摘要:
In an apparatus and a method for the analysis of atomic or molecular elements contained in a sample by wavelength dispersive X-ray spectrometry, wherein primary x ray or electron radiation is directed onto the sample whereby fluorescence radiation is emitted from the sample, the fluorescence radiation is directed onto a mirror or focussing device consisting of a multi-layer structure including pairs of layers of which one layer of a pair comprises carbon or scandium and the other comprises a metal oxide or a metal nitride and the fluorescence radiation is reflected from the mirror or focussing device onto an analysis detector for the analysis of the atomic or molecular elements contained in the sample.
摘要:
In a device and a method for the analysis of atomic and molecular elements by way of wavelength dispersive x-ray spectrometric structures including at least one mirror or focussing device having a multi-layer structure onto which fluorescent radiation generated by primary x-ray or electrons beams from a sample to be examined is directed and the reflected fluorescence radiation is supplied to a measuring device for determining the nature of impurities contained in the sample, the multi-layer structure consists of at least a lanthanum layer and a boron carbide layer.
摘要:
The invention relates to a metal-containing, hydrogen-storing material which contains a catalyst for the purpose of hydration or dehydration, said catalyst being a metal carbonate. The method for producing such a metal-containing, hydrogen-storing material is characterized by subjecting the metal-containing material and/or the catalyst in the form of a metal carbonate to a mechanical milling process.
摘要:
In a process of producing nanocrystalline metal hydrides, an elemental metal hydride of a first kind is subjected to a mechanical milling process with at least one elemental metal or at least one additional metal hydride to produce an alloy hydride.
摘要:
The present invention relates to a hydrogen-storing composite material which is convertible essentially reversibly between a storing state and a non-storing state, wherein the reaction enthalpy in this conversion reaction can be set in a targeted manner to a value between 15 and 80 kJ/mol of H2, preferably 25 to 40 kJ/mol of H2. Hydrogen-storing composite materials are characterized in that, in the storing state, they comprise at least one complex metal halide of alkali metal or alkaline earth metal and an element of main group three of the Periodic Table of the Elements and also at least one complex metal hydride of alkali metal or alkaline earth metal and an element of main group three of the Periodic Table of the Elements, or in the storing state at least one metal halohydride of alkali metal or alkaline earth metal and an element of main group three of the Periodic Table of the Elements, and in the non-storing state, at least one alkali metal halide or alkaline earth metal halide and a metal of main group three of the Periodic Table of the Elements.
摘要:
The present invention relates to a hydrogen-storing composite material which is convertible essentially reversibly between a storing state and a non-storing state, wherein the reaction enthalpy in this conversion reaction can be set in a targeted manner to a value between 15 and 80 kJ/mol of H2, preferably 25 to 40 kJ/mol of H2. Hydrogen-storing composite materials are characterized in that, in the storing state, they comprise at least one complex metal halide of alkali metal or alkaline earth metal and an element of main group three of the Periodic Table of the Elements and also at least one complex metal hydride of alkali metal or alkaline earth metal and an element of main group three of the Periodic Table of the Elements, or in the storing state at least one metal halohydride of alkali metal or alkaline earth metal and an element of main group three of the Periodic Table of the Elements, and in the non-storing state, at least one alkali metal halide or alkaline earth metal halide and a metal of main group three of the Periodic Table of the Elements.
摘要:
The present invention concerns a method of activating or regenerating a hydrogen storage material which contains at least one metal hydride. The at least one metal hydride is brought into contact with an inert solvent and the inert solvent is subsequently removed again. After contacting with and removal of the inert solvent, there is not only an increase in the reaction rate but surprisingly the hydrogenation also proceeds more completely. The present method is particularly advantageous when the hydrogen storage material contains at least components which interact with one another during absorption and desorption.
摘要:
The present invention concerns a method of activating or regenerating a hydrogen storage material which contains at least one metal hydride. The at least one metal hydride is brought into contact with an inert solvent and the inert solvent is subsequently removed again. After contacting with and removal of the inert solvent, there is not only an increase in the reaction rate but surprisingly the hydrogenation also proceeds more completely.The present method is particularly advantageous when the hydrogen storage material contains at least components which interact with one another during absorption and desorption.
摘要:
In a metalliferous storage material for hydrogen a metal oxide is provided in or on the surface of the metalliferous materialas a catalyst for the hydrogenation or dehydrogenation of the metalliferous storage material.