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A cordierite-bonded calcium hexaaluminate sagger and its preparation method

A technology of calcium hexaaluminate and cordierite, which is applied in the field of cordierite combined with calcium hexaaluminate sagger and its preparation, which can solve the problems of complicated molding steps, easy melting of cordierite, increased impregnation steps, etc., and achieve low production cost , excellent alkali corrosion resistance, and the effect of simplifying the preparation process

Active Publication Date: 2021-04-16
WUHAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

"A layered sagger resistant to high temperature corrosion of lithium batteries and its preparation method" (CN201610159994.0) patent technology discloses a preparation method of a sagger with a three-layer structure on the bottom surface. The molding steps are complicated and the firing temperature is low. Bluestone is prone to melting
"A sagger with a high-temperature corrosion-resistant coating for lithium batteries and its preparation method" (CN201610159837.X) patent technology, the sagger body is made from mullite and cordierite, etc. The surface impregnation glaze improves the anti-erosion performance, but increases the impregnation step and increases the complexity of the production process

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A cordierite-bonded calcium hexaaluminate sagger and a preparation method thereof. The preparation method described in this embodiment is:

[0020] First mix 50-55wt% calcium hexaaluminate aggregate, 32-35wt% cordierite powder and 12-15wt% soft clay as raw materials, then add 4-8wt% water glass of the raw materials, mix homogeneous, machine-pressed, dried, and then kept at 1350-1400°C for 8-10 hours to obtain a cordierite-bonded calcium hexaaluminate sagger.

[0021] The cordierite-bonded calcium hexaaluminate sagger prepared in Example 1 was tested: the bulk density was lower than 2.3 g / cm 3 ; The compressive strength is 55-60MPa; Lithium cobalt oxide, the positive electrode material of lithium battery, is synthesized at 1000°C. When the cordierite combined with calcium hexaaluminate saggar is used for 39 times, the working surface will peel off.

Embodiment 2

[0023] A cordierite-bonded calcium hexaaluminate sagger and a preparation method thereof. The preparation method described in this embodiment is:

[0024] First mix 55-60wt% calcium hexaaluminate aggregate, 30-33wt% cordierite powder and 9-12wt% soft clay as raw materials, then add 4-8wt% water glass of the raw materials, mix homogeneous, machine-pressed, dried, and then kept at 1350-1400°C for 8-10 hours to obtain a cordierite-bonded calcium hexaaluminate sagger.

[0025] The cordierite-bonded calcium hexaaluminate sagger prepared in Example 2 was tested: the bulk density was lower than 2.3 g / cm 3 ; The compressive strength is 50-55MPa; Lithium cobaltate, the positive electrode material of lithium battery, is synthesized at 1000°C. When the cordierite combined with calcium hexaaluminate saggar is used for 42 times, the working surface will peel off.

Embodiment 3

[0027] A cordierite-bonded calcium hexaaluminate sagger and a preparation method thereof. The preparation method described in this embodiment is:

[0028] First mix 60-65wt% calcium hexaaluminate aggregate, 27-30wt% cordierite powder and 7-10wt% soft clay as raw materials, then add 4-8wt% water glass of the raw materials, mix homogeneous, machine-pressed, dried, and then kept at 1350-1400°C for 8-10 hours to obtain a cordierite-bonded calcium hexaaluminate sagger.

[0029] The cordierite-bonded calcium hexaaluminate sagger prepared in Example 3 was tested: the bulk density was lower than 2.5 g / cm 3 ; The compressive strength is 45-50MPa; Lithium cobalt oxide, the positive electrode material of lithium battery, is synthesized at 1000 ° C. When the prepared cordierite combined with calcium hexaaluminate saggar is used for 47 times, the working surface will peel off.

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Abstract

The invention relates to a cordierite-bonded calcium hexaaluminate sagger and a preparation method thereof. The technical solution is: first mix 50-65wt% calcium hexaaluminate aggregate, 25-35wt% cordierite powder and 5-15wt% plastic clay as raw materials, and then add 4-8wt% of the raw materials The binder is uniformly mixed, machine-pressed, dried, and then kept at 1350-1400° C. for 8-10 hours to obtain a cordierite-bound calcium hexaaluminate sagger. The invention has the characteristics of low production cost and simple preparation process, and the prepared cordierite-bonded calcium hexaaluminate sagger has excellent corrosion resistance and long service life.

Description

technical field [0001] The invention belongs to the technical field of saggers. In particular, it relates to a cordierite-bonded calcium hexaaluminate sagger and a preparation method thereof. Background technique [0002] The high-temperature solid-phase synthesis method has been widely used in the actual production of lithium-ion battery cathode materials due to its simple process and low equipment requirements. As a container for raw materials during high-temperature roasting, the sagger is mainly due to the erosion and repeated damage to the cooling and heating cycles. With the rapid development of the lithium-ion battery industry, the increasing demand for lithium-ion batteries and the development trend of high voltage put forward stricter requirements on the performance of the sagger. [0003] "Zircon mullite saggar" (ZL201410189300.9) patent technology discloses a method for preparing saggar with mullite, tabular alumina and zircon sand as raw materials. The raw mate...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/66C04B35/44C04B35/622C04B35/63
CPCC04B35/44C04B35/622C04B35/6316C04B35/66C04B2235/3481C04B2235/349C04B2235/77C04B2235/96C04B2235/9669
Inventor 向若飞李远兵李淑静欧阳思罗瀚李仕祺
Owner WUHAN UNIV OF SCI & TECH
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