CN108975896A - A kind of method that opoka prepares cordierite honeycomb ceramic - Google Patents
A kind of method that opoka prepares cordierite honeycomb ceramic Download PDFInfo
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- CN108975896A CN108975896A CN201810983497.1A CN201810983497A CN108975896A CN 108975896 A CN108975896 A CN 108975896A CN 201810983497 A CN201810983497 A CN 201810983497A CN 108975896 A CN108975896 A CN 108975896A
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/08—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by adding porous substances
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
- C04B35/16—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay
- C04B35/18—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on silicates other than clay rich in aluminium oxide
- C04B35/195—Alkaline earth aluminosilicates, e.g. cordierite or anorthite
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- C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
- C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
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- C04B38/0006—Honeycomb structures
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- C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
- C04B2235/30—Constituents and secondary phases not being of a fibrous nature
- C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
- C04B2235/3418—Silicon oxide, silicic acids, or oxide forming salts thereof, e.g. silica sol, fused silica, silica fume, cristobalite, quartz or flint
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Abstract
The present invention relates to a kind of methods that opoka prepares cordierite honeycomb ceramic, comprising the following steps: (1) by Modified Protein Earth: aluminium oxide: magnesia: the raw materials ball milling such as sintering aid obtains uniformly mixed powder；(2) water 75wt%, 12 wt% of carboxymethyl cellulose, 7 wt% of ethylene glycol, 3 wt% of odium stearate, 3 wt% of glycerol are first after mixing evenly obtained into mixed liquor；(3) 80 wt% of powder and mixed liquor 20wt% are obtained into pug in aging 36 hours after mixing；(4) pug is put into after carrying out mud refining in vacuum pugmill, places into single lead screw ex truding briquetting machine and forms；(5) the hygrometric state honeycomb ceramic body of extrusion forming is shaped into dry body；(6) honeycomb ceramic body dry body is put into calcining furnace, is fired, cooling is come out of the stove.The present invention uses opoka as major ingredient through the invention, again on the basis of add sintering aid, can effectively reduce the sintering temperature of cordierite ceramic honeycomb, improve mechanical strength, reduce thermal expansion coefficient.
Description
Technical field
The present invention relates to a kind of methods that opoka prepares cordierite honeycomb ceramic, belong to inorganic ceramic material field.
Background technique
Cordierite honeycomb ceramic is a kind of more and more extensive ceramic material of fast development, application surface at present, since its is huge
It is carrier that big specific surface area, low-expansion coefficient, high temperature resistant and the characteristics such as corrosion-resistant make it be used to prepare vehicle maintenance service, red
External radiation material, the accumulation of heat in power plant and large-scale cleaner industrially etc., also referred to as enviroment protective ceramic.Present violet is green
Stone ceramic honey comb is at high cost by adding other raw materials come adjuster content using kaolin, talcum, aluminium oxide as primary raw material.
Application publication number CN103508748A, denomination of invention: a kind of cordierite honeycomb ceramic and preparation method thereof, it includes 50-70 parts
Cordierite, 30-40 part kaolin, 1.8-3.5 parts of clays, 10-16 parts of talcums, 4-8 parts of magnesium carbonate, 1-3 parts of stearic acid and 5-10
Part deionized water.The cordierite honeycomb ceramic of the invention, it is not only cheap using special composition of raw materials, and comprehensive performance
It is excellent, there are the performances such as heat-resisting, wear-resisting, anticorrosion and insulation.But the invention uses cordierite for raw material, but cordierite is certainly
Exist seldom in right boundary, causes its preparation cost high, be unfavorable for promoting the use of.
Summary of the invention
The present invention provides a kind of method that opoka prepares cordierite honeycomb ceramic, solve existing cordierite ceramic at
The problems such as this height, intensity are low and thermal expansion coefficient is high.
In order to solve the above technical problems, the technical solution adopted by the present invention are as follows:
A kind of method that opoka prepares cordierite honeycomb ceramic, comprising the following steps:
(1) according to Modified Protein Earth: aluminium oxide: magnesia: the ratio of the weight ratio 55:30:14:1 of sintering aid, raw material
It is put into agate jar, with planetary ball mill with 300rpm ball milling 3h, obtains uniformly mixed powder；
(2) by water 75wt%, carboxymethyl cellulose 12wt%, ethylene glycol 7wt%, odium stearate 3wt%, glycerol 3wt%,
First after mixing evenly, mixed liquor is obtained；
(3) powder 80wt% and mixed liquor 20wt% are obtained into pug in aging 36 hours after mixing；
(4) pug is put into after carrying out mud refining in vacuum pugmill, places into single lead screw ex truding briquetting machine and forms；
(5) the hygrometric state honeycomb ceramic body of extrusion forming is put into stove dryness finalization into dry body；
(6) honeycomb ceramic body dry body is put into calcining furnace, is fired, cooling is come out of the stove, and cordierite honeycomb ceramic is both obtained.
Further, a preferred embodiment of the present invention are as follows: the sintering aid, in parts by weight, including 30-40 parts
Talcum, 20-30 part feldspar, 20-30 parts of kaolin, 1 part of cerium oxide, 3-5 parts of titanium dioxides.
Further, a preferred embodiment of the present invention are as follows: the preparation method of the Modified Protein Earth is a certain amount of to weigh
After 600 DEG C of roasting 2h of opoka, according to liquid-solid ratio be 3: 1 addition concentration be 40% sulfuric acid, stir evenly, 100 DEG C, reaction 2h,
Then it is rinsed with water to no sulfuric acid, it is dry.
Further, a preferred embodiment of the present invention are as follows: the firing is to be to slowly warm up to the rate of 0.3 DEG C/min
120 DEG C, 2 hours are kept the temperature, then with 0.5 DEG C/min, 300 DEG C is warming up to, keeps the temperature 2 hours, 1 DEG C/min rises to 600 DEG C, heat preservation 1
Hour, 5 DEG C/min rises to 1400 DEG C and keeps the temperature 3 hours, then furnace cooling.
Further, a preferred embodiment of the present invention are as follows: the preparation method of the sintering aid: (1) by talcum, length
Stone, kaolin distinguish 600 DEG C of roasting 2h after, according to liquid-solid ratio be 4: 1 be added concentration be 30% sulfuric acid, stir evenly, 100 DEG C,
2h is reacted, is then rinsed with water to no sulfuric acid, it is dry；It (2) will treated talcum, feldspar, kaolin, cerium oxide and titanium dioxide
It is uniformly mixed, then 4 DEG C/min rises to 1300 DEG C of heat preservations and is sintered for 3 hours, then furnace cooling；(4) the sinter powder that will be obtained
Broken, ball milling is to get sintering aid.
Beneficial effects of the present invention:
The present invention uses opoka as major ingredient through the invention, again on the basis of add sintering aid, sintering aid is adopted
With raw talcum, feldspar, kaolin, cerium oxide, white and titanium dioxide, and it carries out removal of impurities and sintering processes, so that obtained burning
Tying auxiliary agent has excellent performance, can effectively reduce the sintering temperature of cordierite ceramic honeycomb, improves mechanical strength, reduces
Thermal expansion coefficient.
Opoka is also known as opal, is the active silica of a kind of aqueous noncrystalline or colloid, is a kind of amorphous silicon
Matter mineral.Its chemical composition is SiO2.nH2O, wherein institute Si is amorphous structure, and main ingredient also contains small amounts in addition to Si
Iron, aluminium oxide, manganese, copper and organic impurities etc..Opal rock is made of atomic small opal sphere, there is the hole of relatively development
Gap has the features such as porosity is high, and water imbibition is strong, excellent adsorption.By modification, SiO2Content rises to 90% by 79%,
And voidage greatly improves.Cordierite honeycomb ceramic can effectively be improved as pore creating material as major ingredient using opoka
Voidage reduces the dosage of binder, and then improves the intensity of product.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical solution of the present invention is clearly and completely described, it is clear that institute
The embodiment of description is only a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention,
Every other embodiment obtained by those of ordinary skill in the art without making creative efforts, belongs to this hair
The range of bright protection.
Embodiment 1
A kind of method that opoka prepares cordierite honeycomb ceramic, comprising the following steps:
(1) according to Modified Protein Earth: aluminium oxide: magnesia: the ratio of the weight ratio 55:30:14:1 of sintering aid, raw material
It is put into agate jar, with planetary ball mill with 300rpm ball milling 3h, obtains uniformly mixed powder；
(2) by water 75wt%, carboxymethyl cellulose 12wt%, ethylene glycol 7wt%, odium stearate 3wt%, glycerol 3wt%,
First after mixing evenly, mixed liquor is obtained；
(3) powder 80wt% and mixed liquor 20wt% are obtained into pug in aging 36 hours after mixing；
(4) pug is put into after carrying out mud refining in vacuum pugmill, places into single lead screw ex truding briquetting machine and forms；
(5) the hygrometric state honeycomb ceramic body of extrusion forming is put into stove dryness finalization into dry body；
(6) honeycomb ceramic body dry body is put into calcining furnace, is fired, cooling is come out of the stove, and cordierite honeycomb ceramic is both obtained, described
Firing be to be to slowly warm up to 120 DEG C with the rate of 0.3 DEG C/min, keep the temperature 2 hours, then with 0.5 DEG C/min, be warming up to 300
DEG C, 2 hours are kept the temperature, 1 DEG C/min rises to 600 DEG C, keeps the temperature 1 hour, and 5 DEG C/min rises to 1400 DEG C and keeps the temperature 3 hours, then cold with furnace
But.
The preparation method of the Modified Protein Earth is after weighing 600 DEG C of roasting 2h of a certain amount of opoka, according to liquid-solid ratio
It is 40% sulfuric acid that concentration, which is added, for 3: 1, is stirred evenly, 100 DEG C, and 2h is reacted, and is then rinsed with water to no sulfuric acid, dry.
The sintering aid, in parts by weight, including 30 parts of talcums, 30 parts of feldspars, 25 parts of kaolin, 1 part of oxidation
Cerium, 3 parts of titanium dioxides.
The preparation method of the sintering aid: (1) after talcum, feldspar, kaolin being distinguished 600 DEG C of roasting 2h, according to
Liquid-solid ratio is that 4: 1 addition concentration are 30% sulfuric acid, stirs evenly, 100 DEG C, reacts 2h, be then rinsed with water to no sulfuric acid, does
It is dry；(2) by treated, talcum, feldspar, kaolin, cerium oxide and titanium dioxide are uniformly mixed, and then 4 DEG C/min rises to 1300 DEG C
It keeps the temperature 3 hours and is sintered, then furnace cooling；(4) obtained sinter is crushed, ball milling is to get sintering aid.
Embodiment 2
A kind of method that opoka prepares cordierite honeycomb ceramic, comprising the following steps:
(1) according to Modified Protein Earth: aluminium oxide: magnesia: the ratio of the weight ratio 55:30:14:1 of sintering aid, raw material
It is put into agate jar, with planetary ball mill with 300rpm ball milling 3h, obtains uniformly mixed powder；
(2) by water 75wt%, carboxymethyl cellulose 12wt%, ethylene glycol 7wt%, odium stearate 3wt%, glycerol 3wt%,
First after mixing evenly, mixed liquor is obtained；
(3) powder 80wt% and mixed liquor 20wt% are obtained into pug in aging 36 hours after mixing；
(4) pug is put into after carrying out mud refining in vacuum pugmill, places into single lead screw ex truding briquetting machine and forms；
(5) the hygrometric state honeycomb ceramic body of extrusion forming is put into stove dryness finalization into dry body；
(6) honeycomb ceramic body dry body is put into calcining furnace, is fired, cooling is come out of the stove, and cordierite honeycomb ceramic is both obtained, described
Firing be to be to slowly warm up to 120 DEG C with the rate of 0.3 DEG C/min, keep the temperature 2 hours, then with 0.5 DEG C/min, be warming up to 300
DEG C, 2 hours are kept the temperature, 1 DEG C/min rises to 600 DEG C, keeps the temperature 1 hour, and 5 DEG C/min rises to 1400 DEG C and keeps the temperature 3 hours, then cold with furnace
But.
The preparation method of the Modified Protein Earth is after weighing 600 DEG C of roasting 2h of a certain amount of opoka, according to liquid-solid ratio
It is 40% sulfuric acid that concentration, which is added, for 3: 1, is stirred evenly, 100 DEG C, and 2h is reacted, and is then rinsed with water to no sulfuric acid, dry.
The sintering aid, in parts by weight, including 35 parts of talcums, 25 parts of feldspars, 20 parts of kaolin, 1 part of oxidation
Cerium, 4 parts of titanium dioxides.
The preparation method of the sintering aid: (1) after talcum, feldspar, kaolin being distinguished 600 DEG C of roasting 2h, according to
Liquid-solid ratio is that 4: 1 addition concentration are 30% sulfuric acid, stirs evenly, 100 DEG C, reacts 2h, be then rinsed with water to no sulfuric acid, does
It is dry；(2) by treated, talcum, feldspar, kaolin, cerium oxide and titanium dioxide are uniformly mixed, and then 4 DEG C/min rises to 1300 DEG C
It keeps the temperature 3 hours and is sintered, then furnace cooling；(4) obtained sinter is crushed, ball milling is to get sintering aid.
Embodiment 3
A kind of method that opoka prepares cordierite honeycomb ceramic, comprising the following steps:
(1) according to Modified Protein Earth: aluminium oxide: magnesia: the ratio of the weight ratio 55:30:14:1 of sintering aid, raw material
It is put into agate jar, with planetary ball mill with 300rpm ball milling 3h, obtains uniformly mixed powder；
(2) by water 75wt%, carboxymethyl cellulose 12wt%, ethylene glycol 7wt%, odium stearate 3wt%, glycerol 3wt%,
First after mixing evenly, mixed liquor is obtained；
(3) powder 80wt% and mixed liquor 20wt% are obtained into pug in aging 36 hours after mixing；
(4) pug is put into after carrying out mud refining in vacuum pugmill, places into single lead screw ex truding briquetting machine and forms；
(5) the hygrometric state honeycomb ceramic body of extrusion forming is put into stove dryness finalization into dry body；
(6) honeycomb ceramic body dry body is put into calcining furnace, is fired, cooling is come out of the stove, and cordierite honeycomb ceramic is both obtained, described
Firing be to be to slowly warm up to 120 DEG C with the rate of 0.3 DEG C/min, keep the temperature 2 hours, then with 0.5 DEG C/min, be warming up to 300
DEG C, 2 hours are kept the temperature, 1 DEG C/min rises to 600 DEG C, keeps the temperature 1 hour, and 5 DEG C/min rises to 1400 DEG C and keeps the temperature 3 hours, then cold with furnace
But.
The preparation method of the Modified Protein Earth is after weighing 600 DEG C of roasting 2h of a certain amount of opoka, according to liquid-solid ratio
It is 40% sulfuric acid that concentration, which is added, for 3: 1, is stirred evenly, 100 DEG C, and 2h is reacted, and is then rinsed with water to no sulfuric acid, dry.
The sintering aid, in parts by weight, including 40 parts of talcums, 20 parts of feldspars, 30 parts of kaolin, 1 part of oxidation
Cerium, 5 parts of titanium dioxides.
The preparation method of the sintering aid: (1) after talcum, feldspar, kaolin being distinguished 600 DEG C of roasting 2h, according to
Liquid-solid ratio is that 4: 1 addition concentration are 30% sulfuric acid, stirs evenly, 100 DEG C, reacts 2h, be then rinsed with water to no sulfuric acid, does
It is dry；(2) by treated, talcum, feldspar, kaolin, cerium oxide and titanium dioxide are uniformly mixed, and then 4 DEG C/min rises to 1300 DEG C
It keeps the temperature 3 hours and is sintered, then furnace cooling；(4) obtained sinter is crushed, ball milling is to get sintering aid.
The cordierite ceramic performance for measuring embodiment 1-3, specifically see the table below.
| Thermal expansion coefficient/DEG C | Open porosity/% | Axial compression resistance/(MPa) | |
| Embodiment 1 | 1.38×10-6 | 62.3 | 13.5 |
| Embodiment 2 | 1.40×10-6 | 62.8 | 12.8 |
| Embodiment 3 | 1.41×10-6 | 63.1 | 12.6 |
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (5)
1. a kind of method that opoka prepares cordierite honeycomb ceramic, which comprises the following steps:
(1) according to Modified Protein Earth: aluminium oxide: magnesia: the ratio of the weight ratio 55:30:14:1 of sintering aid, raw material are put into
In agate jar, with planetary ball mill with 300rpm ball milling 3h, uniformly mixed powder is obtained；
(2) by water 75wt%, 12 wt% of carboxymethyl cellulose, 7 wt% of ethylene glycol, 3 wt % of odium stearate, 3 wt% of glycerol,
First after mixing evenly, mixed liquor is obtained；
(3) 80 wt% of powder and mixed liquor 20wt% are obtained into pug in aging 36 hours after mixing；
(4) pug is put into after carrying out mud refining in vacuum pugmill, places into single lead screw ex truding briquetting machine and forms；
(5) the hygrometric state honeycomb ceramic body of extrusion forming is put into stove dryness finalization into dry body；
(6) honeycomb ceramic body dry body is put into calcining furnace, is fired, cooling is come out of the stove, and cordierite honeycomb ceramic is both obtained.
2. the method that a kind of opoka according to claim 1 prepares cordierite honeycomb ceramic, it is characterised in that: described
Sintering aid, in parts by weight, including 30-40 parts of talcums, 20-30 parts of feldspars, 20-30 parts of kaolin, 1 part of cerium oxide, 3-5
Part titanium dioxide.
3. a kind of opoka according to claim 1 prepares cordierite ceramic, it is characterised in that:
It is 3 according to liquid-solid ratio after the preparation method of the Modified Protein Earth is weighs 600 DEG C of roasting 2h of a certain amount of opoka:
1 is added concentration as 40% sulfuric acid, stirs evenly, 100 DEG C, reacts 2h, is then rinsed with water to no sulfuric acid, dry.
4. a kind of opoka according to claim 1 prepares cordierite ceramic, it is characterised in that: the firing be with
The rate of 0.3 DEG C/min is to slowly warm up to 120 DEG C, keeps the temperature 2 hours, then with 0.5 DEG C/min, is warming up to 300 DEG C, heat preservation 2 is small
When, 1 DEG C/min rises to 600 DEG C, keeps the temperature 1 hour, and 5 DEG C/min rises to 1400 DEG C and keeps the temperature 3 hours, then furnace cooling.
5. a kind of opoka according to claim 1 prepares cordierite ceramic, it is characterised in that: the sintering aid
Preparation method: (1) by talcum, feldspar, kaolin distinguish 600 DEG C of roasting 2h after, according to liquid-solid ratio be 4: 1 be added concentration be 30%
Sulfuric acid stirs evenly, and 100 DEG C, reacts 2h, is then rinsed with water to no sulfuric acid, dry；(2) will treated talcum, feldspar,
Kaolin, cerium oxide and titanium dioxide are uniformly mixed, and then 4 DEG C/min rises to 1300 DEG C of heat preservations and is sintered for 3 hours, then cold with furnace
But；(4) obtained sinter is crushed, ball milling is to get sintering aid.
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Cited By (1)
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