66 results about "Ceramic polymer composites" patented technology

The present invention relates to compositions and methods of preparing a three-dimensional matrix of micron sized electrospun fibers, wherein the electrospun fibers are formed from a electrospun composite comprising a bioactive ceramic component and a polymer component. The matrix provides an osteoconductive and osteoinductive scaffold supporting osteogenesis and thereby facilitates bone repair.

The present invention relates to a method of manufacturing a piezoelectric ceramic body and devices therefrom. The method comprises mixing a piezoelectric ceramic powder with a polymer binder and surfactant to form a slip mixture, casting the slip mixture into a mold and setting to the slip mixture in the mold to form a green body, cutting the green body to form a cut green body with an array of micron-sized ceramic elements and separation, and sintering the cut green body to form a sintered ceramic body. The sintered ceramic body can be further process to encasing in a polymer material to form a piezoelectric ceramic-polymer composite. The piezoelectric ceramic-polymer composite can be further processed to form devices such as acoustic transducers and sensors.

The invention relates to a preparation method of a piezoelectric ceramics-polymer composite material. The method is characterized in that ceramic powder, a dispersant and a curing agent system are added are added in water for mixing, a reaction is initiated to prepare the piezoelectric ceramics biscuit with the strength greater than 10 MPa, and processes of cutting and sintering are carried out. The method comprises the following steps: 1) removing water of the ceramic powder, the dispersant, the curing agent system and fully mixing, defoaming, performing a gel reaction on the ceramic slurry under certain temperature and solidifying to obtain the piezoelectric ceramics gel biscuit with strength greater than 10MPa; and 2) cutting the piezoelectric ceramics biscuit from the step 1), sintering, then filling the polymer, solidifying under room temperature and cutting a pedestal to obtain 1-3 or 2-2 piezoelectric ceramics polymer composite material. The method has the advantages of high reliability, simple required equipment, simple operation, and can be used for preparing the ceramic-polymer piezoelectric composite material with large area and less defect crack.

The present invention relates to a device for detecting cancer in human tissue. The device comprises an acoustic array shaped to conform to and surround a portion of the human anatomy and a material for acoustically coupling the acoustic array and the human anatomy portion. The acoustic array is formed from a plurality of doubly curved segments. Each segment is formed by a piezoelectric ceramic polymer composite material with an acoustic element pattern formed on one surface via the selective deposition of a conductive material. The acoustic element pattern contains a plurality of acoustic elements which act as both transmitters and receivers. The acoustic array further includes a backing material which provides a desired mechanical damping to each segment and defines the shape of the array. The device further includes a housing which includes signal conditioning electronics to condition signals received from the acoustic array. A central processing unit is provided to create cross sectional images of the human tissue under examination. A display unit is provided to display the cross sectional images.

The invention relates to a high-dielectric constant metal/ceramic/polymer composite material and a method for producing an embedded capacitor. As ceramic particles having a relatively small size are bound to the surface of metal particles having a relatively large size by mixing, the occurrence of percolation can be prevented without coating the metal particles, and at the same time, the capacitance of an embedded capacitor can be increased. In addition, a process for coating the surface of the metal particles can be omitted, thus contributing to the simplification of the overall preparation procedure.

The invention provides a preparation method of the piezoelectric ceramics polymer composite materials. The method includes: preparing the piezoelectric ceramics polymer composite membrane through curtain coating-hot pressing or dry pressing-hot pressing firstly, conducting the intersecting lamination hot pressing on one layer or multiple layers of composite membranes and polymer silk screen membranes to form the piezoelectric ceramics polymer composite materials; or preparing the piezoelectric ceramics polymer composite materials through hot pressing after the curtain coating is conducted on the piezoelectric composite membrane directly on the polymer silk screen membrane through the curtain coating method. The piezoelectric ceramics polymer composite material with the high ceramic content is simple in technology, low in cost, capable of preparing the piezoelectric composite membrane with the excellent comprehensive performance and large size, applicable to the piezoelectric touchpad, and capable of realizing industrialization.

The invention relates to a piezoelectric ceramic polymer composite material, especially a preparation method of the piezoelectric ceramic polymer composite material. A conductive polymer layer is clamped between two piezoelectric material layers, and the piezoelectric ceramic polymer composite material of the integrated structure is formed via hot pressing. The conductive polymer layer is of a conductive particle polymer composite material, the piezoelectric material layer is of a 0-3 type piezoelectric ceramic polymer composite material, and the conductive polymer layer improves the flexibility of the 0-3 type composite material while having no influence on the piezoelectric performance of the 0-3 type composite material. The piezoelectric ceramic polymer composite material is simple in preparation technology, low in cost and high in comprehensive performance, can be used to prepare large-size piezoelectric composite films, and can be applied to a piezoelectric touch control plate and realize industrial production.

A ceramic polymer composite material is disclosed. The composite material comprises following components by mass: 47-85% of 3Y-ZrO2, 0-8% of polyethylene, 0-8% of polypropylene, 3-15% of paraffin, 0-10% of microcrystalline wax, 0.3-4% of a dispersant, 0-5% of a plasticizer, and 5-25% of graphite particles with the particle size of the graphite particles ranging from 1 [mu]m to 1 mm. The 3Y-ZrO2, the polyethylene, the polypropylene, the paraffin, the microcrystalline wax, the dispersant, the plasticizer and the graphite particles are sintered at a high temperature to obtain a ceramic material with a spongy porous crosslinking structure. The ceramic composite material with light weight and good toughness is formed by injecting the ceramic material with the spongy porous crosslinking structure into a polymer resin material. A preparing method of the ceramic polymer composite material is also disclosed.

Provided are a thermally conductive ceramic-polymer composite in which thermoplastic polymers form a matrix, and planar fragments of thermally conductive ceramic or thermally conductive ceramic powder is uniformly dispersed on a grain boundary between thermoplastic polymer particles, thereby forming a thermal pathway, wherein the thermoplastic polymer particles are formed in a faceted shape, and the average size of the planar fragments of thermally conductive ceramic or thermally conductive ceramic powder is smaller than 1/10 of that of the thermoplastic polymer particles, and a method of preparing the same. Accordingly, since dispersion and interfacial affinity of a thermally conductive ceramic filler are maximized, excellent electrical insulation and excellent thermal conductivity can be exhibited even with a small content of the thermally conductive ceramic filler.

A method for manufacturing a microwave substrate is disclosed. In particular, the method of the present invention uses the sol-gel process to form a ceramic-polymer composite microwave substrate. First, an alkoxy silane, water, a catalyst, an alcohol, and a polymer are mixed to form a sol-gel mixture. Next, the water and alcohol in the sol-gel mixture are removed by exerting a pressure. Finally, the sol-gel mixture is sintered to form a microwave substrate.

Disclosed herein is a resin composition for embedded capacitors having excellent adhesive strength, heat resistance and flame retardancy, a ceramic/polymer composite for embedded capacitors including the resin composition, a dielectric layer of a capacitor manufactured therefrom, and a printed circuit board. The resin composition for dielectric layers of embedded capacitors includes a resin selected from the group consisting of bisphenol-A epoxy resins, bisphenol-F epoxy resins and combinations thereof, a brominated epoxy resin containing 40 wt % or more bromine, and a resin selected from the group consisting of bisphenol-A novolac epoxy resins, multi-functional epoxy resins, polyimides, cyanate esters and combinations thereof, and exhibits excellent peel strength, Tg and/or flame retardancy. Further, a ceramic/polymer composite formed by adding a ceramic filler to the resin composition is provided. Furthermore, a dielectric layer formed of the ceramic/polymer composite and a printed circuit board including the dielectric layer are provided. According to the current invention, the ceramic/polymer composite for embedded capacitors, which realizes all of peel strength, Tg and flame retardancy, can be obtained.

Described herein are cold-sintered ceramic polymer composites and processes for making them from inorganic compound starting materials and polymers. The cold sintering process and wide variety of polymers permit the incorporation of diverse polymeric materials into the ceramic.

The invention provides a composite electrolyte material with an electrochemical buffer layer, a preparation method of the composite electrolyte material and a lithium metal battery. The composite electrolyte material with the electrochemical buffer layer comprises a three-layer structure, and the two sides of the ceramic polymer composite electrolyte are respectively provided with a specific positive electrode electrochemical buffer layer and a negative electrode electrochemical buffer layer, so that the interface contact between the ceramic polymer composite electrolyte material and an electrode can be effectively improved; the charge transfer impedance is reduced; meanwhile, the buffer layers on the two sides can also improve the tolerance to high and low pressure, play an electrochemical buffer role, stabilize an electrode/electrolyte interface, generate better chemical stability and reach a wider electrochemical window.

The invention provides a ceramic polymer composite material, which takes inverse opal structure ceramic as a main body, the inverse opal structure ceramic is provided with air holes, a zirconium oxide seed crystal layer is formed in the air holes, zirconium oxide nanowires are formed on the zirconium oxide seed crystal layer, and gaps among the zirconium oxide nanowires are filled with an organic polymer material. The thickness of the zirconium oxide seed crystal layer is 5-10 nm, and the length-diameter ratio of the zirconium oxide nanowire is 8-12. The invention also provides a method for preparing the ceramic polymer composite material. The method comprises the following steps: S1, providing a main body structure; S2, forming a zirconium oxide seed crystal layer; S3, forming a zirconium oxide nanowire; and S4, loading an organic polymer material. According to the ceramic polymer composite material and the preparation method thereof provided by the invention, the inverse opal structure is more tightly combined with organic matters, the comprehensive performance is excellent, the ceramic polymer composite material is not easy to damage under the action of external force, and the service life of ceramic is effectively prolonged.

The invention provides a method for improving the mechanical property of a ceramic polymer composite material, and the method comprises the following steps: carrying out plasticizing molding on corundum-type alumina particles and PPS engineering resin to obtain a composite material blank, and carrying out heat treatment to obtain the ceramic polymer composite material. The invention provides a material heat treatment method which is used for carrying out heat treatment on a high-strength ceramic polymer composite material containing ultrahigh-proportion ceramic powder and aims at eliminating static friction force and static pressure stored in the material forming process. The material has the advantages of ceramic and high polymer materials, has the characteristics of good mechanical strength, high thermal conductivity, good high temperature resistance, excellent processability and the like, and is very suitable for being applied to power PCBs (Printed Circuit Boards).

The invention relates to the field of processing of piezoelectric ceramic polymer composite materials, in particular to processing equipment for a piezoelectric ceramic polymer composite material. Theprocessing equipment comprises a servo motor, a rack, a central shaft, a friction transmission disc, variable speed linkage parts, grinding parts, a bearing disc and a joint part. The servo motor isfixed to the rack through a motor base. The servo motor is in transmission connection with one end of the central shaft. The center shaft is rotationally connected to the rack. The friction transmission disc is fixedly connected to the central shaft. The friction transmission disc is in transmission connection with the three variable speed linkage parts. The three variable speed linkage parts areuniformly fixed to the rack in a surrounding manner. The three variable speed linkage parts each are in transmission connection with one grinding part. The three polishing parts are correspondingly fixed to the three variable speed linkage parts. The other end of the central shaft is fixedly connected with the bearing disc. The joint part is fixed to the middle of the bearing disc. By the adoptionof the processing equipment, a circular ring blank processed by the piezoelectric ceramic polymer composite material can be uniformly ground, and the grinding effect is good.

The invention relates to the technical field of ceramic polymer composite preparation, in particular to a novel ceramic polymer composite raw material formula and a preparation technology. The novel ceramic polymer composite raw material formula and the preparation technology achieve the technical purposes that the composite is high in strength, low in shrinkage and not likely to crack. The novel ceramic polymer composite is prepared from, by weight, 100-120 parts of aluminum oxide powder, 20-25 parts of hydrated magnesium silicate ultrafine powder, 10-15 parts of calcium carbonate powder and the like. The preparation technology comprises six steps. The surface smoothness of prepared ceramic is higher, the surface glossiness is better, the surface finishing degree of the ceramic is obviously improved, and due to addition of the titanium nitride powder, high temperature resistance, corrosion resistance, wear resistance and thermal shock resistance and other excellent properties of the ceramic can be improved.

The invention discloses a ceramic polymer composite pipe production process, and relates to the technical field of pipe fitting production. The ceramic polymer composite pipe production process comprises the following production processes of S1, coating or stringing wear-resistant ceramic patches or pipe fittings on a winding machine; S2, filling gaps between the ceramic patches or the pipe fittings are filled with a resin adhesive; and S3, soaking glass fiber cloth subjected to surface treatment in epoxy resin glue through a glue dipping tank for gluing, enabling the glue content of the adhesive plaster to be 35-45%, and winding 10-20 layers of adhesive plaster outside the wear-resistant ceramic patches or pipe fittings. According to the ceramic polymer composite pipe production process,a high polymer material is combined with wear-resistant ceramic to be cured into a composite component under specific conditions, and the metal high polymer material is combined with the ceramic, so that the strength is high, wear resistance and corrosion resistance are high, a metal pipeline can be replaced, the service life is long, and the ceramic polymer composite pipe production process is widely applied to industrial deslagging and exhaust pipeline systems such as metallurgy, mines, electric industry and chemical engineering.