摘要:
The invention relates to a lubricating metal coating and to a process for its preparation. The material constituting the coating in a composite material comprising a metal matrix within which talc particles are distributed as lamellae, the metal matrix being composed of a metal chosen from Fe, Co, Ni, Mn, Cr, Cu, W, Mo, Zn, Au, Ag, Pb or Sn or of an alloy of these metals or of a metal/semimetal alloy. The coating is obtained by a process consisting in carrying out an electrolytic deposition using a solution of precursors of the metal matrix of the coating which additionally comprises talc particles in suspension, which particles are modified at the surface by irreversible adsorption of a cellulose-derived compound by replacement of all or part of the hydroxyl groups.
摘要:
The invention relates to a lubricating metal coating and to a process for its preparation. The material constituting the coating in a composite material comprising a metal matrix within which talc particles are distributed as lamellae, the metal matrix being composed of a metal chosen from Fe, Co, Ni, Mn, Cr, Cu, W, Mo, Zn, Au, Ag, Pb or Sn or of an alloy of these metals or of a metal/semimetal alloy. The coating is obtained by a process consisting in carrying out an electrolytic deposition using a solution of precursors of the metal matrix of the coating which additionally comprises talc particles in suspension, which particles are modified at the surface by irreversible adsorption of a cellulose-derived compound by replacement of all or part of the hydroxyl groups.
摘要:
The invention relates to a method for preparing a synthetic talc composition. According to said method, a kerolite composition is subjected to an anhydrous thermal treatment carried out at a pressure lower than 5 bar, from over a few hours up to over a few days, at a treatment temperature higher than 300° C. The invention also relates to a synthetic talc composition prepared in this way, the synthetic talc particles of the composition being exclusively of chemical formula —(Si4)Mg3O10(OH)2— and identifiable, during X-ray diffraction, by the presence of a characteristic diffraction peak located at a distance of between 9.40-9.68 and corresponding to a plane (001). Said synthetic talc particles also have a thermally stable crystalline structure of stacked laminae, which is very similar to that of a natural talc and has a particle size smaller than approximately ten micrometers.
摘要翻译:本发明涉及一种制备合成滑石组合物的方法。 根据所述方法,在高于300℃的处理温度下,在低于5巴的压力下进行无水热处理,从超过几个小时至多数天,进行无水热处理。本发明还 涉及以这种方式制备的合成滑石组合物,该组合物的合成滑石颗粒仅在化学式(Si 4)Mg 3 O 10(OH)2)中,并且在X射线衍射过程中可通过存在特征衍射峰 位于9.40-9.68之间的距离,对应于平面(001)。 所述合成滑石颗粒也具有堆叠薄片的热稳定结晶结构,其与天然滑石非常相似,并且具有小于约十微米的粒度。
摘要:
The invention relates to a method for preparing a synthetic talc composition. According to said method, a kerolite composition is subjected to an anhydrous thermal treatment carried out at a pressure lower than 5 bar, from over a few hours up to over a few days, at a treatment temperature higher than 300° C. The invention also relates to a synthetic talc composition prepared in this way, the synthetic talc particles of the composition being exclusively of chemical formula —(Si4)Mg3O10(OH)2— and identifiable, during X-ray diffraction, by the presence of a characteristic diffraction peak located at a distance of between 9.40-9.68 and corresponding to a plane (001). Said synthetic talc particles also have a thermally stable crystalline structure of stacked laminae, which is very similar to that of a natural talc and has a particle size smaller than approximately ten micrometers.
摘要翻译:本发明涉及一种制备合成滑石组合物的方法。 根据所述方法,在高于300℃的处理温度下,在低于5巴的压力下进行无水热处理,从超过几个小时至多数天,进行无水热处理。本发明还 涉及以这种方式制备的合成滑石组合物,该组合物的合成滑石颗粒仅在化学式(Si 4)Mg 3 O 10(OH)2)中,并且在X射线衍射过程中可通过存在特征衍射峰 位于9.40-9.68之间的距离,对应于平面(001)。 所述合成滑石颗粒也具有堆叠薄片的热稳定结晶结构,其与天然滑石非常相似,并且具有小于约十微米的粒度。
摘要:
The invention relates to a method for preparing a composition, that is a talcose composition, comprising synthetic mineral particles which contain silicon, germanium and metal, have a crystalline and lamellar structure, and are of formula (SixGe1−x)4M3O10(OH)2, wherein M is at least one divalent metal and is of formula Mgy(1)COy(2)Zny(3)Cuy(4)Mny(5)Fey(6)Niy(7)Cry(8), and x is a real number of the interval [0; 1]. According to said method, a gel containing silicon, germanium and metal, of formula —(SixGe1−x)4M3O11, n′H2O—, in the liquid state, is subjected to a hydrothermal treatment over a defined period of time and at a temperature of between 300° C. and 600° C., said time and temperature being selected according to the desired particle size and structural stability for the mineral particles containing silicon, germanium and metal, to be prepared.
摘要:
A method for preparing a composition including mineral particles, that is swelling TOT-TOT interlayer particles, formed by interlayering between: at least one non-swelling mineral phase formed by a stack of elementary laminae of the phyllogermanosilicate 2/1 type and of formula —(SixGe1−x) 4M3O10(OH)2—, and at least one swelling mineral phase formed by a stack of elementary laminae of the phyllogermanosilicate 2/1 type and at least one interlaminar space between two consecutive elementary laminae, the swelling mineral phase being of formula —(SixGe1−x)4M3−εO10(OH)2, (M2+)ε′.nH2O. The composition is prepared by subjecting a gel containing silicon, germanium and metal, of chemical formula —(SixGe1−x)4M3O11,nH2O—, in the liquid state to a hydrothermal treatment which is carried out over a defined period of time and at a temperature of between 150° C. and 300° C., the time and temperature being selected according to the desired structural characteristics for the swelling TOT-TOT interlayer particles to be prepared.
摘要:
The invention relates to a method for preparing a composition, that is a talcose composition, comprising synthetic mineral particles which contain silicon, germanium and metal, have a crystalline and lamellar structure, and are of formula (SixGe1−x)4 M3O10(OH)2, wherein M is at least one divalent metal and is of formula Mgy(1)COy(2)Zny(3)Cuy(4)Mny(5)Fey(6)Niy(7)Cry(8), and x is a real number of the interval [0; 1]. According to said method, a gel containing silicon, germanium and metal, of formula —(SixGe1−x)4M3O11, n′H2O—, in the liquid state, is subjected to a hydrothermal treatment over a defined period of time and at a temperature of between 300° C. and 600° C., said time and temperature being selected according to the desired particle size and structural stability for the mineral particles containing silicon, germanium and metal, to be prepared.
摘要:
The invention relates to a method for preparing a composition comprising mineral particles, that is swelling TOT-TOT interlayer particles, formed by interlayering between: at least one non-swelling mineral phase formed by a stack of elementary laminae of the phyllogermanosilicate 2/1 type and of formula —(SixGe1-x)4M3O10(OH)2—, and at least one swelling mineral phase formed by a stack of elementary laminae of the phyllogermanosilicate 2/1 type and at least one interlaminar space between two consecutive elementary laminae, said swelling mineral phase being of formula —(SixGe1-x)4M3-εO10(OH)2, (M2+)ε′.nH2O. In order to prepare said composition, a gel containing silicon, germanium and metal, of chemical formula —(SixGe1-x)4M3O11,nH2O—, in the liquid state, is subjected to a hydrothermal treatment which is carried out over a defined period of time and at a temperature of between 150° C. and 300° C., said time and temperature being selected according to the desired structural characteristics for the swelling TOT-TOT interlayer particles to be prepared.
摘要:
A composite material includes a metal matrix in which synthetic lamellar phyllosilicated mineral particles are distributed. The lamellar phyllosilicated mineral particles are particles also called synthetic phyllosilicated nanoparticles (6) that are mineral, silico/germano-metal, lamellar, synthetic and hydrophilic, and have an average size of between 10 nm and 1 μm. A substrate that includes a lubricating coating consisting of such a material, and an electrolytic deposition preparation method are also described.
摘要:
A method for manufacturing continuous, closed and hollow bodies which comprises (a) using cores (25) which are soluble in a solvent, (b) depositing on each core a coating (3) with a suitable mechanical strength to be self-supporting and having open pores to pass a solvent, and (c) placing the cores so coated into a solvent for dissolving the cores; the method of the invention may be implemented in bulk parts, in an economical manner, and allows making hollow bodies, in particular hollow balls, each comprising a continuous skin devoid of any macroscopic perforation and of a kind and with a thickness which are easily adjusted in relation to the desired properties.