The invention relates to a sagger for calcining a battery material and a preparation method thereof, and belongs to the technical field of lithium batteries. The sagger comprises the following raw materials in parts by weight: 10-50 parts of cordierite with a particle size of 2 to 1, 10-40 parts of cordierite with a particle size of 1 to 0, 1-20 parts of 200-mesh cordierite fine powder, 1-25 parts of 325-mesh fused magnesia-alumina spinel fine powder, 1-5 parts of sintering-promoting micro powder, 1-30 part of clay and 0.1-2 parts of an organic binding agent. The sagger uses the sintering-promoting micro powder, the sintering-promoting micro powder comprises of a plurality of kinds of lithium fine powder, and has low melting point and small thermal expansion coefficient so as to reduce the firing temperature of the saggar; and a roller kiln is used for firing, after forming, the saggar is spread out and put into the roller kiln for sintering, after the firing, the bottom flatness effect of the sagger is better than that of the sagger which is sintered by vertically placed in a shuttle kiln, and a fully automated assembly line production mode of a user can be met.

Sagger for calcining battery material and preparation method thereof

The invention relates to a sintering supporting body which is prepared from mullite, aluminum powder, activated alumina, kaolin, quartz, cordierite, magnesite powder, talcum powder, dextrin, lithium manganate, lithium iron phosphate, lithium cobaltate and a micropore agent The invention is characterized in that the sintering supporting body is prepared from the following components in parts by weight: 10-25 parts of mullite, 15-30 parts of aluminum powder, 5-15 parts of kaolin, 15-20 parts of cordierite, 3-8 parts of magnesite powder, 3-10 parts of talcum powder, 2-8 parts of activated alumina, 30-50 parts of quartz, 6-12 parts of dextrin, 2-5 parts of lithium manganate, 2-5 parts of lithium iron phosphate, 3-8 parts of lithium cobaltate and 10-15 parts of micropore agent The sintering supporting body has the advantages of simple processing technique, accessible raw materials and long service life, and the number of repeated uses can reach 50 or above The sintering supporting body has high thermal shock resistance, and can not influence the chemical reaction and crystallization recombination of the sintered substance in the sintering process The sintering supporting body also has the advantages of high corrosion resistance, environment friendliness, high safety, high strength and low breaking and powder shedding tendency, and can be widely used as a supporting body in the sintering process

Sintering supporting body and manufacturing method thereof

The invention relates to a cordierite sagger with a corrosion resistant substrate and a preparation method thereof. The preparation method comprises the steps of adopting 60-75wt% of zirconium oxide and 25-40wt% of vanadium pentoxide as raw materials, adding polyvinyl acetate solution, performing ball-milling and pelleting to obtain powder material; mixing 30-55wt% of alumina powder, 30-40wt% of powder material, 10-20wt% of magnesium oxide and 5-10wt% of binger, obtaining substrate mixture; mixing 45-65wt% of cordierite aggregate, 15-20wt% of cordierite fine powder, 10-20wt% of alumina micro-powder and 10-20wt% of Suzhou soil, adding alkaline pulp waste liquor, mixing the mixture uniformly, and molding the mixture to obtain a sagger matrix; distributing a layer of substrate mixture on thebottom work surface of the sagger matrix, pressing the substrate mixture layer with a machine, drying, keeping warm for 8-10h at a temperature range from 1370 to 1390 degrees centigrade, obtaining a cordierite sagger with a corrosion resistant substrate. The cordierite sagger provided by the invention has the advantages of low cost, energy conservation, environmental protection, excellent corrosion resistance and thermal shock stability and long service life.

Cordierite sagger with corrosion resistant substrate and preparation method thereof

The invention relates to a sagger for roasting a positive electrode material of a lithium ion battery and a production method thereof. According to a technical scheme, the production method comprisesthe following steps: according to the SiO2 content of 45-54wt%, the Al2O3 content of 32-40wt% and the MgO content of 10-15wt%, mixing magnesite, kaolin and quartz sand to obtain a mixture; then addinga zirconium oxide sol according to an amount of 40-50wt% of the mixture, performing ball milling for 3-5h, and performing spray granulation to obtain powder; with 55-70wt% of calcium hexaaluminate aggregate and 30-45wt% of the powder as raw materials, adding a bonding agent according to an amount of 5-7wt% of the raw materials, uniformly mixing, moulding to obtain a sagger matrix, drying, and preserving heat at 1370-1400 DEG C for 8-10h to obtain the sagger for roasting the positive electrode material of the lithium ion battery. By the production method, the production cost is low, energy issaved, environment friendliness is achieved, and the produced sagger for roasting the positive electrode material of the lithium ion battery has excellent erosion resistance and a long service life.

Sagger for roasting positive electrode material of lithium ion battery and production method thereof

The invention provides a lithium battery special high-cycle special ceramic crucible. The crucible comprises a surface working layer and a substrate layer, wherein raw materials of the surface workinglayer comprise kaolin, white corundum, alumina micro powder, fused mullite, a bonder, spodumene powder, cordierite and water; raw materials of the substrate layer comprise sintered mullite, kaolin, alumina micro powder, magnesium carbonate, cordierite, talcum, fused magnesium aluminate spinel, andalusite, a bonder and water. The invention further provides a preparation method of the crucible. Thecrucible has the advantages that the surface working layer adopts corrosion-resistant material fine particles as main materials, the substrate layer adopts a high-temperature-resistant material withsmall heat expansion coefficient as a main material, bottom peeling and material sticking time are slowed down, side and bottom crack phenomenon is solved, a crucible green body has certain strength,the green body is put into a kiln again to be sintered after being dried, the bottom flatness of the sintered crucible is better than that of other crucibles sintered in kilns, and production in a fully automatic flow line mode required by users can be met.

Lithium battery special high-cycle special ceramic crucible and preparation method thereof

The invention relates to a lithium battery high-temperature corrosion resistance laminar saggar and a preparation method thereof The lithium battery high-temperature corrosion resistance laminar saggar is of an integrated structure mainly formed by a saggar wall and a saggar bottom face, and is characterized in that the saggar bottom face comprises a saggar base layer, a middle layer and a surface layer; the middle layer is located between the base layer and the surface layer; the saggar base layer is made of, by mass, 60-70% of cordierite, 20-30% of mullite and 1-10% of micro powder; the micro powder is one of andalusite and silllimanite or a mixture of the andalusite and the silllimanite by any ratio; the surface layer is made of MgO or ZrO2 or BeO; the middle transition layer is made of forsterite or zirconite or BeSiO3; and the saggar base layer, the middle layer and the surface layer are totally pressed through a dry pressing forming process to form a green body, reaction and sintering are conducted under the air atmosphere at a high temperature, and the lithium battery high-temperature corrosion resistance laminar saggar is obtained The saggar prepared by the method has the good thermal stability and erosion resistance

Zhang Jian

Papers

Lithium battery high-temperature corrosion resistance laminar saggar and preparation method thereof