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Forsterite-corundum sagger for sintering of lithium battery powder and preparation method thereof

A technology of forsterite and corundum sagger, which is applied in the field of forsterite-corundum sagger for sintering lithium battery powder and its preparation, can solve the problems of saggar peeling, reaction peeling, and pollution of lithium battery powder, etc., and achieves improved The softening temperature under load, the preparation method is simple and feasible, and the effect of increasing the content of MgO

Active Publication Date: 2019-03-29
无锡顺佳特种陶瓷有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

(2) The load softening temperature of cordierite is low, and after long-term use, the bottom of the sagger is prone to sagging deformation
[0003] The deformation and cracking of the cordierite saggar is not the main shortcoming of the saggar, the SiO2 in the saggar 2 Reacts with alkaline metal oxides in lithium battery powder, causing the sagger to peel. These reactants enter the lithium battery powder, directly affecting the quality of the lithium battery powder, and greatly reducing the performance of the lithium battery powder
Therefore, in addition to requiring the sagger to have a certain service life, the lithium battery powder manufacturer must not react with the lithium battery powder during use and peel off, pollute the lithium battery powder, and reduce the performance of the lithium battery powder

Method used

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  • Forsterite-corundum sagger for sintering of lithium battery powder and preparation method thereof
  • Forsterite-corundum sagger for sintering of lithium battery powder and preparation method thereof
  • Forsterite-corundum sagger for sintering of lithium battery powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Weigh 35 parts of 2-1mm pre-burned forsterite, 10 parts of 1-0mm pre-burned forsterite, 15 parts of 180 mesh pre-burned forsterite, 6 parts of 325 mesh kaolin, 18 parts of 1-0mm sintered tabular alumina 16 parts of 1500-mesh activated alumina, plus 1 part of 100-mesh complexed magnesium-aluminum glue, plus 0.4 part of dextrin and 0.3 part of calcium lignosulfonate, put it into a mud mixer, and turn it at 15 rpm Speed, stirring for 25-30 minutes to fully mix the raw materials evenly, add 9 parts of water, stir and mix for 20 minutes to discharge the material, put it into the raw material barrel, and let it stand for 24 hours to trap the material. Use a hydraulic press to form under a pressure of 350 tons; place the green body for 24 hours, and then enter the drying room for 110°C×24 hours to dry; then put the sagger into a high-temperature kiln and burn it at 1380°C×4 hours, the entire process can be found in figure 1 , Among them, the pre-sintering method of forsterite ...

Embodiment 2

[0051] Weigh 30 parts of 2-1mm pre-burned forsterite, 8 parts of 1-0mm pre-burned forsterite, 12 parts of 160 mesh pre-burned forsterite, 8 parts of 300 mesh kaolin, 10 parts of 1-0mm sintered tabular alumina , 14 parts of 1600-mesh activated alumina, plus 2 parts of 80-mesh complexed magnesium-aluminum glue, plus 0.2 parts of dextrin and 0.1 part of calcium lignosulfonate, put it into the mud mixer, at a speed of 15 rpm , Stir for 25-30 minutes to fully disperse the raw materials, add 9 parts of water, stir and mix for 20 minutes to discharge the material, put it into the raw material barrel, and let it stand for 24 hours to trap the material. Use a hydraulic press to shape under a pressure of 350 tons; place the green body for 24 hours, and then enter the drying room for drying at 100°C for 30 hours; The pre-sintering method is obtained by sintering it at 1300°C for 4 hours.

[0052] It can be seen from Table 6 that due to the existence of the complexed aluminum-magnesium a...

Embodiment 3

[0056] Weigh 33 parts of 2-1mm pre-burned forsterite, 9 parts of 1-0mm pre-burned forsterite, 13 parts of 160 mesh pre-burned forsterite, 4 parts of 350 mesh kaolin, 25 parts of 1-0mm sintered tabular alumina , 18 parts of 1500-mesh activated alumina, plus 2 parts of 120-mesh complexed magnesium-aluminum glue, plus 0.6 parts of dextrin and 0.5 parts of calcium lignosulfonate, put it into the mud mixer, at a speed of 15 rpm , Stir for 25-30 minutes to fully disperse the raw materials, add 9 parts of water, stir and mix for 20 minutes to discharge the material, put it into the raw material barrel, and let it stand for 24 hours to trap the material. Use a hydraulic press to form under a pressure of 350 tons; place the green body for 24 hours, and then enter the drying room for drying at 120°C for 20 hours; then put the sagger into a high-temperature kiln and burn at 1400°C for 3 hours. The pre-sintering method is obtained by sintering at 1400°C for 2 hours.

[0057] It can be se...

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Abstract

The invention discloses a forsterite-corundum sagger for sintering of lithium battery powder and a preparation method thereof. The sagger comprises the following components by weight: 50-60 parts of pre-sintered forsterite, 16-20 parts of sintered tabular alumina, 4-8 parts of kaolin and 14-18 parts of activated alumina. Under the circumstance of guaranteeing the thermal shock resistant stabilityof product, the sagger provided by the invention reduces the SiO2 content of the sagger material, increases the MgO content, makes the sagger material slight alkaline, does not react with lithium battery powder, and improves the refractoriness under load of the new product, and the sagger is free of deformation phenomenon during use. Compared with the existing cordierite sagger, the production cost is reduced by 1500yuan / ton, during batch trial, the average service life is 45 times, which is greater than the current standard of 40 times. The sagger surface is non-scaling, and has no pollutionto lithium battery powder. At the same time, the preparation method provided by the invention is simple and feasible, and is easy to realize.

Description

technical field [0001] The invention relates to a sagger and a preparation method thereof, in particular to a forsterite-corundum sagger for sintering lithium battery powder and a preparation method thereof. Background technique [0002] In recent years, the lithium battery industry has developed vigorously. Most of the sintered lithium battery powder uses a pusher kiln, and the sintering temperature is between 850-1200°C. Due to the fast production cycle of lithium battery powder, the temperature difference between the inside and outside of the kiln is large, and the lithium battery powder is loaded. The sagger is easy to break. At present, cordierite saggers are used for sintering to produce lithium battery powder, and the service life is 25-40 times, which is inconsistent with the very good thermal shock resistance of the sagger itself. The research found that the main reasons for the damage of the sagger are the following two points: (1) cordierite contains 60-70% SiO ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/20C04B35/622C04B35/626C04B35/63C04B35/64C04B35/66C04B38/00F27D5/00
CPCC04B35/20C04B35/622C04B35/62675C04B35/6316C04B35/64C04B35/66C04B38/00C04B2235/3217C04B2235/349C04B2235/656C04B2235/6567C04B2235/77C04B2235/96C04B2235/9607F27D5/0012C04B38/0074
Inventor 邵顺芳朱义文
Owner 无锡顺佳特种陶瓷有限公司
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