Abstract:
The invention is concerned with a method of forming a single crystal of a ceramic, semiconductive or magnetic material. The method according to the invention comprises the steps of (a) compacting a nanocrystalline powder comprising particles having an average particle size of 0.05 to 20 μm and each formed of an agglomerate of grains with each grain comprising a nanocrystal of a ceramic, semiconductive or magnetic material; and (b) sintering the compacted powder obtained in step (a) at a temperature sufficient to cause an exaggerated growth of at least one of the grains, thereby obtaining at least one single crystal of aforesaid material. Instead of sintering the compacted powder, it is also possible to contact same with a template crystal of the aforesaid material, and to heat the compacted powder and template crystal in contact with one another so as to cause a sustained directional growth of the template crystal into the compacted powder, thereby obtaining a single crystal having a size larger than the template crystal. By using nanocrystalline powders, the temperature of operation for crystal growth is reduced, the rate of crystal growth increases, and crystals with large size and with very little or no porosity or inclusions can be obtained.
Abstract:
A Temperature Swing Adsorption method for separating a first component, comprising a more adsorbable component, from a feed stream comprising more than 50 mol% of a second component, comprising a less adsorbable component, is provided. The method includes providing an adsorbent structure suitable for adsorbing the first component, the structure being of the parallel passage contactor type, and cyclically implementing the following steps. Passing the feed stream through the adsorbent structure thus adsorbing the first component and producing a stream depleted in the first component and enriched in the second component. Heating the adsorbent structure to desorb the adsorbed first component by means of circulating a heating stream enriched in the first component at a temperature suitable for regeneration. And cooling the structure by means of passing through it more than 50% of the stream enriched in the second component produced in the step a).
Abstract:
The invention relates to an additional rear stoplight (10) to be installed at the back of a passenger compartment (25) in a vehicle, wherein the rear stoplight (10) includes attachment means (14) and a base (12) for receiving lighting means, the attachment means (14) being intended for connecting the base (12) to a wall of the roof (28), and the attachment means (14) including at least one mechanical member (18) extending through the wall of the roof (28). According to the invention, the mechanical member (18) includes at least two tabs (20) extending substantially opposite each other, wherein said tabs are to be moved apart from each other so as to be inserted through the wall of the roof (28), the tabs (20) and the base (12) being moulded together as a single part.
Abstract:
A compressed gas delivery vehicle has a cooling system that cools an interior of a gas storage vessel during filling of the vessel with the gas wherein the gas is sorbed by a sorbent material comprising an adsorbent or an absorbent. A vehicle (1) has an onboard compressed gas container (3) and an onboard cooling system (17). During a filling operation, gas from compressed gas container (3) flows through compressed gas container outlet conduit (4), compressed gas outlet valve (9a) and into compressed gas outlet conduit (9b). A compressed gas fitting (9c) connects conduit (9b) and a gas storage vessel inlet valve (9e). In order to achieve a relatively fast fill rate, a cooling system (17) is employed with the gas storage vessel (13). A chilled coolant is pumped out of the cooling system (17) into cooling system outlet conduit (5b). A chilled coolant fitting (5c) connects cooling system outlet conduit (5b) and gas storage vessel coolant inlet valve (5e). The chilled coolant flows past valve (5e) and into gas storage vessel heat exchange conduit (11).
Abstract:
A structured adsorbent sheet, is provided including a nano-adsorbent powder, and a binder material, wherein the nano-adsorbent powder is combined with the binder material to form an adsorbent material, and a porous electrical heating substrate, wherein the adsorbent material is applied to the porous electrical heating substrate thereby forming a structured adsorbent sheet. A structured adsorbent module is provided, including a plurality of stacked structured adsorbent sheets, configured to produce a plurality of fluid passages, wherein the plurality of fluid passages have a cross-sectional shape in the direction of a fluid stream. The structured adsorbent module may have a cross-sectional shape that is trapezoidal, rectangle, square, triangular or sinusoidal. A structured adsorbent bed is provided, including a plurality of modules, stacking the modules, thereby providing a plurality of process fluid passages, and a process fluid inlet and a process fluid outlet, in fluid communication with the plurality of process fluid.
Abstract:
The invention relates to a method of producing an optical glass precursor in powder form containing nanocrystals. The method of the invention comprises subjecting a glass material and an optically active crystalline material to high-energy ball milling to obtain a composite material in powder form comprising particles each containing nanocrystals of the optically active crystalline material uniformly dispersed in a matrix of the glass material, the composite material defining the aforesaid optical glass precursor. Such a method enables the composition of the nanocrystals to be varied independently of the composition of the glass matrix.
Abstract:
The invention relates to a ceramic material in powder form comprising particles having an average particle size of 0.1 to 30 μm and each formed of an agglomerate of grains with each grain comprising a nanocrystal of a ceramic material of formula (I): Si 3-x Al x O y N z , wherein 0 ≤ x ≤ 3, 0 ≤ y ≤ 6 and 0 ≤ z ≤ 4, with the proviso that when x is 0 or 3, y cannot be 0. The ceramic material in powder form according to the invention is suitable for use in the production of ceramic bodies by powder metallurgy, as well as in the formation of heat-resistant coatings by thermal deposition. The ceramic bodies and coatings obtained have improved resistance to thermal shocks.
Abstract:
The invention relates to a ceramic material in powder form comprising particles having an average particle size of 0.1 to 30 mu m and each formed of an agglomerate of grains with each grain comprising a nanocrystal of a ceramic material of formula (I): Si>3-x x y z
Abstract translation:本发明涉及一种粉末形式的陶瓷材料,其包含平均粒径为0.1至30μm的颗粒,并且每个由颗粒附聚物形成,每个颗粒包含式(I)的陶瓷材料的纳米晶体:Si> 3 -x x O y N z,其中0≤x≤3,0≤y≤6且0≤z≤4,条件是 当x为0或3时,y不能为0.根据本发明的粉末形式的陶瓷材料适用于通过粉末冶金制造陶瓷体,以及通过热形成耐热涂层 沉积。 获得的陶瓷体和涂层具有改善的耐热冲击性。