15 results about "Porosimetry" patented technology

1. A method for making a ceramic honeycomb wall-flow filter substrate supporting an on-wall coating, wherein a section of the on-wall coated filter substrate analyzed by mercury porosimetry has a pore volume of 0.05 to 0.5 μm diameter as a percentage of the mercury intrusion volume of at least 15.0% of the section, and (i) an equivalent spherical diameter D(v,0.5) of 0.5 to 1 μm, which is equal to 10 to 35 wt. % of water, carboxylic acid, inorganic oxide particles, or a particulate insoluble cellulose pore former of heterogeneous morphology, with D(v,0.9) of 8 to 20 μm, relative to 100 wt. % of inorganic oxide particles. 4 μm and having a modal aspect ratio (width / length) of 0.3 to 0.9; (ii) coating the slurry onto at least first channels of a substrate, the substrate having an average pore size (D50) of 6 to 15 μm and a porosity of less than 60% before any coating; and (iii) drying and calcining the slurry-coated substrate, wherein the product of step (iii) has a porosity of 0.07 to 0.4 g / in based on the substrate weight before step (ii). 3 A method wherein sufficient slurry is coated onto a substrate to have a coating loading of (4.3-24.4 g / L) and an average on-wall coating thickness of the coated substrate is 5-70 μm.

This invention belongs to the field of electrode material technology, specifically relating to an anode foil, its preparation method, and an aluminum electrolytic capacitor. The preparation method of the anode foil includes performing a secondary porosimetry etching on the aluminum foil after primary porosimetry etching. The secondary porosimetry etching includes multiple stages of porosimetry etching, with a mid-treatment process between each adjacent stage. This preparation method involves multiple stages of porosimetry etching, and the mid-treatment process between each adjacent stage effectively increases the pore size of the etched foil, making it suitable for preparing ultra-high voltage anode foils with low loss and high specific capacitance.

Provided is a precursor of a positive electrode active material, which enables a positive electrode active material having low resistance to be obtained. A precursor of a positive electrode active material, the precursor comprising secondary particles in which a plurality of primary particles are agglomerated, the primary particles comprising a nickel composite hydroxide, the average pore diameter of the precursor, as determined by mercury porosimetry, being less than 5.80 μm, and the total pore specific surface area being more than 0.11 m 2 / g.

This invention relates to a composition based on Al and Ce in oxide form (composition C1); or based on Al, Ce, and La in oxide form (composition C2), the composition having the following proportions: - CeO2 proportion between 3.0 wt% and 35.0 wt%; - La2O3 proportion (for composition C2 only) between 0.1 wt% and 6.0 wt%; - the remainder being Al2O3; the composition exhibits the following porosity distribution: - pore volume in the range of pore size between 5 nm and 100 nm between 0.35 and 1.00 mL / g; and - pore volume less than or equal to 0.15 mL / g in the range of pore size between 10 nm and 5 nm. The pore volume in the range of 0 nm to 1000 nm, determined by mercury porosimetry; and the following characteristics: - an average crystallite size of less than 45.0 nm, preferably less than 40.0 nm, after calcination in air at 1100 °C for 5 hours (denoted as D1100 °C-5h); - an average crystallite size of less than 25.0 nm, preferably less than 20.0 nm, and even more preferably less than 15.0 nm, after calcination in air at 900 °C for 2 hours (denoted as D900 °C-2h); and - the increase in the average crystallite size of less than 30.0 nm, preferably less than 25.0 nm, ΔD, calculated by the following formula: ΔD = D 1100℃‑2h -D 900℃‑5h The average size of the crystallites was obtained by XRD from the diffraction peaks corresponding to the cubic phase of cerium oxide, which are typically present at 2Φ between 28.0 and 30.0 [111].

The present invention provides porous spherical silica having a large modal pore size, a high pore volume, and a sharp pore size distribution, and a method for producing the same. The pore volume measured by mercury porosimetry is 0.5 ml / g or more and 8 ml / g or less, The most common pore size measured by mercury porosimetry is 5 nm or more and 50 nm or less, The porous spherical silica is characterized in that the ratio of the volume of pores present within a range of ±5 nm of the mode pore diameter to the total volume of pores is 40% or more. The porous spherical silica can be produced by forming a fumed silica dispersion, which has been dispersed so as to have a particle size distribution within a predetermined range, into spheres by an emulsion method, and then gelling the spheres.

The present application provides a material for plasma spraying that enables formation of a HAp coating film that is high in hardness and less likely to wear even under plasma spraying conditions with low flame energy. The HAp powder has an average particle diameter (D 50 ) of 15 to 40 μm and a pore volume of pores with a pore diameter of 2000 nm or less as measured by mercury porosimetry of 0.01 to 0.30 cc / g. The HAp powder enables plasma spraying even under plasma spraying conditions with low flame energy and enables formation of a HAp coating film that is high in hardness and less likely to wear.

Disclosed herein is a concrete article comprising: a plurality of pores having an average pore diameter of less than 1 micron as measured using mercury intrusion porosimetry (MIP) with a pressure of less than 440 MPa and overall porosity of less than 15% measured using helium porosimetry, wherein the concrete article exhibits a gas permeability of 10−17 to 10−22 m2 as measured under steady-state conditions (with an upstream chamber pressure of 0.31 MPa and a downstream chamber pressure of less than 5 Pa) and is configured to substantially prevent a gas leak. Also disclosed are methods of making the same articles.

Disclosed in the present application are a negative electrode material and a lithium-ion battery. The negative electrode material comprises a carbon material having pores therein. The pores are characterized in that the pore volume of pores having a pore diameter of 3 nm or more and 1000 nm or less as measured by means of mercury porosimetry is V1, where V1<0.1 mL / g; the pore volume of pores having a pore diameter of 3 nm or more and 400 nm or less as measured by means of mercury porosimetry is V2, and the range of the V2 / V1 ratio satisfies 40-70%; and the pore volume of pores having a pore diameter of 3 nm or more and 500 nm or less as measured by means of mercury porosimetry is V3, and the range of the V3 / V1 ratio satisfies ≥60%.

The precipitated silica having a low BET specific surface area according to the present invention has a total pore volume of 2.50 cm3 / g or more as measured by mercury intrusion method, a BET specific surface area of 15-35 m2 / g, a volume average particle diameter (D500 min) of 2.0-25 [mu] m in the particle size distribution in a 4 mass% precipitated silica slurry, and a particle diameter change rate (A) of 0.50-0.90 as calculated by the following formula. The change rate A of the particle size is equal to (D500min-D505min) / D500min; the volume average particle diameter D505 min is the volume average particle diameter in the particle size distribution when a 4 mass% precipitated silica slurry is subjected to an ultrasonic treatment for 5 minutes. The precipitated silica of the present invention exhibits excellent abrasiveness from the viewpoint of the polishing speed and the smoothness of the polishing surface. Further, the present invention relates to a composition comprising the precipitated silica and a method for producing the precipitated silica.

Provided is a precursor of a positive electrode active material, which enables a positive electrode active material having excellent durability to be obtained. A precursor of a positive electrode active material, the precursor comprising secondary particles in which a plurality of primary particles are agglomerated, the primary particles comprising a nickel composite hydroxide, the average pore diameter of the precursor, as determined by mercury porosimetry, exceeding 3.60 μm, and the total pore specific surface area being less than 0.26 m 2 / g.

This invention relates to a method for manufacturing a high-capacity anode foil with improved porosity uniformity in aluminum electro-etching foil. The method comprises pretreatment, multi-V porosimetry etching, multi-V enlargement etching, and post-treatment steps. The invention primarily relates to the porosimetry etching process, which involves adding a metal surface cleaning agent to the porosimetry solution to more effectively reduce the formation of the Al2(SO4)3 film on the foil surface during the multi-V porosimetry process, exposing more Al substrate. This particularly improves the surface condition of areas where porosimetry is difficult, resulting in more opportunities for porosimetry and thus producing a high-capacity anode foil with more and more uniform pores.

According to an embodiment of the present invention, there is provided an electrode comprising a current collector and an active material–containing layer on the current collector. The active material-containing layer contains an active material and a conductive agent. The active material contains a lithium nickel cobalt manganese composite oxide. The specific surface area SBET of the active material–containing layer as measured by the nitrogen gas adsorption method and the pore specific surface area SHg of the active material–containing layer as measured by mercury porosimetry satisfy the relation 0.8 < SBET / SHg < 2.0. The volume resistivity RV of the material-containing layer is 10 Ω·cm or less. The interface resistance RI of the interface between the current collector and the active material–containing layer is 0.5 Ω·cm2 or less. The ratio RV / RI of the volume resistivity RV to the interface resistance RI is between 3 cm-1 and 20-1, inclusive.

The present invention pertains to a carbon material composition containing: a carbon material (A) that contains graphite having an amorphous carbonaceous substance or a graphitic substance and that has a pore distribution having two or more peaks as measured by mercury intrusion method; y < =-0.0084 x + 0.13 is satisfied, where y (mL / g) is the cumulative pore volume equal to or less than the minimum value between the peak having the smallest pore diameter and the next peak, and x (%) is the coating rate of an amorphous carbonaceous substance or a graphitic substance of graphite; the carbon material (B) has a pellet density of 1.80 g / cm3 or more.

Provided is a positive electrode for a nonaqueous electrolyte secondary battery, which has a low porosity of a positive electrode composite sheet and can suppress a decrease in charge / discharge cycle characteristics. The positive electrode (11) includes a positive electrode core material (30) and a positive electrode composite sheet (32) bonded to a surface of the positive electrode core material (30), the positive electrode composite sheet (32) includes a conductive material-coated active material in which a conductive material is attached to a surface of a positive electrode active material and a fibrous binder, the porosity of the positive electrode composite sheet (32) is 17.8% or greater and 23.2% or less, and a mode diameter of the positive electrode composite sheet (32) obtained by a mercury porosimetry method is greater than 0.19 µm and less than 0.87 µm.

According to an embodiment, there is provided an electrode comprising an active material that contains an oxide represented by the general formula: LixNi1-a-b-cCoaMnbMcO2 (in the formula, x, a, b, and c are 0.9 ≤ x ≤ 1.25, 0.05 ≤ a ≤ 0.5, 0.03 ≤ b ≤ 0.5, and 0 ≤ c ≤ 0.2, and M includes one or more metal elements other than Ni, Co, and Mn). The electrode satisfies formula (1).　Formula (1) 0.001 < B / (A + B) ≤ 0.09. In formula (1), A is the pore volume (mL / g) in the pore diameter range from at least 0.01 μm to not greater than 0.3 μm in the pore diameter distribution according to mercury porosimetry of the electrode, and B is the pore volume (mL / g) in the pore diameter range from greater than 0.3 μm to and not greater than 1 μm in the pore diameter distribution according to mercury porosimetry of the electrode.