279results about How to "Effect on mechanical properties" patented technology

The invention relates to the field of concrete engineering, in particular to a compound capsule underground structure concrete self-repairing system provided with aerobic microorganisms inside. The system comprises a concrete matrix, wherein microorganism compound capsules are arranged in the concrete matrix; and the aerobic microorganisms and culture mediums suitable for the growth of the aerobic microorganisms are coated in the microorganism compound capsules. Compared with the existing microorganism self-repairing system and the microcapsule self-repairing system containing repairing agent, the compound capsule underground structure concrete self-repairing system provided with the aerobic microorganisms inside has no need to be additionally provided with the culture mediums, and concrete can achieve intelligent repairing.

The invention discloses a preparation method of high-melting-point and high-entropy alloy spherical powder based on laser additive manufacturing. The preparation method comprises the steps: randomly selecting powder of five or more from high-melting-point metallic elements including tungsten, titanium, zirconium, hafnium, vanadium, niobium, tantalum and molybdenum, and mixing the powder according to a certain ratio; then, carrying out mechanical alloying by using a high-energy ball mill to obtain single-phase solid solution powder of a high-melting-point and high-entropy alloy; preparing a powder bar material by adopting the forming standard of a hot isostatic pressing process; and finally, preparing laser directly-formed powder by using an electrode induction melting gas atomization process. By using the single-phase solid solution powder of the high-melting-point and high-entropy alloy, formed by using the preparation method, a series of problems of different burnout rates of different elements due to relatively high difference as well as component microscopic segregation and negative eutectic and the like caused by various elements in the laser additive manufacturing and forming processes of the powder of the high-melting-point metallic elements can be solved, and the rapid and precise manufacture of high-temperature-resistant and wear-resistant parts special for the aerospace and hot end parts of high-performance turbine engines can be more effectively realized.

The invention relates to a composite drug stent and a preparation method thereof. The stent includes a stent body and active drugs; wherein, the stent body is a perforated medical material with good biocompatibility, which can be made by optionally using stainless steel, cobalt-based alloy, titanium alloy, nickel-titanium alloy, or polylactic acid bio-polymer material; the active drugs include special endothelial progenitor cell antibody drug and anti-smooth muscle cell proliferation drug. The internal surface of the perforated stent body is fixedly provided with the special endothelial cell antibody drug, while the external surface of the perforated stent body is coated with the anti-smooth muscle cell proliferation drug. The preparation method includes as follows: (1) pretreating the surface of the stent body; (2) making holes; (3) post-treating the surface of the stent body; (4) dispensing medicines; (5) coating the external surface; (6) fixing the internal surface; (7) drying at low temperature. The preparation method can selectively absorb endothelial progenitor cells and facilitate in repairing endodermis, and can effectively inhibit the proliferation and migration of vascular smooth muscle cells, persistently and effectively reduce the newborn endangium, effectively prevent the stent from narrowing, and avoid the risk of tardive thrombosis.

A scaffold of the granular anticancer medicine for treating the benign or malignant stenosis of esophagus and digestive tract is disclosed, which has 4 structures consisting of scaffold, granular anticancer medicine, selective coated film on the surface of scaffold, and selective external protective layer.

The invention discloses a wall thickness linear model-based pipe mechanical property hydro-bugling testing method, to solve the problems that the conventional pipe mechanical property hydro-bugling testing method is difficult to measure pipe wall thickness and discontinuous in experiment. The method comprises the following steps of: firstly, testing the initial wall thickness, the outer radius and the bulging area length of the pipe to be tested; secondly, putting the pipe to be tested between an upper die and a lower die, and sealing two ends of the pipe to be tested; thirdly, filling a high-pressure liquid medium into the pipe to be tested; fourthly, recording the pressure and the bulging height of the high-pressure liquid medium in the bulging process of the pipe to be tested in real time till the pipe to be tested is cracked; fifthly, measuring the wall thickness of a crack point of the pipe to be tested, and calculating and obtaining the wall thickness of each moment in the bulging process according to the wall thickness linear model; and sixthly, calculating and obtaining an equivalent stress stain curve of the pipe. The method is applied to pipe mechanical property hydro-bugling testing.

The invention provides a fabricated shear wall and an assembly method thereof, and belongs to the technical field of prefabrication and construction of a prefabricated concrete structure, wherein the fabricated shear wall is used for solving the problems that a traditional fabricated shear wall is complicated in assembly and assembly quality is difficult to detect. The fabricated shear wall comprises at least one lower layer fabricated shear wall board and at least one upper layer fabricated shear wall board. Multiple steel bar connecting bolts are embedded in the upper end of the lower layer fabricated shear wall board, multiple bolt holes corresponding to the steel bar connecting bolts are formed in the lower end of the upper layer fabricated shear wall board, each steel bar connecting bolt is inserted in each bolt hole in a penetrated mode and is connected through a nut in a fastened mode, and each bolt hole is communicated with a mounting hole. By the adoption of the fabricated shear wall and the assembly method of the fabricated shear wall, the construction process can be simplified, assembly quality can be improved, mechanical properties of the shear wall after assembly can be improved, and thus cost is reduced.

The invention relates to a polyethylene of raised temperature resistance (PE-RT) master batch and a preparation method thereof. At present, petroleum chemical enterprises in China do not produce polyethylene of raised temperature resistance (PE-RT) materials, so matched master batches need to be imported, but the price is high. The invention has the technical scheme that the PE-RT master batch comprises 20 to 30 percent of substrate rein, 3 to 5 percent of nanometer montmorillonite, 7 to 15 percent of dispersing agents, 0.3 to 1 percent of resistance cross linking agents, 0.5 to 2 percent of polysiloxane organic silicon surface active agents, 1 to 3 percent of antioxidants, 1 to 3 percent of light stabilizers and 20 to 70 percents of pigment, wherein the resistance cross linking agents are dimethyl sulfoxide, dimethylamine or dimethylformamide, and the dispersing agents are compounds of low molecular polyethlene wax or ethylene-vinyl acetate wax and fluoropolymers. After the PE-RT is proportionally mixed, PE-RT pipelines in various colors can be manufactured, and the improvement of the mechanical property of the PE-RT pipelines instead of reduction is ensured.

The embodiment of the invention provides a brake control method and system of a wind generating set. The brake control method comprises the steps that according to information of failures of a power grid, the wind generating set is subject to brake load reduction control, and the brake load reduction control comprises the steps that a pitch system of the wind generating set is controlled to execute feathering according to the preset maximum feathering speed, and a converter of the wind generating set is controlled to execute the preset maximum torque set. According to the technical scheme, theshutdown load of the wind generating set can be effectively reduced, the wind generating set can be safely shut down, the influence on the mechanical property of the wind generating set can be avoided, the mechanical service life of the wind generating set is ensured, and long-term safety running of the wind generating set can be ensured.

The present invention relates to an aftertreatment method of plasma spray-coated hydroxypatite coating, and is characterized by that the hydroxyapatite coating product obtained by adopting plasma spray-wating process is placed in a container connected with the steam generator, then said steam in the container is heated or (and) pressurized to make the hydroxyapatite coating product undergo the process of treatment for 2-6 hr. under the moist steam whose temp. is 100 deg.C-300 deg.C and pressure is 1-3 atms, then said hydroxyapatite coating product can be taken out and placed into the baking oven with 100-150 deg.C and baked for 0.5-2 hr. so as to implement its aftertreatment.

The invention relates to a preparation method of self-lubricating ceramic cutting tool material comprising spherical nanometer silicon dioxide coated hexagonal boron nitride composite powder. The self-lubricating ceramic cutting tool material comprises the following raw material components in percentage by volume: 15-75% of TiC, 2-20% of h-BN@SiO2, 0.2-2.5% of MgO and the balance of Al2O3, wherein the h-BN@SiO2 is the spherical silicon dioxide coated hexagonal boron nitride composite powder which is obtained by dispersing h-BN powder in absolute ethyl alcohol and dropwise adding tetraethyl orthosilicate at the temperature of 30-70 DEG C. The invention also provides the preparation method of the self-lubricating ceramic cutting tool material. The added h-BN@SiO2 can improve the wettability of h-BN@SiO2 and a matrix and the mechanical property of the cutting tool material when the excellent lubricating property of the cutting tool material is remained, and reduce the agglomeration of air holes and the h-BN@SiO2 and the negative influence of the added h-BN on the mechanical property of the self-lubricating ceramic cutting tool material. The self-lubricating ceramic cutting tool material is suitable for application in manufacturing of self-lubricating ceramic cutting tools and can also be used for manufacturing ceramic molds, bearings and other wear-resisting anti-corrosion components and parts.

The invention provides a TiNiAg memory alloy with the antibacterial function and a preparation method thereof. The TiNiAg memory alloy contains 20%-80% of nickel, 0.1%-10% of silver and the balance of titanium by atomic percent. The alloy not only has good shape memory effect and superelasticity, but also has good matching of mechanical properties. Simultaneously, the alloy material has good corrosion resistance and biocompatibility in simulated body fluid, and cytotoxicity is in the same level of a TiNi alloy. In addition, the alloy material has a broad antimicrobial spectrum and can well inhibit Staphylococcus aureus, Escherichia coli, Staphylococcus epidermidis and other gram-negative and positive bacteria.

The invention relates to a preparation method of a molecular sieve coating material on the surface of porous silicon carbide ceramic with the surface rich in silicon, and the molecular sieve coating material is prepared by using the porous silicon carbide ceramic with the surface rich in silicon as a carrier; using solid materials, such as silicon blocks, quartz, sliicon-alumininm composite oxide sintering powder with adjustable sliicon-alumininm atomic ratio, and the like as a silicon source or a sliicon-alumininm source, and adopting a in situ hydrothermally synthesizing method. Molecular sieve crystals preferentially nucleate on the surface of the porous silicon carbide ceramic due to a surface silicon layer of the porous silicon carbide ceramic, the solid silicon source or the sliicon-alumininm source are used so that the release speed of the silicon source or sliicon-alumininm source for the growth of crystal nucleus is controllable. Therefore, prepared molecular sieve coating is uniformly loaded on the surface of the silicon carbide ceramic carrier; the composite material formed by a molecular sieve and the porous silicon carbide ceramic has a unique micropore / macropore structure; chemical combination is realized between the molecular sieve and the porous silicon carbide ceramic, and the molecular sieve and the porous silicon carbide ceramic have high interface combination strength. The preparation method has simple technology, convenient operation without complex equipment and low manufacturing cost and is more suitable for industrialized and mass production.

The invention relates to a biologic polypeptide medicine blood vessel support and a preparation method thereof. The biologic polypeptide medicine blood vessel support comprises a support body and active medicines. The support body which is medical material with pores and good biocompatibility is made from stainless steel, cobalt-base alloy, titanium alloy, nickel-titanium alloy or polylactic acid biopolymer; the active medicines comprise a biologic polypeptide medicine and a smooth muscle cell proliferation inhibition medicine. The support is characterized in that: the support body with the pores has the biologic polypeptide medicine fixed on the internal surface of the body and the smooth muscle cell proliferation inhibition medicine coated on the external surface of the body. The preparation me(3) carrying out the after-treatment of the surface of the support body; (4) preparing the medicines; (5) coating the external surface; (6) fixing the medicine onto the internal surface; (7) carrying out the process step of low temperature drying. The support can selectively absorb endothelium progenitor cells which quickly differentiate into endothelium cells to promote the restoration of the endothelium after the support is built in; the support can also effectively inhibit the proliferation and migration of vascular smooth muscle cells, persistently and effectively reduce the formation of a new inner membrane, effectively prevent restenosis inside the support, and avoid the risk of potentially fatal late thrombosis.

The invention provides an eliminating method for a brittle phase in a laser-repaired nickel-base high temperature alloy, and belongs to the technical field of metal material heat treatment. The eliminating method comprises the steps that the laser-repaired nickel-base high temperature alloy is sequentially subjected to delta aging treatment and delta solution treatment, wherein the temperature ofdelta aging treatment is 850-970 DEG C, and the temperature of delta solution treatment is 1015-1035 DEG C. In the method, delta aging treatment is carried out on the laser-repaired nickel-base high temperature alloy at first, and the Laves brittle phase is eliminated; and then delta solution treatment is carried out at the temperature of 1015-1035 DEG C for eliminating the delta phase separated out in the previous step. Since the temperature of delta solution treatment is lower than the solution temperature for eliminating the Laves phase in conventional heat treatment, damage caused by hightemperature solution on the alloy structure and the mechanical property can be avoided, and the mechanical property of the nickel-base high temperature alloy is obviously improved along with eliminating of the Laves phase.

The invention relates to the technical field of cable materials, and in particular relates to a flame-retardant thermoplastic polyurethane (TPU) cable sheathing material with an electromagnetic shielding function and a preparation method of the TPU cable sheathing material. The TPU cable sheathing material comprises the following raw materials in parts by weight: 25-85 parts of thermoplastic polyurethane, 5-45 parts of graphene, 5-35 parts of a flame retardant, 0.5-5 parts of a compatibilizer, and 0.02-0.1 part of an antioxidant. The TPU cable sheathing material provided by the invention has the electromagnetic shielding function, the shielding effectiveness (SE) value can reach 17-50 db, and the flame-retardant effect is excellent; and a single vertical burning test can reach a V0 level,the strength is high, the tensile strength can reach 25.2 MPa or more, the flexibility is good, the elongation at break is high and can reach 405% or more, and the mechanical properties are excellent.

A preparation method for a reaction-type halogen-containing flame-retardant polyether polyol belongs to the field of organic synthesis. The preparation method comprises: initiating a ring-opening polymerization reaction of chloropropylene oxide by a bromine-containing dihydric alcohol / phenol initiator under the effect of a catalyst, to prepare a bifunctionalpolyepichlorohydrin; reacting bifunctionalpolyepichlorohydrin with a strong alkali solution to remove partial chlorine atoms and further to obtain an epoxy-terminated compound; under the effect of an acidic catalyst, in the presence of water and an organic solvent, performing a hydrolysis reaction on the epoxy-terminated compound to obtain a multi-functional halogen-containing flame-retardant polyether polyol solution; performing reduced pressure distillation on the polyether polyol solution to obtain the product halogen-containing flame-retardant polyether polyol. The method has the advantages of cheap and easily available raw materials, a simple and controllable reaction and a yield of 95% or more; the prepared reaction-type halogen-containing flame-retardant polyether polyol is moderate in viscosity, and good in compatibility with foaming agents or other auxiliary agents; a combined material by using the polyether polyol is uniform, transparent, excellent in fluidity and good in stability.

The invention discloses a titanium-based ultrafine grain or fine grain composite material with high compression ratio strength and a preparation method thereof. In a microstructure of the titanium-based ultrafine grain composite material, Hcp Ti3O is taken as a matrix phase and Hcp Ti as an enhanced phase; and in a microstructure of the titanium-based fine grain composite material, Hcp Ti is taken as the matrix phase and Hcp Ti3O as the enhanced phase. The preparation method comprises the following steps of: interruptedly exposing powder in the air until the initial powder becomes amorphous state titanium alloy powder by a high-energy ball; and quickly sintering by adopting pulse current at the sintering temperature Ts being not less than 740K and not more than 1,473K and the sintering pressure of at least 40MPa for 1-10 minutes. The method has simple process and convenient operation; grains have controllable size, high finished rate, raw materials saving and near net shape; and the large-sized titanium-based ultrafine grain or fine grain composite material has excellent comprehensive mechanical property and favorable popularization and application prospect.

The invention discloses air flame-retardant air filter paper which comprises raw paper and an imprgnant for impregnating the raw paper, wherein the raw paper comprises glass fibers, cotton linter pulp treated by alkali, polylactic acid fibers, a defoaming agent, a dispersant,a wet strength agent, a water-proofing agent and a brightening agent; the imprgnant comprises phenolic resin, styrene-acrylic emulsion, normal hexane, methanol, N-hydroxymethyl acrylamide, a wetting agent, a flame retardant N, N '-piperazinetetra(phenol) phosphoramidate and a flame retardant decabromodiphenyl ethane. The invention further discloses a preparation method for the flame-retardant air filter paper. The air filter paper prepared by the preparation method is remarkable, high and lasting in flame retardant efficiency, has no great effect on the mechanical performance of the filter paper, and can be widely applied to the field of engines.

The invention discloses a self-lubricating ceramic composite material with a biomimetic structure and a preparation method thereof. The composite material has a structure which is alternately laminated by ceramic layers and lubricating layers, wherein the ceramic layer is ZrO2, Al2O3, or ZrO2-Al2O3, and the lubricating layer is made of graphite, molybdenum disulfide, or hexagonal boron nitride. The composite material has excellent friction and abrasion performance.

The invention discloses a production process suitable for a high-strength round link chain under a marine environment. The production process comprises the following steps of steel inspection, preparing for materials, blanking, chaining, welding, correcting, first repair, thermal treatment, experiment load testing, second repair, physical rust removal, surface anticorrosion treatment and delivery inspection. The surface anticorrosion treatment is realized by Dacromet treatment after zinc impregnation, so that the anticorrosion of a product is greatly improved; and due to the combination of two anticorrosion treatment ways, the anticorrosion of the chain is greatly improved.

The invention discloses a reaction type polysiloxane flame-retardant coating and a preparation method thereof, and belongs to the technical field of flame-retardant coatings. The reaction type polysiloxane flame-retardant coating consists of a silane coupling agent, ammonium polyphosphate, a film-forming agent, a polysiloxane flame retardant, a wetting agent and ethanol. The film-forming agent and the silane coupling agent of the reaction type polysiloxane flame-retardant coating have the function of film forming simultaneously, the silane coupling agent and the synthesized polysiloxane flame retardant can be also acted with each other, and the silane coupling agent and the flame retardant can implement microencapsulation on the ammonium polyphosphate, and can be also reacted, so that the reaction type polysiloxane flame-retardant coating of a spatial cross-linked net structure can be prepared, the coating adopts ethanol as a solvent, and the raw materials of the whole system are environmental-friendly reagents which can do no harm to the environment and operators; the coating is a reaction type coating, is high in flame retardancy efficiency, and can be deformed together with a substrate without dropping, the limit oxygen index LOI of polypropylene can be up to 31.3% and can be qualified in UL-94 V0 tests, and the mechanical property of the substrate can be barely affected.

Belonging to the field of organic-inorganic hybrid materials, the invention provides a quaternary ammonium cation and quaternary phosphonium cation-containing organic cation modified clay, its preparation method and application. The preparation method comprises: reacting a suspending solution of a sodium base treated clay mineral with quaternary ammonium cations and quaternary phosphonium cations, conducting filtering, washing, drying and crushing, thus obtaining the quaternary ammonium cation and quaternary phosphonium cation-containing organic cation modified clay with a synergistic effect. The organic cation modified clay provided in the invention has good stability, excellent weather resistance, and no toxicity. The organic cation modified clay contains quaternary ammonium cation modified clay and quaternary phosphonium cation modified clay simultaneously, and shows a synergistic antibacterial activity, so that it can be applied to plastics, rubber, fibers, coatings, adhesives, paper, wood-plastic composite materials and a variety of polymer materials to improve the antibacterial property, the flame retardance and the barrier property of polymers, and has no influence on the mechanical properties of the polymers.

The present invention relates to the heat treatment process of wrought Mg-Zn-Mn alloy, and features that the heat treatment process includes the following steps: solid dissolving of the extrusion formed alloy material at 400-440 deg.c for 2-4 hr and water quenching to room temperature, heating to 90 deg.c and maintaining for 16-24 hr, further heating to 180 deg.c and maintaining for 12-16 hr, and air cooling to room temperature. The wrought Mg-Zn-Mn alloy through the said heat treatment has greatly raised strength and toughness and wide application range.

A VOC extractant used for modified polypropylene, and a preparing method and applications thereof are disclosed. The VOC extractant includes 11-50 wt% of a polypropylene carrier and 50-89 wt% of a non-fluorine type nonionic surfactant solution. The non-fluorine type nonionic surfactant solution includes 0.1-2.5 wt% of a non-fluorine type nonionic surfactant and 97.5-99.9 wt% of a solvent. The VOCextractant has characteristics of capabilities of being safe, environmentally friendly, cheap, and the like, and has an extremely high removal rate for VOCs in a modified polypropylene material. In aprocess of preparing the environmentally friendly modified polypropylene material, the VOC extractant is mixed with polypropylene and an auxiliary agent, the mixture is fully stirred by an efficient material mixer, and then the mixture is subjected to twin-screw extrusion and granulation to obtain the environmentally friendly modified polypropylene material.

The invention discloses a method for assisting a laser cladding process by virtue of a static magnetic field, and belongs to the technical field of material surface modification. According to the method, a static magnetic field generation device is matched with laser cladding equipment, an excitation current is adjusted to obtain the static magnetic field with a corresponding intensity, and the static magnetic field acts on the two sides of a laser cladding pool, thus achieving the purposes of improving the microscopic structure of a cladding layer, uniformizing the chemical ingredients of the structure and improving the comprehensive performance of the cladding layer. The convection state and crystallization behaviour of a melt in the laser cladding pool are improved by externally adding the static magnetic field, and flexible regulation and control for the solidified organization of the laser cladding layer are finally realized, so that a part of columnar crystals and dendritic crystals of the coating structure are transformed to small isometric crystals, thus optimizing the comprehensive performances of the microscopic structure and the coating of the laser cladding layer to a certain extent.

The invention discloses a method for terminal vinyl silicone rubber cold curing with the operation time controllable. The method can precisely regulate and control the operation time of silicon rubber cold curing; the operation time endures from several minutes to several hours, and the design of the curing process is greatly facilitated. The method includes the following steps: (1) preparation of composition A; (2) preparation of composition B: toluene solution with 0.2-0.4 weight percent of platinum complex co ordinative with platiniferous vinyl siloxanes is prepared; (3) the toluene solution with 0.2-0.4 weight percent of platinum complex is taken out, tetravinyl tetramethyl cyelo tetrasiloxane is added into the solution, and component B is obtained under low storage temperature, wherein, the tetravinyl tetramethyl cyelo tetrasiloxane is inhibitor, the addition is 0.2-1.2 times of the mass of the toluene solution with 0.2-0.4 weight percent of platinum complex taken out; by regulating the dosage, the silicon rubber cold curing method with controllable operation time can be achieved.

The invention provides a matte TPO skin material with low processing viscosity as well as a preparation method and application of the TPO skin material. The TPO skin material is formed by filling a thermoplastic polyolefin (TPO) with nanoparticles, wherein the mass ratio of the TPO to the nanoparticles is (90-99.5):(0.5-10); and the nanoparticles include one or more selected from the group consisting of multi-layer graphene, carbon nanotubes, monodisperse polystyrene microspheres, manganese oxide nanowires, iron tetroxide nanoparticles, fumed silica, and nano carbon black particles. The nanoparticles are packed in the TPO, so that the free volume of the polymer is increased, and the density of entanglement points is reduced; at the same time, interface slip occurs between the nanoparticlesand the polymer, the interface slip acts as a lubricant to reduce the viscosity of the system, so that the process temperature of operation such as mixing, calendaring and extrusion in the material processing process is reduced; the nanoparticles play a matting effect; the added nanoparticles have little effect on the mechanical properties of the material and improves the friction-resistant coefficient; and the TPO skin material provides guidance for industrial production.

The invention relates to a bamboo fiber and corn fiber blending shirt and a manufacturing method thereof, belonging to the technical field of weaving. The bamboo fiber and corn fiber blending shirt is formed by blending 65-80 percent of bamboo fiber and 20-35 percent of corn fiber into yarns and then carrying out printing and dyeing, weaving, posterior-treatment and cutting processes; the color fastness of the bamboo fiber and corn fiber blending shirt can reach 3-4 grade, and the formaldehyde content is less than or equal to 75.0mg / kg. The shirt has the characteristics of low corn fiber content, strong intensity, good draping property, good crease resistance and high color fastness.

The invention relates to a sulfur-group lead-compound thermoelectric material and a preparation method thereof. The chemical formula of the sulfur-group lead-compound thermoelectric material is Pb(1-x)Sb(2x / 3)Se, wherein the x is larger than 0 and is less than 0.09. According to the preparation method, a high-purity simple substance is used as a raw material; batching is carried out based on a stoichiometric ratio in the chemical formula; after vacuum packaging, high-temperature melting, and annealing heat treatment are carried out, grinding is carried out to obtain powder; vacuum hot pressing sintering and slow cooling are carried out to obtain a sheet type block material that is a lead selenide material based on target components. A controllable preparation method of forming a dislocation structure by introducing a Pb positive ion vacancy structure is designed; and because a high-density transgranular dislocation structure is introduced into the material, intermediate-frequency phonons can be scattered effectively, so that the lattic thermal conductivity, less than 0.4W / m-K, of the material, can be reduced substantially. According to the prepared novel high-performance thermoelectric material based on Pb(1-x)Sb(2x / 3)Se, the zT value reaches 1.6 on the condition of 900K, wherein the zT value is a highest value of the existing PbSe system terminal. Therefore, the sulfur-group lead-compound thermoelectric material is a novel thermoelectric material with great large-scale application potential.

The invention discloses an oscillating arm type strong grinding mill. A grinding roller device and a grinding ring of a host grinding mill are arranged in a host grinding mill shell; the grinding roller device is installed on a host spindle; the grinding roller device comprises grinding roller racks, oscillating arms, grinding rollers, grinding roller shafts, grinding roller shaft pushing racks and thrust mechanisms; the inner ends of the oscillating arms are hinged in grinding roller rack ring slots; the outer ends of the oscillating arms extend out of the grinding roller racks; the grinding roller shafts are arranged on the ring slot holes of the oscillating arm extending ends; the upper ends and the lower ends of the grinding roller shafts are arranged in radial slots arranged on the top and the bottom of the ring slot in a sliding fit mode; the grinding roller shaft pushing racks for pushing the grinding roller shafts are arranged in oscillating arm ring slots in a sliding mode; the thrust mechanisms for generating radial thrust to the grinding roller shaft pushing racks are arranged on the bottoms of the oscillating arm ring slots; and the grinding rollers are arranged in the grinding roller shaft pushing racks and are installed on the grinding roller shafts by bearings. According to the oscillating arm type strong grinding mill disclosed by the invention, the thrust mechanisms are adopted to apply additional thrust on the grinding rollers in addition to centrifugal force, and grinding force on the material by the grinding rollers is increased so as to obtain better crushing effect and improve the yield.