CN111233334B - Preparation method of anorthite-quartz-glass phase multiphase ceramic - Google Patents

Preparation method of anorthite-quartz-glass phase multiphase ceramic Download PDF

Info

Publication number
CN111233334B
CN111233334B CN202010114339.XA CN202010114339A CN111233334B CN 111233334 B CN111233334 B CN 111233334B CN 202010114339 A CN202010114339 A CN 202010114339A CN 111233334 B CN111233334 B CN 111233334B
Authority
CN
China
Prior art keywords
fly ash
quartz
anorthite
ceramic
phase
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
CN202010114339.XA
Other languages
Chinese (zh)
Other versions
CN111233334A (en
Inventor
史志铭
韩超
闫华
王文彬
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Inner Mongolia Zhanhua Technology Co ltd
Inner Mongolia University of Technology
Original Assignee
Inner Mongolia Zhanhua Technology Co ltd
Inner Mongolia University of Technology
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Inner Mongolia Zhanhua Technology Co ltd, Inner Mongolia University of Technology filed Critical Inner Mongolia Zhanhua Technology Co ltd
Priority to CN202010114339.XA priority Critical patent/CN111233334B/en
Publication of CN111233334A publication Critical patent/CN111233334A/en
Application granted granted Critical
Publication of CN111233334B publication Critical patent/CN111233334B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
    • C03C10/0063—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing waste materials, e.g. slags
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P40/00—Technologies relating to the processing of minerals
    • Y02P40/60—Production of ceramic materials or ceramic elements, e.g. substitution of clay or shale by alternative raw materials, e.g. ashes

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Dispersion Chemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

The invention discloses a preparation method of anorthite-quartz-glass phase multiphase ceramic, which comprises the following raw materials of desert sand, fly ash, kaolin and cellulose. The complex phase ceramic material of anorthite-quartz-glass phase prepared by the invention has the apparent porosity of 0.5-7%, the bending strength of 70-130MPa and the thermal expansion coefficient of (3.0-7.4) x 10‑6The temperature per DEG C can be used for manufacturing conveying pipelines, bin linings, heat insulation boards, kiln materials and the like in the industries of machinery, chemical engineering, metallurgy, environmental protection and the like, and can also be used for road paving in cities and towns and villages, building decoration and the like.

Description

Preparation method of anorthite-quartz-glass phase multiphase ceramic
Technical Field
The invention relates to the technical field of complex phase ceramics. In particular to a preparation method of anorthite-quartz-glass phase multiphase ceramic.
Background
The oxide-based ceramics mainly depend on mineral raw materials such as quartz, alumina, magnesia, kaolin, montmorillonite, feldspar and limestone. The increase in the amount of ceramic used requires the exploitation of a large amount of mineral resources. The natural desert occupies a large amount of land resources, and the desert aeolian sand mainly contains a silicon oxide component and also contains a certain amount of components such as aluminum oxide, calcium oxide, sodium oxide, iron oxide and the like, so that the aeolian sand is applied to ceramic production, minerals and land resources can be saved, and idle desert resources can be fully utilized. Ceramics with quartz, cordierite, mullite and the like as main crystal phases and composite ceramics such as olivine-silicon carbide and the like are respectively synthesized by using aeolian sand as a raw material and matching with other auxiliary raw materials through material preparation, ball milling, green pressing and sintering. Honeycomb ceramics have also been reported to be prepared from aeolian sand, shale, calcite, sodium/potassium feldspar as raw materials, and the main crystal phase of the sintered ceramics is tridymite, and a small amount of anorthite and calcium silicate crystals.
On the other hand, the pulverized coal ash formed after the pulverized coal of the boiler of the thermal power plant is combusted contains mullite, quartz, calcium oxide, iron oxide and other components and can also be used as a ceramic raw material. The use of fly ash and quartz sand to prepare glass ceramics containing a stable anorthite phase has been reported.
The composite ceramic has a more reasonable microstructure and excellent physical and mechanical properties than single-phase ceramic, for example, the compactness of the anorthite-introduced oxide ceramic is increased, and the mechanical and thermal properties are obviously improved; using quartz, wollastonite or calcium aluminate, Al2O3The raw materials of kyanite and kaolin, namely wollastonite, calcium aluminate and the raw materials of the aluminum-silicon system react at high temperature to generate an anorthite phase, and the anorthite phase, the anorthite phase and a small amount of corundum phase are sintered at 1400 ℃; and the anorthite/mullite complex-phase porous light refractory material with excellent performance can be prepared by adding starch. Calcium sulfate is added into kaolin, quartz and other raw materials and then sintered at 1240 ℃ to obtain anorthite and mullite composite ceramic; 5 percent of desulfurized gypsum is doped to sinter the anorthite/mullite composite ceramic at 1200-1240 ℃, but the gypsum releases sulfur dioxide when being heated to cause the pollution of the atmospheric environment. The anorthite ceramic containing a small amount of quartz phase is obtained by sintering kaolin, wollastonite and a sintering promoter at 1000 ℃. With SiO2、CaCO3And Al (OH)3Adding polystyrene, wood chips and graphite pore-forming agent as raw materials, firing at 1450 ℃ to obtain anorthite/mullite complex-phase light refractory material, using aluminate cement and portland cement clinker as raw materials, preparing microporous anorthite ceramic by adopting a slip casting method, sintering and the like, wherein the apparent porosity of the ceramic synthesized by sintering at 1250 ℃ is 60 percent, and the density is 1.13g/cm3Compressive strength 15MPa in terms of Al (OH)3Sintering a sample which is an aluminum source at 1400 ℃ can obtain a single-phase anorthite phase.
Although the above complex phase ceramic material avoids the disadvantages of the single phase anorthite ceramic and the single phase quartz ceramic in terms of sintering property, physical property and mechanical property, such as high sintering temperature, low density, green body sintering cracking, high thermal expansion coefficient and low strength, the research on the complex phase ceramic is mostly feldspar phase-mullite complex phase ceramic, quartz phase-anorthite complex phase ceramic and the like, and the problems of high thermal expansion coefficient and low strength still cannot be avoided.
Disclosure of Invention
Therefore, the technical problem to be solved by the invention is to provide a preparation method of anorthite-quartz-glass phase complex-phase ceramic with low thermal expansion coefficient, low apparent porosity and high bending strength, wherein the introduced glass phase is uniformly distributed around the anorthite phase and the quartz phase, so that the thermal expansion coefficient of the ceramic is lower.
In order to solve the technical problems, the invention provides the following technical scheme:
a preparation method of anorthite-quartz-glass phase multiphase ceramic comprises the following steps:
(1) preparing raw materials: respectively taking desert sand, fly ash or pretreated fly ash, kaolin and cellulose as multiphase ceramic raw materials for later use;
(2) ball milling and granulating: mixing desert sand, fly ash or pretreated fly ash, kaolin and cellulose, ball-milling and granulating;
(3) molding;
(4) and (5) sintering.
In the preparation method of the anorthite-quartz-glass phase multiphase ceramic, in the step (1), the mass ratio of the desert sand, the fly ash or the pretreated fly ash, the kaolin and the cellulose is (2-8): (2-8):(0.5-2.5):(0.5-1.5).
In the preparation method of the anorthite-quartz-glass phase multiphase ceramic, in the step (2), the solvent used in ball milling is water or a glycerol-polyoxyethylene ether aqueous solution.
The preparation method of the anorthite-quartz-glass phase multiphase ceramic comprises the following steps of (2) in a glycerol-polyoxyethylene ether aqueous solution: the mass ratio of the glycerol to the polyoxyethylene ether to the water is as follows: (2-4): (1-3): 10.
in the preparation method of the anorthite-quartz-glass phase multiphase ceramic, in the step (2), the adding amount of the solvent during ball milling is 40-50% of the mass of the multiphase ceramic raw material.
In the step (2), the ball milling time is 2-3 hours, the ball milling rotating speed is 40 r/min, the granularity of the powder after ball milling is 5-10 mu m, and the granularity of granulation is 1-2 mm.
In the preparation method of the anorthite-quartz-glass phase multiphase ceramic, in the step (3), the molding pressure is 20-50 MPa.
In the preparation method of the anorthite-quartz-glass phase complex phase ceramic, in the step (4), the sintering temperature is 1100-.
The preparation method of the anorthite-quartz-glass phase multiphase ceramic comprises the following steps of: adding the mixture of the fly ash and lithium carbonate into a polyethylene glycol-silane coupling agent solution according to the solid-liquid mass ratio of 1 (0.4-0.5), carrying out ball milling mixing for 2-3 hours at the ball milling rotation speed of 40 r/min, wherein the granularity of powder after ball milling is 5-10 mu m, filtering after the ball milling is finished, and drying at 60-80 ℃ to obtain the pretreated fly ash; in a polyethylene glycol-silane coupling agent solution: the mass fraction of the polyethylene glycol is 4-10%, and the mass fraction of the silane coupling agent is 0.5-2.5%; in the mixture of fly ash and lithium carbonate: the mass fraction of the lithium carbonate is 10-15%.
In the preparation method of the anorthite-quartz-glass phase multiphase ceramic, the silane coupling agent is 3-methacryloxypropyltrimethoxysilane.
The technical scheme of the invention achieves the following beneficial technical effects:
the complex phase ceramic material of anorthite-quartz-glass phase prepared by the invention has the apparent porosity of 0.5-7%, the bending strength of 70-130MPa and the thermal expansion coefficient of (3.0-7.4) x 10-6The temperature per DEG C can be used for manufacturing conveying pipelines, bin linings, heat insulation boards, kiln materials and the like in the industries of machinery, chemical engineering, metallurgy, environmental protection and the like, and can also be used for road paving in cities and towns and villages, building decoration and the like.
The more silicon oxide components in the aeolian sand participate in the phase change of anorthite, and the rest silicon oxide forms a cristobalite phase or forms a liquid phase with other components in the mixed raw materials, and the liquid phase is converted into a glass phase after being cooled.
The glass phase can accelerate ion diffusion to promote sintering phase change, reduce sintering temperature and heat preservation time, densify the blank so as to improve strength, and reduce the problem of blank cracking caused by anisotropic expansion and contraction of quartz phase and anorthite crystal in the sintering process. The heterogeneous ceramic is introduced with ions with large radius such as K+、Na+、Ca2+The glass phase has a lower thermal expansion coefficient, and the glass phase and the quartz phase are distributed around the anorthite phase and the quartz phase and play a role in reducing the thermal expansion coefficient of the ceramic.
The multiphase ceramic material and the preparation method thereof have the advantages that the defects of single-phase anorthite ceramic and single-phase quartz ceramic in sintering property, physical property and mechanical property, such as high sintering temperature, low density, green body sintering cracking, high thermal expansion coefficient, low strength and the like, are avoided, and the multiphase ceramic material has the comprehensive advantages of rich raw materials, low cost, simple and convenient process, environmental protection, green manufacture and good performance.
Drawings
FIG. 1 is a phase composition diagram of a complex phase ceramic obtained by a complex phase ceramic synthesis method of anorthite-quartz-glass phase according to the present invention, (a) is a phase composition diagram of example 1, (b) is a phase composition diagram of example 3, (c) is a phase composition diagram of example 5, and (d) is a phase composition diagram of example 7;
FIG. 2 is a graph showing the content changes of anorthite phase, quartz phase and glass phase at different fly ash contents in the complex phase ceramic obtained by the complex phase ceramic synthesis method of anorthite-quartz-glass phase in example 1 to example 7;
FIG. 3 is a graph showing the relationship between the content of various fly ashes and the expansion coefficient in the complex phase ceramic obtained by the complex phase ceramic synthesis method of example 1-example 7 anorthite-quartz-glass phase;
FIG. 4 is a graph showing the relationship between the content of various fly ashes and the bending strength in the complex phase ceramic obtained by the complex phase ceramic synthesis method of example 1-example 7 anorthite-quartz-glass phase;
FIG. 5 is a graph showing the relationship between the content of fly ash and the apparent porosity in the complex phase ceramics obtained by the complex phase ceramic synthesis method of anorthite-quartz-glass phase in example 1, example 3, example 5 and example 7.
Detailed Description
Example one
The mass ratio of the desert sand to the fly ash to the kaolin to the cellulose is 8: 2: 0.5:1, mixing the desert sand, the fly ash, the kaolin and the cellulose, and then ball-milling in water, wherein the using amount of the water is 50 percent of the total mass of the raw materials; the ball milling time is 3 hours, the rotating speed of the ball milling is 40 r/min,the powder after ball milling has a particle size of 5-10 μm, a particle size of 1-2mm, a molding pressure of 20MPa, a sintering time of 1100 deg.C for 2 hr, a ceramic apparent porosity of 6.8%, a bending strength of 70MPa, a thermal expansion coefficient of 7.2 × 10-6/℃。
Example two
The mass ratio of the desert sand to the fly ash to the kaolin to the cellulose is 7: 3: 1:1.5, mixing the desert sand, the fly ash, the kaolin and the cellulose, and then ball-milling in water, wherein the using amount of the water is 50% of the total mass of the raw materials; ball milling time is 2 hours, ball milling rotation speed is 40 r/min, powder particle size after ball milling is 5-10 μm, particle size of granulation is 1-2mm, molding is carried out under 30MPa pressure, sintering is carried out for 4 hours at 1150 ℃, ceramic apparent porosity is 4.9%, bending strength is 97MPa, thermal expansion coefficient is 6.6 multiplied by 10-6/℃。
EXAMPLE III
The mass ratio of the desert sand to the fly ash to the kaolin to the cellulose is 6: 4: 2:1, mixing the desert sand, the fly ash, the kaolin and the cellulose, and then ball-milling in water, wherein the using amount of the water is 50% of the total mass of the raw materials; ball milling time of 2.5 hr, ball milling rotation speed of 40 rpm, powder particle size of 5-10 μm after ball milling, particle size of 1-2mm, molding under 50MPa pressure, sintering at 1250 deg.C for 3 hr, ceramic apparent porosity of 0.5%, bending strength of 110MPa, thermal expansion coefficient of 6.2 × 10-6/℃。
Example four
The mass ratio of the desert sand to the fly ash to the kaolin to the cellulose is 5: 1.5:1, mixing the desert sand, the fly ash, the kaolin and the cellulose, and then ball-milling in water, wherein the using amount of the water is 50 percent of the total mass of the raw materials; ball milling time is 2 hr, ball milling rotation speed is 40 r/min, powder particle size after ball milling is 5-10 μm, particle size of the granules is 1-2mm, molding is carried out under 30MPa pressure, sintering is carried out at 1125 deg.C for 3 hr, ceramic apparent porosity is 2.9%, bending strength is 97MPa, thermal expansion coefficient is 5.5 × 10-6/℃。
EXAMPLE five
The mass ratio of the desert sand to the fly ash to the kaolin to the cellulose is 4: 6: 1.5:0.5, mixing desert sand, fly ash, kaolin and fiberMixing the vitamins, and then ball-milling the mixture in water, wherein the using amount of the water is 50 percent of the total mass of the raw materials; ball milling time is 3 hours, ball milling rotation speed is 40 r/min, powder particle size after ball milling is 5-10 μm, particle size of granulation is 1-2mm, forming is carried out under 40MPa pressure, sintering is carried out for 2 hours at 1200 ℃, ceramic apparent porosity is 3.4%, bending strength is 95MPa, thermal expansion coefficient is 5.3 multiplied by 10-6/℃。
EXAMPLE six
The mass ratio of the desert sand to the fly ash to the kaolin to the cellulose is 3: 7: 2.5:1.5, mixing the desert sand, the fly ash, the kaolin and the cellulose, and then ball-milling in water, wherein the using amount of the water is 50 percent of the total mass of the raw materials; ball milling time is 2.5 hours, ball milling rotation speed is 40 r/min, powder particle size after ball milling is 5-10 μm, particle size of granulation is 1-2mm, molding is carried out under 30MPa pressure, sintering is carried out for 2.5 hours at 1250 ℃, ceramic apparent porosity is 2.6%, bending strength is 93MPa, thermal expansion coefficient is 4.6 multiplied by 10-6/℃。
EXAMPLE seven
The mass ratio of the desert sand to the fly ash to the kaolin to the cellulose is 2: 8: 0.5:1.5, mixing the desert sand, the fly ash, the kaolin and the cellulose, and then ball-milling in water, wherein the using amount of the water is 50 percent of the total mass of the raw materials; ball milling time is 3 hours, ball milling rotation speed is 40 r/min, powder particle size after ball milling is 5-10 μm, particle size of granulation is 1-2mm, molding is carried out under 20MPa pressure, sintering is carried out for 3 hours at 1300 ℃, ceramic apparent porosity is 6.8%, bending strength is 72MPa, thermal expansion coefficient is 3.7 x 10-6/℃。
Example eight
The mass ratio of the desert sand to the pretreated fly ash to the kaolin to the cellulose is 6: 4: 2:1, the preparation method of the pretreated fly ash comprises the following steps: adding the mixture of the fly ash and lithium carbonate into a polyethylene glycol-silane coupling agent solution according to the solid-liquid mass ratio of 1:0.4, carrying out ball milling mixing for 2 hours at the ball milling rotation speed of 40 revolutions per minute, wherein the particle size of powder after ball milling is 5-10 mu m, filtering after ball milling, and drying at 60-80 ℃ to obtain pretreated fly ash; in a polyethylene glycol-silane coupling agent solution: the mass fraction of the polyethylene glycol is 5 percent, and the mass fraction of the silane coupling agent is 2 percent; in this example, the silane coupling agent is 3-methacryloxypropyltrimethoxysilane; in the mixture of fly ash and lithium carbonate: the mass fraction of the lithium carbonate is 15%.
Mixing desert sand, pretreated fly ash, kaolin and cellulose, and performing ball milling in a glycerol-polyoxyethylene ether aqueous solution, wherein in the glycerol-polyoxyethylene ether aqueous solution: the mass ratio of the glycerol to the polyoxyethylene ether to the water is as follows: 2: 3: 10. ball milling time is 2 hr, ball milling rotation speed is 40 r/min, powder particle size after ball milling is 5-10 μm, particle size after granulation is 1-2mm, molding is carried out under 50MPa pressure, sintering is carried out at 1250 deg.C for 3 hr, ceramic apparent porosity is 0.8%, bending strength is 130MPa, thermal expansion coefficient is 3.0 × 10-6/℃。
Results and discussion
1. Synthetic principle of anorthite-quartz-glass phase complex phase ceramic
The aeolian sand contains more than 70-80 wt% of silicon oxide and less than 20-30 wt% of alumina, titanium oxide, iron oxide, magnesium oxide, calcium oxide, sodium oxide and other components.
The fly ash contains mullite (3 Al)2O3·2SiO2) Calcium oxide, quartz and glass, etc.
The two raw materials are fully ball-milled, mixed, pressed and sintered at high temperature, wherein chemical reaction takes place between mullite, quartz, calcium oxide and the like, and Ca is generated2+、Al3+、Si4+The ions are recombined by diffusion to form anorthite crystal (CaO. Al)2O3·2SiO2) The formation temperature is higher than 1100 ℃, and the main chemical reaction equation is 3Al2O3·2SiO2+SiO2+CaO→CaO·Al2O3·2SiO2
Because of CaO and Al in anorthite2O3And SiO2Is 20.1: 36.7: 43.2, ions other than the above ratio may form other impurity phases or glass phases in addition to a small amount of solid solution to the phase. Therefore, more silicon oxide in aeolian sand not only participates in the phase change of anorthiteIn addition, the remaining silica forms a cristobalite phase or forms a liquid phase with other components in the mixed raw materials, and is converted into a glass phase after cooling. The liquid phases can accelerate ion diffusion, promote sintering phase change, reduce sintering temperature and heat preservation time, densify a blank so as to improve strength, and relieve the problem of blank cracking in the sintering process caused by anisotropic expansion and contraction of quartz and anorthite crystals.
On the other hand, the thermal expansion coefficients of the quartz phase and the anorthite phase are about 11X 10, respectively-6/° C and 4.82 × 10-6/° c; compared with anorthite and quartz crystal, the complex phase ceramic is introduced with ions with large radius such as K+、Na+、Ca2+The glass phase has a lower thermal expansion coefficient, and the glass phase and the quartz phase are distributed around the anorthite phase and the quartz phase and play a role in reducing the thermal expansion coefficient of the ceramic.
2. Complex phase ceramic crystal phase change of anorthite-quartz-glass phase
Aeolian sand and fly ash are used as main raw materials, and a small amount of kaolin and cellulose are added to improve the strength of a blank and promote sintering. The raw materials are mixed according to a certain proportion, ball-milled, granulated, molded under the pressure of 20-50MPa, sintered at the temperature of 1100-1300 ℃ and kept warm for 2-4h, and the obtained ceramic mainly comprises quartz, anorthite and glass phase. By adjusting the proportion of the aeolian sand and the fly ash, a series of ceramics with different feldspar phase and quartz phase proportions can be obtained.
As shown in FIG. 1, phase composition diagrams of the ceramics of example 1(a), example 3(b), example 5(c) and example 7(d) are shown, respectively. Wherein the fly ash content in example 1 is 20%, the fly ash content in example 3 is 40%, the fly ash content in example 5 is 60%, and the fly ash content in example 7 is 80%. (in the embodiment, the percentage of the fly ash is only counted as the total amount of the desert sand and the fly ash, and the mass of kaolin and cellulose are not included.)
As shown in fig. 2, the feldspar phase and quartz phase contents in examples 1 to 7 varied with the addition amount of the fly ash, and it was found that the quartz phase decreased and the anorthite phase increased with the increase in the fly ash content in the raw material when the raw material was sintered at 1200 ℃. When the content of the fly ash is 30-40%, the contents of quartz and anorthite are close.
The thermal expansion coefficients of the quartz phase and the anorthite phase are about 11X 10-6/° C and 4.82 × 10-6/° c; compared with anorthite and quartz crystal, the complex phase ceramic is introduced with large radius ion such as K+、Na+、Ca2+The glass phase has a lower thermal expansion coefficient, and the glass phase and the quartz phase are distributed around the anorthite phase and the quartz phase and play a role in reducing the thermal expansion coefficient of the ceramic.
Meanwhile, the glass phase can accelerate ion diffusion to promote sintering phase change, reduce sintering temperature and heat preservation time, and can also densify the blank, thereby improving strength, and in addition, the problem of blank cracking in the sintering process caused by anisotropic expansion and shrinkage of quartz and anorthite crystals can be relieved.
3. Relation between coal ash content and anorthite-quartz-glass phase complex phase ceramic performance
The performance of the ceramic is related to various factors such as additives, sintering temperature, holding time, forming pressure, compactness and the like besides the properties and relative proportions of the feldspar phase and the quartz phase.
As shown in fig. 3, the coefficient of thermal expansion of the ceramic decreases with increasing fly ash content in examples 1-7, primarily due to the reduced quartz phase content and the presence of a low coefficient of thermal expansion glass.
As shown in fig. 4, the bending strength of the ceramics in examples 1 to 7 tends to increase first and then decrease with the increase of the content of the fly ash, on one hand, the strength of the quartz phase is higher than that of the feldspar phase, and on the other hand, the density of the ceramic body can be improved by increasing the content of the fly ash under the conditions of lower content and moderate sintering temperature; and the strength reaches the highest value when the addition proportion of the fly ash is 30-40%. It can be seen that the quartz phase, sintering temperature and compactness of the composite ceramic cause the strength of the ceramic to increase and then decrease with the increase of the content of the fly ash.
As shown in fig. 5, the apparent porosity of examples 1, 3, 5, and 7 tended to decrease and then increase with increasing fly ash content, i.e., the apparent porosity decreased and the density of the ceramic body was high. When the addition proportion of the fly ash is 30-40%, the apparent porosity reaches the lowest value, and the density is the highest. The density is reduced by continuously increasing the proportion of the fly ash, and the sintering temperature is further increased, so that the green body is melted and the density is reduced.
4. The addition of the fly ash has great influence on the performance of the complex phase ceramic. Therefore, the applicant further studies the fly ash in the eighth embodiment, and pretreats the fly ash formed after the pulverized coal of the boiler of the thermal power plant is combusted to obtain the pretreated fly ash, so as to further optimize the performance of the complex phase ceramic. Through mixing the fly ash and the lithium carbonate and then carrying out ball milling in a polyethylene glycol-silane coupling agent solution, on one hand, the fly ash can be modified, which is beneficial to further improving the strength of the complex phase ceramic, and more importantly: the lithium carbonate is decomposed into lithium oxide and carbon dioxide in the sintering process, the lithium oxide can play a role in improving the content of a glass phase and improving the structure of the glass phase, so that the green body is densified, the strength of the complex-phase ceramic is improved, the generated carbon dioxide and the lithium oxide act together, the glass phase is favorably and uniformly dispersed around the quartz phase and the anorthite phase, and the thermal expansion coefficient of the ceramic is further reduced. The raw materials of the multiphase ceramic can be better dispersed, the anorthite-quartz-glass phase formed after sintering is uniformly distributed in the ceramic, the anisotropy difference of compressive strength and thermal expansion coefficient is smaller, and the multiphase ceramic can be made into various shapes and specifications according to requirements when being used for manufacturing conveying pipelines, bin linings, heat insulation boards and kiln materials in the industries of machinery, chemical engineering, metallurgy, environmental protection and the like, and being used for road pavement in cities, towns and villages and building decoration.
The ceramics obtained in the present invention mainly consist of anorthite, quartz and vitreous phase. When the content of the fly ash is less than 20%, the main phase of the ceramic is a quartz phase, and the quartz phase is reduced and the anorthite phase is increased along with the increase of the content of the fly ash in the ingredients. When the content of the fly ash is more than 50-60%, the main phase of the ceramic is anorthite, and the quartz phase in the ceramic is reduced and the anorthite phase is increased along with the continuous increase of the content of the fly ash in the ingredients. When the content of the fly ash is more than 80 percent, the quartz phase in the ceramic basically disappears, and the anorthite ceramic is obtained.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications are possible which remain within the scope of the appended claims.

Claims (6)

1. The preparation method of the anorthite-quartz-glass phase complex phase ceramic is characterized by comprising the following steps of:
(1) preparing raw materials: respectively taking desert sand, fly ash or pretreated fly ash, kaolin and cellulose as multiphase ceramic raw materials for later use; the mass ratio of the desert sand to the fly ash or the pretreated fly ash to the kaolin to the cellulose is (2-8): (2-8): (0.5-2.5): 0.5-1.5);
(2) ball milling and granulating: mixing desert sand, fly ash or pretreated fly ash, kaolin and cellulose, ball-milling and granulating; the solvent used in ball milling is water or a glycerol-polyoxyethylene ether aqueous solution;
the preparation method of the pretreated fly ash comprises the following steps: adding the mixture of the fly ash and lithium carbonate into a polyethylene glycol-silane coupling agent solution according to the solid-liquid mass ratio of 1 (0.4-0.5), carrying out ball milling mixing for 2-3 hours at the ball milling rotation speed of 40 r/min, wherein the granularity of powder after ball milling is 5-10 mu m, filtering after the ball milling is finished, and drying at 60-80 ℃ to obtain the pretreated fly ash; in a polyethylene glycol-silane coupling agent solution: the mass fraction of the polyethylene glycol is 4-10%, and the mass fraction of the silane coupling agent is 0.5-2.5%; in the mixture of fly ash and lithium carbonate: the mass fraction of the lithium carbonate is 10-15%;
the silane coupling agent is 3-methacryloxypropyl trimethoxy silane
(3) Molding;
(4) and (5) sintering.
2. The method for preparing anorthite-quartz-glass phase complex phase ceramic as claimed in claim 1, wherein in the step (2), in the glycerol-polyoxyethylene ether aqueous solution: the mass ratio of the glycerol to the polyoxyethylene ether to the water is as follows: (2-4): (1-3): 10.
3. the method for preparing anorthite-quartz-glass phase complex phase ceramic as claimed in claim 1, wherein in the step (2), the amount of the solvent added during the ball milling is 40-50% of the mass of the complex phase ceramic raw material.
4. The method for preparing anorthite-quartz-glass phase complex phase ceramic as claimed in claim 1, wherein in the step (2), the ball milling time is 2-3 hours, the rotation speed of the ball milling is 40 rpm, the particle size of the powder after the ball milling is 5-10 μm, and the particle size of the granules is 1-2 mm.
5. The method for preparing anorthite-quartz-glass phase complex phase ceramic as claimed in claim 1, wherein the molding pressure is 20 to 50MPa in the step (3).
6. The method for preparing anorthite-quartz-glass phase composite ceramic as claimed in claim 1, wherein the sintering temperature is 1100-.
CN202010114339.XA 2020-02-25 2020-02-25 Preparation method of anorthite-quartz-glass phase multiphase ceramic Active CN111233334B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010114339.XA CN111233334B (en) 2020-02-25 2020-02-25 Preparation method of anorthite-quartz-glass phase multiphase ceramic

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010114339.XA CN111233334B (en) 2020-02-25 2020-02-25 Preparation method of anorthite-quartz-glass phase multiphase ceramic

Publications (2)

Publication Number Publication Date
CN111233334A CN111233334A (en) 2020-06-05
CN111233334B true CN111233334B (en) 2022-05-17

Family

ID=70875099

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010114339.XA Active CN111233334B (en) 2020-02-25 2020-02-25 Preparation method of anorthite-quartz-glass phase multiphase ceramic

Country Status (1)

Country Link
CN (1) CN111233334B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112624619A (en) * 2021-01-05 2021-04-09 内蒙古工业大学 Quartz nanocrystalline microcrystalline glass synthesized by desert aeolian sand and synthetic method thereof
CN112919892B (en) * 2021-02-05 2023-01-24 江西陶瓷工艺美术职业技术学院 Inorganic ceramic membrane support material and preparation method thereof
CN113213765A (en) * 2021-06-15 2021-08-06 内蒙古工业大学 Method for synthesizing cordierite glass ceramics by utilizing desert aeolian sand
CN114262218B (en) * 2021-12-01 2022-12-02 景德镇陶瓷大学 High-performance ceramic rock plate and preparation method thereof

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1149585A (en) * 1997-08-01 1999-02-23 Oda Kensetsu Kk Porous lightweight ceramic product and its production
CN102617154A (en) * 2012-04-01 2012-08-01 景德镇陶瓷学院 Method for preparing environment-friendly building ceramic tile by using high lean material
CN104140255A (en) * 2014-07-30 2014-11-12 华南理工大学 Method for manufacturing high-tenacity ceramics through tricalcium phosphate
CN104496535A (en) * 2015-01-04 2015-04-08 中南大学 Foamed ceramic mainly prepared from silica sand tailing and fly ash and preparation method thereof
CN105272338A (en) * 2015-10-12 2016-01-27 鄂尔多斯市紫荆创新研究院 Method for preparing high-strength foaming ceramic material by utilizing fly ash and desert sand
CN108467258A (en) * 2018-05-25 2018-08-31 北方民族大学 A kind of perforation stomata porous ceramics standby using coal ash for manufacturing and preparation method thereof

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH1149585A (en) * 1997-08-01 1999-02-23 Oda Kensetsu Kk Porous lightweight ceramic product and its production
CN102617154A (en) * 2012-04-01 2012-08-01 景德镇陶瓷学院 Method for preparing environment-friendly building ceramic tile by using high lean material
CN104140255A (en) * 2014-07-30 2014-11-12 华南理工大学 Method for manufacturing high-tenacity ceramics through tricalcium phosphate
CN104496535A (en) * 2015-01-04 2015-04-08 中南大学 Foamed ceramic mainly prepared from silica sand tailing and fly ash and preparation method thereof
CN105272338A (en) * 2015-10-12 2016-01-27 鄂尔多斯市紫荆创新研究院 Method for preparing high-strength foaming ceramic material by utilizing fly ash and desert sand
CN108467258A (en) * 2018-05-25 2018-08-31 北方民族大学 A kind of perforation stomata porous ceramics standby using coal ash for manufacturing and preparation method thereof

Also Published As

Publication number Publication date
CN111233334A (en) 2020-06-05

Similar Documents

Publication Publication Date Title
CN111233334B (en) Preparation method of anorthite-quartz-glass phase multiphase ceramic
CN102432312B (en) Micro-porous mullite-silicon carbide multiphase fire resistant material and preparation method thereof
CN108516849B (en) Zirconium mullite brick for cement kiln and preparation method thereof
CN106145976B (en) Andalusite-mullite-silicon carbide brick for cement kiln and preparation method thereof
CN102701764A (en) Sintered alumina-silica refractory material and preparation method thereof
CN100393656C (en) High-intensity corrosion-proof chimney lining brick made by mullite and method for manufacturing the same
CN102391007A (en) Silicon carbide brick for garbage incinerator and preparation method thereof
CN103755332B (en) Desert wind sand is utilized to prepare the method for cordierite ceramic
CN103755363A (en) Lightweight siliceous mullite composite brick and preparation method thereof
CN103964866A (en) Method for preparing lightweight mullite refractory by high-alumina fly ash
CN106588059A (en) Prefabricated member for lime rotary kiln and preparation method of prefabricated member
CN101948285A (en) Calcium silicate material prepared from waste ceramic powder and preparation method thereof
CN110963807A (en) Energy-saving mullite refractory brick for cement kiln transition zone and preparation method thereof
US20080261799A1 (en) Refractory shaped body with increased alkali resistance
JP2012031006A (en) Fire-resistant heat-insulating brick, and method of manufacturing the same
CA1098292A (en) Method of making an insulating refractory
CN109020397A (en) A kind of phase-change energy-storage mortar and preparation method thereof
Zhu et al. Efflorescence of microwave-heated alkali-activated cement synthesized with ultrafine coal combustion ashes
JP2756934B2 (en) Sinter from coal ash as raw material and method for producing the same
JPS629552B2 (en)
CN100383084C (en) Method for producing forsterite refractory using iron tailings
CN102285808A (en) Alkaliproof structure and thermal insulation integrated composite brick and preparation method thereof
CN101830714A (en) Alumina-silicon nitride iron compound abrasive brick for large-size cement kiln and manufacture method thereof
CN101768004B (en) Low-pore in situ oriental topaz brick and preparation method thereof
JP4377256B2 (en) Manufacturing method of artificial lightweight aggregate

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant