    • 1983-03-02
    • Mark P. Taylor
    • Mark P. Taylor
    • C01B3/42C09C1/02
    • C01B3/42Y10S106/03
    • There is disclosed a method of producing a slurry composed of ion-exchanged, synthetic mica crystals dispersed in a polar liquid. The method comprises providing a synthetic, lithium and/or sodium, water-swelling body of selected crystal type, and dispersing the mica body in the polar liquid while simultaneously effecting an exchange of larger cations from a contacting source with lithium and/or sodium ions from the mica crystals. The synthetic mica body may be vigorously mixed in a dilute solution of the exchangeable ion source. Alternatively, the mica body may be disintegrated in a mixer, the exchangeable ion source added to form a paste and more liquid added to dilute the paste.
    • 公开了一种由分散在极性液体中的离子交换的合成云母晶体构成的浆料的制造方法。 该方法包括提供所选晶体类型的合成,锂和/或钠水溶胀体,并将云母体分散在极性液体中,同时使来自接触源的较大阳离子与锂和/或钠离子交换 从云母晶体。 合成云母体可以在可交换离子源的稀溶液中剧烈混合。 或者,云母体可以在混合器中分解,加入可交换离子源以形成糊料并加入更多的液体以稀释浆料。