摘要:
Structure of the insulator--semiconductor type constituted by a semiconducting crystalline substrate formed from a III-V compound of formula (A.sup.III B.sup.V) coated with an insulating layer, wherein the substrate has a specific crystalline orientation and wherein the insulator is a sulphide in accordance with the formula (A.sup.III B.sup.V)S.sub.4.It also relates to a process for the preparation of such a structure.Applications of the invention occur in the fields of microelectronics and optoelectronics.
摘要:
This invention relates to a corrosion inhibitor for protecting metallic surfaces which are in contact with water, in particular circuits, apparatus and devices which use water as energetic or thermic fluid, said corrosion inhibitor being a fluorophosphate compound selected from the group consisting of:(i) compound of the formula M.sub.2.sup.I PO.sub.3 F, xH.sub.2 O(ii) compound of the formula LiM.sup.I PO.sub.3 F, xH.sub.2 O(iii) compound of the formula NaM.sup.I PO.sub.3 F, xH.sub.2 O(iv) compound of the formula M.sup.II PO.sub.3 F, xH.sub.2 O(v) compound of the formula M.sub.2.sup.I M.sup.II (PO.sub.3 F).sub.2, xH.sub.2 O(vi) compound of the formula M.sup.I PO.sub.2 F.sub.2, xH.sub.2 O(vii) compound of the formula M.sup.II (PO.sub.2 F.sub.2).sub.2, x H.sub.2 O(wherein M.sup.I is Na, K, Rb, Cs or HN.sub.4 ; M.sup.II is Mg, Ca, Ba, Sr, Zn, Cd, Mn, Ni or Co; and x is an integer or a fractional number comprised between 0 and 6) and(viii) mixtures thereof.
摘要翻译:本发明涉及用于保护与水接触的金属表面的腐蚀抑制剂,特别是使用水作为能量或热流体的电路,设备和装置,所述腐蚀抑制剂是选自以下的氟磷酸盐化合物:(i (Ⅹ)式NaMIPO3F,xH2O化合物(ⅳ)式MIIPO3F化合物,xH2O(Ⅴ)式M2IMII(PO3F)2化合物 ,xH 2 O(vi)式MIPO 2 F 2的化合物,xH 2 O(vii)式MII(PO 2 F 2)2的化合物,x H 2 O(其中MI是Na,K,Rb,Cs或HN 4; MII是Mg,Ca,Ba,Sr ,Zn,Cd,Mn,Ni或Co; x是0至6之间的整数或分数)和(viii)其混合物。
摘要:
An electrode for an alkali fuel cell comprises an active layer formed by a bilayer or by a stack of a plurality of bilayers. Each bilayer is composed of a catalytic layer comprising catalyst particles of nanometric size and of a porous layer comprising two opposite faces one of which is in contact with the catalytic layer. The porous layer is made from a porous composite material comprising a hydroxide ion conducting polymer matrix in which a metallic lattice is formed constituting a plurality of electronically conducting paths connecting the two opposite faces of the porous layer. Advantageously, fabrication of such an electrode is obtained by successively performing vacuum deposition of the catalyst particles and vacuum co-deposition of the hydroxide ion conducting polymer and of the metal on a free surface of a support.
摘要:
An electrode for an alkali fuel cell comprises an active layer formed by a bilayer or by a stack of a plurality of bilayers. Each bilayer is composed of a catalytic layer comprising catalyst particles of nanometric size and of a porous layer comprising two opposite faces one of which is in contact with the catalytic layer. The porous layer is made from a porous composite material comprising a hydroxide ion conducting polymer matrix in which a metallic lattice is formed constituting a plurality of electronically conducting paths connecting the two opposite faces of the porous layer. Advantageously, fabrication of such an electrode is obtained by successively performing vacuum deposition of the catalyst particles and vacuum co-deposition of the hydroxide ion conducting polymer and of the metal on a free surface of a support.
摘要:
A method comprising the following steps: placing the substrates in an evacuated enclosures; forming a gas by evaporating a component that is liquid at atmospheric pressure and at ambient temperature; and introducing the gas into the enclosure. The gas is decomposed and a complementary gas is introduced into the enclosure for the purpose of reacting with the decomposed gas so as to form at least one thin layer on the substrate. Also disclosed is a method of forming a colored film and to an associated device capable of implementing the method of the invention.