A low-cost long-service-lifetime ceramic saggar and a preparing method thereof

A long-life, low-cost technology, applied in the field of refractory kiln furniture preparation, can solve the problems of high cost and short service life, and achieve good thermal shock resistance and corrosion resistance

Active Publication Date: 2017-07-14
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ceramic sagger mentioned above adopts a relatively large proportion of synthetic raw materials, which has higher cost and shorter service life, such as "a kind of high stability and long-life sagger and its manufacturing method for firing lithium battery positive electrode materials" (CN 102914165B ) The life-span of the saggar provided is slightly longer than that of the prior art, but due to the limitation of thermal shock resistance, the number of times of use still cannot exceed 40 times

Method used

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  • A low-cost long-service-lifetime ceramic saggar and a preparing method thereof
  • A low-cost long-service-lifetime ceramic saggar and a preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] A low-cost and long-life ceramic sagger and a preparation method thereof, comprising the steps of:

[0024] 1) Raw material ratio: talc, bauxite, magnesia-aluminum spinel and cordierite are respectively ball-milled with a ball mill, wherein the magnesia-alumina spinel is divided into two parts for ball milling respectively, one part of which is ball-milled for 0.5h and passed through a 60-mesh sieve, and the other A portion of the raw material is milled for 1.5 hours and passed through a 100-mesh sieve, and other raw materials are ball-milled for 5 hours and passed through a 200-mesh sieve, and then the ingredients are formulated according to the following mass percentages: talc 20%, bauxite 15%, 60-mesh magnesium aluminum spinel 35%, 100 mesh magnesium aluminum spinel 15%, cordierite 15%;

[0025] 2) Preparation of the ceramic sagger green body: mix the raw materials prepared in step 1) in a kneader to obtain a mixed powder, then add a water-soluble binder and water to...

Embodiment 2

[0035] A low-cost and long-life ceramic sagger and a preparation method thereof, comprising the steps of:

[0036] 1) Raw material ratio: talc, bauxite, magnesia-alumina spinel and cordierite are respectively ball-milled with a ball mill, wherein the magnesia-alumina spinel is divided into two parts and ball-milled respectively, one of which is ball-milled for 1 hour and passed through a 65-mesh sieve, and the other After ball milling for 2 hours, pass through a 120 mesh sieve, and other raw materials pass through a 350 mesh sieve after ball milling for 10 hours, and then mix according to the following mass percentages: talc 25%, bauxite 20%, 65 mesh magnesia spinel 35%, 120 mesh Magnesium aluminum spinel 15%, cordierite 5%;

[0037]2) Preparation of the ceramic sagger green body: put the raw materials prepared in step 1) in a kneader and mix them to obtain a mixed powder, then add a water-soluble binder and water to the mixed powder, and continue mixing for 50 minutes to obta...

Embodiment 3

[0044] A low-cost and long-life ceramic sagger and a preparation method thereof, comprising the steps of:

[0045] 1) Raw material ratio: talc, bauxite, magnesia-alumina spinel and cordierite are respectively ball-milled with a ball mill, wherein magnesia-alumina spinel is divided into two parts and ball-milled respectively, one part of which is ball-milled for 0.6h and passed through a 60-mesh sieve, and the other A portion of the raw material is milled for 1.6 hours and passed through a 100-mesh sieve, and other raw materials are ball-milled for 8 hours and passed through a 350-mesh sieve, and then the ingredients are formulated according to the following mass percentages: 25% talc, 15% bauxite, 25% 60-mesh magnesium aluminum spinel, 100 mesh magnesium aluminum spinel 30%, cordierite 5%.

[0046] 2) Preparation of the ceramic sagger green body: mix the raw materials prepared in step 1) in a kneader to obtain a mixed powder, then add a water-soluble binder and water to the mi...

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Abstract

The invention relates to a low-cost long-service-lifetime ceramic saggar and a preparing method thereof. The ceramic saggar is used for sintering powder of a lithium compound. Raw materials of a matrix of the ceramic saggar include, by weight, 20-25% of talcum, 15-20% of bauxitic rock, 5-35% of magnesium aluminate spinel having a size of 60-65 meshes, 15-45% of magnesium aluminate spinel having a size of 100-120 meshes, and 5-15% of cordierite. Some natural ore materials which are the talcum and the bauxitic rock are adopted as raw materials to prepare the ceramic saggar, and the cost is saved by 1/3 or above. The ceramic saggar prepared by the method can bear 50 times of thermal shock cycles without cracks, and has good thermal shock resistance. The ceramic saggar does not react with synthetic raw materials of lithium ion battery cathode materials at 1000 DEG C, and has good corrosion resistance. The service lifetime of the ceramic saggar can be 50 times or above.

Description

technical field [0001] The invention belongs to the field of refractory kiln furniture preparation, and relates to a ceramic sagger for firing lithium-ion battery cathode materials and a preparation method thereof. Background technique [0002] Lithium-ion battery cathode materials are generally prepared by high-temperature solid-phase synthesis (950-1000°C) using ceramic saggers as carriers. Because the raw materials used in the synthesis of positive electrode materials will decompose under high temperature conditions, producing lithium oxide with strong permeability and high reactivity, which will corrode the sagger, cause the inner wall of the sagger to peel off and pulverize, and the service life of the sagger often does not exceed 20 times. . Therefore, the development of a sagger with good corrosion resistance and long life is of great significance for the production and technological progress of lithium-ion battery cathode materials. [0003] At present, ceramic sag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/101C03C8/14C04B41/86
CPCC03C8/14C04B35/101C04B41/009C04B41/5022C04B41/86C04B2235/3217C04B2235/3222C04B2235/3481C04B2235/349C04B2235/5463C04B2235/602C04B2235/606C04B2235/656C04B2235/6567C04B2235/94C04B2235/96C04B2235/9669C04B41/4539
Inventor 徐晓虹张亚祥吴建锋刘鑫坤
Owner WUHAN UNIV OF TECH
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