CN108484188A - A kind of silicon carbide sagger and preparation method thereof for anode material of lithium battery roasting - Google Patents

A kind of silicon carbide sagger and preparation method thereof for anode material of lithium battery roasting Download PDF

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Publication number
CN108484188A
CN108484188A CN201810424427.2A CN201810424427A CN108484188A CN 108484188 A CN108484188 A CN 108484188A CN 201810424427 A CN201810424427 A CN 201810424427A CN 108484188 A CN108484188 A CN 108484188A
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silicon carbide
lithium battery
anode material
preparation
roasting
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CN108484188B (en
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向若飞
李远兵
李淑静
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Wuhan University of Science and Engineering WUSE
Wuhan University of Science and Technology WHUST
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Wuhan University of Science and Engineering WUSE
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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Abstract

The present invention relates to a kind of silicon carbide saggers and preparation method thereof for anode material of lithium battery roasting.Technical solution is：Using the Suzhou soil of the alumina powder of 40~55wt%, the zircon of 30~40wt% and 10~20wt% as mixture, the water of the vanadic anhydride and 5~8wt% of additional 4~6wt% of mixture, mixing obtains working lining mixture.Using the Suzhou soil of the talcum of 30~45wt%, the alumina powder of 10~20wt% and 40~50wt% as substrate material, adds water, ball milling to dry, be crushed, obtain matrix powder.Using the matrix powder of the carborundum aggregate of 60~75wt% and 25~40wt% as raw material, the bonding agent of additional 5~10wt% of raw material, mixing, molding；Saggar base bottom work one layer of working lining mixture of EDS maps after shaping, machine pressure are dry；8~10h is kept the temperature in 1370~1400 DEG C, the silicon carbide sagger roasted for anode material of lithium battery is made.At low cost and energy conservation and environmental protection of the invention, made product good thermal shock stability, erosion-resisting characteristics be excellent and long lifespan.

Description

A kind of silicon carbide sagger and preparation method thereof for anode material of lithium battery roasting
Technical field
The invention belongs to saggar technical fields.More particularly to a kind of silicon carbide sagger for anode material of lithium battery roasting And preparation method thereof.
Background technology
Lithium ion battery is new generation of green environment-friendly battery, is widely used in mobile communication, military affairs, aerospace and information Scientific domain.Anode material for lithium-ion batteries is the pith for constituting lithium ion battery, in actual production, high temperature process heat Method because it is simple for process and it is low for equipment requirements be the main method for preparing anode material for lithium-ion batteries.It is that required raw material is straight It connects and is mixed in solid form by modes such as mechanical agitation, ball milling or tablettings, through high-temperature roasting, cooling and the techniques such as broken, most After obtain required product.Container containing of the saggar as raw material in high-temperature calcination process, just to anode material for lithium-ion batteries Often production plays a crucial role, and as lithium battery material demand increasingly increases, the development trend in high voltage direction is right The performance of saggar especially thermal shock resistance and corrosion resistance propose harsher requirement.
It is " circulating anode material of lithium battery baking sagger and preparation method thereof " (ZL201310194571.9) and " a kind of Saggar and preparation method thereof with anti-lithium battery high temperature corrosion coating " (CN201610159837.X) patented technology, leads to respectively Compression moulding and impregnation technology are crossed, the working lining with erosion-resisting characteristics is formed on saggar surface, improves the anti-erosion of saggar Ability, but the bond strength of working lining and saggar matrix is limited, and binding site is easily cracking during use." zirconium mullite Saggar " (ZL201410189300.9) patented technology is the side that raw material prepares saggar with mullite, plate diamond spar and zircon sand etc. The thermal shock resistance of method, saggar is excellent, but expensive starting materials, and firing temperature is excessively high, is unfavorable for mass producing.
Invention content
The present invention is directed to overcome prior art defect, it is therefore an objective to it is low and energy-saving and environment-friendly for lithium to provide a kind of production cost The preparation method of the silicon carbide sagger of cell positive material roasting；The prepared silicon carbide for anode material of lithium battery roasting Saggar thermal shock resistance and erosion-resisting characteristics are excellent, and service life is long.
To achieve the above object, the step of the technical solution adopted in the present invention is：
Step 1: with the Suzhou soil of the alumina powder of 40~55wt%, the zircon of 30~40wt% and 10~20wt% For mixture, the vanadic anhydride and 5~8wt% water of the additional 4~6wt% of mixture are uniformly mixed, and it is mixed that working lining is made Close material.
Step 2: with the talcum of 30~45wt%, 10~20wt% the alumina powder and 40~50wt% described in Suzhou soil is substrate material, the water of the additional 40~50wt% of substrate material, 5~7h of ball milling, is dried, and is crushed, and matrix powder is made.
Step 3: using the matrix powder of the carborundum aggregate of 60~75wt% and 25~40wt% as raw material, it is additional The bonding agent of the 5~10wt% of raw material is uniformly mixed, mechanical pressing, and saggar matrix is made.
Step 4: the bottom-working surface in the saggar matrix is uniformly distributed one layer of working lining mixture, the work The thickness of feed layer for making layer mixture is 2~4mm；Then machine pressure is carried out to the bed of material, it is dry；Then at 1370~1400 DEG C of conditions 8~10h of lower heat preservation, is made the silicon carbide sagger roasted for anode material of lithium battery.
The Al of the alumina powder2O3The grain size of content >=99wt%, the alumina powder is less than 10 μm.
The ZrO of the zircon2Content >=65wt%；The grain size of the zircon is less than 89 μm.
The Al of the Suzhou soil2O3Content >=35wt%；The grain size of the Suzhou soil is less than 50 μm.
The V of the vanadic anhydride2O5Content >=95wt%；The grain size of the vanadic anhydride is less than 50 μm.
Content of MgO >=30wt% of the talcum；The grain size of the talcum is less than 50 μm.
SiC content >=98wt% of the carborundum aggregate；The grain composition of the carborundum aggregate is：Grain size is less than 2mm and be 50~60wt% more than or equal to 1mm, grain size is less than 1mm and is 20~25wt% more than or equal to 0.5mm, and grain size is less than 0.50mm is 20~25wt%.
The bonding agent is one kind in alkaline silica sol, waterglass and alkaline pulp waste liquid.
Due to the adoption of the above technical scheme, the present invention has following good effect compared with prior art：
The present invention forms the excellent working lining of erosion-resisting characteristics on saggar surface, improves and is roasted for anode material of lithium battery The service life of the silicon carbide sagger of burning；Reaction in-situ generates the low cordierite of the coefficient of expansion in saggar matrix, and forms violet Green stone silicon carbide structure；Silicon carbide has excellent thermal shock resistance, is generated by the dioxygen oxidation in air under high temperature Indefinite form SiO2It is reacted with working lining powder and generates mullite, improve the bond strength of working lining and saggar matrix.
Silicon carbide sagger for anode material of lithium battery roasting prepared by the present invention is after testing：Bulk density is less than 2.6g/cm3；Compressive resistance is 90~120MPa；Anode material of lithium battery cobalt acid lithium is synthesized at 1000 DEG C, prepared is used for lithium When the silicon carbide sagger recycling number of cell positive material roasting is more than 48 times, working face peels off.
Therefore, production cost of the present invention is low and energy conservation and environmental protection, the prepared carbonization for anode material of lithium battery roasting Silicon saggar have good thermal shock stability, erosion-resisting characteristics is excellent and service life is long.
Specific implementation mode
The invention will be further described With reference to embodiment, not to the limitation of its protection domain：
It is first that the material Unify legislation involved by present embodiment is as follows to avoid repeating, it will not go to live in the household of one's in-laws on getting married in embodiment It states：
The Al of the alumina powder2O3The grain size of content >=99wt%, the alumina powder is less than 10 μm.
The ZrO of the zircon2Content >=65wt%；The grain size of the zircon is less than 89 μm.
The Al of the Suzhou soil2O3Content >=35wt%；The grain size of the Suzhou soil is less than 50 μm.
The V of the vanadic anhydride2O5Content >=95wt%；The grain size of the vanadic anhydride is less than 50 μm.
Content of MgO >=30wt% of the talcum；The grain size of the talcum is less than 50 μm.
SiC content >=98wt% of the carborundum aggregate；The grain composition of the carborundum aggregate is：Grain size is less than 2mm and be 50~60wt% more than or equal to 1mm, grain size is less than 1mm and is 20~25wt% more than or equal to 0.5mm, and grain size is less than 0.50mm is 20~25wt%.
Embodiment 1
A kind of silicon carbide sagger and preparation method thereof for anode material of lithium battery roasting.Preparation side described in the present embodiment The step of method is：
Step 1: with the Suzhou soil of the alumina powder of 40~45wt%, the zircon of 37~40wt% and 17~20wt% For mixture, the vanadic anhydride and 5~8wt% water of the additional 4~6wt% of mixture are uniformly mixed, and it is mixed that working lining is made Close material.
Step 2: with the talcum of 30~35wt%, 17~20wt% the alumina powder and 47~50wt% described in Suzhou soil is substrate material, the water of the additional 40~50wt% of substrate material, 5~7h of ball milling, is dried, and is crushed, and matrix powder is made.
Step 3: using the saggar matrix powder of the carborundum aggregate of 60~65wt% and 35~40wt% as raw material, it is additional The alkaline silica sol of the 5~10wt% of raw material is uniformly mixed, mechanical pressing, and saggar matrix is made.
Step 4: the bottom-working surface in the saggar matrix is uniformly distributed one layer of working lining mixture, the work The thickness of feed layer for making layer mixture is 2~4mm；Then machine pressure is carried out to the bed of material, it is dry；Then at 1370~1400 DEG C of conditions 8~10h of lower heat preservation, is made the silicon carbide sagger roasted for anode material of lithium battery.
The carborundum aggregate is green silicon carbide.
Silicon carbide sagger for anode material of lithium battery roasting prepared by the present embodiment 1 is after testing：Bulk density is less than 2.5g/cm3；Compressive resistance is 93~103MPa；Anode material of lithium battery cobalt acid lithium is synthesized at 1000 DEG C, prepared is used for lithium When the silicon carbide sagger recycling number of cell positive material roasting reaches 49 times, working face peels off.
Embodiment 2
A kind of silicon carbide sagger and preparation method thereof for anode material of lithium battery roasting.Preparation side described in the present embodiment The step of method is：
Step 1: with the Suzhou soil of the alumina powder of 45~50wt%, the zircon of 34~37wt% and 15~18wt% For mixture, the vanadic anhydride and 5~8wt% water of the additional 4~6wt% of mixture are uniformly mixed, and it is mixed that working lining is made Close material.
Step 2: with the talcum of 35~40wt%, 15~18wt% the alumina powder and 44~47wt% described in Suzhou soil is substrate material, the water of the additional 40~50wt% of substrate material, 5~7h of ball milling, is dried, and is crushed, and matrix powder is made.
Step 3: using the saggar matrix powder of the carborundum aggregate of 65~70wt% and 30~35wt% as raw material, it is additional The waterglass of the 5~10wt% of raw material is uniformly mixed, mechanical pressing, and saggar matrix is made.
Step 4: the bottom-working surface in the saggar matrix is uniformly distributed one layer of working lining mixture, the work The thickness of feed layer for making layer mixture is 2~4mm；Then machine pressure is carried out to the bed of material, it is dry；Then at 1370~1400 DEG C of conditions 8~10h of lower heat preservation, is made the silicon carbide sagger roasted for anode material of lithium battery.
The carborundum aggregate is green silicon carbide.
Silicon carbide sagger for anode material of lithium battery roasting prepared by the present embodiment 2 is after testing：Bulk density is less than 2.5g/cm3；Compressive resistance is 100~110MPa；Anode material of lithium battery cobalt acid lithium is synthesized at 1000 DEG C, prepared is used for When the silicon carbide sagger recycling number of anode material of lithium battery roasting reaches 52 times, working face peels off.
Embodiment 3
A kind of silicon carbide sagger and preparation method thereof for anode material of lithium battery roasting.Preparation side described in the present embodiment The step of method is：
Step 1: with the Suzhou soil of the alumina powder of 50~55wt%, the zircon of 31~34wt% and 14~17wt% For mixture, the vanadic anhydride and 5~8wt% water of the additional 4~6wt% of mixture are uniformly mixed, and it is mixed that working lining is made Close material.
Step 2: with the talcum of 40~45wt%, 13~16wt% the alumina powder and 41~44wt% described in Suzhou soil is substrate material, the water of the additional 40~50wt% of substrate material, 5~7h of ball milling, is dried, and is crushed, and matrix powder is made.
Step 3: using the saggar matrix powder of the carborundum aggregate of 70~75wt% and 25~30wt% as raw material, it is additional The alkaline pulp waste liquid of the 5~10wt% of raw material is uniformly mixed, mechanical pressing, and saggar matrix is made.
Step 4: the bottom-working surface in the saggar matrix is uniformly distributed one layer of working lining mixture, the work The thickness of feed layer for making layer mixture is 2~4mm；Then machine pressure is carried out to the bed of material, it is dry；Then at 1370~1400 DEG C of conditions 8~10h of lower heat preservation, is made the silicon carbide sagger roasted for anode material of lithium battery.
The carborundum aggregate is green silicon carbide.
Silicon carbide sagger for anode material of lithium battery roasting prepared by the present embodiment 3 is after testing：Bulk density is less than 2.6g/cm3；Compressive resistance is 110~120MPa；Anode material of lithium battery cobalt acid lithium is synthesized at 1000 DEG C, prepared is used for When the silicon carbide sagger recycling number of anode material of lithium battery roasting reaches 56 times, working face peels off.
Embodiment 4
A kind of silicon carbide sagger and preparation method thereof for anode material of lithium battery roasting.Preparation side described in the present embodiment The step of method is：
Step 1: with the Suzhou soil of the alumina powder of 45~50wt%, the zircon of 36~39wt% and 13~16wt% For mixture, the vanadic anhydride and 5~8wt% water of the additional 4~6wt% of mixture are uniformly mixed, and it is mixed that working lining is made Close material.
Step 2: with the talcum of 38~43wt%, 17~20wt% the alumina powder and 40~43wt% described in Suzhou soil is substrate material, the water of the additional 40~50wt% of substrate material, 5~7h of ball milling, is dried, and is crushed, and matrix powder is made.
Step 3: using the saggar matrix powder of the carborundum aggregate of 62~67wt% and 33~38wt% as raw material, it is additional The alkaline pulp waste liquid of the 5~10wt% of raw material is uniformly mixed, mechanical pressing, and saggar matrix is made.
Step 4: the bottom-working surface in the saggar matrix is uniformly distributed one layer of working lining mixture, the work The thickness of feed layer for making layer mixture is 2~4mm；Then machine pressure is carried out to the bed of material, it is dry；Then at 1370~1400 DEG C of conditions 8~10h of lower heat preservation, is made the silicon carbide sagger roasted for anode material of lithium battery.
The carborundum aggregate is black silicon carbide.
Silicon carbide sagger for anode material of lithium battery roasting prepared by the present embodiment 4 is after testing：Bulk density is less than 2.5g/cm3；Compressive resistance is 90~100MPa；Anode material of lithium battery cobalt acid lithium is synthesized at 1000 DEG C, prepared is used for lithium When the silicon carbide sagger recycling number of cell positive material roasting reaches 50 times, working face peels off.
Embodiment 5
A kind of silicon carbide sagger and preparation method thereof for anode material of lithium battery roasting.Preparation side described in the present embodiment The step of method is：
Step 1: with the Suzhou soil of the alumina powder of 50~55wt%, the zircon of 34~37wt% and 10~13wt% For mixture, the vanadic anhydride and 5~8wt% water of the additional 4~6wt% of mixture are uniformly mixed, and it is mixed that working lining is made Close material.
Step 2: with the talcum of 38~43wt%, 10~13wt% the alumina powder and 47~50wt% described in Suzhou soil is substrate material, the water of the additional 40~50wt% of substrate material, 5~7h of ball milling, is dried, and is crushed, and matrix powder is made.
Step 3: using the saggar matrix powder of the carborundum aggregate of 67~72wt% and 28~33wt% as raw material, it is additional The waterglass of the 5~10wt% of raw material is uniformly mixed, mechanical pressing, and saggar matrix is made.
Step 4: the bottom-working surface in the saggar matrix is uniformly distributed one layer of working lining mixture, the work The thickness of feed layer for making layer mixture is 2~4mm；Then machine pressure is carried out to the bed of material, it is dry；Then at 1370~1400 DEG C of conditions 8~10h of lower heat preservation, is made the silicon carbide sagger roasted for anode material of lithium battery.
The carborundum aggregate is black silicon carbide.
Silicon carbide sagger for anode material of lithium battery roasting prepared by the present embodiment 5 is after testing：Bulk density is less than 2.5g/cm3；Compressive resistance is 105~115MPa；Anode material of lithium battery cobalt acid lithium is synthesized at 1000 DEG C, prepared is used for When the silicon carbide sagger recycling number of anode material of lithium battery roasting reaches 54 times, working face peels off.
Embodiment 6
A kind of silicon carbide sagger and preparation method thereof for anode material of lithium battery roasting.Preparation side described in the present embodiment The step of method is：
Step 1: with the Suzhou soil of the alumina powder of 50~55wt%, the zircon of 30~33wt% and 14~17wt% For mixture, the vanadic anhydride and 5~8wt% water of the additional 4~6wt% of mixture are uniformly mixed, and it is mixed that working lining is made Close material.
Step 2: with the talcum of 30~35wt%, 17~20wt% the alumina powder and 47~50wt% described in Suzhou soil is substrate material, the water of the additional 40~50wt% of substrate material, 5~7h of ball milling, is dried, and is crushed, and matrix powder is made.
Step 3: using the saggar matrix powder of the carborundum aggregate of 63~68wt% and 32~37wt% as raw material, it is additional The alkaline silica sol of the 5~10wt% of raw material is uniformly mixed, mechanical pressing, and saggar matrix is made.
Step 4: the bottom-working surface in the saggar matrix is uniformly distributed one layer of working lining mixture, the work The thickness of feed layer for making layer mixture is 2~4mm；Then machine pressure is carried out to the bed of material, it is dry；Then at 1370~1400 DEG C of conditions 8~10h of lower heat preservation, is made the silicon carbide sagger roasted for anode material of lithium battery.
The carborundum aggregate is black silicon carbide.
Silicon carbide sagger for anode material of lithium battery roasting prepared by the present embodiment 6 is after testing：Bulk density is less than 2.5g/cm3；Compressive resistance is 100~110MPa；Anode material of lithium battery cobalt acid lithium is synthesized at 1000 DEG C, prepared is used for The silicon carbide sagger of anode material of lithium battery roasting recycles number and reaches 50 for the moment, and working face peels off.
Embodiment 7
A kind of silicon carbide sagger and preparation method thereof for anode material of lithium battery roasting.Preparation side described in the present embodiment The step of method is：
Step 1: with the Suzhou soil of the alumina powder of 41~46wt%, the zircon of 37~40wt% and 16~19wt% For mixture, the vanadic anhydride and 5~8wt% water of the additional 4~6wt% of mixture are uniformly mixed, and it is mixed that working lining is made Close material.
Step 2: with the talcum of 35~40wt%, 15~18wt% the alumina powder and 44~47wt% described in Suzhou soil is substrate material, the water of the additional 40~50wt% of substrate material, 5~7h of ball milling, is dried, and is crushed, and saggar matrix is made Powder.
Step 3: using the saggar matrix powder of the carborundum aggregate of 68~73wt% and 27~32wt% as raw material, it is additional The alkaline pulp waste liquid of the 5~10wt% of raw material is uniformly mixed, mechanical pressing, and saggar matrix is made.
Step 4: the bottom-working surface in the saggar matrix is uniformly distributed one layer of working lining mixture, the work The thickness of feed layer for making layer mixture is 2~4mm；Then machine pressure is carried out to the bed of material, it is dry；Then at 1370~1400 DEG C of conditions 8~10h of lower heat preservation, is made the silicon carbide sagger roasted for anode material of lithium battery.
The carborundum aggregate is green silicon carbide.
Silicon carbide sagger for anode material of lithium battery roasting prepared by the present embodiment 7 is after testing：Bulk density is less than 2.6g/cm3, compressive resistance is 105~115MPa；Anode material of lithium battery cobalt acid lithium is synthesized at 1000 DEG C, prepared is used for When the silicon carbide sagger recycling number of anode material of lithium battery roasting reaches 54 times, working face peels off.
Embodiment 8
A kind of silicon carbide sagger and preparation method thereof for anode material of lithium battery roasting.Preparation side described in the present embodiment The step of method is：
Step 1: with the Suzhou soil of the alumina powder of 42~47wt%, the zircon of 35~38wt% and 17~20wt% For mixture, the vanadic anhydride and 5~8wt% water of the additional 4~6wt% of mixture are uniformly mixed, and it is mixed that working lining is made Close material.
Step 2: with the talcum of 40~45wt%, 13~16wt% the alumina powder and 41~44wt% described in Suzhou soil is substrate material, the water of the additional 40~50wt% of substrate material, 5~7h of ball milling, is dried, and is crushed, and matrix powder is made.
Step 3: using the saggar matrix powder of the carborundum aggregate of 70~75wt% and 25~30wt% as raw material, it is additional The alkaline pulp waste liquid of the 5~10wt% of raw material is uniformly mixed, mechanical pressing, and saggar matrix is made.
Step 4: the bottom-working surface in the saggar matrix is uniformly distributed one layer of working lining mixture, the work The thickness of feed layer for making layer mixture is 2~4mm；Then machine pressure is carried out to the bed of material, it is dry；Then at 1370~1400 DEG C of conditions 8~10h of lower heat preservation, is made the silicon carbide sagger roasted for anode material of lithium battery.
The carborundum aggregate is green silicon carbide.
Silicon carbide sagger for anode material of lithium battery roasting prepared by the present embodiment 8 is after testing：Bulk density is less than 2.6g/cm3；Compressive resistance is 107~117MPa；Anode material of lithium battery cobalt acid lithium is synthesized at 1000 DEG C, prepared is used for When the silicon carbide sagger recycling number of anode material of lithium battery roasting reaches 56 times, working face peels off.
Embodiment 9
A kind of silicon carbide sagger and preparation method thereof for anode material of lithium battery roasting.Preparation side described in the present embodiment The step of method is：
Step 1: with the Suzhou soil of the alumina powder of 43~48wt%, the zircon of 36~39wt% and 15~18wt% For mixture, the vanadic anhydride and 5~8wt% water of the additional 4~6wt% of mixture are uniformly mixed, and it is mixed that working lining is made Close material.
Step 2: with the talcum of 38~43wt%, 17~20wt% the alumina powder and 40~43wt% described in Suzhou soil is substrate material, the water of the additional 40~50wt% of substrate material, 5~7h of ball milling, is dried, and is crushed, and matrix powder is made.
Step 3: using the saggar matrix powder of the carborundum aggregate of 62~67wt% and 33~38wt% as raw material, it is additional The alkaline silica sol of the 5~10wt% of raw material is uniformly mixed, mechanical pressing, and saggar matrix is made.
Step 4: the bottom-working surface in the saggar matrix is uniformly distributed one layer of working lining mixture, the work The thickness of feed layer for making layer mixture is 2~4mm；Then machine pressure is carried out to the bed of material, it is dry；Then at 1370~1400 DEG C of conditions 8~10h of lower heat preservation, is made the silicon carbide sagger roasted for anode material of lithium battery.
The carborundum aggregate is black silicon carbide.
Silicon carbide sagger for anode material of lithium battery roasting prepared by the present embodiment 9 is after testing：Bulk density is less than 2.5g/cm3；Compressive resistance is 97~107MPa；Anode material of lithium battery cobalt acid lithium is synthesized at 1000 DEG C, prepared is used for lithium When the silicon carbide sagger recycling number of cell positive material roasting reaches 49 times, working face peels off.
Embodiment 10
A kind of silicon carbide sagger and preparation method thereof for anode material of lithium battery roasting.Preparation side described in the present embodiment The step of method is：
Step 1: with the Suzhou soil of the alumina powder of 44~49wt%, the zircon of 37~40wt% and 14~17wt% For mixture, the vanadic anhydride and 5~8wt% water of the additional 4~6wt% of mixture are uniformly mixed, and it is mixed that working lining is made Close material.
Step 2: with the talcum of 38~43wt%, 10~13wt% the alumina powder and 47~50wt% described in Suzhou soil is substrate material, the water of the additional 40~50wt% of substrate material, 5~7h of ball milling, is dried, and is crushed, and saggar matrix is made Powder.
Step 3: using the saggar matrix powder of the carborundum aggregate of 67~72wt% and 28~33wt% as raw material, it is additional The alkaline silica sol of the 5~10wt% of raw material is uniformly mixed, mechanical pressing, and saggar matrix is made.
Step 4: the bottom-working surface in the saggar matrix is uniformly distributed one layer of working lining mixture, the work The thickness of feed layer for making layer mixture is 2~4mm；Then machine pressure is carried out to the bed of material, it is dry；Then at 1370~1400 DEG C of conditions 8~10h of lower heat preservation, is made the silicon carbide sagger roasted for anode material of lithium battery.
The carborundum aggregate is black silicon carbide.
Silicon carbide sagger for anode material of lithium battery roasting prepared by the present embodiment 10 is after testing：Bulk density is less than 2.6g/cm3；Compressive resistance is 104~114MPa；Anode material of lithium battery cobalt acid lithium is synthesized at 1000 DEG C, prepared is used for When the silicon carbide sagger recycling number of anode material of lithium battery roasting reaches 50 three times, working face peels off.
Present embodiment has following good effect compared with prior art：
Present embodiment forms the excellent working lining of erosion-resisting characteristics on saggar surface, improves for lithium battery just The service life of the silicon carbide sagger of pole material calcination；Reaction in-situ generates the low cordierite of the coefficient of expansion in saggar matrix, And form cordierite silicon carbide structure；Silicon carbide has excellent thermal shock resistance, by the oxygen oxygen in air under high temperature Metaplasia at indefinite form SiO2It is reacted with working lining powder and generates mullite, the combination for improving working lining and saggar matrix is strong Degree.
Silicon carbide sagger for anode material of lithium battery roasting prepared by present embodiment is after testing：Bulk density Less than 2.6g/cm3；Compressive resistance is 90~120MPa；Anode material of lithium battery cobalt acid lithium, prepared use are synthesized at 1000 DEG C When the silicon carbide sagger of anode material of lithium battery roasting recycles number and is more than 48 times, working face peels off.
Therefore, present embodiment production cost is low and energy conservation and environmental protection, the prepared anode material of lithium battery that is used for roast The silicon carbide sagger of burning have good thermal shock stability, erosion-resisting characteristics is excellent and service life is long.

Claims (9)

1. a kind of preparation method of silicon carbide sagger for anode material of lithium battery roasting, it is characterised in that the preparation method The step of be：
Step 1: being mixed with the Suzhou soil of the alumina powder of 40~55wt%, the zircon of 30~40wt% and 10~20wt% Material is closed, the vanadic anhydride and 5~8wt% water of the additional 4~6wt% of mixture are uniformly mixed, and working lining mixing is made Material；
Step 2: with the Suzhou of the talcum of 30~45wt%, the alumina powder of 10~20wt% and 40~50wt% Soil is substrate material, and the water of the additional 40~50wt% of substrate material, 5~7h of ball milling is dried, broken, and matrix powder is made；
Step 3: using the matrix powder of the carborundum aggregate of 60~75wt% and 25~40wt% as raw material, it is additional described The bonding agent of 5~10wt% of raw material is uniformly mixed, mechanical pressing, and saggar matrix is made；
Step 4: the bottom-working surface in the saggar matrix is uniformly distributed one layer of working lining mixture, the working lining The thickness of feed layer of mixture is 2~4mm；Then machine pressure is carried out to the bed of material, it is dry；It is protected under the conditions of 1370~1400 DEG C 8~10h of temperature, is made the silicon carbide sagger roasted for anode material of lithium battery.
2. the preparation method of the silicon carbide sagger according to claim 1 for anode material of lithium battery roasting, feature It is the Al of the alumina powder2O3The grain size of content >=99wt%, the alumina powder is less than 10 μm.
3. the preparation method of the silicon carbide sagger according to claim 1 for anode material of lithium battery roasting, feature It is the ZrO of the zircon2Content >=65wt%；The grain size of the zircon is less than 89 μm.
4. the preparation method of the silicon carbide sagger according to claim 1 for anode material of lithium battery roasting, feature It is the Al of the Suzhou soil2O3Content >=35wt%；The grain size of the Suzhou soil is less than 50 μm.
5. the preparation method of the silicon carbide sagger according to claim 1 for anode material of lithium battery roasting, feature It is the V of the vanadic anhydride2O5Content >=95wt%；The grain size of the vanadic anhydride is less than 50 μm.
6. the preparation method of the silicon carbide sagger according to claim 1 for anode material of lithium battery roasting, feature It is content of MgO >=30wt% of the talcum；The grain size of the talcum is less than 50 μm.
7. the preparation method of the silicon carbide sagger according to claim 1 for anode material of lithium battery roasting, feature It is that the carborundum aggregate is green silicon carbide or is black silicon carbide；SiC content >=98wt% of the carborundum aggregate； The grain composition of the carborundum aggregate is：Grain size be less than 2mm and more than or equal to 1mm be 50~60wt%, grain size be less than 1mm and It is 20~25wt% more than or equal to 0.5mm, it is 20~25wt% that grain size, which is less than 0.50mm,.
8. the preparation method of the silicon carbide sagger according to claim 1 for anode material of lithium battery roasting, feature It is that the bonding agent is one kind in alkaline silica sol, waterglass and alkaline pulp waste liquid.
9. a kind of silicon carbide sagger for anode material of lithium battery roasting, it is characterised in that described to be used for anode material of lithium battery The silicon carbide sagger of roasting is according to the carbonization for being used for anode material of lithium battery roasting described in any one of claim 1~8 The silicon carbide sagger for anode material of lithium battery roasting prepared by the preparation method of silicon saggar.
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CN110540418A (en) * 2019-09-20 2019-12-06 湖南金铠新材料科技有限公司 Sagger special for sintering lithium battery positive electrode material and preparation method thereof
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CN111269015A (en) * 2020-03-25 2020-06-12 武汉理工大学 Densified mullite-corundum-SiC composite heat storage ceramic material for solar thermal power generation and preparation method thereof
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CN109761593A (en) * 2019-03-13 2019-05-17 武汉科技大学 It is a kind of using Aluminum sol as anode material of lithium battery sintering saggar of bonding agent and preparation method thereof
CN110204323A (en) * 2019-05-31 2019-09-06 武汉科技大学 A kind of energy-saving cordierite zircon composite diphase material and preparation method thereof
CN110540418A (en) * 2019-09-20 2019-12-06 湖南金铠新材料科技有限公司 Sagger special for sintering lithium battery positive electrode material and preparation method thereof
CN111037710A (en) * 2019-12-12 2020-04-21 湖南太子新材料科技有限公司 Forming method of sagger for lithium battery positive electrode material
CN111269015A (en) * 2020-03-25 2020-06-12 武汉理工大学 Densified mullite-corundum-SiC composite heat storage ceramic material for solar thermal power generation and preparation method thereof
CN114031407A (en) * 2021-12-13 2022-02-11 湖南太子新材料科技有限公司 Silicon carbide sagger for lithium battery anode material and preparation method thereof

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