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321 results about "Inorganic oxide" patented technology

Inorganic oxides are binary compounds of oxygen with an element. Inorganic Oxides are classified into acidic or basic based on their acid-base characteristics. Acidic oxides gives an acid when combined with water. Examples of Acid oxides are Sulfurous acid, Carbonic acid and Sulfuric acid.

Powder for additive manufacturing

A powder for additive manufacturing which is an inorganic oxide powder, wherein D10 is 1.0 to 4.0 μm, D50 is 5.5 to 9.0 μm, D90 is 20.0 to 40.0 μm, and the volume ratio of particles having a particle size of 16.8 to 60.0 μm is 15.0 to 22.0 vol %.
Owner:RESONAC CORP

Catalytic method for converting alpha-olefin into internal olefin in alkane-olefin mixture and application

The invention discloses a catalytic method for converting alpha-olefin in an alkane-olefin mixture into internal olefin and application, raw materials and a solid acid catalyst are carried out in a fixed bed or a reaction kettle, the reaction temperature is 50-150 DEG C, the reaction pressure is 15-400 psi, and the reaction environment is an inert gas atmosphere; when the reaction is carried out on the fixed bed, the mass space velocity of the solid acid catalyst is 1h <-1 >-20h <-1 >; when the reaction is carried out in the reaction kettle, the conversion frequency of the raw materials is 5000 mol substrate mol acid site density <-1 > h <-1 > to 50000 mol substrate mol acid site density <-1 > h <-1 >; wherein the raw material is an alkane-alkene mixture; the solid acid catalyst comprises an active component and a carrier, wherein the carrier contains at least one inorganic oxide; the active component has a structure as shown in a formula (1) and / or a formula (2), in the formula (1) and the formula (2), R is alkyl or phenyl, and n is greater than or equal to 1. According to the catalysis method provided by the invention, the conversion rate of alpha-olefin can be increased, and the proportion of skeleton isomerization products and oligomers in internal olefin products can be reduced.
Owner:内蒙古伊泰煤炭股份有限公司

Positive plate and battery

The invention relates to the technical field of batteries, in particular to a positive plate and a battery, the positive plate comprises a positive current collector, a functional layer located on the surface of the positive current collector and a positive active material layer located on the surface of the functional layer; the functional layer comprises first lithium conducting particles, and the first lithium conducting particles comprise inorganic oxide particles and solid electrolyte materials coating the surfaces of the inorganic oxide particles; n positive active material particles are arranged on any cross section, perpendicular to the plane of the positive current collector, in the positive active material layer along the thickness direction of the positive current collector; the thickness of the functional layer is Dg, and the unit is mu m; n and Dg satisfy the relational expression: 0.6 < = N / Dg < = 40. By arranging the functional layer containing the first lithium conducting particles, a continuous transverse lithium conducting passage can be formed at the bottom of the active material layer by means of the solid electrolyte coating material of the first lithium conducting particles, the problem of lithium concentration balance among the active material particles at the bottom layer of the positive electrode is effectively solved, and the low-temperature performance of the lithium battery is improved.
Owner:ZHUHAI COSMX BATTERY CO LTD

Infrared detector deep mesa etching process based on three layers of masks and infrared detector

The invention provides an infrared detector deep mesa etching process based on three layers of masks and an infrared detector, and belongs to the field of infrared detector mesa etching. The process comprises the following steps: spin-coating a stress buffer layer on the surface of a superlattice epitaxial layer, and curing and forming; depositing a hard mask serving as an etching barrier layer; depositing an inorganic oxide; spin-coating photoresist to form a composite patterned top layer, and then forming a mesa pattern through a photoetching process; taking the mesa pattern as a mask, and transferring the mesa pattern to the hard mask through reactive ion etching; etching the stress buffer layer by adopting plasma until the surface of the superlattice epitaxial layer is exposed; the three layers of masks are used as blocking, deep etching is carried out through inductively coupled plasma, and the etching depth is 5.6-6 microns; a post-processing step; according to the process provided by the invention, high-quality and high-aspect-ratio mesa etching can be realized on the premise of not introducing extra pollution and remarkably increasing the cost, and the process is suitable for preparing a deep-mesa and high-aspect-ratio device.
Owner:山西创芯光电科技有限公司

Vapor-deposited multilayer film, multilayer structure, packaging material, recovery composition, and recycling method

The present invention provides: a vapor-deposited multilayer film which has high oxygen barrier properties and high water vapor barrier properties, and has sufficient oxygen barrier properties even after a bending treatment; and the like. Provided is a vapor-deposited multilayer film comprising: a multilayer film in which a layer (A), as the outermost layer, a layer (B), and a layer (C) are stacked in this order; and a vapor-deposited inorganic layer (I) stacked on the exposed surface side of the layer (A). The vapor-deposited inorganic layer (I) is a vapor-deposited metal layer that is mainly composed of aluminum, or a vapor-deposited inorganic oxide layer that is mainly composed of alumina or silica. The layer (A) contains, as a main component, an ethylene-vinyl alcohol copolymer (a) that has an ethylene unit content of 36-60 mol%; the layer (B) contains, as a main component, an ethylene-vinyl alcohol copolymer (b) that has an ethylene unit content of 20-35 mol%; and the layer (C) contains a polyethylene or a polypropylene as a main component. The average thickness of the multilayer film is 300 µm or less.
Owner:KURARAY CO LTD

Inorganic oxide particles

Inorganic oxide particles having a D50 of 5.5-9.0 μm and a pressure loss of 1.75-2.81 kPa in air permeation at a pressure of 12 kPa.
Owner:RESONAC CORP

Mesoporous Ni-Mn composite oxide catalyst, preparation method and application of mesoporous Ni-Mn composite oxide catalyst in NH3-SCR

The invention belongs to the technical field of environmental catalytic materials, and particularly relates to a mesoporous Ni-Mn composite oxide catalyst, a preparation method and application of the mesoporous Ni-Mn composite oxide catalyst in NH3-SCR. The catalyst comprises the following components in percentage by mass: 6.2%-6.7% of NiO; 3.9%-14.4% of MnO2 (manganese dioxide); 4.3%-7% of CeO2; zrO2: 3.05% to 5%; an inorganic oxide carrier with a regular mesoporous structure: the balance of the mass of the catalyst; niO and MnO2 exist in the form of a Ni-Mn composite oxide; the CeO2 and the ZrO2 exist in the form of a CeO2-ZrO2 solid solution; the following relation is satisfied: n (NiO) / n (MnO2) = (0.5-2): 1; n (CeO2) / n (ZrO2) = 1: 1; and n (CeO2 + ZrO2) / n (NiO + MnO2) is equal to (0.2-0.6): 1.
Owner:UNIV OF SCI & TECH OF CHINA

Inorganic oxide particle process with improved energy and water efficiency

PCT designated stageWO2025250570A1Inorganic pigment treatmentWater efficiencySlurry
The present invention relates to a treated inorganic oxide slurry and process of making including: a. treating an inorganic oxide particle with aqueous inorganic metal salt; b. washing the treated inorganic oxide particle with water and removing aqueous inorganic metal salt to form a washed slurry having 30-60% by weight treated inorganic oxide particles in water; c. milling the washed slurry to form a milled slurry; d. removing water from the milled slurry to form a dewatered filter cake having 60-85% by weight treated inorganic oxide particles in water; and e. contacting the dewatered filter cake with water, dispersant, or a mixture of water and dispersant to form a product slurry. The process uses less energy and water compared with prior art processes that include jet milling and drying steps, while maintaining performance. The slurries can be used in applications including coatings and paper.
Owner:THE CHEMOURS CO FC LLC

Composite material, and preparation method and application thereof

The invention discloses a composite material and a preparation method and application thereof, the composite material comprises hard carbon and a first material, the first material comprises an organic metal salt and an inorganic oxide, the metal element in the organic metal salt comprises sodium or lithium, the organic metal salt can fill the surface defect of the hard carbon, and the inorganic oxide is added to the surface defect of the hard carbon. The inorganic oxide can be used for constructing a nanoscale ion sieve, so that the balance of the metal storage rate of the surface and the bulk phase of the hard carbon can be improved, the composite material is endowed with good metal ion transmission dynamics performance and electrochemical performance, and the composite material can be used for preparing an electrode of a battery and has a wide application prospect. And the performance and the safety of the battery can be improved.
Owner:HUNAN SHINZOOM TECH

Structural color pressure-sensitive film based on hollow polymer colloidal photonic crystal and preparation method and application thereof

The application discloses a structural color pressure-sensitive film based on a hollow polymer colloidal photonic crystal and a preparation method and application thereof, and belongs to the technical field of force-induced color-changing materials. The preparation method of the structural color pressure-sensitive film comprises the following steps: (1) uniformly dispersing core-shell nano colloidal particles in an organic solvent to obtain a colloidal particle dispersion liquid; the shell layer of the core-shell nano colloidal particles is a polymer material, and the core layer is an inorganic oxide; (2) coating the colloidal particle dispersion liquid on the surface of a flexible substrate, and obtaining a precursor photonic crystal film after heating; and after removing the core layer of the core-shell nano colloidal particles in the precursor photonic crystal film by acid treatment etching, the structural color pressure-sensitive film is obtained. The preparation method of the structural color pressure-sensitive film is simple, the conditions are mild, and no pigment dye molecules are needed; by utilizing the pressure deformation and shape memory characteristics of a single hollow polymer colloidal particle itself and the inherent structural color characteristics of a photonic crystal, the structural color pressure-sensitive film can realize the regulation and memory of rich and high-saturation structural colors under the action of pressure.
Owner:HANGZHOU NORMAL UNIVERSITY

Optical laminate for electronic paper, and electronic paper using the same

ActiveJP7911200B1PolyesterThin membrane
To provide an optical laminate for electronic paper that suppresses the deterioration of barrier properties over time. An optical laminate 200 for electronic paper having a first surface P1 and a second surface P2 opposite to the first surface, wherein the optical laminate comprises a first substrate 11 and a barrier film 100 having an inorganic oxide layer 21 on a second substrate 12, the first substrate 11 being located on the first surface P1 side of the second substrate 12, the inorganic oxide layer 21 being located on the second surface P2 side of the second substrate 12, the first substrate 11 being a triacetylcellulose film, and the second substrate 12 being a polyester film.
Owner:DAI NIPPON PRINTING CO LTD

W / o type composition comprising polyion complex and powder

The present invention relates to a composition comprising a plurality of aqueous phases comprising: (a) at least one cationic polymer; (b) at least one non-polymeric acid having two or more pKa values or salt thereof; (c) at least one anionic polymer, and (d) water, and a fatty phase comprising: (e) at least one oil, wherein the aqueous phases are dispersed in the fatty phase, and the composition further comprises (f) at least one first powder comprising (i) at least one inorganic oxide, and (ii) at least one fatty acid or salt thereof. The composition according to the present invention is stable and can provide a keratin material such as skin with, at least, an acceptable level of sebum control, good spreadability and comfortable feeling to use.
Owner:LOREAL SA +5

Ink-repellent member, ink jet head, method of producing article, and liquid ejection apparatus

Provided is an ink-repellent member including an underlying portion containing an inorganic oxide, the ink-repellent member having a fluorine compound bonded to a surface of the underlying portion, wherein the fluorine compound has a chain structure, and is bonded to the surface by forming a phosphonic acid ester structure at each of both ends thereof.
Owner:CANON KK

Positive electrode-side electrolyte separator, negative electrode-side electrolyte separator, lithium metal battery, and electric device

The application discloses a positive electrode side electrolyte diaphragm, a negative electrode side electrolyte diaphragm, a lithium metal battery and an electric device, relates to the technical field of batteries, and the positive electrode side electrolyte diaphragm is applied to a lithium metal battery, a material of the positive electrode side electrolyte diaphragm comprises a first organic polymer, a first lithium salt, a first inorganic nano solid-state electrolyte and first inorganic oxide particles, wherein: the first organic polymer comprises an organic polymer with an antioxidation performance. By introducing the organic polymer with the antioxidation performance, the first lithium salt and the first inorganic oxide particles as the positive electrode side electrolyte diaphragm, the flexible characteristics of the organic solid-state electrolyte are utilized to reduce contact internal resistance, the risk of internal side reactions can be reduced, the rapid conduction of lithium ions is ensured, the formation of lithium dendrites is inhibited, and the safety and energy density of the battery are improved.
Owner:DONGFENG MOTOR GRP

Double coating structure based on multifunctional water-based low-temperature paint, and coating system based on multifunctional water-based low-temperature paint and use thereof

A double coating structure based on a multifunctional water-based low-temperature paint, and a coating system and the use thereof. The double coating structure comprises a first coating and a second coating, wherein the first coating comprises a mixture of a flaky metallic pigment and an inorganic oxide pigment; the second coating comprises a transparent organic color paste; and a first-coating paint composition used for the first coating and a second-coating paint composition used for the second coating are both mixtures containing an acrylic resin emulsion and a polyurethane dispersion. The double coating structure uses the technical solution of a pigment mixture and does not contain any curing agent such as an isocyanate; the obtained double coating structure has high radar wave transmission performance, high infrared reflection performance and high reflective insulation capacity, and is particularly suitable for black or silver paint systems; and since a water-based low-temperature paint is used, the double coating structure has the characteristics of significant low-temperature quick-drying film formation, a thin coating and a low VOC content, and can realize a coating process that has low energy consumption and is healthy and environmentally friendly.
Owner:NIPPON PAINT CHINA

Three-layer mask-based deep mesa etching process for infrared detector and infrared detector

The application provides an infrared detector deep mesa etching process based on a three-layer mask and an infrared detector, and belongs to the field of infrared detector mesa etching. The process comprises the following steps: spin-coating a stress buffer layer on the surface of a superlattice epitaxial layer and curing the stress buffer layer; depositing a hard mask as an etching barrier layer; depositing an inorganic oxide; spin-coating a photoresist to form a composite patterned top layer, and then forming a mesa pattern through a photolithography process; taking the mesa pattern as a mask, transferring the mesa pattern to the hard mask through reactive ion etching; etching the stress buffer layer by using plasma until the surface of the superlattice epitaxial layer is exposed; taking the three-layer mask as a barrier, performing deep etching by using inductively coupled plasma, and the etching depth is 5.6-6 microns; and performing a post-processing step. The process of the application can realize high-quality and high-aspect-ratio mesa etching without introducing additional pollution and significant cost increase, and is suitable for the preparation of deep mesa and high-aspect-ratio devices.
Owner:山西创芯光电科技有限公司

Composition containing powder for controlling sebum

To provide a composition containing a novel ingredient that can bring about at least an acceptable level of sebum control in keratinous substances such as skin. [Solution] The present invention relates to a composition comprising (a) (i) at least one inorganic oxide, preferably a metal oxide, more preferably an alkaline earth metal oxide, and (ii) at least one fatty acid or a salt thereof, preferably a saturated fatty acid or a salt thereof, more preferably a metal salt of a saturated fatty acid, and (b) at least one second powder selected from particles containing silica and hydroxyapatite. The composition according to the present invention can provide at least an acceptable level of sebum control to keratinous substances such as skin.
Owner:LOREAL SA

All-solid-state battery and method for manufacturing the same, and battery module

The application discloses a full solid battery and a preparation method thereof, and a battery module. The full solid battery comprises a positive electrode sheet, a negative electrode sheet and a sulfide solid electrolyte layer between the positive electrode sheet and the negative electrode sheet which are arranged in a stack; the positive electrode sheet comprises a positive electrode current collector and a composite positive electrode layer on at least one side of the positive electrode current collector; wherein the composite positive electrode layer comprises a high-voltage oxide positive electrode main material, an oxide solid electrolyte, a conductive oxide and a sintering aid; the particles of the high-voltage oxide positive electrode main material, the oxide solid electrolyte and the conductive oxide are combined through sintering necks based on the sintering aid; the sintering aid comprises at least one of a metal element, an inorganic oxide, a metal fluoride, a metal nitride and a lithium-containing compound; the problems of poor physical contact and unstable chemical interface between the oxide positive electrode and the sulfide solid electrolyte are solved, and the safety performance of the battery is greatly increased.
Owner:SUZHOU QINGTAO NEW ENERGY TECH CO LTD

Wire grid polarizing element, method for manufacturing a wire grid polarizing element, projection display device, and vehicle

PendingJP2026110921AWire gridOptical property
This suppresses the tilting of the convex portions of the grid structure caused by the formation of the functional film, thereby improving optical properties. [Solution] The wire grid polarizing element 1 comprises a substrate 10, a grid structure 20 in which a base portion 21 and a plurality of protrusions 22 are integrally formed, a functional film 30 covering a portion of the protrusions 22, and a reinforcing film 51. The reinforcing film 51 is made of an inorganic oxide and is interposed between a portion of the protrusions 33 covered by the functional film 30 and the functional film 30, reinforcing the protrusions 22. The reinforcing film 51 covers at least the tip 22a and the upper sides of both sides 22b of the protrusions 22. The functional film 30 covers the top of the protrusions 22 via the reinforcing film 51, but does not cover the bottom side of the protrusions 22 or the base portion 21, and its coverage rate (Rc) is 30% or more and 70% or less.
Owner:DEXERIALS CORP

Coating fluid for forming porous film, and porous film

The purpose of the present invention is to provide: a coating fluid for forming a porous film having excellent film strength; and a member including the porous film. The coating fluid is characterized by comprising inorganic oxide particles, an inorganic-binder composition, and a sulfonyl compound, wherein the sulfonyl compound is represented by formula 1 or formula 2. (R1 and R2 are organic groups and R1 and / or R2 is a group including a conjugated structure, the conjugated structure being directly bonded to the S atom.) (In formula 2, R3 to R6 are each a hydrogen atom or any group.)
Owner:CANON KK

Capacitor

This capacitor (10) comprises: a first electrode (111); a dielectric layer (112) formed on the surface of the first electrode (111); an inorganic conductive layer (120) disposed on the dielectric layer (112); and a second electrode (131) disposed on the inorganic conductive layer (120). The main component of the inorganic conductive layer (120) is a fluorine-containing inorganic oxide.
Owner:PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD

Lubricant composition for plastic working and method for producing metal material with lubricant coating

To provide a lubricant composition for plastic working that enables processing without a chemical conversion coating even in severe plastic working such as forging of steel or stainless steel and that forms a coating exhibiting excellent working lubricity even when exposed to a moisture-absorbing environment.SOLUTION: A lubricant composition for plastic working comprises a polymer A having a polyamide chain and a polyalkylene oxide chain within one molecule, and one or more inorganic substances B selected from a smectite clay mineral and an inorganic oxide represented by aMxOy-bSiO2-cH2O, where a, b, and c are rational numbers satisfying 0≤a≤3, 0≤b≤4, 0≤c≤5, and 1≤a+b, x and y satisfy x=2 and y=1, or x=y=1, or x=2 and y=3, and M is Mg or Al.SELECTED DRAWING: Figure 1
Owner:NIHON PARKERIZING CO LTD

Planar-type heating apparatus and electric oven including the same

A planar-type heating apparatus may include: a graphene layer; a graphene oxide film layer on the graphene layer in a first direction; an inorganic oxide film layer on the graphene oxide film layer in the first direction; a first electrode electrically connected to the graphene layer; and a second electrode electrically connected to the graphene layer, wherein the graphene layer is between the first electrode and the second electrode.
Owner:SAMSUNG ELECTRONICS CO LTD

Electronic component

Provided is an electronic component comprising: an element body (20); an inorganic oxide layer (30) that covers an outer surface (21) of the element body (20); and a glass layer (50) that covers an outer surface (31) of the inorganic oxide layer (30). The glass layer (50) contains one or more elements selected from alkali metals and alkaline earth metals. Voids (P) are present between the element body (20) and the inorganic oxide layer (30).
Owner:MURATA MFG CO LTD

Catalytic cracking catalyst and method for its preparation

The application provides a catalytic cracking catalyst and a preparation method thereof. The composition of the catalyst comprises: 15-55% of modified ZSM-5 molecular sieve in dry basis, 0.5-10% of Y-type molecular sieve in dry basis, 0-5% of high-silicon ZSM-5 molecular sieve in dry basis, 5-55% of clay in dry basis, 0-25% of pseudo-boehmite in dry basis, 4-70% of titanium-containing composite binder in dry basis, 0-15% of binder in oxide, 0-30% of inorganic oxide carrier material in oxide, 0-20% of phosphorus in oxide and 0-5% of modified metal compound in oxide. The catalytic cracking catalyst can promote the conversion of heavy oil, reduce the heavy oil yield and reduce the coking tendency in the catalytic cracking process, and has high low-carbon olefin yield, excellent reaction selectivity and use performance.
Owner:PETROCHINA CO LTD

Cellulose-based radiation refrigeration mulching film and preparation method thereof

The invention discloses a cellulose-based radiation refrigeration mulching film and a preparation method thereof.The refrigeration mulching film comprises a cellulose matrix and radiation refrigeration nano-particles mixed in the cellulose matrix, and the mass of the radiation refrigeration nano-particles accounts for 10%-60% of the total mass of the cellulose matrix and the radiation refrigeration nano-particles; the radiation refrigeration nano-particles are composed of hexagonal boron nitride and inorganic oxide particles, and the mass ratio of the hexagonal boron nitride to the inorganic oxide particles is (1-3): 1. The preparation method comprises the following steps: mixing and dispersing the cellulose matrix and the radiation refrigeration nano-particles, and carrying out molding and hot pressing treatment to obtain the radiation refrigeration mulching film. The prepared radiation refrigeration mulching film has a good refrigeration effect and mechanical performance, can block solar radiation for a long time and reduce evaporation, and further has the advantage of being degradable.
Owner:CENTRAL SOUTH UNIVERSITY OF FORESTRY AND TECHNOLOGY +1

Layered catalytic article

The present invention relates to a catalytic article for treating an exhaust gas stream, the catalytic article comprising:-a substrate having an inlet end and an outlet end defining an axial length; -a first coating extending part or the entire axial length of the substrate, the first coating comprising a first catalyst comprising a vanadium component; -a second coating extending part or the entire axial length of the substrate, the second coating comprising a second catalyst comprising a noble metal component; and-a third coating extending part or the entire axial length of the substrate, the third coating comprising or consisting of an inorganic oxide selected from the group consisting of titanium oxide, silicon oxide, zirconium oxide, tungsten oxide, rare earth oxides such as lanthanum oxide and cerium oxide, any combination thereof or a composite oxide thereof, wherein the third coating is positioned as an intermediate layer between the first coating and the second coating over part or the entire axial length of the substrate. The invention also relates to a method and system for treating an exhaust stream containing nitrogen oxides with the catalytic article.
Owner:BASF CORPORATON

Preparation method of organic-inorganic interface buffer composite coating with thermal stress slow release function

The invention belongs to the technical field of transparent conductive film interface engineering, and provides a preparation method of an organic-inorganic interface buffer composite coating with thermal stress slow release, raw materials comprise polymethyl methacrylate powder, inorganic oxide nanoparticles and a silane coupling agent, the polymethyl methacrylate has the advantages of high transparency, light weight and toughness, and the inorganic oxide nanoparticles have the characteristics of good thermal stability, high strength and hardness and strong modifiability. The silane coupling agent has hydrolyzable silane groups which are subjected to condensation reaction with the inorganic oxide nanoparticles and also contains polar groups which can be subjected to intermolecular dipole-dipole strong combination with the polymethyl methacrylate, so that the effective combination of the polymethyl methacrylate powder and the inorganic oxide nanoparticles is realized through the silane coupling agent; therefore, the organic-inorganic composite coating which is high in visible light transmittance, good in thermal stability and strong in interface action is prepared.
Owner:UNIV OF ELECTRONICS SCI & TECH OF CHINA

Coated positive electrode material and preparation method thereof, positive electrode plate and solid sulfide battery

The embodiment of the invention provides a coated positive electrode material and a preparation method thereof, a positive electrode plate and a solid sulfide battery. The preparation method comprises the following steps: carrying out first contact reaction on a lithium-based positive electrode material and a first coating solution to obtain a first product; performing first annealing treatment on the first product to obtain a second product; performing a second contact reaction on the second product and a second coating solution to obtain a third product; and carrying out second annealing treatment on the third product to obtain the coated positive electrode material. A double-layer coating mode is adopted, a lithium-containing inorganic oxide coating layer is firstly formed on the surface of the positive electrode material, and then a conductive polymer elastic polymer coating layer is added, so that the purposes of stabilizing an interface between the positive electrode material and a sulfide electrolyte and adapting to the volume change of the positive electrode material are achieved; therefore, the technical effect of improving the energy density and the cycling stability of the solid-state battery is achieved, and the technical problem of battery performance degradation caused by interface chemical reaction and physical stress is solved.
Owner:CHERY AUTOMOBILE CO LTD

Toner

A toner comprising a toner particle comprising a binder resin, a nonmagnetic inorganic oxide particle A, and a magnetic iron oxide particle B, wherein a softening point of a chloroform-soluble component of the toner particle is not greater than 90° C.; the nonmagnetic inorganic oxide particle A and the magnetic iron oxide particle B are internally added to the toner particle; the nonmagnetic inorganic oxide particle A comprises as its main component at least one element selected from the group consisting of Si, Mg, Al, Ti, and Sr; a proportion of the inorganic oxide particles having a long diameter of specific length is in specific range; and a value of a ratio of a number-average particle diameter of the long diameter for the nonmagnetic inorganic oxide particle A, to a number-average particle diameter of the long diameter for the magnetic iron oxide particle B, is 5 to 30.
Owner:CANON KK