5results about How to "Microporous reduction" patented technology

The invention discloses a bimorphic and fully-compact tungsten-copper alloy electronic packaging heat sink material and a preparation method thereof, relates to the technical field of alloy material preparation, and aims to solve the problem that the performance of a material prepared in the prior art is difficult to meet application requirements. The preparation method comprises the following steps that polyhedral tungsten powder and spherical tungsten powder are subjected to ball milling and mixing treatment, and bimorphic tungsten powder is obtained; the mass ratio of the polyhedral tungsten powder to the spherical tungsten powder is (80-95): (20-5); the bimorphic tungsten powder and copper powder are mixed in the nitrogen or argon protective atmosphere, and bimorphic tungsten-copper mixed powder is obtained; the mass ratio of the bimorphic tungsten powder to the copper powder is (7: 3)-(9: 1); the tungsten-copper mixed powder is subjected to hot isostatic pressing treatment after being subjected to sheathing treatment and degassing treatment, and the tungsten-copper alloy is obtained; and carrying out sheath removal treatment and machining treatment on the tungsten-copper alloy to obtain the tungsten-copper alloy electronic packaging heat sink material.

The invention discloses a zirconia ceramic matrix with high thermal shock resistance as well as a preparation method and application thereof. The zirconia ceramic matrix comprises a matrix and a coating layer a; the matrix comprises the following components: 90-98 wt% of zirconium oxide; 1.5 to 8 wt.% of a stabilizing agent; % of a grain boundary regulating agent; the stabilizing agent is prepared from the following components in percentage by weight: 2.0 to 4.0 percent of Sc2O3, 0.5 to 1.5 percent of Yb2O3 and 0.3 to 1.0 percent of Er2O3; the grain boundary regulating agent is a composition of a boron source and an aluminum source; in the coating layer a, the molar ratio of zirconium to aluminum is (2-3): 1; and the component 1 is polyvinyl alcohol or polyvinylpyrrolidone. The fracture toughness, bending strength and thermal shock resistance of the ceramic matrix are effectively improved, and the overall mechanical property is remarkably improved. When the material bears thermal shock, the thermal shock resistance of the material is improved, and the application scene of the zirconia ceramic material is expanded.

The outer cover comprises a mattress body, an upper outer cover body and a lower outer cover body, the outer diameter surface of the mattress body is wrapped with the upper outer cover body and the lower outer cover body, and the edge of the concave side of the upper outer cover body and the edge of the concave side of the lower outer cover body are provided with a male buckle and a female buckle respectively. The upper outer cover is composed of two groups of polylactic acid fiber layers, a bamboo fiber layer and a graphene fiber layer, the graphene fiber layer is arranged between the two groups of polylactic acid fiber layers, empty grooves are formed in the polylactic acid fiber layers, and anti-mite antibacterial textile functional auxiliaries are arranged in the empty grooves. According to the outer cover, the whole mattress body is surrounded by the upper outer cover and the lower outer cover to protect the mattress body, and the graphene fiber layer is woven by using a high-density three-dimensional weaving method, so that micropores in the fabric are reduced, mites are prevented from entering the interior of the bedding, and the comfort of the mattress is improved. The polylactic acid fiber layer, the bamboo fiber layer and the anti-mite and anti-bacterial textile functional auxiliary agent are used for resisting bacteria and preventing mites, and comfort and breathability of the outer cover are ensured.

The invention belongs to the technical field of high polymer materials, and discloses a lightweight hard packaging material for a wine tray. Comprising the following raw materials in parts by weight: 80-85 parts of PET, 3-5 parts of hollow glass beads, 3-5 parts of thermoplastic polyurethane, 2-3 parts of zinc oxide, 0.8-1.2 parts of a composite nucleating agent, 0.5-1 part of fumed silica, 0.5-0.8 part of a chain extension modifier, 0.3-0.4 part of a foaming agent, 0.2-0.5 part of pearl powder, 0.2-0.3 part of a lubricant and 0.2-0.3 part of an antioxidant. According to the invention, the thermoplastic polyurethane, the composite nucleating agent and the chain extension modifier are blended in the PET material to improve the crystallization temperature and the melt strength and toughness, and during foaming, cell nucleation and growth are easily and stably controlled, so that micro-foaming cells of the material are recrystallized after being formed, and the micro-foaming stability is improved; during forming, a positive and negative pressure plastic suction machine is used for plastic suction forming, excessive collapse of foam holes during softening and plastic suction of the micro-foaming thick sheet is avoided, and the micro-foaming holes are well reserved, so that the obtained wine tray has a good buffering and protecting effect. The method has the advantages of continuous, stable and large-scale production.

The present invention belongs to the technical field of polishing materials. More specifically, it relates to a polyurethane polishing material and a preparation method thereof. The product provided by the present invention includes a thermoplastic polyurethane resin, a nano-additive; the nano-additive includes nano-cerium oxide and nano-graphene oxide; wherein the nano-graphene oxide includes stacked graphene sheets, and the nano-cerium oxide is at least partially dispersed between the graphene sheets; and at least part of the nano-cerium oxide is directly dispersed in the thermoplastic polyurethane resin; the mass ratio of the nano-cerium oxide to the nano-graphene oxide is 1:1.8-1:2.2; in the thermoplastic polyurethane resin, the amount of the nano-additive is 10-12.5% ​​of the mass of the thermoplastic polyurethane resin. Sodium dodecylbenzene sulfonate is also included between the graphene sheets; the ratio of the D50 of the nano-cerium oxide to the nano-graphene oxide is 1:8-1:10; and the D50 of the nano-cerium oxide is 10-15nm.