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Oversized high-alumina ceramic ball and preparation method thereof

A super-sized, high-alumina ceramic technology, applied in the field of super-sized high-alumina ceramic balls and its preparation, can solve the problems of product cracking, foaming, raw burning, etc., achieve a dense matrix without holes, simple preparation process, and low equipment requirements Effect

Pending Publication Date: 2021-06-04
冷水江市佳晨电子陶瓷有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high-alumina ceramic balls produced at home and abroad are mainly made of α-alumina powder as the main raw material, and are produced through ball milling, forming and high-temperature sintering. The forming methods mainly include semi-isostatic pressing, isostatic pressing and rolling. type, for the preparation of super-large-sized high-alumina ceramic balls (size greater than 300mm), due to size factors, during isostatic pressing, due to the huge pressure required, the requirements for equipment are very high, and it is often impossible to form a billet under the condition of insufficient pressure. , at the same time, it is easy to cause cracking of the product during drying and high temperature sintering
At the same time, in the production of super-sized high-alumina ceramic balls, defects such as spots, blisters, sticking damage, and wind crystals are prone to appear on the appearance, and performance defects such as waist cracks, raw burning, and nail lines are prone to occur.

Method used

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  • Oversized high-alumina ceramic ball and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] According to the mass percentage, weigh 90% of Al 2 o 3 Powder, 5% CaCO 3 powder, 3% SrO 2 powder, 2% kaolin, of which Al 2 o 3 The powder purity is 95.0%, the particle size is 60nm, CaCO 3 The purity of the powder is 99.9%, the particle size is 50nm, SrO 2 The purity of powder is 99.9%, the particle size is 50nm, the purity of kaolin is 99.9%, the particle diameter is 50nm.

[0019] Will Al 2 o 3 Powder, CaCO 3 Powder, SrO 2 Powder and kaolin are put into a ball mill tank with polyurethane lining, and 10mm ceramic balls are loaded according to the ball-to-material ratio of 1.5, and Al 2 o 3 Powder, CaCO 3 Powder, SrO 2 0.8% of the total mass of powder and kaolin in deionized water, the filling rate of the ball mill tank is 75%, the control ball mill speed is 30 rpm, and the ball mill is carried out for 45 hours; the slurry after ball milling is transferred to the stirring container, and added to the ball mill Suspending agent with 1% slurry mass, stirred ...

Embodiment 2

[0021] According to the mass percentage, weigh 93.5% Al 2 o 3 Powder, 3.5% CaCO 3 powder, 2% SrO 2 powder, 1% kaolin, of which Al 2 o 3 The powder purity is 95.0%, the particle size is 100nm, CaCO 3 The purity of the powder is 99.9%, the particle size is 200nm, SrO 2 The purity of powder is 99.9%, the particle size is 200nm, the purity of kaolin is 99.9%, the particle diameter is 200nm.

[0022] Will Al 2 o 3 Powder, CaCO 3 Powder, SrO 2 Powder and kaolin are put into a ball mill tank with polyurethane lining, and 12mm ceramic balls are loaded according to the ball-to-material ratio of 1.5, and Al 2 o 3 Powder, CaCO 3 Powder, SrO 2 Powder, kaolin total mass of 0.8% deionized water, the filling rate of the ball milling tank is 75%, the ball milling speed is controlled to be 32 rpm, and the ball milling is carried out for 48 hours; the slurry after ball milling is transferred to the stirring container, and added to the ball milling Suspending agent with 2% slurry m...

Embodiment 3

[0024] According to the mass percentage, weigh 95.5% Al 2 o 3 Powder, 2.5% CaCO 3 powder, 1.2% SrO 2 powder, 0.8% kaolin, of which Al 2 o 3 Powder purity is 95.0%, particle size is 200nm, CaCO 3 The purity of the powder is 99.9%, the particle size is 400nm, SrO 2 The purity of powder is 99.9%, the particle size is 400nm, the purity of kaolin is 99.9%, the particle diameter is 500nm.

[0025] Will Al 2 o 3 Powder, CaCO 3 Powder, SrO 2Powder and kaolin are put into a ball mill tank with polyurethane lining, and 15mm ceramic balls are loaded according to the ball-to-material ratio of 1.5, and Al 2 o 3 Powder, CaCO 3 Powder, SrO 2 0.8% deionized water of powder and kaolin total mass, the filling rate of the ball milling tank is 75%, the ball milling speed is controlled to be 35 rpm, and the ball milling is carried out for 55 hours; the slurry after ball milling is transferred to the stirring container, and added to the ball mill Suspending agent with 2% slurry mass, ...

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Abstract

The invention belongs to the field of ceramic materials, and particularly relates to an oversized high-alumina ceramic ball and a preparation method thereof. The oversized high-alumina ceramic ball is prepared from the following components by mass: 90-96% of Al2O3 powder, 2-6% of CaCO3 powder, 1-3% of SrO2 powder and 0.5-2% of kaolin. The preparation method of the oversized high-alumina ceramic ball comprises the steps of ball milling, agent adding and stirring, high-position injection molding, fettling, microwave drying, high-temperature sintering and polishing. According to the invention, the preparation process is simple, the requirement for equipment is low, and the prepared high-alumina ceramic ball is large in size, compact in matrix, free of holes, smooth and clean in appearance, free of defects such as spots, bubbles and adhesion damage, not prone to cracking in the drying and sintering process and high in yield.

Description

technical field [0001] The invention belongs to the field of ceramic materials, and in particular relates to a super-large-sized high-alumina ceramic ball and a preparation method thereof. Background technique [0002] Alumina ceramic balls are special structural ceramics with the largest production scale and the most extensive application fields. They have the characteristics of high hardness, high density, low wear, corrosion resistance and high cost performance. They are widely used in construction, metallurgy, chemical industry, electronics and other fields. The high-alumina ceramic balls produced at home and abroad are mainly made of α-alumina powder as the main raw material, and are produced through ball milling, forming and high-temperature sintering. The forming methods mainly include semi-isostatic pressing, isostatic pressing and rolling. type, for the preparation of super-large-sized high-alumina ceramic balls (size greater than 300mm), due to size factors, during...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/117C04B35/622
CPCC04B35/117C04B35/622C04B2235/3208C04B2235/3213C04B2235/349C04B2235/5454C04B2235/5445C04B2235/656C04B2235/6567
Inventor 李旭东谢长清谢繁晔陈耀光
Owner 冷水江市佳晨电子陶瓷有限责任公司
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