摘要:
Iron pentacarbonyl is prepared by reacting iron with carbon monoxide in suspension and in the presence of a mixture of alkali metal sulfide and sulfur as a catalyst.
摘要:
A thermoelectrically active p- or n-conductive semiconductor material is constituted by a ternary compound of the general formula (I) (Pb1-xGex)Te (I) with x value from 0.16 to 0.5, wherein 0 to 10% by weight of the ternary compound may be replaced by other metals or metal compounds, wherein the semiconductor material has a Seebeck coefficient of at least ±200 μV/K at a temperature of 25° C.
摘要:
In a photovoltaic cell having a photovoltaically active semiconductor material constituted by a plurality of metals or metal oxides, the photovoltaically active material is selected from a p- or n-doped semiconductor material constituted by a ternary compound of the general formula (I) MexSAySBz (I) with Me=Al, Ti, Zr, V, Nb, Ta, Cr, Mo, W, Mn, Fe, Co, Ni, Cu or Ag, SA, SB=B, C, Si, Ge, Sb, Se or Te, where SA and SB respectively come from different groups of the periodic table, x, y, z are independent of one another and can take values from 0.01 to 1, and where the proportion by weight of SA and SB together is no more than 30%, expressed in terms of the total semiconductor material, or a mixed oxide of the general formula (II) [ ( CaO ) u · ( SrO ) v · ( BaO ) w · ( 1 / 2 Bi 2 O 3 ) x ] f · 2 n + a 2 · ( { k } · Me n O n 2 { 2 - k } · Me n + a O n + a 2 ) ( II ) with Me=Fe, Cu, V, Mn, Sn, Ti, Mo, W n=integer from 1 to 6, a=1 or 2, f=number from 0.2 to 5, k=number from 0.01 to 2, u+v+w+x=1.
摘要:
Capacitors having an inert porous shaped body onto which a first electrically conductive layer, a second layer of barium titanate and a further electrically conductive layer have been applied.
摘要:
Iron pentacarbonyl is prepared by reacting iron with carbon monoxide in suspension and in the presence of a polysulfide of the general formula RSxR′ as a catalyst, where R is an organic radical and x is a number from 2 to 8.
摘要翻译:铁五羰基通过使铁与一氧化碳在悬浮液中反应并在通式为RS x R R'的多硫化物的存在下反应制备,其中R是有机基团,x是从 2到8。
摘要:
In a thermoelectric generator or Peltier arrangement having a thermoelectrically active semiconductor material constituted by a plurality of metals or metal oxides the thermoelectrically active material is selected from a p- or n-doped semiconductor material constituted by a ternary compound of the general formula (I) MexSAySBz (I) with Me=Al, Ti, Zr, V, Nb, Ta, Cr, Mo, W, Mn, Fe, Co, Ni, Cu or Ag, SA, SB=B, C, Si, Ge, Sb, Se or Te, where SA and SB respectively come from different groups of the periodic table, x, y, z independently of one another have values from 0.01 to 1, and where the proportion by weight of SA and SB together is no more than 30%, expressed in terms of the total semiconductor material, except for ternary compounds constituted by AlB12 and SiB6, or a mixed oxide of the general formula (II) [ ( CaO ) u · ( SrO ) v · ( BaO ) w · ( 1 / 2 Bi 2 O 3 ) x ] f · 2 n + a 2 · ( { k } Me n O n 2 · { 2 - k } Me n + a O n + a 2 ) ( II ) with Me=Fe, Cu, V, Mn, Sn, Ti, Mo, W n=integer from 1 to 6, a=1 or 2, f=number from 0.2 to 5, k=number from 0,01 to 2, u+v+w+x=1.
摘要:
For a process for reducing the thermal conductivity and for increasing the thermoelectric efficiency of thermoelectric materials based on lead chalcogenides or skutterudites, the thermoelectric materials are extruded at a temperature below their melting point and a pressure in the range from 300 to 1 000 MPa.
摘要:
The invention relates to a capacitor having a porous electrically conductive substrate on whose inner and outer surfaces a first layer of a dielectric and an electrically conductive second layer are applied.The invention also relates to a method for the production of such capacitors and to their use in electrical and electronic circuits.
摘要:
The invention relates to a photovoltaic cell and to a process for producing a photovoltaic cell comprising a photovoltaically active semiconductor material of the formula (I) or (II): ZnTe (I) Zn1-xMnxTe (II) where x is from 0.01 to 0.7, wherein the photovoltaically active semiconductor material comprises a metal halide comprising a metal selected from the group consisting of germanium, tin, antimony, bismuth and copper and a halogen selected from the group consisting of fluorine, chlorine, bromine and iodine
摘要:
The invention relates to the thermally stable contacting of semiconductive alloys for use in thermoelectric generators and Peltier arrangements by means of soldering, and to processes for producing thermoelectric modules using a barrier layer composed of borides, nitrides, carbides, phosphides and/or silicides.