Method of preparing pressureless sintered, highly dense boron carbide materials
    51.
    发明授权
    Method of preparing pressureless sintered, highly dense boron carbide materials 失效
    制备无压烧结,高密度碳化硼材料的方法

    公开(公告)号:US07919040B2

    公开(公告)日:2011-04-05

    申请号:US12221916

    申请日:2008-08-07

    IPC分类号: B28B3/00

    摘要: In a method of preparing a boron carbide material, boron carbide powder is washed with essentially pure water at an elevated temperature to generate washed boron carbide powder. The washed boron carbide powder is combined with a sintering aid. The mixture of the boron carbide powder and the sintering aid is pressed to form a shaped material, and the shaped material is sintered. A sintered boron carbide material comprises a boron carbide component that includes boron carbide, elemental carbon, and not more than about 0.6 wt % of oxygen on the basis of the total weight of the boron carbide component. The sintered boron carbide material has a density of at least about 99% of the theoretical density. Another sintered boron carbide material comprises a boron carbide component that includes boron carbide, silicon carbide, elemental carbon, and not more than about 0.3 wt % oxygen on the basis of the total weight of the boron carbide component, and has a density of at least about 97% of the theoretical density.

    摘要翻译: 在制备碳化硼材料的方法中,碳化硼粉末在高温下用基本上纯的水洗涤以产生洗涤的碳化硼粉末。 将洗涤的碳化硼粉末与烧结助剂组合。 将碳化硼粉末和烧结助剂的混合物压制以形成成形材料,并将成形材料烧结。 烧结碳化硼材料包括碳化硼组分,其包含碳化硼,元素碳,基于碳化硼组分的总重量不超过约0.6重量%的氧。 烧结碳化硼材料的密度至少为理论密度的约99%。 另一种烧结碳化硼材料包括碳化硼组分,其包含碳化硼,碳化硅,元素碳和基于碳化硼组分的总重量不大于约0.3重量%的氧,并且至少具有至少 约97%的理论密度。

    Aerogel and xerogel composites for use as carbon anodes
    52.
    发明授权
    Aerogel and xerogel composites for use as carbon anodes 有权
    气凝胶和干凝胶复合材料用作碳阳极

    公开(公告)号:US07811711B2

    公开(公告)日:2010-10-12

    申请号:US12118571

    申请日:2008-05-09

    IPC分类号: H01M4/88 H01M8/14

    摘要: A method for forming a reinforced rigid anode monolith and fuel and product of such method. The method includes providing a solution of organic aerogel or xerogel precursors including at least one of a phenolic resin, phenol (hydroxybenzene), resorcinol(1,3-dihydroxybenzene), or catechol(1,2-dihydroxybenzene); at least one aldehyde compound selected from the group consisting of formaldehyde, acetaldehyde, and furfuraldehyde; and an alkali carbonate or phosphoric acid catalyst; adding internal reinforcement materials comprising carbon to said precursor solution to form a precursor mixture; gelling said precursor mixture to form a composite gel; drying said composite gel; and pyrolyzing said composite gel to form a wettable aerogel/carbon composite or a wettable xerogel/carbon composite, wherein said composites comprise chars and said internal reinforcement materials, and wherein said composite is suitable for use as an anode with the chars being fuel capable of being combusted in a molten salt electrochemical fuel cell in the range from 500 C to 800 C to produce electrical energy. Additional methods and systems/compositions are also provided.

    摘要翻译: 一种用于形成强化刚性阳极整料和燃料的方法及其制造方法。 该方法包括提供有机气凝胶或干凝胶前体的溶液,其包括酚醛树脂,苯酚(羟基苯),间苯二酚(1,3-二羟基苯)或邻苯二酚(1,2-二羟基苯)中的至少一种; 至少一种选自甲醛,乙醛和糠醛的醛化合物; 和碱金属碳酸盐或磷酸催化剂; 向所述前体溶液中加入包含碳的内部增强材料以形成前体混合物; 胶凝所述前体混合物形成复合凝胶; 干燥所述复合凝胶; 并且热解所述复合凝胶以形成可湿性气凝胶/碳复合材料或可湿性干凝胶/碳复合材料,其中所述复合材料包含炭和所述内部增强材料,并且其中所述复合材料适合用作阳极, 在熔融盐电化学燃料电池中在500℃至800℃范围内燃烧以产生电能。 还提供了附加的方法和系统/组合物。

    Method of Preparing Stable Oxide Ceramic Precursor Sol-Gel Solutions Based on Lead, Titanium, Zirconium and Lanthanide(s) and Method of Preparing Said Ceramic
    55.
    发明申请
    Method of Preparing Stable Oxide Ceramic Precursor Sol-Gel Solutions Based on Lead, Titanium, Zirconium and Lanthanide(s) and Method of Preparing Said Ceramic 审中-公开
    制备基于铅,钛,锆和镧系元素的稳定氧化物陶瓷前体溶胶 - 凝胶溶液的方法和制备所述陶瓷的方法

    公开(公告)号:US20080175985A1

    公开(公告)日:2008-07-24

    申请号:US11883145

    申请日:2006-01-27

    IPC分类号: B05D5/12 B01J13/00

    摘要: The invention relates to a method of preparing a stable sol-gel solution as precursor of an oxide ceramic based on lead, titanium, zirconium and one or more lanthanides, comprising, in succession, the following steps: a) a sol-gel solution is prepared by bringing a lead-containing molecular precursor, a titanium-containing molecular precursor, a zirconium-containing molecular precursor and a lanthanide-metal-containing molecular precursor into contact with a medium comprising a diol solvent and optionally an aliphatic monoalcohol; b) the solution obtained in step a) is left to stand for a sufficient time needed to obtain a solution having an approximately constant viscosity; and c) the solution obtained in step b) is diluted to a predetermined amount with a diol solvent identical to that of step a) or a solvent miscible with this solvent. Application to the preparation of an oxide ceramic material comprising lead, a lanthanide metal, titanium and zirconium.

    摘要翻译: 本发明涉及一种制备基于铅,钛,锆和一种或多种镧系元素的氧化物陶瓷前体的稳定溶胶 - 凝胶溶液的方法,该方法包括以下步骤:a)溶胶 - 凝胶溶液 通过将含铅分子前体,含钛分子前体,含锆分子前体和含镧系金属的分子前体与包含二醇溶剂和任选的脂族一元醇的介质接触来制备; b)将步骤a)中获得的溶液静置足以获得具有近似恒定粘度的溶液所需的时间; 和c)将步骤b)中获得的溶液用与步骤a)相同的二醇溶剂或与该溶剂混溶的溶剂稀释至预定量。 适用于制备包含铅,镧系金属,钛和锆的氧化物陶瓷材料。