4results about How to "Solve the mechanical strength" patented technology

This invention discloses a method for preparing a novel ultra-high voltage high-performance composite insulating material, belonging to the field of composite insulating material preparation technology. The technical solution includes the following steps: S1, preparing a modified epoxy-silicone rubber composite resin matrix: 40-50 parts by weight of bisphenol A type epoxy resin (E-51) are placed in a reaction vessel, heated to 60-70℃, and continuously stirred at a stirring rate of 300-500 r / min. 10-15 parts by weight of terminal hydroxyl polysiloxane (molecular weight 5000-10000) are added, and the temperature is kept constant for 1.5-2 hours; subsequently, the system temperature is lowered to 40-50℃. The beneficial effects of this invention are: by setting up a resin matrix system of "terminated hydroxyl polysiloxane modified epoxy resin + nano-alumina / boron nitride composite reinforcement," the problem of imbalance between high voltage resistance and aging resistance in existing materials is solved. It exhibits significantly improved dielectric strength, greatly reduced dielectric loss, and excellent high and low temperature cycling performance, meeting the long-life operation requirements of ultra-high voltage equipment.

The utility model belongs to the field of power cables, and particularly relates to a high-tensile multi-layer stranded power cable, which comprises an inner-layer conductor. The surface of the inner-layer conductor is sleeved with an outer-layer stranded layer, the surface of the outer-layer stranded layer is sleeved with an interlayer buffer layer, the surface of the interlayer buffer layer is provided with a reinforced braid layer, and the surface of the reinforced braid layer is sleeved with a sheath layer; the inner-layer conductor is formed by twisting metal wires, the outer-layer twisting layer is formed by spirally winding metal wires on the outer surface of the inner-layer conductor, the twisting direction of the outer-layer twisting layer is opposite to that of the inner-layer conductor, the interlayer buffer layer covers the surface of the outer-layer twisting layer, and the sheath layer covers the interlayer buffer layer; through the collaborative structural design of the inner-layer conductor, the outer-layer stranded layer, the interlayer buffer layer, the reinforced braid layer and the sheath layer, the comprehensive improvement of the tensile strength, the bending fatigue life and the lightweight level of the cable is realized, the problems of poor mechanical strength and dynamic adaptability are solved, and the economical efficiency and the engineering applicability of the cable are improved.

The invention belongs to the field of hydrogen storage materials, and provides a hydride hydrogen storage material and a preparation method thereof. According to the preparation method, a block material is prepared through discharge plasma sintering forming by adopting a multi-level collaborative design of a reactive composite hydride phase formed by magnesium hydride and lithium borohydride, an ordered mesoporous carbon and hexagonal boron nitride composite carrier structure, an atomic layer deposition oxide coating layer, a niobium pentoxide and titanium hydride catalyst and a heat-conducting outer coating; the comprehensive performance that the reversible hydrogen storage mass fraction is 5.5-7.0 wt%, the capacity retention ratio after 50 times of circulation is larger than or equal to 90%, and the temperature gradient in the block is smaller than or equal to 10 DEG C / cm is achieved, and the multiple contradictions between the high hydrogen storage capacity and the block mechanical strength, between the oxide coating layer stability and the hydrogen diffusion rate and between the heat conduction uniformity and the structural integrity are solved. The method has a wide application value in a solid hydrogen storage system.

This invention discloses a method for preparing a corrosion-resistant, anti-icing, and wear-resistant superhydrophobic coating and the resulting product. The method uses graphite micropowder, alumina micropowder, ceramic fiber, nano-alumina powder, and methyl silicone resin as main raw materials, and ethanol as a dispersant. The materials are mixed according to a specific mass ratio to obtain a coating, which is then applied by spraying or dip coating and followed by heat treatment to form a superhydrophobic coating on different substrate surfaces. The product with the superhydrophobic coating exhibits excellent surface corrosion resistance, anti-icing, and wear resistance. The preparation method has many advantages, including simple process, low cost, environmental friendliness, and superior performance, and has broad application prospects in the field of material surface protection.