8 results about "Interconnected porosity" patented technology

This invention relates to the field of ecological building materials technology, and discloses a biodegradable mold for preparing honeycomb porous concrete. The mold includes a horizontally positioned base plate and four side plates vertically surrounding the perimeter of the base plate. The upper surface of the base plate has several vertically upward-pointing cylindrical protrusions, the tops of which are flush with the tops of the side plates, arranged in a regular hexagonal honeycomb matrix. The mold is made of 100 parts of edible-grade corn starch, 20-40 parts of deionized water, and 2-8 parts of food-grade glycerin. This invention, by combining a starch-based substrate with deionized water and food-grade glycerin, improves the mold's compressive strength and ensures the precision of pore formation. The mold eliminates the need for demolding and degrades in natural soil to generate monosaccharides, providing a carbon source for the early growth of internal plants. The integrated hot-pressing structure of the base plate and protrusions eliminates seams, preventing joint leakage and deformation during vibration compaction and ensuring the interconnected porosity of the porous concrete.

Pellets for use in agricultural applications are disclosed herein. The pellets can include a porous substrate having an internal interconnected porosity. An agricultural treatment material can be disposed into at least a portion of the internal interconnected porosity of the porous substrate.

Fuel, intended to be irradiated in a fast neutron nuclear reactor, comprising grains of at least one metal selected from U, Pu or Th, the grains being compressed in a volume, the fuel being porous, the fuel being characterized in that it comprises open intergranular pores, forming an interconnected porosity, the volume fraction of porosity preferably being between 3% and 30%, more than 50% or 80% of the porosity being an open intergranular porosity,

This invention provides a method and application for testing the closed-porosity of shale reservoirs relative to methane gas, specifically relating to the field of shale gas exploration and development technology. The method for testing the closed-porosity of shale reservoirs relative to methane gas includes a undisturbed sample pretreatment module, a undisturbed sample interconnected porosity testing module, a pulverized sample total porosity testing module, and a data processing module. The undisturbed sample interconnected porosity testing module uses methane isothermal adsorption testing for calculation compensation to obtain the total absolute adsorption amount of the undisturbed sample, and obtains the interconnected porosity based on the total absolute adsorption amount. The pulverized sample total porosity testing module is used to pulverize the undisturbed sample, taking a unit mass of pulverized sample and using a testing method that does not penetrate the internal pores of the particles to determine the total volume of the pulverized sample. Then, a methane isothermal adsorption test is performed on the pulverized sample to obtain the total absolute adsorption amount of methane in the pulverized sample, and obtains the total porosity based on the total absolute adsorption amount.

This invention discloses a porous planting substrate loaded with slow-release nitrogen and phosphorus and its preparation method, belonging to the field of agricultural planting auxiliary materials technology. The substrate comprises a porous matrix with three-level interconnected hierarchical pores, nitrogen and phosphorus slow-release components loaded inside and on the surface of the matrix, and functional additives uniformly doped within the pores. The three-level interconnected hierarchical pores include interconnected macropores, mesopores, and nanopores. The nitrogen and phosphorus slow-release components are distributed in three forms: adsorbed, particulate, and coated, on the surface of the pore walls, inside the mesopores, and on the surface of the porous matrix framework, respectively. This invention also discloses a preparation method for the substrate, including crushing and sieving, preparing an impregnation solution, negative pressure impregnation, static curing, gradient drying, and optional post-modification steps. This invention achieves controllable, stepwise slow release of nitrogen and phosphorus nutrients through the synergistic effect of a multi-level porous structure and multiple nutrient fixation mechanisms. The substrate exhibits good water stability, high interconnected porosity, and a simple preparation process, making it suitable for agricultural planting and seedling cultivation scenarios.

The invention discloses a YSZ thermal barrier coating with a controllable non-through pore structure and a preparation method of the YSZ thermal barrier coating, the YSZ thermal barrier coating is formed by YSZ ceramic composite powder through plasma spraying, and the YSZ ceramic composite powder is formed by mixing the following components in percentage by mass: 20-30% of nanocrystalline agglomerated YSZ powder, 20-30% of nanocrystal agglomerated YSZ powder, 5-10% of nanocrystal agglomerated YSZ powder, 5-10% of nanocrystal agglomerated YSZ powder, 5-10% of nanocrystal agglomerated YSZ powder, 5-10% of nanocrystal Micron YSZ (Yttria Stabilized Zirconia) powder accounting for 20 to 30 percent; hollow spherical YSZ (Yttria Stabilized Zirconia) powder accounting for 40%-60%; the porosity of the coating ranges from 6% to 12%, the pore structure is non-through, and pores are distributed in an isolated mode and are not communicated. According to the preparation method, the nanocrystalline agglomerated YSZ powder, the micron YSZ powder and the hollow spherical YSZ powder are mixed, a porous coating microstructure with non-communicated pores is realized through a plasma spraying technology, and the prepared coating has excellent heat resistance, comprehensive mechanical properties and good economical efficiency.

The invention relates to a fuel intended to be irradiated in a fast-neutron nuclear reactor, comprising grains of at least one metal selected from U, Pu or Th, the grains being compressed in a volume, the fuel being porous, the fuel being characterised in that it comprises open intergranular pores forming an interconnected porosity, the porosity volume fraction preferably being between 3% and 30%, and more than 50% or 80% of the porosity being open intergranular porosity.

The invention relates to the technical field of sliding bearing manufacturing, in particular to a composite oil-retaining bearing based on a controllable TPMS structural core and an additive manufacturing method, the composite oil-retaining bearing comprises a protective layer, the TPMS structural core is fixed in an inner hole of the protective layer, and a solid lubricating insert block is arranged in a hole of the TPMS structural core. Compared with a powder sintering bearing, the composite oil bearing provided by the invention has the advantages that the weight is obviously reduced, the communication porosity is greatly improved, the starting friction coefficient is reduced, the sealing reliability is improved, the maintenance period is prolonged, and the batch cost increase is controllable. Through TPMS structure optimization and two implementation modes, the differential requirements of solid lubrication-dominated working conditions and liquid lubrication-dominated working conditions can be met respectively.