36 results about "All ceramic" patented technology

This utility model discloses a composite liner for a bauxite ball mill, relating to the field of ball mill technology. It includes an outer connecting ring, with a mounting plate connected to the inner wall of the outer connecting ring. A buffer mechanism is provided between the outer connecting ring and the mounting plate. A modular system is provided on the side of the mounting plate away from the outer connecting ring. The modular system includes multiple ceramic liner plates that adhere to the surface of the mounting plate away from the outer connecting ring. All ceramic liner plates have an arc-shaped structure, and staggered protrusions are provided at both ends of each ceramic liner plate. A fastening mechanism is provided inside the outer connecting ring, the mounting plate, and the ceramic liner plates, and an expansion component is provided at the connection between the fastening mechanism and the ceramic liner plates. This utility model, through a series of structures, forms a multi-layered composite structure, which enhances the overall wear resistance, buffering, and noise reduction performance, facilitates individual replacement of worn areas, and prevents the overall installation from loosening.

The invention provides a porous titanium black ceramic body, a preparation method and application thereof and an electro-catalysis device. The preparation method comprises the following steps: carrying out sintering molding on a mixture of TiOx powder and a metal oxide type ionic crystal or firstly molding and then sintering to prepare a ceramic body containing the TiOx powder and the metal oxide type ionic crystal; carrying out acid pickling on the ceramic body to obtain a porous TiOx ceramic body; in the TiOx powder, x is more than 0 and less than or equal to 1; or carrying out sintering molding on the mixture of the TiO2 powder and the metal Mg, or firstly molding and then sintering to prepare a ceramic body containing the TiOx powder and the magnesium oxide; carrying out acid pickling on the ceramic body to obtain a porous TiOx ceramic body; in the TiOx powder, xlt is greater than or equal to 1; 2. The porous titanium black ceramic body has conductivity close to metal grade, a through porous structure and full-ceramic chemical stability, the preparation method is simple, the cost is low, and industrial production is facilitated.

The invention relates to the technical field of inorganic non-metallic materials, provides a full-ceramic integrated vacuum cup and a laser microstructure heat resistance method thereof, and solves the problem that integrated full-ceramic vacuum sealing and efficient heat preservation cannot be realized due to limitation of materials, structures and processes of existing inorganic non-metallic materials. The cup comprises a cup body and a sealing cover arranged at the top of the cup body, the cup body comprises an annular opening part and an interlayer cup body which are sequentially arranged from top to bottom, the interlayer cup body comprises an inner layer and an outer layer which are arranged at an interval, and a heat insulation cavity is formed between the inner layer and the outer layer; a process hole is formed in the bottom of the interlayer cup body and is communicated with the heat insulation cavity; a heat-resistant layer is arranged on the outer surface of the interlayer cup body, and the heat-resistant layer has the surface appearance from the micron level to the submicron level; the laser microstructure heat-resistant layer with specific roughness is arranged on the outer surface of the interlayer cup body, so that heat loss caused by high heat conductivity of a ceramic material is reduced.

The utility model discloses a novel modularized hard ceramic fiber plate furnace lining, relates to the technical field of industrial furnaces, and aims to solve the problems that in the prior art, when a full-ceramic fiber furnace lining falls off, a large-area full-fiber module needs to be disassembled, damaged parts are replaced, and the working efficiency is reduced. A movable top cover is arranged at the top of the box-type furnace external steel structure, bolts are arranged in the box-type furnace external steel structure and the movable top cover, ceramic fiber blankets cover the inner surfaces of the box-type furnace external steel structure and the movable top cover, furnace lining modules are arranged on the other faces of the ceramic fiber blankets, the furnace lining modules are hard ceramic fiber blocks, and stainless steel plates are arranged in the furnace lining modules. When a damaged furnace lining module is replaced, only the damaged furnace lining module and one adjacent furnace lining module need to be dismantled together, the damaged furnace lining module and the adjacent furnace lining module can be dismantled and replaced, and the maintenance efficiency is greatly improved.

This invention discloses a dual-function cage structure for ultra-high temperature, high-speed all-ceramic ball bearings, belonging to the field of all-ceramic bearing technology. The cage is made of silicon nitride, silicon carbide, or zirconium oxide and includes a guiding structure and a lubrication and protection structure. The guiding structure is an arc-shaped fitting pocket for high-precision guidance. The lubrication and protection structure consists of an annular lubrication storage cavity, a gradient aperture slow-release channel, and a capillary transport structure connected in sequence to form a synergistic lubrication system, which can suppress high-temperature volatilization, overcome centrifugal oil spillage, provide quantitative slow release, and ensure precise oil supply. This invention achieves dual-function coupling of guidance and lubrication, reducing the friction coefficient by ≥35% and increasing service life by ≥60%. It is suitable for ultra-high temperature, high-speed, and extreme operating conditions in aerospace, high-end equipment, and other fields, and has high engineering application value.

The invention discloses an abradable / environmental barrier composite gradient coating with a self-healing function and a preparation method of the abradable / environmental barrier composite gradient coating, and belongs to the technical field of abradable coatings. The four-layer structural design of the Si bonding bottom layer, the Yb2Si2O7-S environmental barrier middle layer, the Yb2SiO5-S environmental barrier middle layer and the LaMgAl11O19-polybenzoate-A abradable surface layer is adopted, and corrosion protection compactness and abrasion protection porosity are both considered through gradient matching of thermal expansion coefficients of materials of all the layers. The coating adopts a full-ceramic coating design without a solid lubricant, a porous easy-to-wear structure is formed through a polybenzoate pore-forming phase, the strength of the coating is improved in cooperation with high-temperature oxidation repair of a self-healing phase, and durability and abradability are balanced. And a differentiated self-healing matching strategy is utilized to ensure that the materials have good chemical compatibility. The preparation process is simple and convenient, has the advantages of low cost and easiness in industrial production, and is suitable for large-scale batch production.

The magnetic driver comprises an outer bearing seat, a machine frame and a bearing seat which are fixedly connected, a transmission shaft penetrates through the bearing seat and the machine frame, a full-ceramic bearing is arranged at the upper end in the bearing seat, a radial magnetic suspension bearing is arranged at the lower end in the bearing seat, a magnetic transmission part is arranged at the upper end of the transmission shaft, and a magnetic bearing is arranged at the lower end of the transmission shaft. The upper end of the bearing seat is provided with an inflow port, the lower end of the bearing seat is provided with an outflow port, the upper end in the bearing seat is provided with a cleaning fluid distributor, the cleaning fluid distributor is communicated with the inflow port, and a runner is arranged in the rack; through the combination of the full-ceramic bearing and the radial magnetic suspension bearing which are arranged inside and the circular arc transition design of the internal flow channel, no dead angle of the flow channel is realized, so that the cleaning and sterilization of the driver are effectively realized, the driver can adapt to special industries needing highly clean and sterile environments, and the service life of the driver is prolonged. And the practicability of the device is improved.

The utility model discloses a full-ceramic shell of a temperature sensor, which comprises a support, a gasket and a temperature sensing cover body, and the support, the gasket and the temperature sensing cover body are all made of ceramic materials. According to the utility model, the support, the gasket and the temperature sensing cover body which are all made of ceramic materials are adopted, so that the insulating performance of the temperature sensor shell is remarkably improved, the influence of electromagnetic interference on temperature sensor elements is effectively avoided, and the measurement accuracy of the sensor is improved; meanwhile, due to the high temperature resistance of the ceramic material, the temperature sensor can work normally in a high-temperature environment, the application range of the temperature sensor is widened, reliable protection is provided for temperature sensor elements, and it is ensured that the temperature sensor can work accurately and stably. The ceramic material can be aluminum oxide ceramic, silicon nitride ceramic and the like, so that different requirements on high temperature resistance, corrosion resistance and insulation can be met.

1. Name of the designed product: all-ceramic metering pump. 2. Use of the designed product: liquid filling element, for filling of liquids. 3. Design points of the designed product: in shape. 4. Picture or photo best indicating the design points: perspective view 1.

The utility model relates to the technical field of resistors with ceramic shells, in particular to a processing and assembling device for resistors with ceramic shells. According to the technical scheme, the machining and splicing device for the resistor with the ceramic shell comprises a machining table and further comprises a rotary assembling assembly, an assembling assembly and a vibration feeding disc; a rotary assembling assembly is arranged at the upper end of the machining table. Assembling assemblies are arranged on the periphery of the rotary assembling assembly; a vibration feeding disc is arranged on the outer side of the assembling assembly. According to the utility model, the servo motor of the rotary assembling component drives the gear box to drive the turntable to rotate, and is matched with the dynamic adjustment of the clamping cylinder of the assembling component, so that the ceramic shell resistors on all resistor assembling clamps can be assembled independently in the assembling process, and the assembling efficiency is improved.

The utility model discloses a multifunctional automatic brick paving machine based on visual segmentation, and relates to the technical field of brick paving equipment, the multifunctional automatic brick paving machine comprises a brick paving machine main body, the brick paving machine main body is provided with a cement vibration module, a three-axis linkage cutting module, a ceramic tile feeding module, a four-axis linkage adsorption module, a cement paving module, a walking module and a control module; the cement vibration module comprises a cement barrel body and a cement barrel vibration device; the three-axis linkage cutting module comprises a three-axis mechanical arm and a cutting device, and the cutting device is installed on a mobile terminal of the three-axis mechanical arm; the ceramic tile feeding module can drive all ceramic tiles to move upwards. The four-axis linkage adsorption module comprises a four-axis mechanical arm, a tail platform is installed on a mobile terminal of the four-axis mechanical arm, and a visual module and a vacuum suction cup are installed on the tail platform; the cement tiling module is used for tiling cement in the cement barrel body on the ground; the walking module is used for driving the brick paving machine body to move. The ceramic tile cutting device can cut ceramic tiles and then install the ceramic tiles.

The invention provides special calcium carbonate powder for a thermoplastic elastomer and a preparation method of the special calcium carbonate powder, and belongs to the technical field of inorganic materials. The preparation method comprises the following steps: mixing small calcite particles with a dispersing agent and whitening slurry, and carrying out ball milling to obtain primary calcium carbonate; and performing surface modification on the primary calcium carbonate. High-purity small calcite raw ore is used as an initial raw material and is subjected to ball milling through a full-ceramic ball mill, and introduction of impurities such as iron caused by contact of calcium carbonate and ball milling equipment in the ball milling process is avoided; a dispersing agent and whitening slurry are added in the ball milling process, and the prepared calcium carbonate powder has the characteristics of high whiteness, low oil absorption value and high dispersity, is uniform in particle size distribution, has good compatibility with a thermoplastic elastomer (TPE), and is suitable for the field with strict requirements on whiteness and hue stability.

The application discloses a full-ceramic microcapsule packaged fuel assembly first-cycle 18-month pressurized water reactor core and a loading method thereof. The core is composed of 177 full-ceramic microcapsule packaged fuel assemblies. The assemblies are loaded according to the enrichment degree and are divided into three zones. The enrichment degree of the assemblies in the three zones is controlled within the range of 8% to 10%. Each of the assemblies is provided with 12 burnable poison rods. The assembly with the highest enrichment degree is arranged in the outer zone of the core, and there are 72 assemblies with the highest enrichment degree. The assembly with relatively low enrichment degree is arranged in the middle zone of the core, and there are 32 assemblies with relatively low enrichment degree. The assembly with the lowest enrichment degree is arranged in the inner zone of the core, and there are 73 assemblies with the lowest enrichment degree. The application can ensure that the pressurized water reactor core composed of 177 fuel assemblies can improve the core power by 40% compared with the rod-shaped fuel under the premise of not changing the size of the core shape, and the core power can reach 4400MW. The first-cycle service life length reaches 18 months, and the nuclear fuel utilization rate and the economy are obviously improved.

The utility model relates to a cooling fan capable of preventing a bearing from being corroded, which aims at solving the technical problem that the existing similar products lack the structural design that a stainless steel shaft core is adopted in a hub and the stainless steel shaft core at the bearing is combined with a ceramic coating. The radiating fan is characterized in that ceramic coatings are respectively arranged on the surfaces of at least two ends of a stainless steel shaft core in a hub of the radiating fan, an upper bearing and a lower bearing are respectively and fixedly arranged in a middle pipe of a frame body at the ceramic coatings, and the stainless steel shaft core is fixedly arranged in the middle pipe of the frame body through a clamping groove and a retaining ring at the tail end of one side of the lower bearing and a plastic gasket. A spring is arranged on the outer diameter of the stainless steel shaft core on the outer side of the upper bearing; two ends of the spring respectively abut against the upper bearing and the inner wall of the hub; a motor shell assembly is arranged in the hub, the magnet is arranged on the inner wall of a motor shell of the motor shell assembly, the stainless steel shaft core and a center shaft in the motor shell are riveted into a whole through a shaft sleeve, and one end of the spring abuts against the shaft sleeve. Therefore, a traditional metal shaft core or a full-ceramic shaft core is replaced by plating the ceramic coating on the surface of the stainless steel shaft core.

The invention discloses a mounting method of a detachable hidden ceramic rod, which specifically comprises the following steps: S1, pretreating the ceramic rod: respectively forming vertical grooves in the upper end and the lower end of the ceramic rod; s2, a second fixing piece is installed at the hole in the bottom of the steel frame, and the top of the steel frame penetrates into the first ceramic rod from the bottom of the first ceramic rod; s3, a first fixing piece is installed on the top of the first ceramic rod; s4, the top of the steel frame penetrates into the bottom of the second ceramic rod, and a first fixing piece is installed on the top of the second ceramic rod; s5, all the ceramic rods are installed on the steel frame, when the last ceramic rod on the top of the steel frame is installed, a second fixing piece is installed on the top of the ceramic rod, and installation of all the ceramic rods on the steel frame is completed; and S6, the top and the bottom of the steel frame are connected with the top and the bottom of the steel frame transfer layer through corner connectors correspondingly, and overall installation of the ceramic rod is completed. Through pretreatment of the ceramic rod and arrangement of the first fixing piece and the second fixing piece, hidden installation of the steel frame is achieved, and the installation stability and the installation flexibility of the sleeve are improved.

The invention relates to the technical field of nuclear reactor fuels, and provides a full-ceramic micro-packaged fuel and a preparation method thereof.The method comprises the steps that TRISO particles are added into viscous slurry prepared by mixing polycarbosilane, xylene, high-purity nanometer beta-SiC powder and beta-SiC crystals, and fuel slurry is obtained; fuel slurry is added into the SiC cylindrical mold until the top surface of the SiC cylindrical mold is flush, the SiC cylindrical mold is placed in a vacuum-pumping environment after standing, argon shielding gas is introduced for segmented cracking reaction, and a semi-dense fuel pellet is prepared; the semi-dense fuel pellet is placed in a vacuumizing environment, the atmosphere of a SiC source is introduced, chemical vapor infiltration treatment is conducted on the semi-dense fuel pellet, and a dense FCM fuel pellet blank is prepared; and the prepared densified FCM fuel pellet blank is subjected to grinding machining treatment, and an FCM fuel pellet finished product is obtained. According to the invention, non-sintering low-temperature preparation of the FCM fuel pellet is realized, and the spatial distribution of TRISO particles is adjustable.

The utility model relates to the technical field of filtering equipment, in particular to a sealing component mounting structure of a ceramic membrane, which comprises a mounting plate arranged on the inner wall of a filter cylinder, and the mounting plate is provided with a plurality of mounting holes for mounting ceramic membrane tubes; the fastening assembly is used for locking the movable pressing plate on the mounting plate. According to the utility model, the pressing sleeves are detachably arranged on the movable pressing plate, so that the movable pressing plate can drive all the pressing sleeves to extrude the first sealing ring, and when the ceramic membrane tubes on the mounting plate need to be disassembled independently, the corresponding ceramic membrane tubes can be taken out from the movable pressing plate only by disassembling the pressing sleeves of the ceramic membrane tubes from the movable pressing plate; when all the ceramic membrane tubes on the mounting plate need to be dismounted, all the ceramic membrane tubes can be taken down from the mounting plate only by dismounting the fastening assembly and separating the movable pressing plate from the mounting plate, so that the ceramic membrane tubes can be flexibly mounted and dismounted.

The utility model relates to an integrated full-lining full-surrounding ceramic ball valve which comprises a valve body, a valve ball, a valve seat, a valve rod and a support, the support is arranged at the top of the valve body, the valve body is integrated and comprises a flange, a support platform and a stuffing box which are welded, the valve ball is arranged in the center of the valve body and attached to the cambered surface of the valve seat in the valve body, and meanwhile the valve ball and the valve rod are both perpendicularly arranged. Small steps at the two ends of the valve seat extend to the two sides of the valve body and are flush with flange sealing faces on the two sides of the valve body, a valve body channel is made of full-ceramic materials, one end of the valve rod penetrates through a valve rod hole to extend into the valve ball, and the other end of the valve rod is higher than the support and connected with a driving device. The stuffing and the stuffing pressing sleeve are sequentially arranged in the stuffing box from bottom to top, the pressing plate is arranged at the top of the stuffing box, and the pressing plate adjusts extrusion through the pressing plate bolt and the pressing plate nut. The ceramic check valve is simple in structure and convenient to assemble and maintain, meanwhile, the whole valve body channel is made of full-ceramic materials, corrosion resistance is achieved, and the service life is prolonged.

The invention discloses a high-temperature-resistant integrated ring-focus antenna with a ceramic dielectric metallized structure, which comprises double reflecting surfaces of the ceramic dielectric metallized structure, and the double reflecting surfaces comprise a main reflecting surface supporting structure and an auxiliary reflecting surface supporting structure which are made of ceramic materials. Metal layers are plated on the inner surfaces of the main reflecting surface supporting structure and the auxiliary reflecting surface supporting structure, a feed source is arranged at the bottom of the main reflecting surface supporting structure, a radome is arranged at the top of the auxiliary reflecting surface supporting structure, and the radome is integrated with the auxiliary reflecting surface supporting structure and the metal layer on the surface of the auxiliary reflecting surface supporting structure. A heat shield can be arranged between the main reflecting surface supporting structure and the auxiliary reflecting surface supporting structure. The VSWR (Voltage Standing Wave Ratio) of the ring focus antenna is less than or equal to 1.75 in a frequency band from 34.4 GHz to 35.4 GHz, and the gain range of 32.7 to 34.3 dBi can be realized. Within 1500s when the antenna window is continuously loaded with the high temperature of 1200 DEG C, the temperature of the feed source port is 27 DEG C and 34 DEG C respectively when the heat shield exists or not.

The invention relates to a preparation method of a locally thinned ceramic shell for precision casting, and relates to the field of precision casting, and the preparation method comprises the following steps: after the nth layer of ceramic shell is formed by shell making, a target thinned area is coated with a paraffin-based aqueous emulsion, and then drying is performed to obtain a middle ceramic shell, n is greater than or equal to 3; the middle ceramic shell is subjected to shell making to complete preparation of all ceramic shell layers, then pyrolysis roasting is conducted, and a locally-thinned ceramic shell is obtained; the paraffin-based water-based emulsion comprises the following components in percentage by mass: 20-40% of paraffin, 3-10% of a nonionic emulsifier, 0.5-3% of a surface active aid, 0.1-1% of a stabilizer, less than or equal to 1% of a functional aid and the balance of water. According to the preparation method provided by the invention, the specifically designed paraffin-based water-based emulsion is coated behind the n layers of ceramic shells, so that the slurry at the thinned position can be effectively prevented from being attached to the area, the accurate control on the thickness of the mold shell is realized, the accurate control on the thickness of the thinned position is ensured, and the high-precision preparation of a precision casting product is realized.

The present invention discloses a high-performance, integrated all-ceramic-based metamaterial perfect absorber. The ceramic-based metamaterial absorber has a simple and compact structure and is highly compatible with different dielectric ceramic systems to obtain perfect absorption characteristics at different frequencies. It does not require a substrate and can be integrated and matched with a variety of microwave / millimeter wave devices and systems, breaking the theoretical framework of traditional construction of perfect absorption devices. The absorber includes a ceramic resonant unit array, and the ceramic resonant unit array includes a number of ceramic resonant units distributed in a matrix. The ceramic resonant unit is composed of a temperature-stable dielectric ceramic with an orthogonal cubic structure. According to the equivalent circuit model, the expression of its equivalent resistance R is: #imgabs0# where Q is the inverse of the loss tangent value of the ceramic at the perfect absorption frequency; L is the length of the long side of the ceramic resonant unit; S is the cross-sectional area of ​​the ceramic resonant unit, S=h×r; ω is the perfect absorption frequency; ε0 is the vacuum dielectric constant; ε r is the relative dielectric constant of the ceramic.

The invention belongs to the technical field of semiconductor manufacturing equipment, and particularly relates to a full-ceramic aluminum nitride electrostatic chuck and a preparation method thereof. According to the invention, the aluminum nitride / metal ceramic composite material is adopted as the heating element and is combined with the aluminum nitride matrix to replace the traditional metal heating element; by accurately controlling oscillation pressure and temperature curves, rearrangement and densification of ceramic particles are promoted, co-sintering of a matrix and a heating element is achieved, and a high-density and high-strength interface is obtained. And finally, the high-performance full-ceramic aluminum nitride electrostatic chuck with long service life is obtained. According to the invention, the long-standing problem of a metal-ceramic interface is solved, and a key component with higher reliability, long service life and excellent temperature control performance is provided for semiconductor preparation.

The present invention discloses an I-type self-preheating burner with a special-shaped tubular ceramic stud double-stroke heat exchanger, comprising a burner core, a special-shaped tubular box heat exchanger, an inner conduit, and a fully ceramic optimized stud heat exchanger. The upper end of the fully ceramic optimized stud heat exchanger is sleeved within the special-shaped tubular box heat exchanger, the lower end of the fully ceramic optimized stud heat exchanger extends outside the special-shaped tubular box heat exchanger, the upper end of the inner conduit is connected to the upper end of the special-shaped tubular box heat exchanger, the lower end of the inner conduit extends into the inner cavity of the fully ceramic optimized stud heat exchanger, the burner core is sleeved within the inner conduit, and the upper and lower ends of the burner core extend from the upper and lower ends of the inner conduit, respectively. The present invention can form a stable and uniform flame under high blast furnace temperatures, produce ultra-low NOx smoke exhaust, improve heat exchange efficiency, and play a role in reducing emissions and energy consumption. The burner adopts a modular design, and the system is very easy to maintain and modify.

The application discloses a kind of burn-resistant flexible mineral fireproof cable and preparation method thereof.The cable includes metal pipe sheath cable core;Metal pipe sheath cable core outside has two mineral fire-retardant mud layers from inside to outside, namely first mineral fire-retardant mud layer and second mineral fire-retardant mud layer;The first mineral fire-retardant mud layer is the mud mixture of ceramic reaction powder raw material plus water;Second mineral fire-retardant mud layer is glass batch raw material;The ceramic phase generation temperature of the ceramic reaction powder raw material of the first mineral fire-retardant mud layer is higher than the glass transition temperature of the glass reaction powder raw material of the second mineral fire-retardant mud layer.The first mineral mud layer of the present application under sustained high temperature, under the protection of the second mineral mud layer in viscoelastic state, complete ceramic reaction occurs, forms the dense structure of ceramic layer, improves cable body hardness and fireproof performance, maintains the structural stability of flexible mineral fireproof cable, avoids cable failure.

The application discloses a full-ceramic microcapsule packaged fuel assembly first-cycle 24-month pressurized water reactor core and a loading method thereof. The core is composed of 177 full-ceramic microcapsule packaged fuel assemblies. The assemblies are loaded according to the enrichment degree and are divided into three zones. The enrichment degrees of the assemblies in the three zones are controlled within the range of 8% to 10%. The assemblies with the highest enrichment degree are arranged in the outer zone of the core. The assemblies with the highest enrichment degree are 72 assemblies. The burnable poison rods in part of the assemblies are 8, and the burnable poison rods in another part of the assemblies are 12. The assemblies with relatively low enrichment degree are arranged in the middle zone of the core. The assemblies with relatively low enrichment degree are 32 assemblies, and the burnable poison rods in the assemblies are 12. The assemblies with the lowest enrichment degree are arranged in the inner zone of the core. The assemblies with the lowest enrichment degree are 73 assemblies, and the burnable poison rods in the assemblies are 12. The power of the core is increased by 15% compared with the power of the rod-shaped fuel, and can reach 3500MW. The first-cycle service life length reaches 24 months. The safety and economy of the core are obviously improved.

The invention discloses a firing-resistant flexible mineral fireproof cable and a preparation method thereof. The cable comprises a metal tube sheath cable core. Two mineral flame-retardant powder mud layers, namely a first mineral flame-retardant powder mud layer and a second mineral flame-retardant powder mud layer, are arranged on the outer side of the metal tube sheath cable core from inside to outside; the first mineral flame-retardant powder mud layer is a muddy mixture prepared by adding water into a ceramic reaction powder raw material; the second mineral flame-retardant powder mud layer is a glass batch raw material; the ceramic phase generation temperature of the ceramic reaction powder raw material of the first mineral flame-retardant powder mud layer is higher than the glass transition temperature of the vitrification reaction powder raw material of the second mineral flame-retardant powder mud layer. According to the invention, under continuous high temperature, the first mineral powder mud layer is protected by the second mineral powder mud layer in the viscoelastic state, a complete ceramic reaction is carried out, a ceramic layer with a compact structure is formed, the hardness and fireproof performance of the cable body are improved, the structural stability of the flexible mineral fireproof cable is maintained, and the cable failure is avoided.

A method for preparing a full ceramic dental restoration having an integral core and shell structure, in which a digital build model of the dental restoration is built and then the obtained CAD dataset is divided into at least two different CAD partial datasets, one of which defines the contour of the core structure and the second partial dataset defines the contour of the shell structure, a green body of the core structure is produced by means of the first CAD partial data set, and a green body of the shell structure of the prosthesis is produced by means of the second CAD partial data set. The core and shell structures are then joined together in the state of a green body, then the green body is subjected to a heat treatment to remove the binder, and then the assembly is sintered to obtain a finished dental restoration. The method enables the manufacture of dental prostheses with improved aesthetic properties without significant additional efforts compared to the manufacture of unitary prostheses.

The invention discloses a high-safety high-voltage switch, and relates to the technical field of high-voltage switchs.The high-voltage switch comprises a bottom plate, a box body is fixedly connected to the top of the bottom plate, a top plate is fixedly connected to the top of the box body, a high-voltage switch body is fixedly connected to the top of the bottom plate, and a circuit breaking mechanism is arranged in the box body; a heat dissipation mechanism is arranged in the box body, and a dustproof mechanism is arranged in the box body. An electromagnetic relay can control an electric telescopic rod to lift a ceramic sleeve through a low-voltage control circuit, on-off of a high-voltage switch is controlled through a small circuit, control is safe, and when the ceramic sleeve switches on and off the high-voltage switch, an air pump can be controlled to be started through a second electromagnetic relay; the high-pressure spray head can spray high-speed airflow to perform air-blast arc extinguishing on the high-pressure switch, the safety of the high-pressure switch during on-off can be ensured by matching with the arc extinguishing cover, heat in the box body is quickly cooled through the heat dissipation mechanism, and the internal environment of the box body is ensured to be at a safe temperature.

This utility model discloses a cold water tank pulley guiding device, relating to the technical field of chemical fiber production equipment. It includes a cold water tank with a pulley shaft at the bottom. A polytetrafluoroethylene (PTFE) pulley is rotatably mounted on the pulley shaft via a full ceramic bearing. The PTFE pulley has multiple wire guide grooves on its sidewall. The use of the PTFE pulley and full ceramic bearing effectively avoids the problem of traditional metal bearings easily corroding and jamming in cold water environments, improving the stability and service life of the device. Simultaneously, the multiple wire guide grooves on the sidewall of the PTFE pulley make the monofilament guiding process smoother, improving the dragging and jamming phenomenon during the production of soft monofilaments, ensuring the smooth passage of monofilaments through the cold water tank, and guaranteeing a stable cooling rate for the monofilaments, thereby improving the appearance and performance uniformity of the finished product.

The present application belongs to the technical field of refractory materials, and discloses a hot-state repairing material composite ceramic fiber blanket and a hot-state repairing construction method thereof. The hot-state repairing material composite ceramic fiber blanket comprises, from top to bottom, an upper layer, a filling layer and a bottom layer; a plurality of staggered partition cloths are arranged between the upper layer and the bottom layer, the partition cloths are vertically arranged to form a net structure to divide the filling layer into a plurality of small cells, and the hot-state repairing material is filled in the small cells; and the upper layer, the bottom layer and the partition cloths are all ceramic fiber cloths. The hot-state repairing material is combined with the ceramic refractory fiber, the hot-state repairing material is filled in the small cells in the ceramic fiber blanket through structural design, the ceramic fiber blanket is used during transportation and construction, the advantages of the fiber blanket, such as high integrity and fast construction, are fully exerted, the ceramic fiber blanket is converted into a hard overall furnace lining after construction and sintering, and the fast sintering repairing performance of the hot-state repairing material is exerted.