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827results about How to "Good light transmission" patented technology

Osseointegrative surgical implant

Embodiments of the present invention provide an osseointegrative implant and related tools, components and fabrication techniques for surgical bone fixation and dental restoration purposes. In one embodiment an all-ceramic single-stage threaded or press-fit implant is provided having finely detailed surface features formed by ceramic injection molding and/or spark plasma sintering of a powder compact or green body comprising finely powdered zirconia. In another embodiment a two-stage threaded implant is provided having an exterior shell or body formed substantially entirely of ceramic and/or CNT-reinforced ceramic composite material. The implant may include one or more frictionally anisotropic bone-engaging surfaces. In another embodiment a densely sintered ceramic implant is provided wherein, prior to sintering, the porous debound green body is exposed to ions and/or particles of silver, gold, titanium, zirconia, YSZ, α-tricalcium phosphate, hydroxyapatite, carbon, carbon nanotubes, and/or other particles which remain lodged in the implant surface after sintering. Optionally, at least the supragingival portions of an all-ceramic implant are configured to have high translucence in the visible light range. Optionally, at least the bone-engaging portions of an all-ceramic implant are coated with a fused layer of titanium oxide.

Preparation method of aesthetic all-zirconia restoration body

InactiveCN102579148ASmall coloring processGood aesthetic effectArtificial teethTooth PreparationsDigital mockup
The invention relates to a preparation method of an aesthetic all-zirconia restoration body. The process comprises the steps of: clinically making an impression and a model after tooth preparation, collecting the digital impression, establishing a digital model, designing the shape of the restoration body by being assisted with a computer, cutting into the shape of the restoration body by a digital control lathe, try-wearing on the model, adjusting the outline form, polishing, coloring, glazing, and completing the fabrication of final restoration body. The restoration body is colored by using a coloring zirconia porcelain piece; the coloring process is influenced little by personal factors; an all-zirconium-crown cutting end transparent handling liquid is used to handle the presintered tooth crown, so that the color and the transparence of the zirconia all-porcelain tooth change gradually, so that an ideal aesthetic effect is achieved. The preparation process is free of porcelain coating. The method has no porcelain fracture danger, and the operation is simple. The prepared tooth is few, so 1mm of preparation space is enough to use. The zirconia all-porcelain tooth has excellent biocompatibility, high strength, good transparence and glossiness, and natural and lifelike colors. CAD/CAM (Computer-Aided Design/computer-aided manufacturing) is used for designing and completing the processing, thereby ensuring the marginal adaption and precision of the zirconia all-crown porcelain tooth.

Optical transparent frequency selecting surface structure and manufacturing method

ActiveCN104950365ASevere volume shrinkage does not occurIncreased crack widthDiffraction gratingsWaveguide type devicesLine widthTransmittance
The invention provides an optical transparent frequency selecting surface structure and a manufacturing method, and belongs to the technical field of optical windows. The frequency selecting surface structure comprises a substrate and transparent mesh films which are distributed on the surface of the substrate and are provided with periodic hole arrays. The manufacturing method comprises the following steps of coating the upper surface of the substrate by using mask liquid; naturally drying the mask liquid to form a crack template under specific conditions; depositing a conductive metal layer on the surface of the crack template; removing the crack template to obtain the continuous transparent mesh films; manufacturing hole array mask structures or complementary structures thereof on the transparent mesh films; removing the transparent mesh films which are not wrapped by the mask structures; and removing the mask structures to obtain the optical transparent frequency selecting surface structure. By the optical transparent frequency selecting surface structure, the problem that the light transmittance performance of an optical window is reduced due to increasing of a metal line width is solved, the circumstance that the light transmittance performance and the electromagnetic shielding performance of the optical window are reduced simultaneously in the traditional mechanical friction mode is avoided, and specific processing conditions for solving the problem of non-uniform distribution of high-order diffraction energy are given.

Novel SINP silicone blue-violet battery and preparation method thereof

he invention relates to a novel SINP silicone blue-violet battery and a preparation method thereof. The invention uses shallow junctions formed from thermally diffused phosphorus, an ultra-thin SiO2 layer formed by low-temperature thermal oxidization and an ITO dereflection/collection electrode film formed by RF magnetron sputtering to prepares a novel ITO/SiO2/np blue-violet reinforced SINP silicone photo-battery. Preparation method of the invention is to take a silicon single crystal flake which is P type, and has crystallographic orientation of 100, electric resistivity of 2 and thickness of 220mu m, as a substrate. The substrate is cleaned and is etched by routine chemistry, and then is thermally diffused by POC3 liquid source to form n regions (the invention prepares two pieces of novel SINP photo-batteries, one being routine SINP photo-battery having emitting region square resistance of 10 Omega/square and junction depth of 1 Mu m, and the other one being SINP silicone blue-violet battery having emitting region square resistance of 37 Omega/square and junction depth of 0.4 Mu m). Removing the phosphorosilicate glass (HF:H2O=1:10) at front face; steaming Al at back of the silicon chip; thermally oxidizing the silicon chip at 400 to 500 DEG C and condition of V2:O2=4:1 for 15 to 30min to generate a layer of 15 to 20 ultra-thin SiO2 layer, and at the same time alloying the Al at the back. Then RF magnetron sputtering the ITO dereflection/collection electrode film (ITO film is also deposited on the glass to study electrooptical characteristic thereof) having high transmittance and high conductivity, and sputtering a Cu gate electrode by metal mask direct-current magnetron. Finally, cutting the outer edge part of the battery by a diamond excircle downward cutting/a dicing saw so as to prevent short circuit of the edge of the photo-battery.

Preparation method for gamma-AlON transparent ceramic powder

The invention relates to a method for preparing pure-phase gamma-AlON transparent ceramic powder by carbothermal reduction of gamma-Al2O3, and belongs to the field of preparation of transparent ceramic materials. According to the preparation method, nano-alpha-Al2O3 and activated carbon are taken as raw materials; powder is filled in a graphite crucible loosely, wherein an aluminum oxide plate is paved at the bottom of the graphite crucible; an air hole which penetrates through the powder is preformed at the aluminum oxide plate; a graphite cover provided with fine and dense air holes is used for covering the hole; the pure-phase gamma-AlON transparent ceramic powder is prepared by adopting a two-step heating process in a flowing nitrogen environment with a micro positive pressure. By the adoption of the preparation method, the vacuumizing difficulty can be effectively reduced, powder is prevented from scattering in a vacuumizing stage, the time required for discharging adsorbed gas can be greatly shortened, the vacuumizing speed is high, and the preparation efficiency of the gamma-AlON powder is greatly improved; the obtained gamma-AlON powder phase has stable and reliable compositions and can be used for pressure-less sintering preparation of AlON transparent ceramics with high transmittance; the process is simple and is easy to operate, and is suitable for industrial production.
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