摘要:
A conductive paste composition contains a source of an electrically conductive metal, a lead-tellurium-based oxide, a discrete oxide of an adhesion promoting element, and an organic vehicle. An article such as a high-efficiency photovoltaic cell is formed by a process of deposition of the paste composition on a semiconductor substrate (e.g., by screen printing) and firing the paste to remove the organic vehicle and sinter the metal and lead-tellurium-based oxide.
摘要:
The present invention provides a thick-film paste for printing the front side of a solar cell device having one or more insulating layers. The thick-film paste comprises an electrically conductive metal, and a lead-tellurium-lithium-titanium-oxide dispersed in an organic medium.
摘要:
Disclosed herein are new vanadium oxide hydrate compositions highly suitable for use as electrode-active materials in primary and secondary lithium and lithium ion batteries, and a process for their preparation.
摘要:
Procédé amélioré de préparation d'une composition supraconductrice ayant la formule MBa2Cu3Ox, dans laquelle M est sélectionné à partir du groupe se composant de Y, Nd, Sm, Eu, Gd, Dy, Ho, Er, Tm, Yb et Lu, x allant d'environ 6,5 à environ 7,0, ladite composition ayant une température de transition supraconductrice d'environ 90 K. Ledit procédé consiste essentiellement à chauffer une poudre préliminaire dans une atmosphère contenant de l'oxygène, à une température allant d'environ 875°C à environ 950°C pendant une durée suffisante pour former MBa2Cu3Oy, dans laquelle ''y'' va d'environ 6,0 à environ 6,4, et à maintenir la formulation MBa2Cu3Oy dans une atmosphère contenant de l'oxygène tout en effectuant le refroidissement pendant une durée suffisante afin d'obtenir le produit voulu. On prépare ladite poudre préliminaire par (a) mélange de M2O3, de Ba(OH)2.8H2O et de poudres de CuO dans un rapport atomique de M:Ba:Cu d'environ 1:2:3, ou (b) par réalisation d'une solution aqueuse de M(NO3)3, Ba(NO3)2 et Cu(NO3)2 dans un rapport atomique de M:Ba:Cu d'environ 1:2:3. On ajoute ensuite suffisamment de monohydrate d'acide citrique à la solution obtenue afin de transformer les métaux en question en leurs citrates correspondants, puis on sèche par pulvérisation la solution en résultant afin d'obtenir la poudre préliminaire.
摘要:
The present invention provides a thick-film paste for printing the front side of a solar cell device having one or more insulating layers. The thick-film paste comprises an electrically conductive metal, and a lead-tellurium-lithium-oxide dispersed in an organic medium.
摘要:
The present invention provides a thick-film paste for printing the front-side of a solar cell device having one or more insulating layers. The thick-film paste comprises an electrically conductive metal, and a lead-tellurium-oxide dispersed in an organic medium.
摘要:
The present invention provides a thick-film paste for printing the front side of a solar cell device having one or more insulating layers. The thick-film paste comprises an electrically conductive metal and a lead-tellurium-boron-oxide dispersed in an organic medium.
摘要:
Lithium manganese oxide intercalation compounds and methods of their preparation are disclosed. Such compounds are well-suited as electrodes in lithium battery applications. The novel compositions comprise crystallites of spinel Li1+xMn2O4, wherein -0.5∫x∫0.2, wherein the crystallites are characterized as well-shaped octahedra with average maximum crystalline dimension of greater than 2 micrometers and being formed into agglomerates having a surface area of less than 1m2/g.
摘要:
Lithium manganese oxide intercalation compounds and methods of their preparation are disclosed. Such compounds are well-suited as electrodes in lithium battery applications. The novel compositions comprise crystallites of spinel Li1+xMn2O4, wherein -0.5∫x∫0.2, wherein the crystallites are characterized as well-shaped octahedra with average maximum crystalline dimension of greater than 2 micrometers and being formed into agglomerates having a surface area of less than 1m2/g.