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    • 5. 发明授权
      US5322559A Negative thermal expansion material 失效
    • Negative thermal expansion material
    • 负热膨胀材料
    • US5322559A
    • 1994-06-21
    • US60567
    • 1993-05-11
    • Arthur W. Sleight
    • Arthur W. Sleight
    • C01B25/45 , C04B35/447
    • C04B35/447 , C01B25/45
    • Compounds that satisfy the general formula A.sub.1-Y.sup.4+ A.sub.Y.sup.1+ A.sub.Y.sup.3+ V.sub.2-X P.sub.X O.sub.7 exhibit isotropic NTE behavior in the range of normal ambient temperatures. Y is from about 0.0 to about 0.4, and more preferably is about 0.2. X is from about 0.6 to about 1.4, and is more preferably about 1. Particularly suitable NTE compounds have X about 1 and Y about 0. A.sup.4+ is selected from the group consisting of Hf, Zr, Zr.sub.a M.sub.b, Hf.sub.a M.sub.b and mixtures thereof wherein a plus b equals one and M is selected from the group consisting of Ti, Ce, Th, U, Mo, Pt, Pb, Sn, Ge and Si. More preferably, A.sup.4+ is selected from the group consisting of Hf and Zr. A.sup.1+ is selected from the group consisting of the alkali earth metals, and A.sup.3+ is selected from the group consisting of the rare earth metals. Such NTE materials exhibit isotropic negative linear expansion at a temperature below about 100.degree. C. The NTE materials also may be incorporated into compositions such as epoxy and ceramic compositions.
    • 满足通式A1-Y4 + AY1 + AY3 + V2-XPXO7的化合物在正常环境温度范围内表现出各向同性的NTE行为。 Y为约0.0至约0.4，更优选为约0.2。 X为约0.6至约1.4，更优选为约1.特别合适的NTE化合物具有X约1且Y约为0. A4 +选自Hf，Zr，ZraMb，HfaMb及其混合物，其中加号 b等于1，M选自Ti，Ce，Th，U，Mo，Pt，Pb，Sn，Ge和Si。 更优选地，A4 +选自Hf和Zr。 A1 +选自碱土金属，A3 +选自稀土金属。 这种NTE材料在低于约100℃的温度下表现出各向同性的负线性膨胀.NTE材料也可以掺入组合物如环氧树脂和陶瓷组合物中。
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Global Dossier Espacenet 法律信息 同族专利 专利引用
    • 6. 发明授权
      US5433778A Negative thermal expansion material 失效
    • Negative thermal expansion material
    • 负热膨胀材料
    • US5433778A
    • 1995-07-18
    • US241263
    • 1994-05-11
    • Arthur W. Sleight
    • Arthur W. Sleight
    • C01B25/45 , C04B35/447 , C01G28/02
    • C01B25/45 , C04B35/447
    • Compounds that satisfy the general formula A.sub.1-Y.sup.4+ A.sub.Y.sup.1+ A.sub.Y.sup.3+ V.sub.2-X E.sub.X O.sub.7 exhibit isotropic NTE behavior above a temperature of about 100.degree. C. Y is from about 0.0 to about 0.4, and more preferably is about 0.2. X is from about 0.6 to about 1.4, and is more preferably about 1. Particularly suitable NTE compounds have X about 1 and Y about 0. A.sup.4+ is selected from the group consisting of Hf, Zr, Zr.sub.a M.sub.b, Hf.sub.a M.sub.b and mixtures thereof wherein a plus b equals one and M is selected from the group consisting of Ti, Ce, Th, U, Mo, W, Pb, Sn, Ge and Si. More preferably, A.sup.4+ is selected from the group consisting of Hf and Zr. A.sup.1+ is selected from the group consisting of the alkali earth metals, A.sup.3+ is selected from the group consisting of the rare earth metals, and E is selected from the group consisting of P and As. The NTE materials may be incorporated into compositions such as epoxy and ceramic compositions.
    • 满足通式A1-Y4 + AY1 + AY3 + V2-XEXO7的化合物在约100℃的温度下表现出各向同性的NTE行为.Y为约0.0至约0.4，更优选为约0.2。 X为约0.6至约1.4，更优选为约1.特别合适的NTE化合物具有X约1且Y约为0. A4 +选自Hf，Zr，ZraMb，HfaMb及其混合物，其中加号 b等于1，M选自Ti，Ce，Th，U，Mo，W，Pb，Sn，Ge和Si。 更优选地，A4 +选自Hf和Zr。 A1 +选自碱土金属，A3 +选自稀土金属，E选自P和As。 NTE材料可以掺入到诸如环氧树脂和陶瓷组合物的组合物中。
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Global Dossier Espacenet 法律信息 同族专利 专利引用
    • 7. 发明授权
      US06183716B2 Solution method for making molybdate and tungstate negative thermal expansion materials and compounds made by the method 失效
    • Solution method for making molybdate and tungstate negative thermal expansion materials and compounds made by the method
    • 通过该方法制备钼酸盐和钨酸盐负热膨胀材料和化合物的溶液方法
    • US06183716B2
    • 2001-02-06
    • US09126986
    • 1998-07-30
    • Arthur W. Sleight , Claire E. Closmann , John C. Haygarth , Kameswari Upadhyayula
    • Arthur W. Sleight , Claire E. Closmann , John C. Haygarth , Kameswari Upadhyayula
    • C01G3900
    • C01G39/006 , C01G39/00 , C01G41/00 , C01G41/006 , C01P2002/72 , C01P2002/77 , C01P2006/10 , G01K5/48
    • A method for making negative thermal expansion materials having the formula A 4 + ⁢ M 2 6 + ⁢ O 8 where A4+ is Zr4+, Hf4+, or mixtures thereof, and M6+ is Mo6+, W6+, or mixtures thereof, is described. The method comprises first forming an acidic, liquid mixture comprising stoichiometric amounts of (1) a soluble source of Zr4+, Hf4+, or mixtures thereof, and (2) a sodium-ion-free tungstate salt, a sodium-ion-free molybdate salt, or mixtures thereof. This liquid mixture is then heated, either at reflux temperature or in a closed system at pressures greater than ambient, to produce a solid fraction. The solid fraction is separated from the liquid mixture and heated a second time at a temperature and for a period of time sufficient to form compounds having the formula A 4 + ⁢ M 2 6 + ⁢ O 8 . The solid fraction generally is heated within the temperature range of from about 500° C. to less than about 700° C. An alternative embodiment of the method involves adding a fuel material to the materials listed above before the final heating step. A currently preferred fuel material is urea. The fuel material apparently undergoes an exothermic reaction that provides additional energy to help produce the desired compound. The use of the fuel has substantially reduced the reaction time, such as to less than an hour, and in certain embodiments the first heating cycle has been completed in about fifteen minutes. Novel negative thermal expansion materials made by the method also are described. Such novel negative thermal expansion materials have the formula A 1 - x 4 + ⁢ A x ′4 + ⁢ M 2 - y 6 + ⁢ M y ′6 + ⁢ O 8 where A4+ and A′4+ are Hf4+ or Zr4+, M6+ and M′6+ are W6+ or Mo6+, X is from 0 to 1, and Y is from about 0.05 to ≦2.
    • 描述了制备具有方形区域A4 +的负热膨胀材料的方法是Zr4 +，Hf4 +或其混合物，并且M6 +是Mo6 +，W6 +或其混合物。 该方法包括首先形成含有化学计量的（1）Zr4 +，Hf4 +或其混合物的可溶性源的酸性液体混合物，和（2）不含钠离子的钨酸盐，不含钠离子的钼酸盐 ，或其混合物。 然后将该液体混合物在回流温度下或在密闭系统中在高于环境温度的压力下加热，以产生固体部分。 将固体部分与液体混合物分离并在足以形成具有下式的化合物的温度下加热第二次固体部分通常在约500℃至小于约的温度范围内加热 700℃。该方法的替代实施例包括在最终加热步骤之前向上述材料添加燃料材料。 目前优选的燃料是尿素。 燃料材料显然经历放热反应，提供额外的能量以帮助产生所需化合物。 燃料的使用大大减少了反应时间，例如至少一小时，在某些实施方案中，第一加热循环已经在约十五分钟内完成。 还描述了通过该方法制造的新型负热膨胀材料。 这种新的负热膨胀材料具有A4 +和A'4 +为Hf4 +或Zr4 +，M6 +和M'6 +为W6 +或Mo6 +，X为0至1，Y为约0.05至≤2。
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Espacenet 法律信息 同族专利 专利引用
    • 10. 发明授权
      US5919720A Materials with low or negative thermal expansion 失效
    • Materials with low or negative thermal expansion
    • US5919720A
    • 1999-07-06
    • US59679
    • 1998-04-13
    • Arthur W. Sleight , Mary A. Thundathil , John S. O. Evans
    • Arthur W. Sleight , Mary A. Thundathil , John S. O. Evans
    • C04B35/495 , H05K1/03 , C04B35/10
    • C04B35/495 , H05K1/0306
    • Low or negative thermal expansion compounds are described having a formula of A.sub.2-x.sup.3+ A.sub.y.sup.4+ M.sub.z.sup.3+ M.sub.3-y.sup.6+ P.sub.y O.sub.12. It currently is believed that y can vary from about 0 to about 2, x equals the sum of y and z and varies from about 0.1 to about 1.9. Without limitation, novel compounds satisfying the formula A.sub.2-x.sup.3+ A.sub.y.sup.4+ M.sub.z.sup.3+ M.sub.3-y.sup.6+ P.sub.y O.sub.12 where y=0 may be selected from the group consisting of Al.sub.1.5 In.sub.0.5 W.sub.3 O.sub.12, Al.sub.1.6 In.sub.0.4 W.sub.3 O.sub.12, Al.sub.1.7 In.sub.0.3 W.sub.3 O.sub.12, Al.sub.1.8 In.sub.0.2 W.sub.3 O.sub.12, YAlW.sub.3 O.sub.12, ScAlW.sub.3 O.sub.12, ScGaW.sub.3 O.sub.12, ScInW.sub.3 O.sub.12, ScHoW.sub.3 O.sub.12, ScYbMo.sub.3 O.sub.12 and ErInW.sub.3 O.sub.12. Without limitation, novel compounds satisfying the formula A.sub.2-x.sup.3+ A.sub.y.sup.4+ M.sub.z.sup.3+ M.sub.3-y.sup.6+ P.sub.y O.sub.12 where y=2 may be selected from the group consisting of Hf.sub.2 WP.sub.2 O.sub.12 and Hf.sub.2 MoP.sub.2 O.sub.12. The present invention also provides compositions useful for decreasing the positive thermal expansion of a material or materials included in the compositions. The compositions comprise at least a first material and a second material where the first material has low or negative thermal expansion properties and the second material exhibits positive thermal expansion. Novel compositions and methods for making and using such compositions can be made using a first material selected, without limitation, from the group consisting of Al.sub.2 W.sub.3 O.sub.12, Al.sub.2 Mo.sub.3 O.sub.12, In.sub.2 W.sub.3 O.sub.12, Al.sub.1.5 In.sub.0.5 W.sub.3 O.sub.12, Al.sub.1.6 In.sub.0.4 W.sub.3 O.sub.12, Al.sub.1.7 In.sub.0.3 W.sub.3 O.sub.12, Al.sub.1.8 In.sub.0.2 W.sub.3 O.sub.12, YAlW.sub.3 O.sub.12, ScAlW.sub.3 O.sub.12, ScGaW.sub.3 O.sub.12, ScInW.sub.3 O.sub.12, ScHoW.sub.3 O.sub.12, ScYbMo.sub.3 O.sub.12, ErInW.sub.3 O.sub.12, Al.sub.1.68 Sc.sub.0.02 In.sub.0.3 W.sub.3 O.sub.12, Zr.sub.2 WP.sub.2 O.sub.12, Zr.sub.2 MoP.sub.2 O.sub.12, Hf.sub.2 WP.sub.2 O.sub.12 and Hf.sub.2 MoP.sub.2 O.sub.12. A general method for making compounds having low or negative thermal expansion, and compositions containing such compounds, also is described. The first step of the method comprises purposefully designing compounds to be low or negative thermal expansion compounds according to rules derived empirically. The second step comprises making those compounds designed according to the rules. Examples of negative thermal expansion materials made by such method include NbO.sub.2 F and TaO.sub.2 F.
    • 基本信息 添加关注 加入工作空间 PDF全文 PDF下载 全文下载 相似专利 双屏查看 权利要求书 说明书全文 Global Dossier Espacenet 法律信息 同族专利 专利引用
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