43 results about "Aluminum Oxalate" patented technology

A self-shielding flux-cored welding wire suitable for pipeline steel welding, consisting of a steel strip and flux-core powder, characterized in that the chemical composition and mass percentage of the powder are: 20-26% slagging agent, 10% aluminum oxalate gas-forming agent ~15%, Ge0.4~0.8%, Mn1.2~2.4%, Si0.4~0.8%, Ti0.2~0.4%, Al0.1~0.5%, Ni? 1.0~2.4%, albite 1.0~1.5%, the rest is iron powder, the powder filling rate is 18~22%. The invention provides a flux-cored welding wire for self-protection welding specially used for pipeline steel, which does not generate a large amount of smoke and harmful gas during the welding process, reduces splashing during the welding process, keeps the arc stable and has no obvious pores on the surface, and reduces the risk of melting. The content of nitrogen and oxygen in the pool ensures that the weld metal structure is refined and evenly distributed, and the low-temperature impact toughness is high. The invention is suitable for welding high-strength steel with a certain strength, and can especially meet the field operation requirements of outdoor large-diameter pipeline steel.

The present invention is the aluminum hydroxyoxalate and its preparation process. Aluminum hydroxyoxalate is used as fire retardant, and has molecular expression of Al2(C2O4)(OH)4, and X-ray diffraction spectrum with strong diffraction peaks at D values one 6.5149, 4.7263 and 4.2957 angstrom. Aluminum hydroxyoxalate is prepared through carbonization and decomposition and modification treatment, and through further crystal form controlling treatment, aluminum hydroxyoxalate with high dispersivity and complete crystal form may be obtained. Aluminum hydroxyoxalate has minimum one-dimensional size controlled in 40 nanometers to several microns, extrapolation onset weight-loss temperature higher than 340 deg.c, and weight-loss rate before 500 deg.c up to 51 %. As one kind of green fire retardant, aluminum hydroxyoxalate may be used in thermoplastic plastic and other polymer material with processing temperature over 210 deg.c.

The invention relates to a phase change thermal storage material, and belongs to the technical field of ceramic materials. The material is prepared from the following steps that 1, quartz sand powder,corundum powder, copper oxide and zinc oxide are mixed to be uniform in proportion, compression moulding is conducted, then thermal treatment is conducted to obtain a screening material A; 2, the screening material A, carbon black and aluminum oxalate hydrate are mixed to be uniform in proportion, thermal treatment is conducted, and then an abrasive material B is obtained; 3, corundum particles,the corundum powder, the abrasive material B, an aluminium-silicon alloy and thermosetting phenolic resin are mixed to be uniform in proportion, compression moulding and thermal treatment are conducted, and a finished product is obtained. The phase change thermal storage material has the advantages of being large in thermal storage density, large in coefficient of thermal conductivity, high in compressive strength, high in thermal shock resistance, low in production cost, simple in process and the like.

A high-temperature phase-change heat storage material, which belongs to the technical field of ceramic materials, is prepared according to the following steps: in the first step, quartz sand powder, corundum powder, copper oxide, and zinc oxide are mixed uniformly in proportion, and heat-treated after pressing and forming to obtain sieved Material A; in the second step, the screening material A, carbon black, silicon powder, and aluminum oxalate are mixed evenly according to the proportion, and the grinding material B is obtained after heat treatment; in the third step, the corundum particles, corundum powder, grinding material B, aluminum silicon Alloy, silicon powder, silicon carbide powder, and thermosetting phenolic resin are mixed evenly according to the proportion, and the finished product is obtained after compression molding and heat treatment. The working temperature of the high-temperature phase change heat storage material prepared by this method is greater than 600°C, and it has high heat storage density and thermal conductivity. Large size, high compressive strength, high thermal shock stability, low production cost and simple process.

The invention relates to a preparation method for a ternary composite cathode material for a germanium-coated lithium ion battery. The chemical formula of the cathode material is LiNi1-x-yAlxCoyO2-zFz, wherein x is 0.26 to 0.32, y is 0.18 to 0.22, and z is 0.005 to 0.01. The method comprises the following steps: (1) preparing nickel oxalate, aluminum oxalate and cobalt oxalate into a mixed solution, adding argon into the prepared metal ion solution, stirring, heating, instilling a KOH solution into a stirred reactor very slowly to produce (Ni1-x-yAlxCoy)(OH)2 sedimentation, filtering, washing, and drying so as to obtain a granulous (Ni1-x-yAlxCoy)(OH)2 precursor; (2) respectively weighing the precursor, lithium hydroxide and lithium fluoride, performing ball-milling, drying, and sintering so as to obtain the ternary composite cathode material LiNi1-x-yAlxCoyO2-zFz; (3) obtaining germanium oxide coated LiNi1-x-yAlxCoyO2-zFz through the adoption of germanium sol coating. According to the preparation method for the cathode material, a wet method is adopted to prepare the ternary material precursor so as to obtain higher energy density and material activity; a solid phase sintering method is adopted to dope F in the material to further improve the stability of the material, and finally the germanium coating is adopted to improve the overall performance of the material.

The present invention relates to a preparation method and application of mildew-proof tanning protein filler. Take 42g of collagen powder, add the etherified amino resin and 60g of water obtained in the step into a three-necked flask, adjust the pH of the system to 8-9, and set the pH at 70 Stir and react at ~90°C for 1~2h, then add 1~5g of aluminum oxalate and 1.2~3.4g of substance A, stir and react at 60~80°C for 30min~75min, and vacuum dry to obtain mildew-resistant tanning protein filler. The anti-mildew tanning protein filler is used in the retanning filling process of leather, and the obtained leather has anti-mildew.