CN104387034A - Aluminum oxide ceramic and preparation method thereof - Google Patents

Abstract

The invention discloses aluminum oxide ceramic. The aluminum oxide ceramic is prepared from the following raw materials in parts by weight: 5-7 parts of chongguang stone, 3-5 parts of celestite, 5-9 parts of gas phase silicon dioxide, 83-86 parts of aluminum oxide, 0.6-0.9 part of potassium oxide, 6-9 parts of electroquartz, 1-2 parts of talcum, 3-5 parts of nano zirconia, 3-4 parts of ethyl orthosilicate, a proper amount of deionized water, 1-2 parts of potassium hydroxide, a proper amount of ethyl alcohol and 4-6 parts of additives. By virtue of the application of gas phase silicon dioxide and nano zirconia in the aluminum oxide ceramic, the abrasion resistance and the heat resistance of the ceramic are improved; the ceramic has acid and alkali corrosion resistance and is long in service life; by virtue of the additives, the surface smoothness, the abrasion resistance and the heat resistance of the ceramic can be improved.

Description

A kind of alumina-ceramic and preparation method thereof

Technical field

The present invention relates to stupalith field, particularly relate to a kind of alumina-ceramic and preparation method thereof.

Background technology

The material of current passage, pipeline has aluminum alloy materials, pottery etc., and aluminum alloy materials wears no resistance, conduit evanescence, and often change, cost is high; Stupalith fragility used is at present large, and wear resistance is not too high, and cold-hot does not stimulate, and resistance to acids and bases is poor, and therefore need research wear resistance good, the stupalith of hardness is high, good toughness, and vibration resistance is heat-resisting, corrosion-resistant excellent performance of Denging, to reduce costs.

Summary of the invention

The object of the present invention is to provide a kind of alumina-ceramic and preparation method thereof, the wear resistance of this pottery and good heat resistance, acid-alkali-corrosive-resisting, long service life.

Technical scheme of the present invention is as follows:

A kind of alumina-ceramic, is characterized in that being made up of the raw material of following weight part: Chong Guang stone 5-7, lazurite 3-5, aerosil 5-9, aluminum oxide 83-86, potassium oxide 0.6-0.9, electroquartz 6-9, talcum 1-2, nano zircite 3-5, tetraethoxy 3-4, deionized water are appropriate, potassium hydroxide 1-2, appropriate amount of ethanol, auxiliary agent 4-6;

Described auxiliary agent is made up of the raw material of following weight part: kaolin 3-4, rare earth 1-2, zinc tetroxy chromate 0.3-0.4, nano-silicon nitride 0.8-1.2, nanometer boron fibre 0.6-0.9, nano-sized carbon 0.3-0.4, silane coupling agent kh-550 0.6-0.8, polyoxyethylene glycol 0.3-0.4, water 7-11, preparation method is: be added to the water by polyoxyethylene glycol, stir, add kaolin, stir 20-30 minute, add the silane coupling agent kh-550 of half weight part again, stir 10-15 minute, add rare earth again, stirring reaction 20-30 minute, add the silane coupling agent kh-550 of residuals weight part again, stir 10-15 minute, add other remaining components again, stirring reaction 20-30 minute, ultrasonic disperse 6-8 minute, filter, dry, pulverize, cross 40 mesh sieves, under nitrogen atmosphere, 2-3 hour is calcined at 1380-1440 DEG C, pulverize, cross 40 mesh sieves, obtain.

The preparation method of described alumina-ceramic, is characterized in that comprising the following steps:

(1) by Chong Guangshi, lazurite, electroquartz, talcum mixing, ball milling, crosses 200 mesh sieves, adds the ethanol of 0.6-0.8 times of weight part, send into ball milling 24-27 in ball mill individual hour, then add potassium hydroxide, continue ball milling 2-3 hour, being washed to pH value is 8-9, filters, obtains filter cake;

(2) filter cake (1) step obtained is pulverized, and under nitrogen atmosphere, calcines 2-3 hour, takes out and pulverize, cross 50 mesh sieves, obtain particle at 850-900 DEG C;

(3) ethanol of 30-40 weight part is got, add tetraethoxy, be stirred to dissolving, add aerosil, nano zircite, stir and obtain mixture, aluminum oxide limit is seethed stirring limit and spray into mixture, be heated to 70-80 DEG C, continue to seethe being stirred to ethanol and evaporating completely, pulverize, cross 50 mesh sieves, obtain particle;

(4) particle that (2) step and (3) step obtain is mixed with other remaining components, by material: ball: water=1:1.4:0.7, ball milling 24-30 hour, moulding, in nitrogen atmosphere, individual hour of pre-burning 1.5-2 at 700-800 DEG C, at 1680-1720 DEG C, calcine 4-5 hour again, to obtain final product.

Beneficial effect of the present invention

Alumina-ceramic of the present invention employs aerosil, nano zircite, the wear resistance of pottery and thermotolerance is improved, acid-alkali-corrosive-resisting, long service life; The auxiliary agent of the application of the invention, can increase the surface smoothness of pottery, wear resistance and thermotolerance.

Embodiment

A kind of alumina-ceramic, is made up of the raw material of following weight part (kilogram): Chong Guang stone 6, lazurite 4, aerosil 6, aluminum oxide 84, potassium oxide 0.7, electroquartz 7, talcum 1.5, nano zircite 4, tetraethoxy 3.5, deionized water are appropriate, potassium hydroxide 1.5, appropriate amount of ethanol, auxiliary agent 5;

Described auxiliary agent is made up of the raw material of following weight part (kilogram): kaolin 3.5, rare earth 1.5, zinc tetroxy chromate 0.3, nano-silicon nitride 1, nanometer boron fibre 0.7, nano-sized carbon 0.3, silane coupling agent kh-550 0.7, polyoxyethylene glycol 0.3, water 8; Preparation method is: be added to the water by polyoxyethylene glycol, stirs, and adds kaolin, stir 25 minutes, then add the silane coupling agent kh-550 of half weight part, stir 13 minutes, add rare earth again, stirring reaction 25 minutes, then the silane coupling agent kh-550 adding residuals weight part, stir 13 minutes, add other remaining components again, stirring reaction 25 minutes, ultrasonic disperse 7 minutes, filters, dry, pulverize, cross 40 mesh sieves, under nitrogen atmosphere, calcine 2.5 hours at 1400 DEG C, pulverize, cross 40 mesh sieves, to obtain final product.

The preparation method of described alumina-ceramic, comprises the following steps:

(1) by Chong Guangshi, lazurite, electroquartz, talcum mixing, ball milling, crosses 200 mesh sieves, adds the ethanol of 0.7 times of weight part, ball milling 25 hours in feeding ball mill, then add potassium hydroxide, continue ball milling 2.5 hours, being washed to pH value is 9, filters, obtains filter cake;

(2) filter cake (1) step obtained is pulverized, and under nitrogen atmosphere, calcines 2.5 hours at 880 DEG C, takes out and pulverize, cross 50 mesh sieves, obtain particle;

(3) ethanol of 35 weight parts is got, add tetraethoxy, be stirred to dissolving, add aerosil, nano zircite, stir and obtain mixture, aluminum oxide limit is seethed stirring limit and spray into mixture, be heated to 75 DEG C, continue to seethe being stirred to ethanol and evaporating completely, pulverize, cross 50 mesh sieves, obtain particle;

(4) particle that (2) step and (3) step obtain is mixed with other remaining components, by material: ball: water=1:1.4:0.7, ball milling 28 hours, moulding, in nitrogen atmosphere, pre-burning 1.8 hours at 750 DEG C, calcine 4.5 hours at 1690 DEG C again, to obtain final product.

Experimental data:

The Vickers' hardness of this embodiment pottery is 86GPa, and bending strength is 980MPa, and fracture toughness property is 12MPam ^1/2.

Claims (2)

1. an alumina-ceramic, is characterized in that being made up of the raw material of following weight part: Chong Guang stone 5-7, lazurite 3-5, aerosil 5-9, aluminum oxide 83-86, potassium oxide 0.6-0.9, electroquartz 6-9, talcum 1-2, nano zircite 3-5, tetraethoxy 3-4, deionized water are appropriate, potassium hydroxide 1-2, appropriate amount of ethanol, auxiliary agent 4-6;

Described auxiliary agent is made up of the raw material of following weight part: kaolin 3-4, rare earth 1-2, zinc tetroxy chromate 0.3-0.4, nano-silicon nitride 0.8-1.2, nanometer boron fibre 0.6-0.9, nano-sized carbon 0.3-0.4, silane coupling agent kh-550 0.6-0.8, polyoxyethylene glycol 0.3-0.4, water 7-11, preparation method is: be added to the water by polyoxyethylene glycol, stir, add kaolin, stir 20-30 minute, add the silane coupling agent kh-550 of half weight part again, stir 10-15 minute, add rare earth again, stirring reaction 20-30 minute, add the silane coupling agent kh-550 of residuals weight part again, stir 10-15 minute, add other remaining components again, stirring reaction 20-30 minute, ultrasonic disperse 6-8 minute, filter, dry, pulverize, cross 40 mesh sieves, under nitrogen atmosphere, 2-3 hour is calcined at 1380-1440 DEG C, pulverize, cross 40 mesh sieves, obtain.

2. the preparation method of alumina-ceramic according to claim 1, is characterized in that comprising the following steps:

(1) by Chong Guangshi, lazurite, electroquartz, talcum mixing, ball milling, crosses 200 mesh sieves, adds the ethanol of 0.6-0.8 times of weight part, send into ball milling 24-27 in ball mill individual hour, then add potassium hydroxide, continue ball milling 2-3 hour, being washed to pH value is 8-9, filters, obtains filter cake;

(2) filter cake (1) step obtained is pulverized, and under nitrogen atmosphere, calcines 2-3 hour, takes out and pulverize, cross 50 mesh sieves, obtain particle at 850-900 DEG C;

(3) ethanol of 30-40 weight part is got, add tetraethoxy, be stirred to dissolving, add aerosil, nano zircite, stir and obtain mixture, aluminum oxide limit is seethed stirring limit and spray into mixture, be heated to 70-80 DEG C, continue to seethe being stirred to ethanol and evaporating completely, pulverize, cross 50 mesh sieves, obtain particle;

(4) particle that (2) step and (3) step obtain is mixed with other remaining components, by material: ball: water=1:1.4:0.7, ball milling 24-30 hour, moulding, in nitrogen atmosphere, individual hour of pre-burning 1.5-2 at 700-800 DEG C, at 1680-1720 DEG C, calcine 4-5 hour again, to obtain final product.