CN108530101A - A kind of preparation method of high stomata dispersibility high-alumina insulated brick material - Google Patents
A kind of preparation method of high stomata dispersibility high-alumina insulated brick material Download PDFInfo
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- CN108530101A CN108530101A CN201810737006.5A CN201810737006A CN108530101A CN 108530101 A CN108530101 A CN 108530101A CN 201810737006 A CN201810737006 A CN 201810737006A CN 108530101 A CN108530101 A CN 108530101A
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- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/06—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by burning-out added substances by burning natural expanding materials or by sublimating or melting out added substances
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Abstract
The present invention relates to a kind of preparation methods of high stomata dispersibility high-alumina insulated brick material, belong to heat-barrier material technical field.Technical solution of the present invention is filled by preparing silicon dioxide gel system and being used as basic system to high-alumina insulated brick material internal, due to its presence, so that the hole of material and storeroom is filled by aerosil, contacting with each other between elimination material granule, because intergranular contact can influence stomata material internal dispersion performance, reduce the mechanical property of material, and the contact between material granule will produce heat bridge effect, increase the solid phase heat transfer of fiber, reduce the heat-proof quality of material, so being effectively improved the heat-proof quality of material using silicon dioxide gel.
Description
Technical field
The present invention relates to a kind of preparation methods of high stomata dispersibility high-alumina insulated brick material, belong to heat-barrier material technology neck
Domain.
Background technology
Light weight alumina insulating brick is a kind of lightweight, high-strength, low heat conductivity material, is had compared with dense material low close
The features such as degree, low heat conductivity, excellent thermal insulation performance.There is intensity height, temperature in use height etc. compared with common heat-barrier material
Feature can not only do thermal insulation layer, can also be the ideal inner lining material of light-duty high temperature kiln with direct flame contact.Due to
Its abundant raw materials, relative low price are widely used in various calcining kilns, heating device, the thermal insulation layer of soaking pit and interior
Lining increases the accumulation of heat effect of kiln and alleviates the weight of kiln, in the society of current energy shortages, has hair well
Exhibition foreground and research significance.
Using powder raw material, selects degumming agent appropriate (deflocculant) that it is made to be uniformly suspended in solution, be tuned into mud
Slurry, has been poured into water imbibition and has had in model (generally plaster mold) and suck moisture, forms green body by mould shapes, this method is known as note
Sizing process.Grouting process can be such that powder is preferably mixed with pore creating material, manufactured porous material even air hole distribution, and equipment letter
It is single, thus this technique is also to prepare the common method of porous material.The key problem in technology of the technique is the preparation of slurry.It is molded into
The great advantage of type is simple and convenient, if the quality requirement to product is not high, smaller sheet, bulk or tubulose porous pottery
It is prepared by the method that town of porcelain can use compression molding.High alumina heat-barrier material belongs to one kind in porous material, is led existing for porous material
Wanting problem is：Intensity reduces with the reduction of unit weight, and in addition temperature in use is low, and seldom energy and direct flame contact.Cause
The emphasis that this develops high intensity, the light heat-insulating material of low unit weight is our work.
Invention content
The technical problems to be solved by the invention：For the existing light weeight alumina brick strength of materials not high and temperature in use compared with
Low, the low problem of capacity provides a kind of preparation method of high stomata dispersibility high-alumina insulated brick material.
In order to solve the above technical problems, the technical solution adopted by the present invention is：
（1）It counts in parts by weight, weighs 45~50 parts of absolute ethyl alcohols, 10~15 parts of ethyl orthosilicates, 3~5 parts of quality point respectively
Several 5% acetums and 25~30 parts of deionized waters are placed in beaker, are stirred simultaneously 2~3h of hydrolysis, are collected hydrolyzate
And ammonium hydroxide is added dropwise and is placed in hydrolyzate, it after being added dropwise to complete, is stirred juxtaposition and stands at room temperature, obtain matrix sol solutions；
（2）It counts in parts by weight, weighs 45~50 parts of absolute ethyl alcohols, 3~5 parts of aluminum nitrates and 25~30 parts of propylene oxide respectively and set
It in conical flask, is stirred juxtaposition and stands at room temperature, obtain modified gel and in mass ratio 1:5, by modified gel and base
Body sol solutions are stirred, ultrasonic disperse, collect dispersion sol liquid；
（3）Count in parts by weight, weigh respectively 45~50 parts of aluminium oxide, 25~30 parts of clays, 10~15 parts of mullites and 25~
30 parts of dispersion sol liquid are placed in blender, are stirred and are placed in 40~48h of ageing mixture in polybag, are then poured into mould
In tool, 40~48h is conserved at room temperature；
（4）It waits after the completion of conserving, is dried, then the heating that heats up, after insulation reaction, then secondary temperature elevation, 1~2h of heat preservation calcining is simultaneously
Standing is cooled to room temperature, you can is prepared into the high stomata dispersibility high-alumina insulated brick material.
Step（1）The ammonium hydroxide drop rate is 10~15mL/min.
Step（4）The heating is heated to be is warming up to 400~500 DEG C by 5 DEG C/min.
Step（4）The secondary temperature elevation is by 8 DEG C/min secondary temperature elevations to 1400~1500 DEG C.
Compared with other methods, advantageous effects are the present invention：
（1）Technical solution of the present invention is filled by preparing silicon dioxide gel system and being used as basic system to high-alumina insulated brick material
Material is internal, due to its presence so that the hole of material and storeroom is filled by aerosil, eliminate material granule it
Between contact with each other because intergranular contact can influence stomata in the dispersion performance of material internal, reduce the mechanical property of material
Can, and the contact between material granule will produce heat bridge effect, increases the solid phase heat transfer of fiber, reduces the thermal insulation of material
Can, so being effectively improved the heat-proof quality of material using silicon dioxide gel；
（2）Technical solution of the present invention is formed bulk gas and effectively overflowed, passed through by fast decoupled under modified gel again high temperature
Structure of the gas overflowing between material granule effectively adjusts and forms the evenly dispersed further stomata dispersibility for improving material
Energy.
Specific implementation mode
It counts in parts by weight, weighs 45~50 parts of absolute ethyl alcohols, 10~15 parts of ethyl orthosilicates, 3~5 parts of quality point respectively
Several 5% acetums and 25~30 parts of deionized waters are placed in beaker, are stirred simultaneously 2~3h of hydrolysis, are collected hydrolyzate
And 5% ammonium hydroxide of mass fraction is added dropwise and is placed in hydrolyzate, control drop rate is that 10~15mL/min is stirred after being added dropwise to complete
It mixes mixing juxtaposition and stands 6~8h at room temperature, obtain matrix sol solutions；It counts in parts by weight, weighs 45~50 parts of anhydrous second respectively
Alcohol, 3~5 parts of aluminum nitrates and 25~30 parts of propylene oxide are placed in conical flask, be stirred juxtaposition stand 25 at room temperature~
30min obtains modified gel and in mass ratio 1:5, modified gel and matrix sol solutions are stirred, surpassed at 200~300W
Sound disperses 10~15min, collects dispersion sol liquid；Count in parts by weight, weigh respectively 45~50 parts of aluminium oxide, 25~30 parts it is viscous
Soil, 10~15 parts of mullites and 25~30 parts of dispersion sol liquid are placed in blender, are stirred and are placed in ageing mixture in polybag
40~48h is then poured into mold, after conserving 40~48h at room temperature, at 100~110 DEG C after dry 3~5h,
400~500 DEG C are warming up to by 5 DEG C/min, after 1~2h of insulation reaction, then by 8 DEG C/min secondary temperature elevations to 1400~1500 again
DEG C, heat preservation is calcined 1~2h and is stood and is cooled to room temperature, you can is prepared into the high stomata dispersibility high-alumina insulated brick material.
It counts in parts by weight, it is molten to weigh 45 parts of absolute ethyl alcohols, 10 parts of ethyl orthosilicates, 3 parts of 5% acetic acid of mass fraction respectively
Liquid and 25 parts of deionized waters are placed in beaker, are stirred and simultaneously 5% ammonia of mass fraction is added dropwise in hydrolysis 2h, collection hydrolyzate
Water is placed in hydrolyzate, and control drop rate is that 10mL/min is stirred juxtaposition and stands at room temperature after being added dropwise to complete
6h obtains matrix sol solutions；It counts in parts by weight, weighs 45 parts of absolute ethyl alcohols, 3 parts of aluminum nitrates and 25 parts of propylene oxide respectively and be placed in
It in conical flask, is stirred juxtaposition and stands 25min at room temperature, obtain modified gel and in mass ratio 1:5, by modified gel with
Matrix sol solutions are stirred, the ultrasonic disperse 10min at 200W, collect dispersion sol liquid；It counts, weighs respectively in parts by weight
45 parts of aluminium oxide, 25 parts of clays, 10 parts of mullites and 25 parts of dispersion sol liquid are placed in blender, are stirred and are placed in plastics
Ageing mixture 40h in bag, is then poured into mold, after conserving 40h at room temperature, at 100 DEG C after dry 3h, then by 5 DEG C/
Min is warming up to 400 DEG C, and after insulation reaction 1h, then by 8 DEG C/min secondary temperature elevations to 1400 DEG C, heat preservation calcining 1h simultaneously stands cooling
To room temperature, you can be prepared into the high stomata dispersibility high-alumina insulated brick material.
It counts in parts by weight, it is molten to weigh 47 parts of absolute ethyl alcohols, 12 parts of ethyl orthosilicates, 4 parts of 5% acetic acid of mass fraction respectively
Liquid and 25~30 parts of deionized waters are placed in beaker, are stirred and simultaneously mass fraction is added dropwise in hydrolysis 2h, collection hydrolyzate
5% ammonium hydroxide is placed in hydrolyzate, and control drop rate is that 12mL/min is stirred juxtaposition at room temperature after being added dropwise to complete
7h is stood, matrix sol solutions are obtained；It counts in parts by weight, weighs 47 parts of absolute ethyl alcohols, 4 parts of aluminum nitrates and 27 parts of propylene oxide respectively
It is placed in conical flask, is stirred juxtaposition and stands 27min at room temperature, obtain modified gel and in mass ratio 1:5, it will be modified solidifying
Glue is stirred with matrix sol solutions, the ultrasonic disperse 12min at 250W, collects dispersion sol liquid；It counts in parts by weight, respectively
It weighs 44 parts of aluminium oxide, 27 parts of clays, 12 parts of mullites and 27 parts of dispersion sol liquid to be placed in blender, is stirred and is placed in
Ageing mixture 44h in polybag, is then poured into mold, after conserving 44h at room temperature, at 105 DEG C after dry 4h, then is pressed
5 DEG C/min is warming up to 450 DEG C, and after insulation reaction 2h, then by 8 DEG C/min secondary temperature elevations to 1450 DEG C, heat preservation calcining 2h is simultaneously stood
It is cooled to room temperature, you can be prepared into the high stomata dispersibility high-alumina insulated brick material.
It counts in parts by weight, it is molten to weigh 50 parts of absolute ethyl alcohols, 15 parts of ethyl orthosilicates, 5 parts of 5% acetic acid of mass fraction respectively
Liquid and 30 parts of deionized waters are placed in beaker, are stirred and simultaneously 5% ammonia of mass fraction is added dropwise in hydrolysis 3h, collection hydrolyzate
Water is placed in hydrolyzate, and control drop rate is that 15mL/min is stirred juxtaposition and stands at room temperature after being added dropwise to complete
8h obtains matrix sol solutions；It counts in parts by weight, weighs 50 parts of absolute ethyl alcohols, 5 parts of aluminum nitrates and 30 parts of propylene oxide respectively and be placed in
It in conical flask, is stirred juxtaposition and stands 30min at room temperature, obtain modified gel and in mass ratio 1:5, by modified gel with
Matrix sol solutions are stirred, the ultrasonic disperse 15min at 300W, collect dispersion sol liquid；It counts, weighs respectively in parts by weight
50 parts of aluminium oxide, 30 parts of clays, 15 parts of mullites and 30 parts of dispersion sol liquid are placed in blender, are stirred and are placed in plastics
Ageing mixture 48h in bag, is then poured into mold, after conserving 48h at room temperature, at 110 DEG C after dry 5h, then by 5 DEG C/
Min is warming up to 500 DEG C, and after insulation reaction 2h, then by 8 DEG C/min secondary temperature elevations to 1500 DEG C, 1~2h of heat preservation calcining is simultaneously stood cold
But to room temperature, you can be prepared into the high stomata dispersibility high-alumina insulated brick material.
Example 1,2,3 prepared by the present invention is tested for the property, specific test result is as follows shown in table table 1：
1 performance test table of table
As seen from the above table, the heat-insulated brick that prepared by the present invention has excellent heat-proof quality and mechanical strength.
Claims (4)
1. a kind of preparation method of high stomata dispersibility high-alumina insulated brick material, it is characterised in that specifically preparation process is：
（1）It counts in parts by weight, weighs 45~50 parts of absolute ethyl alcohols, 10~15 parts of ethyl orthosilicates, 3~5 parts of quality point respectively
Several 5% acetums and 25~30 parts of deionized waters are placed in beaker, are stirred simultaneously 2~3h of hydrolysis, are collected hydrolyzate
And ammonium hydroxide is added dropwise and is placed in hydrolyzate, it after being added dropwise to complete, is stirred juxtaposition and stands at room temperature, obtain matrix sol solutions；
（2）It counts in parts by weight, weighs 45~50 parts of absolute ethyl alcohols, 3~5 parts of aluminum nitrates and 25~30 parts of propylene oxide respectively and set
It in conical flask, is stirred juxtaposition and stands at room temperature, obtain modified gel and in mass ratio 1:5, by modified gel and base
Body sol solutions are stirred, ultrasonic disperse, collect dispersion sol liquid；
（3）Count in parts by weight, weigh respectively 45~50 parts of aluminium oxide, 25~30 parts of clays, 10~15 parts of mullites and 25~
30 parts of dispersion sol liquid are placed in blender, are stirred and are placed in 40~48h of ageing mixture in polybag, are then poured into mould
In tool, 40~48h is conserved at room temperature；
（4）It waits after the completion of conserving, is dried, then the heating that heats up, after insulation reaction, then secondary temperature elevation, 1~2h of heat preservation calcining is simultaneously
Standing is cooled to room temperature, you can is prepared into the high stomata dispersibility high-alumina insulated brick material.
2. a kind of preparation method of high stomata dispersibility high-alumina insulated brick material according to claim 1, it is characterised in that：
Step（1）The ammonium hydroxide drop rate is 10~15mL/min.
3. a kind of preparation method of high stomata dispersibility high-alumina insulated brick material according to claim 1, it is characterised in that：
Step（4）The heating is heated to be is warming up to 400~500 DEG C by 5 DEG C/min.
4. a kind of preparation method of high stomata dispersibility high-alumina insulated brick material according to claim 1, it is characterised in that：
Step（4）The secondary temperature elevation is by 8 DEG C/min secondary temperature elevations to 1400~1500 DEG C.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810737006.5A CN108530101A (en) | 2018-07-06 | 2018-07-06 | A kind of preparation method of high stomata dispersibility high-alumina insulated brick material |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810737006.5A CN108530101A (en) | 2018-07-06 | 2018-07-06 | A kind of preparation method of high stomata dispersibility high-alumina insulated brick material |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1669979A (en) * | 2005-03-14 | 2005-09-21 | 浙江大学 | Preparation method of silica alumina gel bonding agent for corundum-mullite composite ceramic |
| CN102503508A (en) * | 2011-10-27 | 2012-06-20 | 中钢集团洛阳耐火材料研究院有限公司 | Method for preparing alumina nanometer porous thermal insulation materials |
-
2018
- 2018-07-06 CN CN201810737006.5A patent/CN108530101A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1669979A (en) * | 2005-03-14 | 2005-09-21 | 浙江大学 | Preparation method of silica alumina gel bonding agent for corundum-mullite composite ceramic |
| CN102503508A (en) * | 2011-10-27 | 2012-06-20 | 中钢集团洛阳耐火材料研究院有限公司 | Method for preparing alumina nanometer porous thermal insulation materials |
Non-Patent Citations (1)
| Title |
|---|
| 郝志显等: "以无机铝盐为前驱体用溶胶凝胶法合成中孔氧化铝", 《物理化学学报》 * |
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Application publication date: 20180914 |