972 results about "Melting temperature" patented technology

The invention discloses a matte glaze and a preparation method thereof. The matte glaze comprises the following components by weight: 1-5 parts of zinc oxide, 5-15 parts of barium carbonate, 0-15 parts of zirconium silicate, 10-25 parts of potassium feldspar, 10-20 parts of kaolin, 5-15 parts of calcite, 5-15 parts of calcined talcum powder, 20-35 parts of a matte frit and 0.5-1 part of an additive. Specifically, the matte frit comprises the following components by weight: 30-50 parts of SiO2, 15-20 parts of Al2O3, 0.01-0.5 part of Fe2O3, 3-10 parts of CaO, 0.5-5 parts of MgO, 1-5 parts of K2O, 3-10 parts of Na2O, 3-10 parts of ZnO, 0.1-1 part of B2O3 and 10-25 parts of BaO. By introducing the matte frit, the melting temperature of the formula is lowered, the firing range of the formula isbroadened, and the glaze texture achieves a fine matte effect.

The invention relates to the field of intelligent control, and provides an automatic control method and system of a fly ash melting processing system, which adopts an image analysis and data processing algorithm based on artificial intelligence to carry out state analysis of a molten liquid state image and time sequence association of melting temperature data in a melting furnace. Therefore, the heating power recommendation decoding value of the next time point is intelligently obtained according to the prompt enhancement joint representation between the molten liquid state characteristic and the melting temperature time sequence correlation characteristic. Thus, compared with a traditional fixed temperature set value, the system can analyze the state of the melting process in real time, dynamically and accurately adjust the heating power and ensure that the temperature is always kept within the optimal range, so that temperature fluctuation is reduced, the stability of the melting process is kept, and intelligent monitoring and control over the fly ash melting process are achieved.

A screen making machine includes a table, welder assembly, and actuation assembly. The welder assembly includes: a hot air nozzle, a pump, and a roller. The actuation system moves the welder assembly along the frame. Hot air from the nozzle elevates the temperature of the mesh and adjacent frame to an elevated temperature above a melt temperature of the surfaces of the mesh and frame. The roller presses the melted mesh surface against the melted frame surface, to melt fuse them together.

Provided are: a window material and a light-transparent roof material which can autonomously change white turbidity in accordance with the temperature, and which have a simple structure and are easy to manufacture; and a vehicle, a ship, or an airplane, and a building comprising the window material and / or the light-transparent roof material. A window material or a light-transparent roof material according to the present invention comprises at least one light-transparent base material layer and at least one pressure-sensitive adhesive layer. The pressure-sensitive adhesive layer is formed from a pressure-sensitive adhesive composition containing, with respect to 100 parts by mass of a pressure-sensitive adhesive agent, 1-20 parts by mass of a thermosensitive noncrosslinked polymer and 1-100 parts by mass of thermosensitive crosslinked fine particles. The refractive index of the thermosensitive crosslinked fine particles is reduced as the temperature increases, and the reduction rate of the refractive index is larger in the vicinity of the melting temperature of the thermosensitive crosslinked fine particles than in a temperature range other than the vicinity of the melting point. The adhesive power of the pressure-sensitive adhesive composition is reduced as the temperature increases, and the reduction rate of the adhesive power is larger in the vicinity of the melting temperature of the thermosensitive non-crosslinked polymer than in the temperature range other than the vicinity of the melting point.

The invention provides a leakage-proof load-bearing non-woven fabric hand bag and a manufacturing process, and relates to the technical field of non-woven fabric hand bag manufacturing. A multi-layer composite structure design is constructed, and a layered non-woven fabric hand bag manufacturing technology based on outer layer protection, middle functions and inner layer load bearing is provided; on this basis, the process steps of vacuum adsorption permeation, differential cooling and the like of the high-porosity PET needle-punched non-woven fabric and the overheat melting PLA material are introduced, and the needle-punched density, the PLA melting temperature, the vacuum degree, secondary heating and the cooling rate of the bent position / non-bent position are strictly controlled, so that PLA is fully permeated in PET fiber pores, and the local rigidity is directionally enhanced; the comprehensive performance of the leakproof load-bearing non-woven fabric hand bag and the manufacturing process hand bag is obviously improved.

The invention discloses a smelting simulation method based on a digital twinning technology, and relates to the technical field of data processing, and the method comprises the following steps: obtaining size data and historical temperature data of a smelting furnace, and constructing a temperature distribution model; acquiring real-time temperature data of the smelting furnace; identifying a smelting stage according to the real-time temperature data; the corresponding temperature distribution model is selected according to the smelting stage, and a smelting temperature compensation value is calculated; according to the smelting temperature compensation value, the heating power of the smelting furnace is adjusted; wherein the temperature distribution model comprises a temperature distribution model of a preheating stage and a temperature distribution model of a melting stage. According to the method, the size data of the smelting furnace, the historical temperature data of the preheating stage and the historical temperature data of the melting stage are obtained, the temperature distribution model is constructed, the corresponding temperature distribution model is selected according to the obtained real-time temperature data, the numerical value, needing to be adjusted, of the temperature of the smelting furnace is calculated, the smelting efficiency is improved, and meanwhile energy consumption is reduced.

The invention relates to a copper cable insulation layer extrusion molding method and system based on dynamic temperature control, and belongs to the technical field of copper cable production. The method comprises the steps that the surface temperature of a copper core before the copper core enters an extrusion die head and the melt temperature of a plurality of independent temperature control sections divided by the extrusion die head in the material advancing direction are obtained in real time; meanwhile, feedback adjusting quantity is calculated based on the temperature difference between the melt temperature and the preset target melt temperature, the feed-forward compensation quantity and the feedback adjusting quantity are superposed to obtain comprehensive adjusting quantity of the heating power of each section, and real-time closed-loop adjustment is conducted on the heating power of each section of the extrusion die head according to the comprehensive adjusting quantity; and the flow and the temperature of the cooling medium are adaptively adjusted according to the temperature gradient of the surface temperature along the axial direction, and non-uniform gradient cooling is carried out on the insulating layer. The copper cable insulation layer extrusion molding method and system based on dynamic temperature control at least solve the problems of poor thickness uniformity of an insulation layer, large internal residual stress and unstable adhesive force with a copper core in the prior art.

The invention discloses a layered structure metal composite material based on a liquid phase separation phenomenon and a preparation method thereof, and the preparation method comprises the following steps: step 1, weighing raw materials which comprise at least two kinds of metal which is difficult to mix and melt; 2, the temperature of the metal material in the step 1 is increased to be above the liquidus of the metal material, and a mixture with uniform components is obtained; (3) cooling the mixture smelted in the step (2) to a liquid-phase non-mixed-melting temperature interval until the mixture is completely separated; and 4, the required metal composite material with the layered structure can be obtained after cooling. According to the invention, a method of continuous liquid phase separation and melt solidification along with a furnace is adopted, and the preparation of the layered composite material is realized by regulating and controlling alloy elements and process parameters; the preparation method is easy to operate, low in cost and high in efficiency, a metallurgical bonding interface can be obtained, and the problem that the bonding strength of a dissimilar material composite interface is low is solved.

The invention relates to the technical field of terminal processing, in particular to a cold-pressed terminal processing control method and system and related equipment, and the method comprises the steps: determining the temperature fluctuation intensity of each position point at each collection moment; determining a noise elimination weight of each position point at each acquisition moment; determining the melt temperature difference of any section at each acquisition moment, and determining the temperature control response capability of the heating element in any section at each acquisition moment in combination with the change trend of the temperature fluctuation intensity of each position point at each acquisition moment and all adjacent moments thereof; and the temperature of the charging barrel of the injection molding machine is regulated and controlled by combining the significant conditions of the gray values of all the pixel points in the gray-scale map of the plastic cold-pressed terminal. By comprehensively analyzing the temperature of the plastic melt in the charging barrel, the precision of temperature control in the processing process of the plastic cold-pressed terminal is improved.

The invention discloses a preparation method of a copper-tungsten composite material, which comprises the following steps: material preparation: taking a copper rod and a tungsten rod, and carrying out oil removal and ultrasonic cleaning on the copper rod and the tungsten rod; a tungsten rod is placed in a forming hole of a graphite mold, then a copper rod is placed on the top of the tungsten rod, the bottom end of the copper rod is provided with a circular truncated cone part, and an obtuse angle alpha is formed between the side face of the circular truncated cone part and the side face of the tungsten rod; feeding into a furnace: feeding the graphite mold with the copper rod and the tungsten rod into a vacuum furnace; vacuumizing is conducted, specifically, the vacuum furnace is vacuumized, and the vacuum degree is 10 <-3 >-10 <-5 > Pa; vacuum melting: heating a vacuum furnace to carry out vacuum melting, wherein the melting temperature is 1200-1320 DEG C; keeping high temperature: keeping the temperature at 1200-1320 DEG C for 5-10 minutes; controlled cooling: cooling to obtain a composite material; and post-treatment: carrying out heat treatment and machining on the composite material. Compared with the prior art, preparation of the high-quality copper-tungsten composite material can be achieved.

The invention belongs to the technical field of brazing materials, and particularly relates to micro-nano particle reinforced nickel-based ultralow-melting-point wear-resistant brazing filler metal and a preparation method and application thereof. The invention provides micro-nano particle reinforced nickel-based ultralow-melting-point wear-resistant brazing filler metal. The micro-nano particle reinforced nickel-based ultralow-melting-point wear-resistant brazing filler metal comprises 94-99 parts of ultralow-melting-point nickel-based brazing filler metal and 1-6 parts of micro-nano particles. The ultralow-melting-point nickel-based brazing filler metal contains B, Si, In, Sn and Cu elements at the same time, and the melting temperature of the brazing filler metal can be cooperatively reduced; and meanwhile, the micro-nano particles are added, so that the strengthening and abrasion increasing effects on the nickel-based brazing filler metal can be effectively guaranteed, and meanwhile the flowability of the brazing filler metal is not affected. Therefore, through component design of the nickel-based brazing filler metal and synergistic cooperation of the micro-nano particles, the melting point of the brazing filler metal can be remarkably reduced, the brazing filler metal can be endowed with excellent hardness and wear resistance, and the technical bottlenecks that traditional nickel-based brazing filler metal is high in melting temperature and poor in wear resistance and brazed diamond is subjected to thermal damage are solved; and the method has a wide application prospect in brazing of diamond tools.

The invention discloses a ceramic tile with an eggshell glaze surface effect and a preparation method of the ceramic tile. The ceramic tile sequentially comprises a green body layer, a first cover glaze layer, a second cover glaze layer, a pattern layer and an eggshell dry granular glaze layer from bottom to top, wherein the preparation raw materials of the eggshell dry granule glaze layer comprise first matte dry granules, second matte dry granules and bright dry granules, the particle size of the first matte dry granules is larger than that of the second matte dry granules, and the particle size of the second matte dry granules is the same as that of the bright dry granules; and the initial melting temperature of the first cover glaze layer is higher than that of the second cover glaze layer. In the high-temperature firing process, the first matte dry particles with large particle sizes form matte convex areas, the second matte dry particles with small particle sizes and the bright dry particles form concave areas with higher glossiness, and the bright dry particles in the concave areas are randomly distributed to form bright spots, so that a vivid eggshell glaze surface effect is obtained; the first surface glaze layer is filled with the second surface glaze layer which is melted firstly, so that the glaze surface, the touch feeling and the antifouling performance are improved.

The invention belongs to the technical field of ceramic tiles, and particularly discloses a marble ceramic tile and a preparation method thereof. The marble ceramic tile sequentially comprises a green body layer, a cover glaze layer, a pattern layer and a marble glaze layer, the marble glaze layer is formed by marble glaze, and the marble glaze comprises a prefabricated material composed of first dry particles, second dry particles and protective glaze according to a specific proportion, wherein the first dry particles, the second dry particles and the protective glaze are different and have a specific range of initial melting temperature and particle size. By innovating the formula of the glaze layer, the prepared marble ceramic tile has stereoscopic impression and natural sense which are closer to those of natural marble, the glaze surface is fine and smooth, and meanwhile, the marble ceramic tile also has better wear resistance, antifouling property and acid-base resistance and has better application prospects.

The invention relates to the technical field of basalt scales, and discloses a modified basalt scale material. The invention discloses a modified basalt flake material, which comprises 70-85% of basalt flake, 5-8% of amino silane, 3-5% of nanometer titanium dioxide, 0.5-2% of self-repairing monomer, 3-5% of microcapsule material, 2-4% of environmental response material, 1-2% of nanometer silicon particle and 1-4% of chemical sensing molecule, and the invention also provides a preparation method of the modified basalt flake material. The preparation method comprises the following steps: S1, carrying out high-temperature melting treatment on basalt scales, wherein the melting temperature is 1350-1450 DEG C; through the composite coating of the microcapsule material and the epoxy acrylate, the coating can be automatically repaired after being damaged. Compared with a traditional coating self-repairing capability scheme, the material provided by the invention can quickly activate a repairing monomer when cracks occur, has a quick and continuous self-repairing function, and effectively avoids the problems that the coating repairing process is slow and the effect is short.

One or more aspects of the present disclosure provide for composite elements that include a textile having a plurality of fibers, the plurality of fibers comprising a first thermoplastic material; and a second thermoplastic material surrounding the plurality of fibers of the textile and consolidating at least a portion of the textile, wherein the second thermoplastic material has a melting temperature lower than a melting temperature of the first thermoplastic material. The composite elements can be used as part of a fluid chamber or cushioning element, whereby the composite element imparts puncture resistant to the fluid chamber or cushioning element. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present disclosure.

The invention discloses a PCD (Poly Crystal Diamond) cutter and a layered welding process, and relates to the technical field of cutter welding, the laser welding process of the PCD cutter is essentially characterized in that brazing filler metal is heated by high heat energy of a high-energy laser beam, and the welding process is completed by attaching a PCD composite sheet. In order to avoid the problem that high heat energy of a high-energy laser beam causes graphitization on the PCD clad sheet, the whole welding tool is optimized, and the welding tool is essentially characterized in that firstly, the installation mode of the PCD clad sheet relative to a tool base body is changed, so that the heating process of the laser beam cannot directly affect the PCD clad sheet, only the hot melting temperature of a brazing filler metal layer is maintained, and the welding speed of the PCD clad sheet is increased; and on the basis, a rotating mode of the PCD composite sheet relative to the cutter base body is provided, so that the PCD composite sheet is fully attached to the cutter base body, the welding quality is analyzed according to an electrical sensing mode, and the key purpose is that the welding quality of the PCD cutter is improved by maintaining the attaching mode of the PCD composite sheet and the cutter base body.

An electrically conductive ceramic-metal composite brick is formed of a Cr2O3 containing ceramic material into which is incorporated metallic chromium agglomerates having a melting temperature in excess of 1300 C, in some instances in excess of 1500 C. The ceramic-metal composite brick can be incorporated into an electrically heated thermal energy storage system or a resistive heating system as one or both of a heating element and an electrode.

The invention relates to the field of industrial data acquisition control, and provides a semi-solid magnesium alloy injection casting temperature feedback control method and equipment, and the method comprises the steps: monitoring and obtaining sensor temperature data at a plurality of moments in a semi-solid magnesium alloy injection casting process; acquiring a plurality of detection time periods and predicted temperature data thereof; analyzing the difference and variation trend between the sensor temperature data and the predicted temperature data in each detection time period, and quantifying the temperature deviation factor of each detection time period; based on the correlation of the change trend between the sensor temperature data and the predicted temperature data in each detection time period, the change of the correlation under the time sequence change of the detection time period is analyzed, and the temperature deviation accuracy of each detection time period is obtained; and correcting the sensor temperature data at each moment to obtain melt temperature data at each moment, and performing feedback control. The invention aims to solve the problem that the overall temperature feedback control effect is influenced by local temperature change in the magnesium alloy injection casting process.

The invention relates to the field of intelligent monitoring of glass production, and particularly discloses a glass production early warning system and method based on the Internet of Things. The method comprises the following steps: firstly, collecting melting temperatures, melting pressures and monitoring images of a plurality of preset time points in a melting forming process of a to-be-monitored glass tank as input data, and then performing deep convolutional coding and analysis on the input data by using a machine vision technology to obtain a classification result; the classification result is used for representing that the melting temperature needs to be increased or decreased and the melting pressure needs to be increased or decreased in the melting forming process of the to-be-monitored glass tank. Thus, according to the classification result, intelligent control over the fusion forming process parameters can be achieved, and therefore the production quality of the glass cans is better ensured.

The invention discloses a fly ash processing production line intelligent control system and method based on big data analysis, and relates to the technical field of intelligent control, and the method comprises the following steps: obtaining a molten liquid state image and melting temperature data; state feature extraction is carried out on the obtained molten liquid state image, and time sequence feature extraction is carried out on the melting temperature data; performing fusion coding to obtain cross-modal guide joint coding features between the molten liquid state and the melting temperature, and training a control model through reinforcement learning; monitoring a molten liquid state image and melting temperature data in real time, and obtaining a control instruction based on the control model; and carrying out data feedback, carrying out comparative analysis on the data and an expected control target, and optimizing cross-modal guide joint coding characteristics between the molten liquid state and the melting temperature. According to the method, the state image and the temperature data of the molten liquid are collected in real time, multi-dimensional feature extraction and fusion coding are carried out, a control system is trained, and accurate prediction and adjustment of the heating power are achieved.

The invention relates to the field of battery materials, in particular to a binder material, a preparation method, a positive electrode material and a battery. The preparation method provided by the invention comprises the following steps: mixing and grinding a raw material compound and an additive into mixed powder; heating the mixed powder to a melting temperature in a protective gas atmosphere and carrying out a reaction to obtain a molten mass; the molten mass is cooled based on the rapid quenching technology, a nanocrystalline area and an amorphous area are formed in the molten mass cooling process, and a composite structure thin strip is obtained after cooling; forming a lithium-rich layer on at least part of the surface of the composite structure particle; providing a carbon source, mixing the composite structure particles forming the lithium-rich layer with the carbon source, and then carrying out heating treatment to form a carbon layer wrapping the surfaces of the composite structure particles and the lithium-rich layer; and epitaxially growing a carbon nanotube layer on the outer surface of the carbon layer, and obtaining the binder material after the epitaxial growth is completed. A novel binder material which has good ion / electron conductivity, mechanical properties adapting to volume change and suitable processing characteristics is found.

The invention provides a novel quartz crucible which comprises a crucible wall and is characterized in that a protective layer surrounding the crucible wall is arranged on the outer side of at least one part of the crucible wall, and the protective layer is a transparent layer. Compared with an existing quartz crucible structure, the quartz crucible provided by the invention has the advantages that the transparent state layer with compactness is additionally arranged, so that the strength of the outermost layer of the quartz crucible can be improved, the reaction probability of the quartz crucible and a carbon crucible can be reduced, and the service life of the quartz crucible is prolonged. The invention further provides a manufacturing process for the quartz crucible, the thickness of each layer and the distribution condition of quartz sand in each layer are controlled by adjusting the vacuum condition and the melting temperature during melting, and a uniform and compact transparent protection layer is obtained on the outer wall surface of the crucible wall of the existing quartz crucible; the reaction probability of the outermost side of the quartz crucible and the carbon crucible is reduced to the maximum extent, the strength of the quartz crucible is improved, and the service life of the quartz crucible is prolonged.

The invention discloses MgAl ply rolling composite brazing filler metal and a preparation method and a brazing method thereof, belongs to the technical field of magnesium alloy welding materials, and solves the technical problems that magnesium alloy brazing filler metal prepared through a smelting method is insufficient in welding strength, and the thickness of the brazing filler metal is difficult to reduce through secondary machining before welding. According to the solution, Mg rolled plates and Al rolled plates are manufactured through hot rolling after being staggered and stacked according to an Al rolled plate-Mg rolled plate-Al rolled plate sandwich structure, the lengths and the widths of the Mg rolled plates and the Al rolled plates are the same, the thicknesses of the Mg rolled plates and the Al rolled plates are both 0.4-0.6 mm, the thickness of the MgAl pack rolling composite brazing filler metal does not exceed 500 micrometers, the melting temperature is 437-455 DEG C, and the brazing temperature is 460-500 DEG C. The preparation technology is simple, the low-melting-point eutectic structure of the MgAl ply rolling composite brazing filler metal can be generated in a diffusion mode in the brazing process, and brazing filler metal preparation and brazing processes are achieved in one step.

The present invention discloses a melting device for sintered neodymium iron boron permanent magnet materials, which relates to the technical field of melting of neodymium iron boron permanent magnet materials and includes: a melting tank, a melting assembly and a feeding assembly; the melting assembly includes a heating assembly arranged inside the melting tank, and a stirring assembly is arranged at the bottom end of the heating assembly; the feeding assembly includes a pushing assembly arranged at the top end of the melting tank, and a recycling assembly is arranged on the side of the pushing assembly; the recycling assembly includes a recycling part, a condensation part and a material returning part, the recycling part is connected to the condensation part through a pipeline, and the bottom end of the condensation part is fixedly connected with the material returning part; the stirring assembly further includes a piston part, a driving part and an adjusting part, the bottom end of the piston part is fixedly connected with the driving part, and the bottom end of the driving part is fixedly connected with the adjusting part. The present invention can ensure uniform distribution of the melting temperature and recycle neodymium vapor, improving the melting effect.

The invention belongs to the technical field of brazing materials, and discloses high-entropy composite brazing filler metal and a preparation method and application thereof. The high-entropy composite brazing filler metal comprises a nickel-based brazing filler metal matrix and high-entropy alloy powder, and the high-entropy alloy powder comprises, by atomic percent, 15%-25% of Co, 15%-25% of Cr, 15%-25% of Fe and 25%-45% of Ni. According to the high-entropy composite brazing filler metal, the low melting temperature is kept, the high-entropy alloy particles can adjust joint residual stress caused by the large difference of thermal expansion coefficients of dissimilar materials, the interface regulation and control effect is achieved, generation and distribution of joint brittle phases are affected, a special core-shell structure is formed around the high-entropy particles, and therefore the high-entropy composite brazing filler metal can be obtained. A continuous brittle phase formed by a joint can be broken, crack propagation is prevented, the mechanical property of the joint is remarkably improved, the brazing filler metal preparation method is simple and easy to implement, and the high-entropy composite brazing filler metal adopts an instantaneous liquid diffusion brazing mode, so that weld joint structure components are homogenized.

The invention discloses rare earth co-doped alkali-free aluminum borosilicate glass and application, and the rare earth co-doped alkali-free aluminum borosilicate glass comprises the following components in percentage by mole: 68.85-69.60% of SiO2; 13.50%-14.15% of Al2O3 (aluminum oxide); 1.50 to 1.70 percent of B2O3 (boron trioxide); 4.45% to 4.60% of MgO; 5.45% to 5.80% of CaO; 1.20% to 1.80% of SrO; 0.50 to 2.80 percent of La2O3 (La2O3); 0.70% to 3.00% of Y2O3; and 0.10%-0.30% of SnO2. The rare earth co-doped alkali-free aluminum borosilicate glass has a high strain point, a low melting temperature, a low thermal expansion coefficient and a high elastic modulus, production energy consumption is reduced as much as possible under the condition that various properties are improved, and the production and manufacturing requirements of OLED display panels are met.

To provide a side trimming method and a side trimming device which can suppress, in a trimming of a sheet material coated with resin whose melting temperature is 200°C or less, adhesion and accumulation of resin on a surface of a cutting tool thereby achieving long life of the cutting tool.SOLUTION: A side trimming method which trims a metal strip side part of a metal strip while transferring the metal strip coated with resin whose melting temperature is 200°C or less on one surface thereof. In the method, a first cutting tool that is a rotary cutter is adjacent to the metal strip side part on the one surface and arranged at a position on the inside of the metal strip in a width direction, a second cutting tool that is a rotary cutter is arranged at the metal strip side part as an outer side of the metal strip in the width direction than the first cutting tool on the other surface of the metal strip, and the second cutting tool is relatively guided into the metal strip in a vertical direction while rotating the first cutting tool and the second cutting tool so as to trim the metal strip side part of the metal strip.SELECTED DRAWING: Figure 3

The invention relates to the technical field of laser welding, in particular to light-proof material laser welding equipment. Comprising a housing; the control panel is installed on the side face of the machine shell. The workbench is arranged in the machine shell; the control box is mounted in the workbench; the laser generator is mounted in the workbench; the number of the laser emitting heads is two, and the two laser emitting heads are both located above the workbench; the rotary table is rotationally connected to the workbench; the fixing frames are circumferentially connected to the top of the rotary disc at intervals. The end faces of the two workpieces can be heated to the melting temperature through the two laser emission heads correspondingly, then a linkage structure of the fixed frame, the sliding frame and the rotating frame is arranged, precise control of the first servo electric cylinder and the second servo electric cylinder is matched, precise overturning and positioning of the workpieces can be achieved, and the working efficiency is improved. The end faces of the two light-proof material workpieces can be accurately butted, pressing welding is carried out, the application range is wide, working procedure switching is not needed, and the production efficiency can be improved.

Repair of parts made of ceramic matrix composite material. A method for repairing a part (11) made of ceramic matrix composite material (100) comprising a fibrous reinforcement of refractory fibers densified by a matrix comprising at least one ceramic material. The method comprises removing the composite material (100) from a damaged area of ​​the part so as to form a hollowed portion. It further comprises: - the deposition of one or more repair strips (40) in the hollowed portion, each repair strip comprising at least one silicon powder, one powder of a ceramic material identical to said at least one ceramic material of the matrix, and a binder; and - heating the deposited repair strip(s) (40) to a temperature above the melting point of silicon. Figure for the abstract: Fig. 5.

The invention relates to the field of animal bone ash ornaments, and discloses animal bone ash spar and a preparation method thereof, and the animal bone ash spar comprises the following raw materials by weight: 8-12 parts of animal bone ash, 32-48 parts of a phosphoric acid solution, 1-2 parts of bismuth oxide, and 0.04-0.06 part of a fluxing agent. According to the formula, the melting temperature of the animal bone ash can be reduced, the production cost is saved, and the clarity and transparency of the animal bone ash spar can be improved.