40results about How to "Uniform temperature gradient" patented technology

A structure for extreme thermal cycling has a support element that supports a vessel primarily by bearing and frictional forces rather than by welds. The support element has a bearing portion that tapers inwardly beneath a knuckle that separates a cylindrical section of the vessel from a sloped lower section. The bearing portion of the support element follows that slope, providing an extended area of contact between the support element and the vessel. An annular section of the support element can be heated and expanded before placing it around the cylindrical section of the vessel to provide pre-stressing. If required, a strap may extend downwardly from the vessel over an upper edge of the support element.

An electrostatic chucking apparatus and a method for manufacturing the same is disclosed, which is capable of enabling the increase of lifetime of an electrostatic chuck and realizing a uniform temperature gradient in an entire substrate by preventing an insulating material from being etched, the electrostatic chucking apparatus comprising a base member; and an electrostatic chuck, loaded onto the base member, for chucking a substrate by an electrostatic force, wherein the electrostatic chuck comprises an insulating member formed on the base member and provided with a plurality of first insulating sheets of aluminum nitride; a heater for heating the substrate, the heater positioned among the plurality of first insulating sheets; a direct current electrode formed on at least one first insulating sheet provided above the heater among the plurality of first insulating sheets, the DC electrode electrically connected with a direct current power source; and an insulator etch stopping layer, formed of aluminum oxide on an entire surface of the insulating member, for preventing the insulating member from being etched.

The invention discloses a gradient induction heating device for high-strength steel. The gradient induction heating device for high-strength steel comprises a heating chamber, a conveyor belt, an induction heating coil, a frequency conversion device and a control device, wherein the heating chamber is provided with a feed inlet for conveying parts; the conveyor belt penetrates through the heating chamber via the feed inlet to reach the outside, and used for conveying the parts to be heated in the heating chamber; the induction heating coil is of a taper structure with the inner diameter gradually increasing; the conveyor belt can pass through in the center axis direction of the induction heating coil; the frequency conversion device is electrically connected with the induction heating coil and used for changing the power-on frequency of the induction heating coil; and the control device is electrically connected with the conveyor belt and used for controlling the stop locations of the parts. The gradient induction heating device for high-strength steel has the characteristics that errors are small, temperature can be controlled, and the heating temperature gradient is uniform.

The invention discloses a double-heater structure of a big-size sapphire furnace. The double-heater structure comprises a side heater and a bottom heater, wherein the side heater takes two copper rings which are axially connected through an insulating part as electrodes including a first copper electrode and a second copper electrode, a plurality of U-shaped tungsten sticks are peripherally mounted on the two copper electrodes respectively to form a tubular structure to serve as a heating element, and the U-shaped tungsten sticks are fixed on the first copper electrode and the second copper electrode respectively as per an axial symmetrical arrangement mode; the bottom heater adopts double helix tungsten filaments to build concentric heating rings as per thermal field requirements, the double helix tungsten filaments are connected to a battery lead plate through double helix connecting screws, and the bottoms of the double helix tungsten filaments are supported by U-shaped supporting tungsten sticks. The double-heater structure of the big-size sapphire furnace provided by the invention can create favorable thermal field conditions for growth of big-size sapphire crystal, and the production cost of the sapphire furnace is effectively reduced at the same time.

The application discloses a uniform cooling system and method for large-scale cylinder section differential temperature rolling, and relates to the technical field of steel rolling metallurgy technology. The cooling system includes a cooling unit, a temperature detection unit, a data processing unit and a control unit. The cooling unit includes a plurality of inner cooling devices and a plurality of outer cooling devices; the inner cooling device is used for jet cooling the inner wall surface of the barrel section; the outer cooling device is used for jet cooling the outer wall surface of the barrel section, and the plurality of outer cooling devices are used for jet cooling. The device is in one-to-one correspondence with a plurality of internal cooling devices; the temperature detection unit includes a first temperature acquisition device for real-time acquisition of the temperature values ​​of the inner and outer walls of the drum section located on the front side of the roll; the data processing unit can receive the temperature value, and then according to the temperature value , establish a temperature model, and generate a dynamic valve model; the control unit can adjust the flow rate of the inner cooling device or the outer cooling device according to the dynamic valve model. At the same time, the present application provides a method for uniform cooling in differential temperature rolling of large-scale barrel sections.

PURPOSE: Provided are a container for a fuel cell which can accommodate an electrolyte member, is compact and strong, and can allow gas to be distributed uniformly and temperature to be gradient uniformly, a fuel cell containing the container for portable electronic device, and an electronic tool containing the fuel cell. CONSTITUTION: The container comprises a base body which comprises a ceramic a concave part accommodating an electrolyte member having first and second electrodes at one and the other main faces, at the one side; a first fluid channel which is formed from the bottom face of the concave part facing the one main face of the electrolyte member to the outer face of the base body; a first wire conductor whose one end is located at the bottom face of the concave part facing the first electrode of the electrolyte member and whose the other end is drawn to the outside of the base body; a cover body which is installed by covering the one side of the environment of the concave part of the base body with the concave part and seals tightly the concave part; a second fluid channel which is formed from the one side of the cover body facing the other main face of the electrolyte member to the outer face of the cover body; a second wire conductor whose one end is located at the one face of the cover body facing the second electrode of the electrolyte member and whose the other end is drawn to the outside of the cover body; and a porous body which is located at the base body or the cover body so as to cover one of the first and second fluid channels where an oxidizing gas is supplied.

The invention belongs to the technical field of nonlinear optics, and in particular relates to a crystal furnace device for compensating Gouy phase shift to increase nonlinear interaction. The purpose of the present invention is to overcome the problem that the Gouy phase shift cannot be compensated by the Gaussian beam passing through the nonlinear crystal in the existing nonlinear optics experiments. Indium foil, upper Peltier element, second indium sheet, upper wedge-shaped metal furnace, third indium foil, nonlinear crystal, lower wedge-shaped metal furnace, fourth indium foil, lower Peltier element and fifth indium For the thin sheet, the inclined surfaces on the upper wedge-shaped metal furnace body and the lower wedge-shaped metal furnace body of the present invention are inclined backward and backward respectively, so that the nonlinear crystal is separated from the surface of the upper Peltier element and the lower Peltier element along the axial direction. The distance between them increases sequentially, so that the nonlinear crystal forms a temperature gradient along the axial direction.

The invention discloses a centrifugal sintering method for a functionally graded material of a thin-wall pipe fitting. The centrifugal sintering method for the functionally graded material of the thin-wall pipe fitting comprises the following steps of mixing two evenly distributed powder, a solvent and a dispersing agent, stirring in air, and vacuum degassing to form an even slurry; loading the slurry into a pulp spraying machine, then stretching a spraying head into a base plate in a centrifugal machine, and evenly spraying the slurry onto the inner wall of the base plate; changing the relative volume percentage of the two powder, and forming a second layer of composite material layer; repeating the steps, and forming multilayer spraying; stretching a graphite radiation heating element into an inner cavity of the base plate, electrifying, moving up and down, installing a layer of heat insulation layer on the outer wall of the base plate, and electrifying the heat insulation layer; andturning off the centrifugal machine, sintering a green body, taking the green body out from the base plate, and obtaining a hollow pipe fitting. According to the centrifugal sintering method for thefunctionally graded material of the thin-wall pipe fitting provided by the invention, through adding the graphite radiation heating element, and installing the heat insulation layer on the outer layerof the base plate, the even temperature gradient is realized internally, so that an effective guarantee is provided for preparing the uniform and compact thin-wall pipe fitting.

The invention discloses a combined substrate base for a microwave plasma chemical vapor deposition device. The combined substrate base comprises a tray main body, an outer edge part and an embedded part, wherein the tray main body is of a disc structure; an external thread is arranged on the outer side edge of the disc; a groove is formed in the center of the disc; the outer edge part is of a circular ring structure; an internal thread matched with the external thread is arranged on the inner side edge of the circular ring; an outer ring part is screwed on the tray main body through a matched thread structure; the height position of the outer ring part relative to the tray main body can be changed through controlling the screwing turn number; the embedded part is embedded in the groove; and a pit used for placing a sample is formed in the middle of the embedded part. The combined substrate base adopts a three-section split structure, the structure of a tray can be slightly adjusted, the influence degree of the tray structure on experiments is finely studied, and accuracy and reliability of the experiments are improved.

The invention relates to the field of trolley frog welding technology, in particular to a welding process of alloy steel and grooved steel rail. The welding process of alloy steel and channel rail provided by the present invention is to weld alloy steel and channel rail together by flash welding method, including flash flat stage, preheating stage, burning stage, upsetting stage and post-heating stage. The total duration of the welding process is 114s-115s, the upsetting amount of the welding process is 12mm-12.8mm, and the total rail consumption of the welding process is 30-31.8mm. The welding process of the alloy steel and the grooved rail provided by the invention successfully realizes the flash welding of the alloy steel and the grooved rail, and the formed welded joint has good mechanical properties and stable welding quality.

This fuel cell container is equipped with a substrate 6 having a recessed part to house the electrolyte member 3 having first and second electrodes 4, 5, a first fluid passage 8 formed from the bottom surface of the recessed part on to the external surface of the substrate 6, a first wiring conductor 10 one end of which is disposed on the bottom surface of the recessed part and the other end of which is led out to the external surface of the substrate 6, a lid body 7 attached to the upper surface of the periphery of the recessed part of the substrate 6, a second fluid passage 9 formed from the lower surface of the lid body 7 on to its external surface, and a second wiring conductor 11 one end of which is disposed on the lower surface of the lid part 7 and the other end of which is led out to the external surface of the lid part 7, and a recessed part 12 is formed in either one of the contact part where the first electrode 4 is brought into contact with the substrate 6 or the contact part where the second electrode 5 is brought into contact with the lid part 7.