CN104355650A - Cracking-resistant ceramic for nozzles and preparation method of crack-resisting ceramic - Google Patents

Abstract

The invention relates to a cracking-resistant ceramic for nozzles. The cracking-resistant ceramic is prepared from the following raw materials in parts by weight: 4-5 parts of tetrapod-like zinc oxide whiskers, 1-2 parts of saltpeter, 2-3 parts of limestone, 2-3 parts of AIF, 25-29 parts of potassium feldspar, 13-18 parts of quartz, 7-11 parts of marble, 50-60 parts of kaolin, a proper amount of deionized water, 3-4 parts of ethyl orthosilicate, a proper amount of ethyl alcohol and 4-6 parts of an auxiliary. As the tetrapod-like zinc oxide whiskers are added, the cracking resistance and the rapid cooling resistance of the ceramic are improved. The nozzle made of the ceramic resists abrasion, the processing temperature can be constantly changed, and the nozzle is not easily cracked and broken. As the auxiliary is used, the surface smoothness, the abrasion resistance and the heat resistance of the ceramic can be improved.

Description

A kind of nozzle cracking resistance pottery and preparation method thereof

Technical field

The present invention relates to stupalith field, particularly relate to a kind of nozzle cracking resistance pottery and preparation method thereof.

Background technology

Nozzle will be worn for a long time, and the material of current nozzle has aluminum alloy materials, pottery etc., and aluminum alloy materials wears no resistance, 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 nozzle cracking resistance pottery and preparation method thereof, the cracking resistance of this pottery and the excellent performance of anti-chilling, not only wear-resisting, fragmentation not easy to crack.

Technical scheme of the present invention is as follows:

A kind of nozzle cracking resistance pottery, is characterized in that being made up of the raw material of following weight part: four acicular type zinc oxide crystal whisker 4-5, nitre 1-2, Wingdale 2-3, AlF2-3, potassium felspar sand 25-29, quartzy 13-18, marble 7-11, kaolin 50-60, deionized water are appropriate, tetraethoxy 3-4, appropriate amount of ethanol, auxiliary agent 4-6;

Described auxiliary agent is made up of the raw material of following weight part: kaolin 0.7-0.9, zircon 3-4, lanthanum trioxide 0.2-0.3, bortz powder 0.2-0.3, Y2O3 0.2-0.4, La2O3 0.2-0.4, beryllium oxide 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: pulverized by zircon, crosses 100 mesh sieves, obtains zircon powder; Polyoxyethylene glycol is added to the water, stirs, add zircon powder, stir 20-30 minute, then add the silane coupling agent kh-550 of half weight part, stir 10-15 minute, add kaolin again, stirring reaction 20-30 minute, then the silane coupling agent kh-550 adding residuals weight part, 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, to obtain final product.

The preparation method of described nozzle cracking resistance pottery, is characterized in that comprising the following steps:

(1) by nitre, Wingdale, potassium felspar sand, quartz, marble mixing, ball milling, crosses 200 mesh sieves, adds the ethanol of 0.6-0.8 times of weight part, sends into ball milling 24-27 in ball mill individual hour, adds AlF, continues ball milling 2-3 hour, obtains ball milling material;

(2) the ball milling material (1) step obtained is pulverized, and under nitrogen atmosphere, calcines 2-3 hour, takes out and pulverize, cross 50 mesh sieves, obtain particle at 750-800 DEG C;

(3) ethanol of 30-40 weight part is got, add tetraethoxy, be stirred to dissolving, add four acicular type zinc oxide crystal whisker, stir and obtain mixture, kaolin 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, individual hour of pre-burning 1.5-2 at 700-800 DEG C, then at 1360-1420 DEG C, calcine 4-5 hour, to obtain final product.

Beneficial effect of the present invention

Pottery of the present invention with the addition of four acicular type zinc oxide crystal whisker, adds the cracking resistance of pottery and the performance of anti-chilling; Use the nozzle of this ceramic making, not only wear-resisting, and also processing temperature can constantly change, fragmentation not easy to crack; The auxiliary agent of the application of the invention, can increase the surface smoothness of pottery, wear resistance and thermotolerance.

Embodiment

A kind of nozzle cracking resistance pottery, is made up of the raw material of following weight part (kilogram): four acicular type zinc oxide crystal whisker 4.5, nitre 1.5, Wingdale 2.5, AlF2.5, potassium felspar sand 27, quartz 15, marble 8, kaolin 55, deionized water are appropriate, tetraethoxy 3.5, appropriate amount of ethanol, auxiliary agent 5;

Described auxiliary agent is made up of the raw material of following weight part (kilogram): kaolin 0.8, zircon 3.5, lanthanum trioxide 0.2, bortz powder 0.2, Y2O3 0.3, La2O3 0.3, beryllium oxide 0.3, silane coupling agent kh-550 0.7, polyoxyethylene glycol 0.3, water 8; Preparation method is: pulverized by zircon, crosses 100 mesh sieves, obtains zircon powder; Polyoxyethylene glycol is added to the water, stirs, add zircon powder, stir 25 minutes, add the silane coupling agent kh-550 of half weight part again, stir 13 minutes, then add kaolin, stirring reaction 25 minutes, add the silane coupling agent kh-550 of residuals weight part again, stir 13 minutes, then add other remaining components, stirring reaction 25 minutes, ultrasonic disperse 7 minutes, filters, and dries, and pulverizes, 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 nozzle cracking resistance pottery, comprises the following steps:

(1) by nitre, Wingdale, potassium felspar sand, quartz, marble mixing, ball milling, crosses 200 mesh sieves, adds the ethanol of 0.7 times of weight part, and in feeding ball mill, ball milling 26 hours, adds AlF, continues ball milling 2.5 hours, obtains ball milling material;

(2) the ball milling material (1) step obtained is pulverized, and under nitrogen atmosphere, calcines 2.5 hours at 780 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 four acicular type zinc oxide crystal whisker, stir and obtain mixture, kaolin 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, pre-burning 1.9 hours at 750 DEG C, then calcine 4.5 hours at 1400 DEG C, to obtain final product.

Experimental data:

The Vickers' hardness of this embodiment pottery is 85GPa, and bending strength is 920MPa, and fracture toughness property is 11MPam ^1/2.

Claims (2)

1. nozzle cracking resistance pottery, is characterized in that being made up of the raw material of following weight part: four acicular type zinc oxide crystal whisker 4-5, nitre 1-2, Wingdale 2-3, AlF2-3, potassium felspar sand 25-29, quartzy 13-18, marble 7-11, kaolin 50-60, deionized water are appropriate, tetraethoxy 3-4, appropriate amount of ethanol, auxiliary agent 4-6;

Described auxiliary agent is made up of the raw material of following weight part: kaolin 0.7-0.9, zircon 3-4, lanthanum trioxide 0.2-0.3, bortz powder 0.2-0.3, Y2O3 0.2-0.4, La2O3 0.2-0.4, beryllium oxide 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: pulverized by zircon, crosses 100 mesh sieves, obtains zircon powder; Polyoxyethylene glycol is added to the water, stirs, add zircon powder, stir 20-30 minute, then add the silane coupling agent kh-550 of half weight part, stir 10-15 minute, add kaolin again, stirring reaction 20-30 minute, then the silane coupling agent kh-550 adding residuals weight part, 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, to obtain final product.

2. the nozzle preparation method of cracking resistance pottery according to claim 1, is characterized in that comprising the following steps:

(1) by nitre, Wingdale, potassium felspar sand, quartz, marble mixing, ball milling, crosses 200 mesh sieves, adds the ethanol of 0.6-0.8 times of weight part, sends into ball milling 24-27 in ball mill individual hour, adds AlF, continues ball milling 2-3 hour, obtains ball milling material;

(2) the ball milling material (1) step obtained is pulverized, and under nitrogen atmosphere, calcines 2-3 hour, takes out and pulverize, cross 50 mesh sieves, obtain particle at 750-800 DEG C;

(3) ethanol of 30-40 weight part is got, add tetraethoxy, be stirred to dissolving, add four acicular type zinc oxide crystal whisker, stir and obtain mixture, kaolin 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, individual hour of pre-burning 1.5-2 at 700-800 DEG C, then at 1360-1420 DEG C, calcine 4-5 hour, to obtain final product.