Preparation method of spinel-mullite ceramic sagger

Abstract

The invention discloses a preparation method of a spinel-mullite ceramic sagger, and relates to the spinel-mullite ceramic sagger. A ceramic sagger matrix is prepared from the following raw materialsand a colloidal solution, and the raw materials comprise the components in percentage by weight: 40-50% of fused magnesia-alumina spinel, 15-25% of fused mullite, 15-20% of aluminum oxide micro powder, 4-8% of aluminum titanate fine powder, 5-10% of zirconium oxide, 3-5% of magnesite micro powder and 3-5% of clay fine powder; the colloidal solution is a gel, and the gel comprises the components inpercentage by weight: 10-14% of acrylamide, 0.2-0.4% of methylene bisacrylamide, 0.4-0.6% of ammonium persulfate, 0.2-0.4% of tetramethylethylenediamine and the balance being water, wherein the weight of the gel accounts for 8%-12% of the total weight of the raw materials. The preparation method comprises the steps of slurry preparation, injection molding, demolding, drying and firing. A productsintered by the method is high in volume density, high in strength, high in thermal shock stability and excellent in use performance.

Description

technical field [0001] The invention relates to the field of spinel-mullite ceramics, in particular to a method for preparing a spinel-mullite ceramic sagger. Background technique [0002] As known, ceramic saggers are widely used in the calcination of positive electrode materials in the lithium battery industry. Lithium battery cathode materials mainly contain a large amount of lithium hydroxide or other forms of lithium salt compounds. Due to the small ion radius of lithium ions and strong alkalinity, the permeability and corrosion of lithium ions are very strong. The use requirements of very harsh use occasions are also very harsh. [0003] my country is the world's largest producer of lithium batteries, and the demand for ceramic saggers is very large, but most of them are shaped by traditional mechanical pressing methods. However, since the sagger is a thin-walled product, the uniformity of density and strength of the four walls of the sagger cannot be guaranteed by m...

AI Technical Summary

Problems solved by technology

However, because the sagger is a thin-walled product, the uniformity of density and strength of the four walls of the sagger cannot be guaranteed by mechanical pressing; therefore, the sagger usually suffers from low density, low strength, poor corrosion resistance, The phenomenon of peeling and slag on the surface cannot meet the requirements of high-quality lithium battery materials