81 results about "Elemental iron" patented technology

The invention discloses a vanadium iron-site doped iron phosphate material and a preparation method, and relates to the technical field of lithium ion battery positive electrode material preparation, pure water is used as a base solution, and a vanadium salt solution with the pH value of 2.0-3.0, a ferrite solution with the pH value of 1.0-2.5 and a phosphorus-oxygen mixed solution with the pH value of 5.0-7.0 are simultaneously added into a reaction kettle in a three-strand parallel flow mode for a co-precipitation reaction. By controlling the acid environment of a key solution system, reduction of metavanadate radicals or generation of ferric vanadate precipitates is effectively inhibited, and vanadium elements are successfully and uniformly doped to iron sites of iron phosphate crystal lattices; the mass ratio of iron to phosphorus in the obtained iron phosphate material is stabilized at 95-98%, the doping amount of vanadium is 100-10000 ppm, and the vanadium is uniformly distributed. Lithium iron phosphate prepared by taking the material as a precursor has higher discharge capacity and compaction density, and the electrochemical performance of a lithium ion battery is remarkably improved.

This invention provides a highly conductive preformed solder sheet, comprising a core layer and a shell layer disposed around the core layer. By embedding the solid flux core layer within the solder alloy layer to form a sandwich-like shape, the flux can be effectively protected from oxidation. There is no need to apply flux before brazing or remove it after brazing, reducing manufacturing costs and the void rate on the welded surface, thus improving the reliability of the solder sheet. The solder alloy shell is composed of tin, silver, copper, indium, cerium, vanadium, lutetium, yttrium, and zinc. The addition of small amounts of rare earth elements lutetium, yttrium, and cerium improves the conductivity and heat transfer of the solder sheet. The addition of indium, vanadium, and zinc increases the melting point of the solder sheet and improves its solidification state. Since no magnetic materials such as lead, iron, cobalt, nickel, or niobium are added, signal interference caused by metals is avoided.

The invention discloses a nano SiO2 composite iron microsphere toughening agent for well cementation cement, and belongs to the technical field of petroleum and natural gas well cementation engineering materials. The preparation method of the flexibilizer comprises the following steps: adding ferric trichloride into ethylene glycol, and stirring and dissolving at normal temperature to obtain a solution A; the preparation method comprises the following steps: adding polyvinylpyrrolidone into ethylene glycol, stirring and dissolving at a certain temperature to obtain a solution B, and then adding sodium citrate to prepare a solution C; tetraethoxysilane is added into deionized water and then mixed with the solution A, a hydrolysis reaction of tetraethoxysilane is carried out, and a solution D with nano SiO2 is prepared; gradually and slowly dropwise adding the solution D into the solution C at a certain temperature, and carrying out a first oxidation-reduction reaction; cooling to room temperature, adding sodium borohydride, and carrying out a second oxidation-reduction reaction; and filtering, washing and drying the solution to obtain the flexibilizer. The cement stone is endowed with high toughness and compressive strength through the synergistic effect of the iron elementary substance and the nano SiO2, and the cement stone has a wide market prospect.

The invention discloses an areca-nut solid fertilizer for improving the content of catechin and precise nutrition of areca-nuts and application of the areca-nut solid fertilizer, and belongs to the technical field of fertilizer preparation. The preparation method comprises the following steps: mixing cassava straws, cassava residues, hermetia illucens sand, calcium superphosphate, quick lime and zymophyte, and carrying out first composting fermentation to obtain a first fermented product; and adding macroelements containing monopotassium phosphate, potassium nitrate, urea, calcium carbonate and magnesium sulfate in a specific proportion, microelements containing boron, zinc, copper, iron and manganese in a specific proportion and bacillus subtilis into the first fermented product, carrying out second composting fermentation, and carrying out aging treatment to obtain the betel nut solid fertilizer. The prepared betel nut solid fertilizer can accurately provide nutrients according to the requirements of betel nuts for various nutrient elements, and negative effects on soil due to excessive nutrient elements are avoided; meanwhile, the content of areca catechin is increased, and the nutritional value of the areca catechin is enhanced.

This invention relates to the field of comprehensive utilization of solid waste, specifically providing a process for treating ilmenite ore using solid waste pyrolysis products. The process involves preheating the ilmenite ore to above 1000°C with low-oxygen flue gas, then feeding it along with waste plastics, waste coke, and other raw materials into a pyrolysis reduction reactor for pyrolysis reduction. The pyrolysis of waste plastics and waste coke generates reducing gases, ensuring the device is completely in a reducing gas atmosphere. These gases react with the ilmenite ore at high temperatures to generate magnetically separable elemental iron and Fe3O4, thereby increasing the actual FeTiO3 content. Compared to existing ilmenite ore processing technologies, this method significantly increases the processing temperature, improves processing efficiency, and achieves comprehensive energy utilization.

The invention relates to a crop nutrition and fortification composition comprising: elemental sulfur in the order of 1% to 90% by weight; one or more water-insoluble or water-soluble iron salts or derivatives or mixtures thereof, wherein the elemental iron content is in the order of 0.1% to 50% by weight; one or more water-insoluble or water-soluble zinc salts or derivatives or mixtures thereof, wherein the elemental zinc content is in the order of 0.1% to 55% by weight; one or more water-insoluble or water-soluble magnesium salts or derivatives or mixtures thereof, wherein the elemental magnesium content is in the order of 0.5% to 50% by weight; one or more water-insoluble or water-soluble boron salts or derivatives or mixtures thereof, wherein the elemental boron content is in the order of 0.01% to 25% by weight; one or more water-insoluble or water-soluble manganese salts or derivatives or mixtures thereof,where the elemental manganese content is in the order of 0.1% to 40% by weight; one or more water-insoluble or water-soluble copper salts or derivatives or mixtures thereof, where the elemental copper content is in the order of 0.1% to 40% by weight; and one or more surfactants in the order of 0.1% to 40% by weight. The composition is presented in the form of water-dispersible granules and liquid suspension, where the compositions have a particle size in the order of 100 nanometers to 5 microns and have a mean particle size diameter distribution of less than 1000 nanometers, and where the total content of the water-soluble salts, derivatives, or mixtures in the composition does not exceed 80% by weight of the total composition. The invention also relates to a process for preparing the nutritional composition and fortifying crops and to a method for treating plants, seeds, crops, plant propagation material,locus, or parts thereof, or soil with the nutritional and fortifying composition of crops.

In an iron (II) citrate monohydrate, identified by the formula FeC6H6O7-H2O ( Ferrous citrate monohydrate or iron citrate (II) monohydrate), obtained according to a particular production method, citric acid and elemental iron are bound in a molecular complex where the iron is agglomerated in the citrate which moves to a cyclic form and the iron is bound to the O groups of the carboxylic groups 1 and 3 through ionic bonds, forming two enantiomers, D and L (R and S), both perfectly water-soluble and highly assimilable by the human body. Formula (L) & Formula (D). With a different absorption mechanism from traditional iron molecules, said iron citrate monohydrate is usable in pharmaceutical and / or nutraceutical and / or food compositions, in particular in the treatment and prevention of iron deficiency anemias and in general of all diseases and disorders associated with iron deficiency. The effectiveness is proven by several examples.

A hot work tool steel for high pressure die casting includes the following main components (in wt. %): C 0.28-0.39, Si 0.05-0.35, Mn 0.1-0.8, Cr 5.4-6.0, Ni≤0.3, Mo 1.8-2.5, V 0.6-1.1, balance optional elements, iron and impurities.

The invention relates to a magnetic material comprising at least iron, in metallic form and / or in oxide form, and at least an alumina oxide matrix, the iron content being between 15% and 70% by weight as element iron relative to the total weight of said material, characterized in that said material has a specific surface area greater than 50 m² / g and less than 300 m² / g, said material is in the form of beads or extrudates, and in that said material comprises at most 25% by weight of hematite relative to the total weight of said material.

The present invention relates to an anode active material comprising: natural graphite particles; and elemental iron, elemental silicon, and elemental sulfur present on the surface, inside, or both on the surface and inside the natural graphite particles, wherein the total content of the elemental iron, the elemental silicon, and the elemental sulfur is more than 5 ppm and 100 ppm or less on the basis of the total weight of the natural graphite particles, and the content of the elemental iron is 5-50 ppm on the basis of the total weight of the natural graphite particles.

The application discloses a low-carbon aluminum-silicon casting alloy and a preparation method thereof. By adjusting the proportion of Fe and Mn, the morphology of the iron-rich manganese-rich phase is changed, and then the coarse iron-rich manganese-rich phase is modified by using Co and Sr and other elements to reduce the size of the coarse iron-rich manganese-rich phase, so that the damage to the mechanical properties is reduced. Therefore, the content limit of the harmful element iron can be greatly improved under the premise of ensuring the mechanical properties, and low-carbon, low-cost and high-performance are achieved.

This invention discloses a nano-SiO2 composite iron microsphere toughening agent for cementing, belonging to the technical field of oil and gas cementing engineering materials. The toughening agent is prepared as follows: ferric chloride is added to ethylene glycol and dissolved under stirring at room temperature to form solution A; polyvinylpyrrolidone is added to ethylene glycol and dissolved under stirring at a certain temperature to form solution B, then sodium citrate is added to prepare solution C; tetraethyl orthosilicate is added to deionized water and mixed with solution A to carry out the hydrolysis reaction of tetraethyl orthosilicate, preparing solution D containing nano-SiO2; at a certain temperature, solution D is gradually and slowly added dropwise to solution C to carry out the first redox reaction; after cooling to room temperature, sodium borohydride is added to carry out the second redox reaction; the solution is filtered, washed, and dried to obtain the toughening agent. This invention imparts high toughness and compressive strength to cement stone through the synergistic effect of elemental iron and nano-SiO2, and has broad market prospects.

According to the method for preparing the battery-grade iron phosphate through magnetite and reduction leaching, hydroquinone and ascorbic acid are added into the leaching agent phosphoric acid aqueous solution to serve as a reducing agent together, on one hand, hydroquinone and ascorbic acid have high reducibility, and the phenomenon that the iron source is damaged at the moment when the iron source makes contact with the leaching agent can be avoided; fe < 2 + > released by the magnetite is oxidized into Fe < 3 + > by residual oxygen in the liquid phase, and the reaction path of oxidizing Fe < 2 + > into Fe < 3 + > in the liquid phase is thoroughly blocked, so that the reaction of the elemental iron and the target Fe < 3 + > is promoted; and on the other hand, under the acidic condition, hydroquinone and ascorbic acid can form complexes [Fe (C6H4 (OH) 2)] < 2 + > and [Fe (C6H7O6)] < 2 + > with Fe < 2 + > in a leaching system respectively, the concentration of Fe < 2 + > in a liquid phase is reduced, reaction balance forward movement of ferrous ions released by magnetite is promoted, and the leaching rate of the iron element is greatly increased.

The invention relates to the technical field of soil environment treatment, and discloses a modifier for soil mineralization, salt fixation and plant growth promotion in facility agriculture and application. The modifier comprises the following components: an iron-based mineralizer, a calcium-based mineralizer and a basic resource material and / or a water-retaining porous material. The components of the modifier are mixed with to-be-remediated soil for soil remediation. According to the modifier provided by the invention, the LDH-like natural mineral phase is naturally formed in situ in the soil by supplementing the deficient elements (iron base, calcium base and the like) for forming minerals in the soil, so that the in-situ mineralization fixation ('ion exchange-electrostatic adsorption-lattice embedding 'three-stage fixation path) of salt-based ions is completed, and the natural mineralization rule of the soil is met; the soil salt-based ions are directly and accurately fixed, the soil salinity is reduced, and the soil property is improved.

This invention discloses a denitrification biological packing material based on iron-carbon micro-electrolysis, its preparation method, and its application, belonging to the field of wastewater treatment technology. The invention involves mixing iron powder and activated carbon powder, adding a binder to bind them together into iron-carbon particles; then adding sulfur powder and stirring at the melting point of sulfur to ensure a tight and uniform bond between the sulfur and the iron-carbon particles. After adding the binder, granulation and cooling yield a spherical composite packing material with a microscopic structure of sulfur molecules coating elemental iron and activated carbon. The packing material and related autotrophic bacteria are added to the nitrate wastewater to be treated, forming a coupled denitrification system. This invention introduces an iron-carbon micro-electrolysis reaction, enabling faster and better integrated coupling of anaerobic ammonia oxidation and sulfur autotrophic denitrification, which not only improves the system's denitrification efficiency but also enhances its buffering capacity.

This invention belongs to the field of flow battery energy storage technology, and relates to a negative electrode electrolyte for alkaline all-iron flow batteries and its preparation method. The negative electrode electrolyte is prepared from iron salts, a complexing agent, a promoting component, an alkaline component, an auxiliary electrolyte, and water. The total iron concentration is 0.1–2.0 mol / L, the molar ratio of the complexing agent to the iron salt is 1.5–4, the molar ratio of the promoting component to Fe is 0.05–1.0, the alkaline component concentration is 2.0–6.0 mol / L, and the auxiliary electrolyte concentration is 0–2.0 mol / L. The negative electrode electrolyte of this invention for alkaline all-iron flow batteries has a high total iron concentration, which not only avoids the precipitation of elemental iron during charging and discharging, but also effectively prevents the formation of ferric hydroxide precipitate, improves the stability of iron ions, and greatly extends the cycle life of the negative electrode electrolyte. It can be widely used in aqueous alkaline all-iron flow batteries.

A nonaqueous electrolyte power storage element according to one aspect of the present invention may be charged / discharged or left in an environment of 50°C or higher, and comprises: a positive electrode that has a positive electrode active material containing an iron element; and a nonaqueous electrolyte containing a compound having a fluorosulfonyl group. The content of the compound having a fluorosulfonyl group in the nonaqueous electrolyte is 0.8 mass% or more.

In the ferric iron citrate monohydrate defined by the chemical formula FeC6H6O7 H2O (ferrous citrate monohydrate or ferric iron citrate monohydrate) obtained according to a specific production method, the citric acid and the elemental iron are combined in a molecular complex in which the iron is gathered in the citrate moving into a ring-like form and the iron is bound to the O groups of the carboxyls 1 and 3 through ionic bonds, forming two enantiomers D and L (R and S), both of which are completely water-soluble and highly absorbable by the human body. Formula (L) and Formula (D). With a different absorption mechanism than traditional iron molecules, said ferric iron citrate monohydrate can be used in pharmaceutical compositions and / or nutritional compositions and / or food compositions, in particular for the treatment and prevention of iron deficiency anemia and all diseases and conditions associated with iron deficiency. The effectiveness is demonstrated through several examples.

The present invention relates to a water dispersible granular composition comprising a homogeneous mixture of one or more of water insoluble Magnesium salt, complex or derivatives thereof in the range of 5%-80% w / w of the total composition and one or more of water insoluble Iron salt, complex or derivatives thereof in the range of 1%-50% w / w of the total composition; with at least one agrochemically acceptable excipient; wherein the elemental Iron is present in the range of 0.01% to 50% by weight of the total composition and wherein the elemental Magnesium is present in the range of 0.1% to 50% by weight of the total composition and wherein the composition comprises particles in size range of 0.1micron-30 microns. The present invention relates to a process of preparing the crop nutrition composition and method of treating plants, seeds, crops, plant propagation material, locus, plant parts thereof or soil with the crop nutrition composition.

The present disclosure provides a method for preparing iron phosphate from phosphorus iron slag, the method comprising the following steps: (1) pretreating the phosphorus iron slag to obtain a mixture containing aluminum phosphate; (2) mixing the mixture with a chloride, obtaining a calcined slag by calcination, and then washing and filtering the calcined slag, mixing the calcined slag with an acid solution, and obtaining solution A after reaction and solid-liquid separation; (3) mixing solution A with elemental iron, obtaining solution B after reaction and solid-liquid separation, adding an iron source and / or a phosphorus source to adjust the phosphorus-iron molar ratio to obtain a raw material solution; (4) mixing the raw material solution with hydrogen peroxide, adjusting the pH for reaction, and obtaining iron phosphate dihydrate through solid-liquid separation and sintering treatment. The method can achieve deep removal of Al and Cu impurities, thereby preparing iron phosphate with high purity. The method is simple and low in cost.

The invention belongs to the technical field of metal material preparation, and particularly relates to a magnesium alloy preparation method based on microalloying regulation and control. The method comprises the following steps: designing magnesium alloy components including gadolinium, calcium, zinc, impurity elements including iron, nickel and copper, and the balance of magnesium and inevitable impurities; smelting treatment: smelting magnesium alloy components to obtain an alloy melt; quenching solidification and pretreatment: carrying out quenching solidification treatment on the alloy melt to obtain a cast ingot, and carrying out homogenization pretreatment on the cast ingot to obtain an initial matrix; low-temperature large-deformation heat-force machining is conducted, specifically, the initial base body is cut into an extrusion blank to be subjected to hot extrusion, and an extrusion bar is obtained; and isothermal nanoclustering treatment is conducted, specifically, the extruded bar is placed in an aging furnace to be subjected to isothermal treatment. Through the synergistic effect of the processes, multi-mechanism coupling of grain boundary segregation strengthening, ultra-fine grain strengthening and nanocluster dispersion strengthening is achieved, and the problem that the plasticity, toughness, corrosion resistance and economical efficiency of the magnesium alloy are deteriorated due to traditional macro alloying is effectively solved.

This disclosure provides at least one embodiment of a method for preparing sponge titanium, comprising: pretreating bauxite tailings to obtain a first mixture; acid-treating the first mixture and filtering it to obtain a second mixture; placing the second mixture in a reaction vessel containing an alkaline substance to react, thereby converting ferrous titanate into titanate and ferric oxide or ferrous hydroxide to obtain a third mixture; filtration of the third mixture to obtain a first solid phase and a first liquid phase, and drying and grinding the first solid phase; calcining the dried and ground first solid phase to form elemental iron, and performing magnetic separation to remove the elemental iron; adding an acidic substance to the first liquid phase to react and obtain metatitanic acid colloid, and washing the metatitanic acid colloid; and sequentially subjecting the metatitanic acid colloid to calcination, chlorination, and displacement reactions to obtain sponge titanium. The sponge titanium obtained by this preparation method has high purity.

The invention relates to a preparation method of a solid solution fluoride positive electrode material. The preparation method mainly comprises the following steps: (1) reacting nickel carbonate and elemental iron with a fluosilicic acid solution respectively to obtain respective precursor solutions; (2) uniformly mixing and stirring the respective precursor solutions according to a certain molar ratio, adding deionized water for dilution, adding conductive carbon nanotubes to obtain a mixed solution, and drying to obtain solid powder; and (3) calcining the solid powder at 250 DEG C in a protective atmosphere to obtain the solid solution fluoride. The preparation method of the solid solution fluoride positive electrode material is simple in process and mild in condition, the obtained solid solution fluoride nanoparticles are relatively high in purity, relatively small in particle and relatively high in sodium ion diffusion coefficient, and the electrochemical performance of a sodium ion battery is remarkably improved after the solid solution fluoride nanoparticles are compounded with carbon.

The invention relates to the technical field of adsorption materials, in particular to composite filler and a method for synergistically removing nitrate in underground water based on saw dust and zero-valent iron. Comprising sawdust, nano zero-valent iron, a transforming agent, zero-valent iron, a photocatalyst and a binder, and the transforming agent, the photocatalyst and the zero-valent iron are bonded through the binder; the transforming agent comprises a protein substance, dicyandiamide modified reed biochar and biochar, and the protein substance contains one or more of disulfide bonds and sulfydryl; the photocatalyst is prepared from one or more of a TiO2-based photocatalyst, a Ni-TiO2 bimetallic nano catalyst, g-C3N4, BiVO4, WO3 and boron nitride. The invention aims to provide the preparation method of the composite filler for synergistically removing underground water nitrate based on sawdust and zero-valent iron and the application of the composite filler as an adsorbent to synergistically removing underground water nitrate.

The present invention generally relates to treatment of iron-related conditions with iron carbohydrate complexes. One aspect of the invention is a method of treatment of iron-related conditions with a single unit dosage of at least about 0.6 grams of elemental iron via an iron carbohydrate complex. The method generally employs iron carbohydrate complexes with nearly neutral pH, physiological osmolarity, and stable and non-immunogenic carbohydrate components so as to rapidly administer high single unit doses of iron intravenously to patients in need thereof.

The application discloses a snail-preventing and controlling medicine-fertilizer granule and a preparation method thereof. The snail-preventing and controlling medicine-fertilizer granule comprises ferrous lactate, an attractant, a slow-release material, an additive and the rest of tea dregs. The ferrous lactate and the tea dregs are combined to prevent and control snails, and a synergistic effect is achieved. The problems of water pollution caused by tetraacetaldehyde, the problem of heavy metal enrichment caused by the mixture of EDTA iron sodium and normal phosphoric acid iron, the problem of short medicine effect duration caused by the tea dregs impregnated water solution, and the problem of slow effect and poor prevention and control effect caused by dry tea dregs scattering are overcome. The snail-preventing and controlling medicine-fertilizer granule has the characteristics of super-long prevention and control time and good snail prevention and control effect. The ferrous lactate can provide trace element iron for vegetation in soil. After the tea dregs are fermented in soil, the tea dregs have the effects of improving soil and promoting crop growth, and have the functions of both a fertilizer and a biological pesticide.

This invention discloses a method and system for online reconstruction of mineral phases in high-temperature steel slag, belonging to the field of steel slag resource utilization technology. The method involves crushing coal gangue and room-temperature steel slag to a particle size of 0.5 to 3 mm, mixing them at a mass ratio of 1:0.5 to 1.5 to prepare a reconstruction adjuster, and then adding the reconstruction adjuster and high-temperature liquid steel slag (temperature above 1350℃) to a mixing furnace at a mass ratio of 0.1 to 0.5:1. After settling, the mineral phase reconstruction is completed, converting free calcium oxide into dicalcium silicate and tricalcium silicate, magnesium oxide, ferrous oxide, and manganese oxide into the RO phase, and ferric oxide into ferrous oxide and elemental iron. The mixture after the reaction is cooled to below 500℃, then crushed, magnetically separated, and ground to a specific surface area of ​​400 square meters per kilogram to obtain a cementitious material. This invention utilizes the sensible heat of the high-temperature steel slag itself, eliminating the need for additional heating, achieving high-value utilization of solid waste. The prepared cementitious material exhibits high hydration activity and good volume stability. The process is simple and easy to implement, contributing to the metallurgical industry's achievement of dual-carbon goals.

The present invention relates to a crop nutrition composition in the form of liquid suspension comprising a homogeneous mixture of one or more of water insoluble Magnesium salt, complex or derivative thereof in the range of 1-70% w / w of the total composition and one or more of water insoluble Zinc salt, complex or derivative thereof in the range of 1-50% w / w of the total composition and one or more of water insoluble Iron salt, complex or derivative thereof in the range of 1-50% w / w of the total composition with at least one agrochemically acceptable excipient; wherein elemental Iron is present in the range of 0.01% to 40% w / w of the total composition and wherein elemental Zinc is present in the range of 0.01% to 40% w / w of the total composition and wherein elemental Magnesium is present in the range of 0.01% to 50% w / w of the total composition and wherein the composition comprises of particles in the size range of 0.1 micron-20 microns. The liquid suspension composition is in the form of a suspension concentrate, oil dispersion or a suspo-emulsion. The present invention further relates to a method of treating plants and meeting their nutritional requirement by making essential nutrients like Magnesium, Zinc and Iron available to them and also unlocking other micronutrients and trace elements present in the soil which hitherto were not available because of various factors primarily being soil degradation on account of excessive use of synthetic fertilizers. The present invention also relates to strengthening the plants so as to withstand pest infestation. The present invention also relates to a method of biofortification of plant with essential micronutrients.

The invention discloses a method for preparing ceramsite by using tailings after iron extraction of red mud, which comprises the following steps: 1, separating elemental iron and tailings after iron extraction of red mud: after deep reduction of red mud, melting the red mud raw material at a high temperature of 1500-1700 DEG C, and separating liquid elemental iron and molten tailings; according to the method for preparing the ceramsite from the tailings obtained after iron extraction of the red mud, full-process resource utilization of the red mud from iron extraction to preparation of the ceramsite from the tailings is achieved, the traditional stacking or landfill treatment mode of the tailings obtained after iron extraction of the red mud is changed, a large number of land resources are saved, potential hazards to the environment are avoided, and the method is suitable for industrial production. According to the method, the tailings obtained after iron is extracted from the red mud are converted into ceramsite with economic value, so that the red mud is fully utilized, the pressure of solid waste on the environment is reduced, the comprehensive utilization rate of resources is improved, a benign resource circulation system is formed, and sustainable development is promoted.

This application relates to the field of diamond tool manufacturing technology, and discloses a heat-fatigue-resistant ceramic tile diamond saw blade and its preparation process. The heat-fatigue-resistant ceramic tile diamond saw blade includes a base steel disc and a diamond cutting head welded to its outer edge. The cutting head is made of a mixture comprising: a base matrix powder consisting of 40-50 parts of pre-alloyed copper-nickel alloy powder, 25-35 parts of elemental iron powder, 8-12 parts of elemental cobalt powder, and 13-17 parts of elemental tin powder; 5-10% Invar alloy powder, 1-3% elemental molybdenum powder, and 0.5-1.0% titanium hydride powder added according to the total weight of the base powder; and uncoated single-crystal diamond particles accounting for 15-25% of the total volume of the sintered cutting head. This invention uses a technical solution of pre-alloyed copper-nickel alloy powder combined with Invar alloy powder to adjust the matrix expansion rate, achieving the technical effect of reducing the alternating stress at the interface between diamond and metal binder.