CN104261849B - A kind of containing zirconium mullite-vagcor composite diphase material and preparation method thereof - Google Patents
A kind of containing zirconium mullite-vagcor composite diphase material and preparation method thereof Download PDFInfo
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- CN104261849B CN104261849B CN201410523197.7A CN201410523197A CN104261849B CN 104261849 B CN104261849 B CN 104261849B CN 201410523197 A CN201410523197 A CN 201410523197A CN 104261849 B CN104261849 B CN 104261849B
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Abstract
The present invention relates to a kind of containing zirconium mullite-vagcor composite diphase material and preparation method thereof. Its technical scheme is: taking discarded molding sand, the alumina of 15 ~ 40wt% and the clay of 5 ~ 10wt% of 50 ~ 80wt% as raw material, mix moulding; Then under 1450 ~ 1600 DEG C of conditions, burn till, be incubated 3 ~ 5 hours, naturally cooling, obtain containing zirconium mullite-vagcor composite diphase material. The Al of described discarded molding sand2O3Content >=35wt%, ZrO2Content >=5.0wt%, Fe2O3Content≤1.5wt%; Particle diameter≤the 0.15mm of discarded molding sand. The Al of described alumina2O3Content >=75wt%, TiO2Content≤4.5wt%; Particle diameter≤0.089 of alumina? mm. Burning mistake >=the 10wt% of clay at 1000 DEG C; The Al of clay2O3Content≤35wt%. The present invention have production cost low, pollute feature little and that economize on resources; Prepared has lower thermal coefficient of expansion and good thermal shock resistance containing zirconium mullite-vagcor composite diphase material, and the scope of application is wide.<b><u/></b>
Description
Technical field
The invention belongs to mullite-vagcor composite diphase material technical field. Be specifically related to a kind of containing zirconium mullite-vagcor composite diphase material and preparation method thereof.
Background technology
According to incompletely statistics, current hot investment casting enterprise of China sum reaches family more than 1300, and more than 50 ten thousand tons of yearly productive capacities are to be only second to second largest hot investment casting base, Japanese Asia, will produce every year approximately 65 ~ 750,000 tons of precision casting waste sands. But at present cast waste sand comprehensive utilizating research and industrialization work focuses mostly on aspect waterglass antiquated sand, and comprehensive utilizating research and industrialization work to precision casting waste sand is relatively less.
At Al2O3--SiO2The low aluminium zones of based material, the main phase composition being present in refractory material is mullite, cristobalite and glassy phase, due to the existence of cristobalite, is that the thermal shock resistance of this based article (as clay brick) is poor. If cristobalite is fused in glassy phase, not only can eliminate changing mutually of cristobalite and the thermal shock resistance that causes is poor, and can obtain SiO2The glassy phase that content is high. The thermal coefficient of expansion of this vagcor is lower, is at high temperature converted into high SiO2Its viscosity of the liquid phase of content is large. Therefore the refractory material that, contains vagcor has higher refractoriness under load. And ZrO2As a kind of acid refractory, under oxidizing atmosphere use very stable, under different heating conditions, monocline crystalline phase is stabilized in below 1170 DEG C, tetragonal phase is stabilized between 1170 ~ 2370 DEG C, and a cube crystalline phase is stabilized between 2370 ~ 2680 DEG C (fusing points), utilizes ZrO2Transformation toughening can improve greatly the mechanical behavior under high temperature of material.
" a kind of mullite lightweight thermal insulation brick based on discarded molding sand and preparation method thereof " (ZL201210105340.1) patented technology prepares mullite lightweight thermal insulation brick taking the discarded molding sand of hot investment casting as primary raw material, but being of limited application of lightweight thermal insulation brick, thereby affect the recovery utilization rate of discarded molding sand. " prepare the method for mullite-silica-rich glass material made with kyanite micro mist " (CN1184789A) patented technology and " preparing the method for mullite-silica-rich glass material made with andalusite micropowder " (CN1184788A) patented technology prepare mullite-silica-rich glass material made taking micron-sized Concentrated kyanite ore powder and micron-sized andalusite fine ore as raw material respectively, the major defect of these two patented technologies is, cost of material is high, is unfavorable for realizing large-scale industrial production. " a kind of mullite-vagcor composite diphase material and preparation method thereof " (CN101423408A) patented technology prepares mullite-vagcor composite diphase material taking discarded object electro-corundum dust-removing powder as primary raw material, its major defect is K in raw material2O too high levels, has seriously reduced the temperature that liquid phase forms, and affects the high-temperature behavior of goods.
Summary of the invention
The present invention is intended to overcome the defect of prior art, and object is to provide the preparation method containing zirconium mullite-vagcor composite diphase material that a kind of production cost is low, can reduce pollution and economize on resources; Prepared have lower thermal coefficient of expansion and good thermal shock resistance containing zirconium mullite-vagcor composite diphase material, and the scope of application is wide.
For achieving the above object, the technical solution adopted in the present invention is: first discarded molding sand, the alumina of 15 ~ 40wt% and the clay of 5 ~ 10wt% taking 50 ~ 80wt%, as raw material, mix moulding; Then under 1450 ~ 1600 DEG C of conditions, burn till, be incubated 3 ~ 5 hours, naturally cooling, make containing zirconium mullite-vagcor composite diphase material.
The Al of described alumina2O3Content >=75wt%, TiO2Content≤4.5wt%; Particle diameter≤the 0.089mm of alumina.
The Al of described clay2O3Content≤35wt%; Burning mistake >=the 10wt% of clay at 1000 DEG C.
The Al of described discarded molding sand2O3Content >=35wt%, ZrO2Content >=5.0wt%, Fe2O3Content≤1.5wt%; Particle diameter≤the 0.15mm of discarded molding sand.
Owing to adopting technique scheme, the present invention, to discard molding sand as primary raw material, has realized the recycling of discarded molding sand, not only economizes on resources, reduces production costs, and reduced the pollution of solid waste; Impurity in raw material of the present invention can play and reduce zircon decomposition temperature and promote unnecessary SiO2-fuse into the effect in glassy phase, also can avoid goods ZrO in the process of cooling2With SiO2Again in conjunction with generating zircon. The present invention utilizes generated in-situ ZrO2-Transformation toughening effect improved the mechanical behavior under high temperature of material, improved the result of use of goods. Prepared zirconium mullite-vagcor composite diphase material that contains, containing cristobalite and corundum, has lower thermal coefficient of expansion and good thermal shock resistance; What make is applicable to the fields such as investment casting shell material and refractory material containing zirconium mullite-vagcor composite diphase material.
The prepared main thing containing zirconium mullite-vagcor composite diphase material of the present invention is mullite, glassy phase and baddeleyite mutually, and prepared contains zirconium mullite-vagcor composite diphase material after testing: bulk density is 1.81 ~ 2.42g/cm3, apparent porosity is 16 ~ 23%, thermal coefficient of expansion (RT ~ 1000 DEG C) is 3.10 × 10-6~4.07×10-6/℃。
Therefore, the present invention has the advantages that production cost is low, can reduce pollution and economize on resources; Prepared have lower thermal coefficient of expansion and good thermal shock resistance containing zirconium mullite-vagcor composite diphase material, and the scope of application is wide.
Brief description of the drawings
Fig. 1 is a kind of X ray diffracting spectrum containing zirconium mullite-vagcor composite diphase material prepared by the present invention.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention will be further described, not limiting the scope of the invention.
Embodiment 1
A kind of containing zirconium mullite-vagcor composite diphase material and preparation method thereof. First discarded molding sand, the alumina of 37 ~ 40wt% and the clay of 8 ~ 10wt% taking 50 ~ 55wt%, as raw material, mix, and moulding is then burnt till under 1450 ~ 1500 DEG C of conditions, is incubated 3 ~ 5 hours, naturally cooling, makes containing zirconium mullite-vagcor composite diphase material.
What the present embodiment was prepared contains zirconium mullite-vagcor composite diphase material through X-ray diffraction analysis, and main thing is mullite, glassy phase and baddeleyite mutually. After testing: bulk density is 1.81 ~ 1.92g/cm3, apparent porosity is 21 ~ 23%, thermal coefficient of expansion (RT ~ 1000 DEG C) is 3.30 × 10-6~3.71×10-6/℃。
Embodiment 2
A kind of containing zirconium mullite-vagcor composite diphase material and preparation method thereof. First discarded molding sand, the alumina of 34 ~ 37wt% and the clay of 6 ~ 8wt% taking 55 ~ 60wt%, as raw material, mix moulding; Then under 1500 ~ 1550 DEG C of conditions, burn till, be incubated 3 ~ 5 hours, naturally cooling, make containing zirconium mullite-vagcor composite diphase material.
What the present embodiment was prepared contains zirconium mullite-vagcor composite diphase material through X-ray diffraction analysis, and main thing is mullite, glassy phase and baddeleyite mutually. After testing: bulk density is 2.2 ~ 2.32g/cm3, apparent porosity is 18 ~ 20%, thermal coefficient of expansion (RT ~ 1000 DEG C) is 3.10 × 10-6~3.51×10-6/℃。
Embodiment 3
A kind of containing zirconium mullite-vagcor composite diphase material and preparation method thereof. First discarded molding sand, the alumina of 28 ~ 31wt% and the clay of 7 ~ 9wt% taking 60 ~ 65wt%, as raw material, mix moulding; Then under 1500 ~ 1550 DEG C of conditions, burn till, be incubated 3 ~ 5 hours, naturally cooling, make containing zirconium mullite-vagcor composite diphase material.
What the present embodiment was prepared contains zirconium mullite-vagcor composite diphase material through X-ray diffraction analysis, and main thing is mullite, glassy phase and baddeleyite mutually. After testing: bulk density is 1.93 ~ 2.11g/cm3, apparent porosity is 19 ~ 21%, thermal coefficient of expansion (RT ~ 1000 DEG C) is 3.30 × 10-6~3.68×10-6/℃。
Embodiment 4
A kind of containing zirconium mullite-vagcor composite diphase material and preparation method thereof. First discarded molding sand, the alumina of 25 ~ 28wt% and the clay of 5 ~ 7wt% taking 65 ~ 70wt%, as raw material, mix moulding; Then under 1550 ~ 1600 DEG C of conditions, burn till, be incubated 3 ~ 5 hours, naturally cooling, make containing zirconium mullite-vagcor composite diphase material.
What the present embodiment was prepared contains zirconium mullite-vagcor composite diphase material through X-ray diffraction analysis, and main thing is mullite, glassy phase and baddeleyite mutually. After testing: bulk density is 2.15 ~ 2.22g/cm3, apparent porosity is 18 ~ 20%, thermal coefficient of expansion (RT ~ 1000 DEG C) is 3.29 × 10-6~3.61×10-6/℃。
Embodiment 5
A kind of containing zirconium mullite-vagcor composite diphase material and preparation method thereof. First discarded molding sand, the alumina of 20 ~ 23wt% and the clay of 5 ~ 7wt% taking 70 ~ 75wt%, as raw material, mix moulding; Then under 1550 ~ 1600 DEG C of conditions, burn till, be incubated 3 ~ 5 hours, naturally cooling, make containing zirconium mullite-vagcor composite diphase material.
What the present embodiment was prepared contains zirconium mullite-vagcor composite diphase material through X-ray diffraction analysis, and main thing is mullite, glassy phase and baddeleyite mutually. After testing: bulk density is 2.19 ~ 2.31g/cm3, apparent porosity is 18 ~ 20%, thermal coefficient of expansion (RT ~ 1000 DEG C) is 3.70 × 10-6~4.07×10-6/℃。
Embodiment 6
A kind of containing zirconium mullite-vagcor composite diphase material and preparation method thereof. First discarded molding sand, the alumina of 15 ~ 19wt% and the clay of 5 ~ 7wt% taking 75 ~ 80wt%, as raw material, mix moulding; Then under 1550 ~ 1600 DEG C of conditions, burn till, be incubated 3 ~ 5 hours, naturally cooling, make containing zirconium mullite-vagcor composite diphase material.
What the present embodiment was prepared contains zirconium mullite-vagcor composite diphase material through X-ray diffraction analysis, and main thing is mullite, glassy phase and baddeleyite mutually. After testing: bulk density is 2.25 ~ 2.33g/cm3, apparent porosity is 19 ~ 21%, thermal coefficient of expansion (RT ~ 1000 DEG C) is 3.29 × 10-6~3.89×10-6/℃。
Embodiment 7
A kind of containing zirconium mullite-vagcor composite diphase material and preparation method thereof. First discarded molding sand, the alumina of 18 ~ 21wt% and the clay of 7 ~ 9wt% taking 70 ~ 75wt%, as raw material, mix moulding; Then under 1450 ~ 1500 DEG C of conditions, burn till, be incubated 3 ~ 5 hours, naturally cooling, make containing zirconium mullite-vagcor composite diphase material.
What the present embodiment was prepared contains zirconium mullite-vagcor composite diphase material through X-ray diffraction analysis, and main thing is mullite, glassy phase and baddeleyite mutually. After testing: bulk density is 1.9 ~ 2.08g/cm3, apparent porosity is 20 ~ 22%, thermal coefficient of expansion (RT ~ 1000 DEG C) is 3.12 × 10-6~3.67×10-6/℃。
Embodiment 8
A kind of containing zirconium mullite-vagcor composite diphase material and preparation method thereof. First discarded molding sand, the alumina of 22 ~ 25wt% and the clay of 8 ~ 10wt% taking 65 ~ 70wt%, as raw material, mix moulding; Then under 1450 ~ 1500 DEG C of conditions, burn till, be incubated 3 ~ 5 hours, naturally cooling, make containing zirconium mullite-vagcor composite diphase material.
What the present embodiment was prepared contains zirconium mullite-vagcor composite diphase material through X-ray diffraction analysis, and main thing is mullite, glassy phase and baddeleyite mutually. After testing: the bulk density of material is 1.86 ~ 2.09g/cm3, apparent porosity is 21 ~ 23%, thermal coefficient of expansion (RT ~ 1000 DEG C) is 3.15 × 10-6~3.76×10-6/℃。
Embodiment 9
A kind of containing zirconium mullite-vagcor composite diphase material and preparation method thereof. First discarded molding sand, the alumina of 31 ~ 34wt% and the clay of 4 ~ 6wt% taking 60 ~ 65wt%, as raw material, mix moulding; Then under 1550 ~ 1600 DEG C of conditions, burn till, be incubated 3 ~ 5 hours, naturally cooling, make containing zirconium mullite-vagcor composite diphase material.
What the present embodiment was prepared contains zirconium mullite-vagcor composite diphase material through X-ray diffraction analysis, and main thing is mullite, glassy phase and baddeleyite mutually. After testing: the bulk density of material is 2.31 ~ 2.42g/cm3, apparent porosity is 16 ~ 18%, thermal coefficient of expansion (RT ~ 1000 DEG C) is 3.56 × 10-6~4.02×10-6/℃。
Embodiment 10
A kind of containing zirconium mullite-vagcor composite diphase material and preparation method thereof. First discarded molding sand, the alumina of 32 ~ 35wt% and the clay of 8 ~ 10wt% taking 55 ~ 60wt%, as raw material, mix moulding; Then under 1450 ~ 1500 DEG C of conditions, burn till, be incubated 3 ~ 5 hours, naturally cooling, make containing zirconium mullite-vagcor composite diphase material.
What the present embodiment was prepared contains zirconium mullite-vagcor composite diphase material through X-ray diffraction analysis, and main thing is mullite, glassy phase and baddeleyite mutually. After testing: bulk density is 1.9 ~ 2.01g/cm3, apparent porosity is 21 ~ 23%, thermal coefficient of expansion (RT ~ 1000 DEG C) is 3.87 × 10-6~4.07×10-6/℃。
This detailed description of the invention, to discard molding sand as primary raw material, has realized the recycling of discarded molding sand, not only economizes on resources, reduces production costs, and reduced the pollution of solid waste; Impurity in raw material can play and reduce zircon decomposition temperature and promote unnecessary SiO2-fuse into the effect in glassy phase, also can avoid goods ZrO in the process of cooling2With SiO2Again in conjunction with generating zircon. This detailed description of the invention is utilized generated in-situ ZrO2-Transformation toughening effect improved the mechanical behavior under high temperature of material, improved the result of use of goods. Prepared zirconium mullite-vagcor composite diphase material that contains, containing cristobalite and corundum, has lower thermal coefficient of expansion and good thermal shock resistance, is applicable to the fields such as investment casting shell material and refractory material.
Fig. 1 is a kind of X ray diffracting spectrum containing zirconium mullite-vagcor composite diphase material prepared by the present embodiment, what this detailed description of the invention was prepared contains zirconium mullite-vagcor composite diphase material as shown in Figure 1, as can be seen from Figure 1: the prepared main thing containing zirconium mullite-vagcor composite diphase material is mullite, glassy phase and baddeleyite mutually. Prepared contains zirconium mullite-vagcor composite diphase material material after testing: bulk density is 1.81 ~ 2.42g/cm3, apparent porosity is 16 ~ 23%, thermal coefficient of expansion (RT ~ 1000 DEG C) is 3.10 × 10-6~4.07×10-6/℃。
Therefore, this detailed description of the invention has the advantages that production cost is low, can reduce pollution and economize on resources; Prepared have lower thermal coefficient of expansion and good thermal shock resistance containing zirconium mullite-vagcor composite diphase material, and the scope of application is wide.
Claims (2)
1. containing a preparation method for zirconium mullite-vagcor composite diphase material, it is characterized in that first discarded molding sand, the alumina of 15～40wt% and the clay of 5～10wt% taking 50～80wt%, as raw material, mix moulding; Then under 1450～1600 DEG C of conditions, burn till, be incubated 3～5 hours, naturally cooling, make containing zirconium mullite-vagcor composite diphase material;
The Al of described discarded molding sand2O3Content >=35wt%, ZrO2Content >=5.0wt%, Fe2O3Content≤1.5wt%; Particle diameter≤the 0.15mm of discarded molding sand;
The Al of described alumina2O3Content >=75wt%, TiO2Content≤4.5wt%; Particle diameter≤the 0.089mm of alumina;
The Al of described clay2O3Content≤35wt%; Burning mistake >=the 10wt% of clay at 1000 DEG C.
2. containing zirconium mullite-vagcor composite diphase material, it is characterized in that described containing zirconium mullite-vagcor composite diphase material be the preparation method containing zirconium mullite-vagcor composite diphase material according to claim 1 prepared containing zirconium mullite-vagcor composite diphase material.
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| CN109608236A (en) * | 2019-01-08 | 2019-04-12 | 广东山摩新材料科技有限公司 | Silica silicon carbide refractory slab antioxidant coating and its application method |
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| CN115124358A (en) * | 2022-06-20 | 2022-09-30 | 北京金隅通达耐火技术有限公司 | Microporous zirconium mullite raw material and preparation method and application thereof |
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| CN1184788A (en) * | 1997-12-22 | 1998-06-17 | 李博文 | Method for preparing mullite-high silicone oxide glass using micro-powder of andalusite |
| CN1269748C (en) * | 2002-09-05 | 2006-08-16 | 吕志乾 | Bottom brick in tin pot |
| CN101423408A (en) * | 2008-11-27 | 2009-05-06 | 武汉科技大学 | Mullite-shrunk glass complex phase material and preparation method thereof |
| KR101218126B1 (en) * | 2010-09-14 | 2013-01-03 | (주)써모텍 | LTCC glass composition and glass ceramics manufactured by the TFT-LCD substrate glass and the manufacturing method of the same |
| CN102633512B (en) * | 2012-04-12 | 2013-06-19 | 武汉科技大学 | Abandoned molding sand based mullite light heat insulating bricks and preparation method thereof |
| CN102992785A (en) * | 2012-11-15 | 2013-03-27 | 中钢集团耐火材料有限公司 | Mullite-high-silica glass complex-phase refractory material for ceramic burner and manufacturing method thereof |
| CN103073275A (en) * | 2013-01-17 | 2013-05-01 | 武汉科技大学 | Abandoned sand-based mullite lightweight aggregate and preparation method thereof |
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| CN109608236A (en) * | 2019-01-08 | 2019-04-12 | 广东山摩新材料科技有限公司 | Silica silicon carbide refractory slab antioxidant coating and its application method |
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