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93 results about "Ceramic brackets" patented technology
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Tissue engineering bone cartilage composite bracket and integrated photocuringable forming method thereof
InactiveCN102430151AHigh bonding strengthImprove stabilityProsthesisComputer Aided DesignCeramic brackets
The invention discloses a tissue engineering bone cartilage composite bracket and an integrated photocuringable forming method thereof. The tissue engineering bone cartilage composite bracket serves as a ceramic bracket, wherein the ceramic bracket is served as a bone-repair part, and a porous structure is arranged on the surface of the ceramic bracketbone-repair part of the porous structure; and the ceramic bracket is fixed on a supporting plate of a photocuringable quick forming machine. A laser scanning path is driven through a computer aided design (CAD) model; and laser directly exposes and cures a hydrogel bracket and a pure hydrogel bracket which contain a ceramic component onto the ceramic bracket sequentially to form a three-layer composite bracket. Therefore, quick and fine preparation of a three-dimensional composite bracket of bone cartilage-like tissue histomorphometry is realized; uncontrollable structures and low efficiency because of handwork in the preparation process of a traditional composite bracket are avoided; the preparation efficiency is improved; and a calcified cartilage-like layer bracket and a hydrogel cartilage bracket with subtle structures can be bonded and compounded on the surface of the ceramic bracket by means of a rivet and a two-phase material.
Owner:XI AN JIAOTONG UNIV
Preparation methods of ceramic slurry for air pressure extrusion type three-dimensional printing and biological ceramic bracket
ActiveCN105196398AImprove liquidityHigh standardAdditive manufacturing apparatusCeramic shaping apparatusCeramic bracketsWater soluble
The invention discloses a preparation method of ceramic slurry for air pressure extrusion type three-dimensional printing. The preparation method comprises the following steps: (11) adding biological active ceramic powder into a solvent, performing ball grinding by a planetary ball grinder for 3 to 12 hours, and obtaining slurry, wherein the solid phase content of the slurry is 35 to 55 vol%; (12) adding a water-soluble rheological additive into the slurry obtained in the step (11), performing ball grinding by the planetary ball grinder for 0.5 to 3 hours, then transferring the slurry into a material feeding barrel, performing ultrasonic oscillation and low-temperature debubbling in sequence, and obtaining the ceramic slurry for air pressure extrusion type three-dimensional printing. The invention further discloses a preparation method of a biological active ceramic bracket by adopting an air pressure extrusion type three-dimensional printing forming technology. The ceramic slurry prepared by the preparation method disclosed by the invention is high in solid phase content and good in printing performance and coagulability; the prepared biological active ceramic bracket can be connected by 100 percent, and the appearance structure and the internal size of the biological active ceramic bracket can be controlled.
Owner:广州康睿医疗器械有限公司
Orthodontic adhesive
InactiveUS6090867AMeasured adhesion valueSolution value is not highImpression capsSurgical adhesivesAdhesivePlasticizer
An adhesive system has been developed for orthodontic ceramic brackets which minimizes tooth fracture and makes bracket removal easier and more predictable. The adhesive system makes use of current filled adhesives and a plasticizer (e.g. diethyl phthalate, xylene, etc.). Additions of plasticizer between 10 to 20 weight percent of the adhesive will decrease the adhesion in excess of 50%. This adhesive permits more patient comfort while at the same time allowing for the use of ceramic brackets.
Owner:GEORGIA TECH RES CORP
Preparation method for calcium polyphosphate-tricalcium phosphate bone bracket
A preparation method for calcium polyphosphate-tricalcium phosphate bone bracket comprises the steps of proportionally ball-milling and mixing calcium phosphate ceramic powder, size stabilizer methylcellulose, surfactant polyvinyl alcohol, foaming agent hydrogen peroxide and de-ionized water in order to prepare compound ceramic slurry, pouring the slurry into a mould, drying in an oven with four-step drying method, and then sintering the dried green body under high temperature in order to acquire porous calcium phosphate ceramic bracket. The big aperture of a big pore of the acquired porous calcium phosphate ceramic bracket of the invention is 200 to 600 microns, the micro-pore aperture thereof is 2 to 5 microns, the whole porosity thereof is from 60 to 90 percent and the compressive strength thereof is 0.5 to 7.0 Mpa. Furthermore, the method has low cost and high efficiency and can be applied to large-scale production.
Owner:SHANGHAI NAT ENG RES CENT FORNANOTECH +1
Deep ultraviolet LED packaging structure and preparation method thereof
The invention discloses a deep ultraviolet LED packaging structure and a preparation method thereof. The deep ultraviolet LED packaging structure comprises a ceramic bracket, a deep ultraviolet LED chip, quartz glass and a metal coating layer, wherein the ceramic bracket is of a bowl cup structure, and the deep ultraviolet LED chip is arranged in the ceramic bracket; the quartz glass is arranged at the upper end of the ceramic bracket, and a closed cavity is formed between the quartz glass and the ceramic bracket; and the outer surface of the closed cavity is coated with the metal coating layer and does not include the bottom surface of the closed cavity and the outer surface region, directly facing towards the inside of the closed cavity, of the quartz glass. The outer surface of the closed cavity is coated with the metal coating layer, so that the binding force and airtightness between the quartz glass and the ceramic bracket are improved, the problem that the quartz glass and the ceramic bracket are separated after the deep ultraviolet LED packaging structure works for a long time is solved, and the reliability of the deep ultraviolet LED packaging structure is improved.
Owner:SHINEON BEIJING TECH
Metal mesh on ceramic bracket; ceramic bracket with metal insert; metal bracket with tooth-colored coating; self-legating, low profile, metal bracket; and methods of making same
An orthodontic bracket includes a bracket portion including a receiving slot extending across at least a portion of the bracket portion and configured to receive an arch wire. The bracket includes a metal mesh bonded to the ceramic bracket portion on a side of the ceramic bracket portion opposite the receiving slot. Another orthodontic bracket includes a metal core coated with a tooth-colored coating. Methods of attaching and aligning the brackets are provided as well as a tool for aligning the brackets. Inserts are also described for reinforcing the brackets and / or increasing a surface area for enhancing bonding strength.
Owner:EICHELBERGER JOHN E +2
Orthodontic highly-transparent ceramic bracket and making method thereof
An orthodontic highly-transparent ceramic bracket comprises a baseboard, and trough limbs, a trough slot and a ligation limb slot which are arranged on the baseboard, and the ceramic bracket is a yttrium aluminum garnet ceramic bracket, a magnesium aluminate spinel ceramic bracket or a spinel aluminum oxynitride ceramic bracket, and has a linear transmittance of above 70%. A preparation method of the highly-transparent ceramic bracket comprises the following steps: 1, slurry preparation: ball-milling raw materials with Al2O3 balls as a ball milling medium for 24-48h, wherein the raw materials comprise transparent ceramic powder, a composite sintering aid, polyacrylic acid and deionized water, the composite sintering aid accounts for 0.1-0.6% of the weight of the transparent ceramic powder, polyacrylic acid accounts for 1-5% of the weight of the transparent ceramic powder, the ratio of the total weight the transparent ceramic powder, the composite sintering aid and polyacrylic acid to the weight of deionized water is 1:4-8, and the transparent ceramic powder is yttrium aluminum garnet ceramic powder, magnesium aluminate spinel ceramic powder or spinel aluminum oxynitride ceramic powder; 2, molding and biscuit treatment; and 3, sintering.
Owner:SICHUAN UNIV
Three-dimensional printing porous bredigite biological ceramic bracket, and preparation method and application thereof
ActiveCN107235721AGood Aperture ConnectivityHigh porosityAdditive manufacturing apparatusCeramic shaping apparatusCalcium biphosphateBone tissue
The invention discloses a three-dimensional printing porous bredigite biological ceramic bracket, and a preparation method and application thereof. The method comprises the following steps: firstly, obtaining a sizing agent by blending bredigite powder, sintering aids and a binder aqueous solution at a certain ratio, then utilizing a three-dimensional printing technique to prepare a ceramic bracket blank with a controllable porous structure, and then sintering at high temperature, thereby obtaining a bredigite biological ceramic bracket material with a porous structure and excellent mechanical properties. The three-dimensional printing porous bredigite biological ceramic bracket prepared according to the preparation method has controllable pore diameter and porosity, high biocompatibility, excellent mechanical properties obviously better than the mechanical properties of a calcium phosphate ceramic bracket with the same structure, and excellent induced osteogenesis activity and angiogenesis activity, and is expected to be used for boosting the regeneration repairing of various defected bone tissues.
Owner:YANTAI ZHENGHAI BIO TECH
Beta-dicalcium silicate porous biological ceramic bracket and preparation method and application thereof
ActiveCN103058707ARepair damageIncrease exchange ratePharmaceutical delivery mechanismTissue regenerationAfter treatmentBone tissue engineering
The invention discloses a beta-dicalcium silicate porous biological ceramic bracket and a preparation method and an application thereof. The preparation method of the beta-dicalcium silicate porous biological ceramic bracket comprises the following steps: adopting porous organic foam as a precursor; adding the foam precursor in ceramic slurry for impregnating and slurry hanging after treatment; drying and firying after removing spare ceramic slurry so as to manufacture the beta-dicalcium silicate porous biological ceramic bracket. The biological ceramic bracket is good in through hole property, mechanical performance and biological compatibility, and can be applied to bone tissue engineering.
Owner:HUNAN UNIV
Ceramic automatic glazing machine
The invention relates to the field of ceramic processing, in particular to a ceramic automatic glazing machine. The ceramic automatic glazing machine comprises a bottom box assembly, a lifting frame,a ceramic bracket, a fixing sliding frame and a clamping frame. When the ceramic automatic glazing machine is used, the bottom of ceramic needs to be placed at the upper end of a bottom supporting strip, and two clamping rods can clamp the upper end of the ceramic; and the ceramic automatic glazing machine can clamp the ceramic with different sizes, after being clamped, the ceramic can be driven to downwards move through a motor to enter glaze liquid to be glazed, and after glazing is completed, the ceramic can be lifted and air-dried. The lifting frame is slidably connected to the left end ofthe bottom box assembly; the lower end of the ceramic bracket is slidably connected with the lifting frame; the upper end of the ceramic bracket is matched with the lifting frame through a thread; the fixing sliding frame is fixedly connected to the lifting frame; and the clamping frame is slidably connected to the fixing sliding frame.
Owner:醴陵创智机械有限公司
Preparation method of combined porous biological ceramics bracket
ActiveCN101524555AImprove carrying capacityRapid productionProsthesisCeramic bracketsFlexural strength
Owner:西安点云生物科技有限公司
Biological activity ceramic bracket with heterogeneous porous bionic natural bone structure and preparation method of biological activity ceramic bracket
InactiveCN109809810APrecise control of dimensionsPrecise control of shape structureAdditive manufacturing apparatusCeramicwareNatural boneBionics
The invention discloses a biological activity ceramic bracket with a heterogeneous porous bionic natural bone structure and a preparation method of the biological activity ceramic bracket. According to the preparation method of the biological activity ceramic bracket, biological activity ceramic slurry is directly printed and molded by virtue of an advanced direct extrusion molding technology, a porous structure of continuous changing from external compactness to internal loose is established, and bionics of the natural bone structure is realized. The preparation method of the biological activity ceramic bracket comprises the following steps of (1) preparation of biological activity ceramic powder for 3D printing, (2) preparation of the biological activity ceramic slurry, (3) printing of the biological activity ceramic bracket with the heterogeneous porous bionic natural bone structure, and (4) drying and sintering of the bracket, and the biological activity ceramic bracket with the heterogeneous porous bionic natural bone structure is obtained. According to the biological activity ceramic bracket with the heterogeneous porous bionic natural bone structure and the preparation method of the biological activity ceramic bracket, the self-regulating biological activity ceramic powder special for 3D printing is adopted, the advantage of 3D printing technology is combined, accurate control of gradient pore size of the ceramic bracket is realized, the problem of heterogeneous structure accurate establishment is solved, and great significance is achieved for regeneration and repairof bone defects.
Owner:SOUTH CHINA UNIV OF TECH
Ceramic orthodontic bracket with improved debonding characteristics
InactiveUS20100129764A1Easy to disengageSafely withstandArch wiresBracketsDistal portionCeramic brackets
A ceramic bracket has mesial and distal sections that are initially spaced apart from each other by an elongated channel. The bracket is debonded from a patient's tooth at the conclusion of treatment by pivoting one or both of the mesial and distal sections in an arc about a reference axis extending in a direction generally parallel to the channel. The bracket includes a recess that extends across a base of the bracket in generally parallel relationship to the channel. The base of the bracket has an aspect ratio that is less than about 0.95 and enables the bracket to be debonded with less force than might otherwise be necessary.
Owner:3M INNOVATIVE PROPERTIES CO
Method for manufacturing personalized ceramic bracket appliance
The invention discloses a method for manufacturing a personalized ceramic bracket appliance, which comprises the following steps: scanning to obtain the appearance data of the tooth surface of a patient; using a three-dimensional auxiliary design software to obtain a bracket appliance bottom plate attached to the tooth surface to be bonded and a body digital model designed according to the orthodontic treatment requirement; additionally arranging a casting channel after being integrated into a complete bracket appliance model; obtaining a bracket appliance resin wax pattern by using a 3D printing technology; using a casting ceramic material which is consistent with or close to the tooth color of the patient as a raw material; preparing a bracket appliance blank by using an embedding hot die casting technology and deembedding; obtaining the bracket appliance to be bonded after polishing and glazing. The ceramic bracket appliance has the advantages that the manufacturing period is greatly shortened, the tooth surface appearance and the tooth color of different patients can be different, the bracket appliance bottom plate which is perfectly attached to the tooth surface to be bonded and the semitransparent bracket appliance whole body which is consistent with or close to the tooth color of the tooth surface to be bonded are manufactured, the accuracy of bonding positioning is improved through indirect bonding, the personalized reticulated bottom plate also improves the bonding strength of the bracket, so that the effect of invisible orthodontic treatment is achieved, and the personalized customization requirement in clinical treatment is more met.
Owner:SICHUAN UNIV +1
Crystal-coated COB (chip on board) light source with high luminous efficiency for streetlamp and production process for crystal-coated COB light source
InactiveCN104505454AShedding phenomenon occursGood thermoelectric separation effectSemiconductor devicesOn boardCeramic brackets
The invention discloses a crystal-coated COB (chip on board) light source with high luminous efficiency for a streetlamp and a production process for the crystal-coated COB light source. The COB light source comprises a red copper heat dissipation base plate, a lens, an aluminum oxide ceramic bracket and an inverted chip, wherein the inverted chip coats a solid crystal region of the aluminum oxide ceramic bracket through a eutectic furnace under the protection of a hydrogen gas atmosphere; the aluminum oxide ceramic bracket is fixed on a sunken table of the read copper heat dissipation base plate by adopting a reflux welding mode; the lens comprises an extending side part which is upwards turned over and an upwards bumped lens part in the shape of an oval hemispheric peanut; the lens is fixed on the red copper heat dissipation base plate through glue with high light transmittance, and the lens and the red copper heat dissipation base plate are enclosed to form a cavity; the aluminum oxide ceramic bracket which is coated with the inverted chip is fixed in the cavity, and a groove is positioned above a fluorescent powder region of the aluminum oxide ceramic bracket; and a gold-tin alloy with high heat conduction coats the bottom of the inverted chip. The production process for the crystal-coated COB light source with high luminous efficiency for the streetlamp is advanced and high in production efficiency; the obtained product has the advantages of high luminous efficiency, high light transmittance, good light gathering property, excellent heat dissipation, and the like.
Owner:深圳市格天光电有限公司
Wall-mounted type light wave heating double-layer linker solar water heater
InactiveCN102721184AGuaranteed quarantine testingAvoid accidentsSolar heat devicesSolar thermal energy generationEnvironmental resistanceFiber
The invention belongs to the field of a solar water heater and particularly discloses a wall-mounted type light wave heating double-layer linker solar water heater. The wall-mounted type light wave heating double-layer linker solar water heater comprises a bearing type water tank provided with a water inlet and a hot water outlet. The wall-mounted type light wave heating double-layer linker solar water heater is characterized in that: a medium liquid circulating inner coil pipe located inside a water tank is fixed on the water tank through a flange and a flange cover plate; a filament carbon fiber optical wave pipe is arranged in the circulating inner coil pipe; the optical wave pipe is integrally connected with inner and outer enamel optical wave pipe jackets through a ceramic bracket in a sealed manner; and the circulating inner coil pipe is connected with a panel solar collector board through a circulating outlet pipe connected with a medium liquid outlet and a circulating inlet pipe connected with a medium liquid inlet. The wall-mounted type light wave heating double-layer linker solar water heater provided by the invention has the advantages of simple structure, reasonable design, safety in utilization, greenness, environmental friendless, energy conversation and high efficiency, high heating speed, long service life and small occupied space, and is suitable for wide popularization and application.
Owner:SHANDONG JINCANG NEW ENERGY TECH
Heat energy storage element
InactiveCN101532699AEasy maintenanceAdjust the number of groups at willLighting and heating apparatusEnergy efficient heating/coolingStored energyCeramic brackets
The invention relates to an energy storage element, in particular to a heat energy storage element which makes use of electric heating to store energy for a solid. The heat energy storage element comprises a shell, wherein a heating pipe is arranged in the shell, the two ends of the heating pipe are fixed on end covers at the two ends of the shell, the middle parts of the end covers at the two ends of the shell are provided with ceramic insulating stools, the centers of the ceramic insulating stools are provided with electrodes which are connected with the heating pipe, a ceramic bracket is arranged in the shell and is sleeved on the heating pipe, and a solid heat storage body is arranged in a hollow cavity formed by the shell, the ceramic bracket and the heating pipe. The heat energy storage element has the advantages that the volume of the energy storage element can be adjusted according to the capacity of the stored energy, or a plurality of energy storage elements are overlapped; and the maintainability of a single energy storage element is good, the group number of the heat storage capacity can be adjusted at random, and the solid heat storage body can improve the heating temperature to change more electric energy into heat energy to be stored.
Owner:SHENYANG SHIJIE ELECTRIC
Biological active ceramic bracket with nano/micron hierarchical pore structure and preparation method of biological active ceramic bracket
ActiveCN109809811AEasy to controlEvenly dispersedAdditive manufacturing apparatusCeramicwareEmulsionMicrosphere
Owner:广州康睿医疗器械有限公司
Coordinated Metal And Ceramic Orthodontic Bracket Systems
InactiveUS20120094247A1Great slot floor thicknessPrevent unintentional crackingBracketsDental toolsCeramic bracketsMaterials science
Coordinated metal and ceramic orthodontic bracket systems (100) allow a practitioner to insert one or more ceramic brackets (102, 104, 106, 108) into a metal bracket system (1001), replacing selected metal brackets (102′, 1041, 106′, 108′) with ceramic brackets (102, 104, 106, 108), and vice-versa. Thus, both a ceramic bracket system (100) and a metal bracket system (1001) are provided, in which corresponding brackets of each system include substantially identical “in-out” slot floor cross-sectional thicknesses so that corresponding brackets are interchangeable with each other, without any need for compensating bends or later treatment to correct unintended buccal-lingual tooth movement.
Owner:ULTRADENT PROD INC
Polishing grinding machine for LED ceramic bracket
InactiveCN104802063AGuaranteed grinding qualityImprove automationBelt grinding machinesAutomatic grinding controlContact pressureDrive wheel
The invention discloses a polishing grinding machine for an LED ceramic bracket. The polishing grinding machine comprises a rack, a workpiece conveying device, a polishing grinding device and a PLC controller. The workpiece conveying device comprises a conveying belt, a conveying roll shaft and a motor. A locating roll shaft is arranged above the conveying belt. The polishing grinding device comprises a vertical pedestal, a drive wheel, a driven wheel, and an abrasive belt. The conveying belt is provided with a pressure sensor. The driven wheel is provided with a lifting drive structure. Moreover, the abrasive belt is provided with an offset sensing switch for sensing a positional deviation of the abrasive belt and a correcting mechanism for pushing and correcting an abrasive belt winding position. The PLC controller is respectively connected with the motor, the pressure sensor, the lifting drive mechanism, the offset sensing switch and the correcting mechanism. The automation degree and the intelligent degree of the polishing grinding machine are increased greatly by automatically sensing a contact pressure between the abrasive belt and a workpiece, automatically sensing the winding position of the abrasive belt, and automatically regulating the contact pressure and the winding position in real time based on the actual conditions, accordingly increasing the machining efficiency and guaranteeing the polishing grinding quality better.
Owner:DONGGUAN KECHENDA ELECTRONICS TECH
High-power LED (Light Emitting Diode) bracket and high-power LED packaging structure
InactiveCN102820409AIncrease productivityImprove heat resistanceSolid-state devicesSemiconductor devicesCeramic bracketsUltraviolet lights
The invention discloses a high-power LED (Light Emitting Diode) bracket which comprises a conductive pin and a base wrapping the conductive pin. A cavity is formed at the top of the base. A heat sink is fixedly arranged at the bottom of the cavity. The base is made of a high temperature resistant material. The high temperature resistant material is mainly a liquid crystal high-molecular polymer and contains a plurality of filler particles. The high-power LED bracket provided by the invention has the advantages of high heat resistance, high light emitting efficiency, high ultraviolet light shielding performance and low cost. Compared with the PPA (Phenyl-Propanolamine) bracket currently used, the high-power LED bracket provided by the invention has higher heat resistance so that the bracket has good compatibility with a gold and tin eutectic solder which welds the LED onto the base, and therefore, the production efficiency of an LED lamp is improved. Compared with the ceramic bracket currently used, the bracket disclosed by the invention has the advantage that high-efficiency and low-cost production can be realized by an injection molding method. In addition, the invention further discloses a high-power LED packaging structure using the bracket.
Owner:SHENZHEN GLORY SKY OPTOELECTRONICS CO LTD
Friction experiment table for initiatively regulating and controlling thickness of lubricating film between friction pair
The invention relates to a friction experiment table for initiatively regulating and controlling the thickness of a lubricating film between a friction pair, belonging to the technical field of mechanical friction. In the experiment table, a glass disc is fixed at the upper end part of a rotating shaft by a fixing screw and is connected with the rotating shaft; a hinge is arranged on a lubricating experiment table and a lever penetrates through the hinge; an oil cup is arranged at one end of the lever and a weight is hung at the other end of the lever; a steel ball is arranged between the upper surface of the oil cup and the lower surface of the lubricating experiment table; the lower part of a piezoelectric ceramic rod is fixed on a piezoelectric ceramic bracket by fastening screws; a fine tuning spiral rod is arranged at the lower part of the piezoelectric ceramic bracket; and the lower end part of the piezoelectric ceramic rod is connected with a piezoelectric ceramic controller by a signal wire. According to the friction experiment table, the gap between the steel ball and a glass disc point contact pair can be roughly adjusted; and the displacement generated by piezoelectric ceramic is further reduced at the near end of the lever by a lever principle, so that the gap between the ball and the disc point contact pair is accurately controlled.
Owner:TSINGHUA UNIV
Computer-aided design (CAD) and computer-aided manufacturing (CAM) personalized substrate sandwich ceramic bracket and manufacturing method thereof
The invention discloses a CAD and CAM personalized substrate sandwich ceramic bracket, which can increase the fit between the ceramic bracket as well as a tongue side bracket and the dental face, so the binding strength of the bracket and the dental face is increased. The CAD and CAM personalized substrate sandwich ceramic bracket consists of a personalized bracket base (1) which is matched with a finished ceramic bracket and completely jointed with the lip face or tongue face of a tooth body and the bottom face of the finished ceramic bracket, a binder (2) and the finished ceramic bracket (3), wherein the thickness of the substrate is 0.4 to 0.6 centimeters; the ceramic binder (2) binds the personalized bracket base (1) and the finished ceramic bracket (3) into a whole; and the thickness of the ceramic binder (2) is kept between 30 and 50 micrometers.
Owner:NANJING SANWEI TECH
Ceramic bracket semi-finished product finish machining and polishing tool
InactiveCN111482888AAvoid breakingTo achieve a tiling effectGrinding carriagesPolishing machinesPolishingCeramic brackets
The invention discloses a ceramic bracket semi-finished product finish machining and polishing tool. The ceramic bracket semi-finished product finish machining and polishing tool comprises a box body,a working cavity with a forward opening is formed in the box body, a tray body and a supporting body are arranged in the working cavity, the supporting body is located on the upper side of the tray body, a power mechanism capable of controlling the tray body to vibrate to tile brackets and control polishing of the brackets is arranged in the working cavity, the power mechanism comprises two inserting cylinders which are fixedly arranged on the bottom surface of the tray body in a left-right symmetry mode, and two fixing blocks which are symmetrical left and right are fixedly arranged on the bottom wall of the working cavity. According to the ceramic bracket semi-finished product finish machining and polishing tool, the tray body is driven to vibrate in a rotary touch mode and through shaking of springs, then the brackets poured into a containing cavity can achieve the tiling effect, the contact areas between the brackets and polishing cotton when the brackets are polished are greatlyincreased, and the problem that the brackets are stacked and consequently polishing is damaged is solved.
Owner:上海新塔星石材发展有限公司
Preparation method of orthodontic zirconia bracket
PendingCN113185283AImprove the problem of weak bondingIncreased Design FreedomBracketsAdditive manufacturing apparatusComputer printingCeramic brackets
The invention discloses a preparation method of an orthodontic zirconia bracket. The method is characterized in that zirconia ink slurry with the solid phase content of 30-60% is used as a raw material, dentition data of a patient is acquired to establish a digital model, a bracket structure with a T-shaped net bottom structure is set, STL data is exported, and the zirconia ceramic bracket consistent with the design is processed through a 3D printer. The bonding force with the tooth surface is greatly improved, and the problem that the ceramic bracket is easy to fall off is effectively solved; the treatment effect and the wearing comfort of a patient are improved; in a limited space, various structures which are difficult to realize by mold opening can be realized, and the product design upgrading is promoted; when the bracket and the net body structure are integrally formed, the high-precision processing characteristic can be further ensured, so that the production process is simplified, and the production difficulty is reduced; and one-time forming is achieved, operation is easy, the defects that in a traditional process, mold opening cost is high, and the mold changing period is long are overcome, and product iteration upgrading is accelerated.
Owner:杭州普太科技有限公司
Method for removing falling orthodontic bracket baseplate binding agent by means of ultrashort pulse laser scanning
InactiveCN104028896AQuick and effective removalCosmetic damageLaser beam welding apparatusCleaning processes and apparatusControl systemMonitoring system
The invention discloses a method for removing a falling orthodontic bracket baseplate binding agent by means of ultrashort pulse laser scanning. A device which is used in the method comprises an ultrashort pulse laser device with visible indicating light, a round polarizing mirror system, a galvanometer scanning system, an orthodontic bracket clamp, a realtime monitoring system with a filtering unit, and a control system unit. Scan removing of he binding agent left on an orthodontic bracket baseplate is completed by using the ultrashort pulse laser device under different process parameters through the galvanometer scanning system. Attractiveness of a ceramic bracket is not damaged by utilizing cold ablative removing, on a material, of ultrashort pulse laser, so that the method has extremely high clinic application value. The whole method is simple and convenient, no any extra process is not needed, time for removing a single binding agent left on the orthodontic bracket baseplate is about one minute at the soonest, and the method is safe, environment friendly and efficient. Due to an unstressed binding agent removing mode, completeness of a whole orthodontic bracket substrate and a baseplate fixing structure is guaranteed.
Owner:BEIJING UNIV OF TECH +1
Manufacturing method of ceramic bracket for magnetic suspension variable frequency centrifuge coil
The invention relates to a manufacturing method of a ceramic bracket for a magnetic suspension variable frequency centrifuge coil. The method includes the steps of: 1. stirring aluminium oxide, calcium oxide, niobium pentoxide, calcium carbonate and suzhou clay powder evenly according to a predetermined proportion, and conducting drying in a drying oven to a water content of less than or equal to 0.03%; 2. putting the uniformly mixed mixed powder into a ball mill to carry out ball milling to a particle size measurement value of 2.0-4.0micrometers; 3. adding white wax accounting for 8-13% of the mixed powder weight and yellow wax accounting for 0.2-0.6% of the mixed powder weight into the ball milled mixed powder to make a wax cake; 4. using a hardware mould to process the wax cake into a ceramic bracket green body for the magnetic suspension variable frequency centrifuge coil by means of hot press molding; 5. fixing the ceramic bracket green body in a sagger with adsorption powder and sending the green body into a wax removal kilin to remove wax; and 6. loading the wax removed and ash removed ceramic bracket green body into a corundum earthen bowl tidily and sending the corundum earthen bowl into a continuous sintering kiln to conduct high temperature sintering, and finally performing natural cooling, thus obtaining the ceramic bracket for the magnetic suspension variable frequency centrifuge coil.
Owner:新化县恒睿电子陶瓷科技有限公司
Biodegradation performance and strength controllable biological composite ceramic bracket and preparation method thereof
ActiveCN110668807AEven by forceImprove stabilityAdditive manufacturing apparatusComposite ceramicCeramic brackets
The invention belongs to the field of biomedical materials and additive manufacturing, and relates to a biological composite ceramic bracket with controllable degradation performance and strength anda preparation method thereof. The method comprises the following steps: S1, taking hydroxyapatite powder, beta-calcium phosphate powder and micron-sized biological glass powder, wherein the total massis m; mixing different photocurable resin monomers and / or prepolymers thereof in a predetermined ratio, adding a plasticizer and a dispersant, ultrasonically mixing, adding a photoinitiator, a polymerization inhibitor, a release agent and a lubricant, and fully mixing to obtain a solvent; s2, adding the three powders into a solvent in stages, stirring, and performing vacuum ball milling to obtainprinting slurry; s3, performing DLP 3D printing and / or photocuring by using printing slurry to obtain a bioceramic biscuit; and S4, degreasing and sintering the bioceramic biscuit to obtain a finished product of the biocomposite ceramic bracket. The method can obtain composite bioceramics with excellent mechanical properties and degradation properties, and the composite bioceramics can be appliedto bone tissue engineering technology.
Owner:HUAZHONG UNIV OF SCI & TECH
Chip-on-board (COB) light source of flip chip mining lamp
The embodiment of the invention discloses a chip-on-board (COB) light source of a flip chip mining lamp. The COB light source of the flip chip mining lamp comprises a cooling copper substrate, an aluminum nitride ceramic bracket and an optical glass lens, wherein the cooling copper substrate comprises a sink table structure, a through hole structure and a copper foil line; the aluminum nitride ceramic bracket comprises a bracket body which is made of aluminum nitride ceramic; a plurality of solid crystal regions are evenly arranged on one surface of the bracket body; and the optical glass lens is adhered right above a chip packaging block on the cooling copper substrate, so that the problem in a light-emitting diode (LED) light source produced by a flip chip technology is avoided; crystal fixing is realized by welding; a bonding wire is not needed; and a eutectic bracket is connected with a cooling substrate in a reflow soldering manner, so that the anti-vibration stability is very good.
Owner:深圳市格天光电有限公司
Vehicle lamp light source device and vehicle lamp module
PendingCN109904300AChange horizonsIncrease viewing distanceVehicle headlampsSolid-state devicesCeramic bracketsEngineering
The invention provides a vehicle lamp light source device and a vehicle lamp module. The vehicle lamp light source device comprises one or a plurality of light-emitting wafers and a base for mountingthe wafers; the wafers are packaged on the base by a fluorescent powder silica gel layer; the wafers are NUV (Near Ultraviolet) gallium nitride LED (Light-Emitting Diode) wafers with a light-emittingwavelength range of 380nm to 420nm, and light finally output to the outside is near natural light; the base is a substrate of a PLCC / ceramic bracket or COB integrated light source; and the wafers forma single connection, parallel connection, serial connection or series-parallel connection mounting mode on the base. According to the invention, by using NUV gallium nitride LEDs as light sources, problems of NUV loss and color distortion which are caused by adoption of an LED blue light wafer in the prior art are solved; and by a proportion of the fluorescent powder silica gel layer, the light finally output to the outside becomes the near natural light similar with the sunlight, so that the field of vision of a driver is greatly changed, and a safe viewing distance is improved. Moreover, the near natural light does not contain strong blue white light which can instantaneously make people blind, and thus, the vehicle lamp light source device has a higher safety coefficient than a HID (High intensity Discharge) head lamp.
Owner:索罗紫光(上海)科技有限公司
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