Preparation method of high alumina ceramic material with microcosmic convex-concave and ploughing-type surface structure and product prepared by preparation method

A technology of high-alumina ceramics and surface structure, which is applied in the field of structural ceramics preparation, can solve the problems of easy-to-break yarn quality and decline in spinning, and achieve the effect of facilitating low-temperature sintering and increasing content

Inactive Publication Date: 2016-11-09
JINGDEZHEN CERAMIC INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the complete and high-hardness hexagonal plate-like crystal structure of corundum ceramics can also easily lead to greater friction betwe

Method used

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  • Preparation method of high alumina ceramic material with microcosmic convex-concave and ploughing-type surface structure and product prepared by preparation method
  • Preparation method of high alumina ceramic material with microcosmic convex-concave and ploughing-type surface structure and product prepared by preparation method
  • Preparation method of high alumina ceramic material with microcosmic convex-concave and ploughing-type surface structure and product prepared by preparation method

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Experimental program
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Effect test

Embodiment 1

[0025] Preparation of corundum ceramics with microscopic convex-convex and plow-like surface structure

[0026] The first step is the preparation of composite additives: magnesium oxide and potassium sodium feldspar are mixed in a weight ratio of 1:2, mixed evenly, heated to 1350°C to melt, and quenched to D 50 =1µm, dried to obtain composite additive powder;

[0027] The second step, ingredients: aluminum oxide powder (D 50 =1µm) 99wt%, composite additive 1wt%, plus 0.2wt% ammonium polyacrylate, weighed, added 30% water, ball milled and mixed evenly;

[0028] The third step, forming: using gypsum mold for grouting molding to make green body;

[0029] The fourth step, sintering: the green body is fired at 1700°C, and kept at the highest temperature for 30 minutes to obtain corundum ceramics with a water absorption rate of 0.1%;

[0030] The fifth step, surface processing: use diamond grinding wheel to process the surface of corundum ceramics to level 11 smoothness;

[0031...

Embodiment 2

[0034] Preparation of 95% alumina ceramics with micro-convex and plowed surface structure

[0035] The first step is the preparation of composite additives: magnesium oxide and potassium sodium feldspar are mixed in a weight ratio of 1:2, mixed evenly, heated to 1350°C to melt, and quenched to D 50 =1µm, dried to obtain composite additive powder;

[0036] The second step, ingredients: the alumina powder (D 50 =1µm) 94wt%, dried composite additive 6wt%, plus 0.3wt% oleic acid, weighed, dry ball milled and mixed for 6 hours, took it out and baked it at 110°C for 2 hours to obtain hot powder;

[0037] The third step, mixing wax: take 56°paraffin wax with a weight of 15wt% of the hot powder, melt it evenly in an aluminum bucket at 80°C, add the hot powder obtained in the second step while stirring, gradually add the hot powder, and add the hot powder to three After two-half, add 0.1wt% oleic acid, mix the hot powder and paraffin evenly, and get rid of the air bubbles in the wax ...

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Abstract

The invention discloses a preparation method of a high alumina ceramic material with a microcosmic convex-concave and ploughing-type surface structure and a product prepared by the preparation method. According to the preparation method, 1-6 wt% of a composite additive is introduced into alumina ceramic ingredients; and after moulding and through proper high-temperature sintering and grinding polishing processes, the high alumina ceramic material with the microcosmic convex-concave and ploughing-type surface structure is obtained. The surface of the material is a microcosmic convex-concave and ploughing-type surface structure. The convex-concave surface is smooth in transition and has no corner angle, and glossiness is about 45%. The high alumina ceramic material has a wide application prospect in the manufacture field of a low-friction ceramic yarn guide for a high-speed spinning machine.

Description

technical field [0001] The invention belongs to the field of preparation of structural ceramics, and in particular relates to a preparation method of a high-alumina ceramic material with a microscopic convex-convex and plow-like surface structure and a prepared product. Background technique [0002] High-alumina ceramic materials are widely used, and because of their ultra-high hardness, they are widely used in the field of wear resistance. With the rapid development of science and technology, more and higher requirements are put forward for the friction performance of high-alumina ceramic products. slide. For example, with the increase of spinning speed of textile machinery, the grain boundary of 99 alumina corundum ceramic material is narrower than that of 95 alumina ceramic, which can solve the shortcoming of 95 alumina ceramic that is easy to cause burrs in spinning. However, the complete and high-hardness hexagonal plate-like crystal structure of corundum ceramics can...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/622C04B35/63C04B35/64
CPCC04B35/10C04B35/622C04B35/6303C04B35/64C04B2235/3206C04B2235/3472C04B2235/5436C04B2235/612C04B2235/661C04B2235/96C04B2235/963
Inventor 石棋付江盛
Owner JINGDEZHEN CERAMIC INSTITUTE
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