Oxide superconductor comprising Cu, Bi, Ca and Sr
    1.
    发明授权
    Oxide superconductor comprising Cu, Bi, Ca and Sr 失效
    包含Cu,Bi,Ca和Sr的氧化物超导体

    公开(公告)号:US5340796A

    公开(公告)日:1994-08-23

    申请号:US976294

    申请日:1992-11-13

    摘要: Novel superconductive oxides are disclosed. The oxides all have layered perovskite-like crystal structure and manifest superconductivity above about 77K. An exemplary material has composition Bi.sub.2.2 Sr.sub.2 Ca.sub.0.8 Cu.sub.2 O.sub.8. Other materials are described by the nominal formula X.sub.2+x M.sub.n-x Cu.sub.n-1 O.sub.2+2n+x/2.+-..delta., where X typically is Bi, or Bi together with Pb or other appropriate substituent, M is one or more divalent ion or mixture of monovalent and trivalent ion, n is an integer greater than 3, x=p/q, where p and q are integers and p

    摘要翻译: 公开了新型超导氧化物。 氧化物都具有层状的钙钛矿晶体结构,超过约77K的超导体。 示例性材料具有组成Bi2.2Sr2Ca0.8Cu2O8。 其他材料由标称式X2 + xMn-xCun-1O2 + 2n + x / 2 +/-δ表示,其中X通常为Bi,或Bi与Pb或其他合适的取代基一起描述,M为一个或多个二价离子或 单价和三价离子的混合物,n是大于3的整数,x = p / q,其中p和q是整数,p

    Transparent conductors comprising gallium-indium-oxide
    7.
    发明授权
    Transparent conductors comprising gallium-indium-oxide 失效
    透明导体,包括镓铟氧化物

    公开(公告)号:US5407602A

    公开(公告)日:1995-04-18

    申请号:US143811

    申请日:1993-10-27

    申请人: Robert J. Cava

    发明人: Robert J. Cava

    摘要: Applicant has discovered that aliovalently doped gallium-indium-oxide (GaInO.sub.3) can achieve electrical conductivity comparable to wide band-gap semiconductors presently in use while exhibiting enhanced transparency and improved index matching. The material can be doped to resistivity of less than 10 milliohm-cm by small quantities of aliovalent dopants, such as tetravalent atoms. It has a refractive index of about 1.6 and can be deposited on glass substrates in polycrystalline films.

    摘要翻译: 申请人已经发现,异价掺杂的镓铟氧化物(GaInO 3)可以实现与目前使用的宽带隙半导体相当的导电性,同时具有增强的透明度和改进的折射率匹配。 该材料可以通过少量的诸如四价原子的低价掺杂剂掺杂到小于10毫欧姆·厘米的电阻率。 折射率约为1.6,可沉积在多晶膜玻璃基板上。

    Compensation of the temperature coefficient of the dielectric constant
of barium strontium titanate
    10.
    发明授权
    Compensation of the temperature coefficient of the dielectric constant of barium strontium titanate 失效
    钛酸钡锶介电常数的温度系数的补偿

    公开(公告)号:US5552355A

    公开(公告)日:1996-09-03

    申请号:US538317

    申请日:1995-10-03

    CPC分类号: C04B35/465 C04B35/499

    摘要: A decrease in the temperature coefficient of the dielectric constant (TCK) for polycrystalline ceramics of Barium Strontium Titanate (BST) through admixture with tetragonal bronze type Barium Strontium Niobate (BSN) has been found. For Ba.sub.0.5 Sr.sub.0.5 TiO.sub.3 ceramics, a 10% admixture of BSN decreases TCK by a factor of 2.5 at 10 MHz, with negligible degradation of the dielectric loss. A 37.5% admixture of BSN decreases TCK by a factor of more than 100. Dielectric constants for the mixtures are in the range of 200-500.

    摘要翻译: 已经发现通过与四方青铜型铌酸钡铌酸钡(BSN)混合,通过与钛酸钡锶(BST)的多晶陶瓷的介电常数(TCK)的温度系数的降低。 对于Ba0.5Sr0.5TiO3陶瓷,10%的BSN混合物在10MHz下将TCK降低2.5倍,介电损耗降低可忽略不计。 BSN的37.5%混合物将TCK降低超过100倍。混合物的介电常数在200-500的范围内。