摘要:
A process for preparing a composition including synthetic mineral particles, in which a hydrogel which is a precursor of the synthetic mineral particles is prepared via a coprecipitation reaction between at least one compound including silicon, and at least one compound including at least one metal element, characterized in that the coprecipitation reaction takes place in the presence of at least one carboxylate salt of formula R2—COOM′ in which: —M′ denotes a metal chosen from the group made up of Na and K, and —R2 is chosen from H and alkyl groups including fewer than 5 carbon atoms. A composition including synthetic mineral particles which is obtained by such a process is also described.
摘要:
A method for preparing a composition including synthetic mineral particles, in which: a hydrogel that is a precursor of the synthetic mineral particles is prepared, and the hydrogel is subjected to a hydrothermal treatment, characterized in that at least one step of the hydrothermal treatment is carried out with the addition of at least one carboxylate salt to the treatment medium, the carboxylate salt having the formula R—COOM′, where M′ denotes a metal selected from the group consisting of Na and K, and R is selected from H and the alkyl groups that include fewer than 10 carbon atoms.
摘要:
A method for preparing a novel hydrogel including silico-metallic mineral particles of the formula (Six(Si-A)1-x)4M3O11.n′H2O, in which: x is a real number in the range [0.75; 1], A denotes a group selected from methyl and hydrocarbon groups including at least one heteroatom, and M is a metal selected from the group consisting of magnesium, cobalt, zinc, copper, manganese, iron, nickel and chromium, wherein a coprecipitation reaction is carried out in an aqueous medium between: at least one metal salt of the metal M, sodium metasilicate, Na2OSiO2, and at least one water-soluble oxysilane of formula (I): in which R1, R2 and R3 are selected from hydrogen and linear alkyl groups including 1 to 3 carbon atoms.
摘要:
A method for preparing a novel hydrogel including silico-metallic mineral particles of the formula (Six(Si-A)1−x)4M3O11.n′H2O, in which: x is a real number in the range [0.75; 1], A denotes a group selected from methyl and hydrocarbon groups including at least one heteroatom, and M is a metal selected from the group consisting of magnesium, cobalt, zinc, copper, manganese, iron, nickel and chromium, wherein a coprecipitation reaction is carried out in an aqueous medium between: at least one metal salt of the metal M, sodium metasilicate, Na2OSiO2, and at least one water-soluble oxysilane of formula (I): in which R1, R2 and R3 are selected from hydrogen and linear alkyl groups including 1 to 3 carbon atoms.
摘要:
A process for preparing a composition including synthetic mineral particles, in which a hydrogel which is a precursor of the synthetic mineral particles is prepared via a coprecipitation reaction between at least one compound including silicon, and at least one compound including at least one metal element, characterized in that the coprecipitation reaction takes place in the presence of at least one carboxylate salt of formula R2—COOM′ in which: —M′ denotes a metal chosen from the group made up of Na and K, and —R2 is chosen from H and alkyl groups including fewer than 5 carbon atoms. A composition including synthetic mineral particles which is obtained by such a process is also described.
摘要:
A method for preparing a composition including synthetic mineral particles, in which: a hydrogel that is a precursor of the synthetic mineral particles is prepared, and the hydrogel is subjected to a hydrothermal treatment, characterized in that at least one step of the hydrothermal treatment is carried out with the addition of at least one carboxylate salt to the treatment medium, the carboxylate salt having the formula R—COOM′, where M′ denotes a metal selected from the group consisting of Na and K, and R is selected from H and the alkyl groups that include fewer than 10 carbon atoms.
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 pill, or like object, splitting apparatus includes a base having a bottom and continuous side walls defining an interior area. The side wall defines primary apertures. A cutting platform is situated in the interior area in a first horizontal plane defined by apertures, the cutting platform defining a bore extending horizontally between the primary apertures. Primary clamp members extends through respective primary apertures into the bore of the cutting platform. The clamp members engage with the pill to position and hold the pill/tablet stable during the cutting process. A plunger assembly having a compression plate and a blade is operatively coupled to the compression plate, the plunger selectively positioned in communication with the interior area via the open top of the base such that the blade severs the pill upon a downward pressure on the compression plate. The cutting portion is interchangeable with different configurations of blade/blades.
摘要:
Video decoder apparatus and method, for decoding a motion-compensated transform-coded video stream. The apparatus has: a first mode in which it is operable to decode the video stream at a first resolution, and wherein a motion-compensation step of the decoding is performed in the image-domain. It also has a second mode in which it is operable to decode the video stream at a second resolution, and wherein at least one motion-compensation step is performed in the transform-domain. The decoder is adapted to switch between the two modes while decoding the video stream.
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。