3results about How to "Improve material properties" patented technology

This invention discloses a material structure and epitaxial method for a gallium nitride Schottky diode, comprising, in the epitaxial order: a substrate; an aluminum nitride (AlN) nucleation layer; a lower aluminum gallium nitride (AlGaN) stress modulation layer; an unintentionally doped (Uid) GaN buffer layer; and an upper AlGaN stress modulation layer; n + -Heavy GaN layer; n ++ -GaN ohmic highly doped layer; n-GaN transition layer; n ‑ -GaN lightly doped layer. Based on the metal-organic chemical vapor deposition (MOCVD) method, a stress modulation layer of AlGaN underlayer is introduced at the interface between the AlN nucleation layer and the UidGaN buffer layer to reduce thermal mismatch stress; and a stress modulation layer of AlGaN underlayer is introduced at the interface between the UidGaN buffer layer and the n + - The GaN heavily doped layer interface introduces a stress modulation layer on top of AlGaN to reduce lattice mismatch stress; in n ++ -GaN ohmic highly doped layer and n ‑ An n-GaN transition layer is introduced between the lightly doped GaN layers, and n ‑ - The GaN lightly doped layer is produced using a high-temperature, low-growth-rate process to improve n ‑ - Quality and electronic transport properties of lightly doped GaN layers. The GaN SBD epitaxial material achieved by this method has high quality, low stress, and low sheet resistance, which is beneficial to improving the performance of GaN SBD devices.

The application relates to the technical field of high polymer materials, in particular to a hyaluronic acid-collagen composite gel for facial filling and a preparation method thereof, which is physically mixed from a collagen solution and a hyaluronic acid solution, wherein the volume of the hyaluronic acid solution is three times that of the collagen solution, the concentration of the hyaluronic acid solution is mixed from sodium hyaluronate and a composite buffer, the collagen solution is mixed from bovine collagen and the composite buffer, the molecular weight of the bovine collagen is 300-400 kDa, and the composite buffer contains lidocaine hydrochloride and a phosphate. The hyaluronic acid-collagen composite gel for facial filling and the preparation method thereof improve the material properties of collagen, enhance the anti-deformation ability and viscosity of the material, make the material better fit the facial profile and dynamic changes, reduce the deformation and displacement risk after injection, and help to improve the facial appearance and skin state and promote the repair and regeneration of the skin.

The utility model provides a carbon product sintering system which comprises a carbon product sintering furnace which comprises a furnace body used for containing one or more to-be-sintered green bodies, and the peripheries of the green bodies are filled with resistance materials; the one or more thermocouples are suitable for being arranged in the resistance material, and the thermocouples are suitable for feeding back temperature signals from the furnace body; the power supply is suitable for supplying power to the carbon product sintering furnace according to the electrical output parameters, so that the resistance material is heated to sinter the green body; and the power supply control equipment is suitable for receiving the temperature signal when the carbon product sintering furnace works. The carbon product sintering system can greatly improve the yield of the carbon products on the basis of reducing the cost.