Composite saggar as well as preparation method and application thereof

A saggar and particle size technology, applied in the field of refractory materials, can solve the problems of affecting the service life of the saggar, spalling, cracking, and low service life of the saggar, and achieve the effects of high cost performance, not easy to break, and good dimensional stability.

Active Publication Date: 2018-05-29
ZHEJIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In actual production, it is often the combined influence of two factors that causes the service life of the sagger to be low
The positive electrode material of the lithium battery first corrodes the sagger, especially the lithium oxide at high temperature has a very high activity, it will react with the refractory material in the sagger, and a liquid phase similar to glass is formed at a high temperature, and these liquid phase components are in the The change of viscosity continuously erodes the solid phase surface of the sagger, and the pores on the surface of the sagger will also provide channels for these corrosion products

Method used

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  • Composite saggar as well as preparation method and application thereof
  • Composite saggar as well as preparation method and application thereof

Examples

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Example Embodiment

[0079] The present invention also provides a preparation method of the above-mentioned composite saggar, comprising the following steps:

[0080] (a) the base material raw material of formula quantity is mixed homogeneously, then add the binding agent and mix homogeneously again to obtain the base material mixture;

[0081] (b) mix the fabric raw materials of the formula amount uniformly, then add the binding agent and mix it evenly again to obtain the fabric mixture;

[0082] (c) adding the base material mixture and the top material mixture to the mould successively, and then molding to obtain a blank;

[0083] (d) curing the blank for 10-14 hours, then drying, and finally firing at a temperature of 1360-1410° C. for 3-5 hours to obtain the composite saggar.

[0084] The above curing time is typically but not limited to 10 hours, 10.5 hours, 11 hours, 11.5 hours, 12 hours, 12.5 hours, 13 hours, 13.5 hours or 14 hours. The maintenance method can follow the common methods in ...

Example Embodiment

[0092] Example 1 Corundum fabric

[0093] A composite saggar, comprising a base material and a corundum fabric, the mass ratio of the base material and the corundum fabric is 7:3, and the base material is mainly prepared from the following mass parts of the base material raw materials: 8 parts of kaolin, 6 parts of sillimanite , 6 parts of alumina with a particle size of not more than 46.9μm, 12 parts of corundum with a particle size of not more than 46.9μm, 10 parts of andalusite with a particle size of not more than 0.5mm, and 15 parts of mullite with a particle size of not more than 1mm. It is 8 parts of mullite of 1-2mm and 6 parts of corundum whose particle size is not more than 1mm;

[0094] The corundum fabric is mainly prepared from the following parts by mass of fabric raw materials: 10 parts of alumina with a particle size of not more than 0.7 μm, 5 parts of α-alumina with a particle size of not more than 46.9 μm, and 20 parts of corundum with a particle size of not ...

Example Embodiment

[0095] Example 2 Corundum fabric

[0096] A composite saggar comprises a base material and a corundum fabric, the mass ratio of the base material and the corundum fabric is 9:1, and the base material is mainly prepared from the following parts by mass of the base material: 12 parts of kaolin, 10 parts of sillimanite , 14 parts of alumina with a particle size not greater than 46.9μm, 22 parts of corundum with a particle size of not more than 46.9μm, 20 parts of andalusite with a particle size of not more than 0.5mm, 25 parts of mullite with a particle size of not more than 1mm, It is 12 parts of mullite of 1-2mm and 14 parts of corundum whose particle size is not more than 1mm;

[0097] The corundum fabric is mainly prepared from the following material parts by mass: 20 parts of alumina with a particle size of not more than 0.7 μm, 15 parts of α-alumina with a particle size of not more than 46.9 μm, and 30 parts of corundum with a particle size of not more than 46.9 μm parts, ...

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Abstract

The invention relates to the field of refractory materials and particularly provides a composite saggar as well as a preparation method and an application thereof. The composite saggar comprises a bottom material and a surface material. The bottom material is mainly prepared from kaolin, sillimanite with specific particle size, aluminum oxide with specific particle size, corundum with specific particle size, andalusite with specific particle size and mullite with specific particle size. The raw materials of the base material have rich source and low cost, so that the cost of the bottom material is lower. The surface material is mainly prepared from a corundum surface material, a spinel surface material, a zirconium oxide surface material, a zirconium silicate-zirconium oxide surface material or a corundum-spinel surface material. All the raw materials of the surface material cooperate with one another, so that the surface material has good corrosion resistance. The composite saggar haslower cost, good corrosion resistance and the advantage of long service life.

Description

technical field [0001] The invention relates to the field of refractory materials, in particular to a composite sagger, its preparation method and application. Background technique [0002] At present, lithium cobaltate and ternary lithium batteries are widely used cathode materials for lithium batteries in China, and most of the cathode materials are produced by high-temperature solid-phase synthesis in refractory kilns. During the synthesis process, bearing Sagger materials for burning are generally cordierite, mullite, quartz and corundum. Among these materials, cordierite composite mullite sagger products are the most widely used. This type of sagger is made of cordierite, mullite, and corundum as raw materials, with some clay and micropowder added as a binder, and pressed into shape under a high-tonnage press. After constant temperature curing, it is fired in a refractory kiln. The product is obtained. Moreover, the average index of domestic and foreign sagger consump...

Claims

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Application Information

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IPC IPC(8): C04B35/66C04B35/185C04B35/101C04B35/622H01M4/04H01M10/0525
CPCC04B35/101C04B35/185C04B35/622C04B35/66C04B2235/3217C04B2235/3418C04B2235/3463C04B2235/349C04B2235/402C04B2235/96H01M4/04H01M10/0525Y02E60/10
Inventor 王家邦
Owner ZHEJIANG UNIV
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