CN104311116B - A kind of magnesium aluminate spinel foamed ceramics and preparation method thereof - Google Patents
A kind of magnesium aluminate spinel foamed ceramics and preparation method thereof Download PDFInfo
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Abstract
The present invention relates to a kind of magnesium aluminate spinel foamed ceramics and preparation method thereof.Its technical scheme is: be (2.4 ~ 2.7) 1 by the mass ratio of aluminum oxide fine powder magnesia powder, is raw material mixing by aluminum oxide fine powder and magnesia powder；It is 1 (0.6 ~ 1.8) by the mass ratio of sugared described raw material again, is that compound mixes by sugared and described raw material；Then in compound, add the sintering aid of described compound 0.1 ~ 0.5wt% and the AC foaming agent of 0.1 ~ 0.5wt%, mixing, obtain mixed powder；Described mixed powder is warming up to 100 ~ 200 DEG C, is incubated 1 ~ 3h, obtain the dispersion that mixed powder is dispersed in sugar liquation, more described dispersion is placed in calorstat and bubbles and solidify 8 ~ 25h；Finally the base substrate after solidification is warming up to 1500 ~ 1700 DEG C, is incubated 3 ~ 9h, obtains magnesium aluminate spinel foamed ceramics.Present invention process is simple and environmental friendliness；Prepared magnesium aluminate spinel foamed ceramics flawless, bulk density is low, through-hole rate is high and intensity is big.
Description
Technical field
The invention belongs to foamed ceramics technical field.It is specifically related to a kind of magnesium aluminate spinel foamed ceramics and preparation method thereof.
Background technology
The development of foamed ceramics starts from 20 century 70s, and it is a kind of porous ceramic articles having 3 D stereo network skeleton and being mutually communicated air hole structure.Foamed ceramics has the premium properties such as the porosity high, high temperature resistant, resist chemical, Heat stability is good, is widely used as the aspects such as molten metal filter, high-temperature gas exchange filter, ion-exchange filter and catalyst carrier.
Magnesium aluminate spinel (MgAl2O4) there is fusing point height (2135 DEG C), the series of advantages such as thermal coefficient of expansion is low, heat conductivity good and high-temperature stability is strong.Magnesium aluminate spinel foamed ceramics is the multiduty lightweight refracrories such as a kind of important metallurgical industry heat insulating refractory material and metallurgical industry filtration.
At present, magnesium aluminate spinel foamed ceramics mainly adopts hanging preparation technology, and mandruka is immersed in ceramic size, then passes through extruding and removes unnecessary slurry, and drying, sintering obtain foamed ceramics.Patented technology such as " a kind of magnesium aluminate spinel foam ceramic filter and preparation method thereof " (CN201310539992.0), though this technology has certain advantage, but still have the disadvantage in that (1) basic craft course includes slurrying, hanging, dry, sintering etc., complicated process of preparation；(2) intensity of foamed ceramics is not high；(3) goods have fine cracks even to ftracture；(4) toxic gas, contaminated environment are produced in the sintering stage.
The preparation method of magnesium aluminate spinel foamed ceramics also has gel injection-moulding method and foam method etc..Patented technology such as " a kind of method preparing lightweight magnesium-aluminum spinel heat-barrier material " (CN201210123564.5), though the method that this technology adopts foam method attached gel casting has certain advantage, but also have the disadvantage in that (1) has certain toxicity due to organic monomer, initiator and the catalyst used, to health and environmentally undesirable；(2) due to the one in the gel rubber system of use Methacrylamide, acrylamide and vinyl pyrrole ketone, improve cost, limit promoting the use of of product.
Summary of the invention
The preparation method that it is an object of the present invention to provide the simple and eco-friendly magnesium aluminate spinel foamed ceramics of a kind of technique；The magnesium aluminate spinel foamed ceramics flawless prepared by the method, bulk density is low, through-hole rate is high and intensity is big.
For achieving the above object, the technical solution used in the present invention is: the step of described preparation method is:
Step one, it is raw material mixing by aluminum oxide fine powder and magnesia powder, wherein: the mass ratio of aluminum oxide fine powder magnesia powder is (2.4 ~ 2.7) 1.
Step 2, it is that compound mixes by sugared and described raw material, wherein: the mass ratio of sugared described raw material is 1 (0.6 ~ 1.8).
Step 3, in compound, add the sintering aid of described compound 0.1 ~ 0.5wt% and the AC foaming agent of 0.1 ~ 0.5wt%, mix homogeneously, obtain mixed powder.
Step 4, mixed powder is warming up to 100 ~ 200 DEG C, is incubated 1 ~ 3h, obtain the dispersion that mixed powder is dispersed in sugar liquation, more described dispersion is placed in calorstat, bubble and solidify 8 ~ 25h, the base substrate after being solidified.
Step 5, by solidify after base substrate be warming up to 1500 ~ 1700 DEG C, be incubated 3 ~ 9h, obtain magnesium aluminate spinel foamed ceramics.
Described aluminum oxide fine powder is commercial alumina fine powder, α-Al2O3One in fine powder, white fused alumina fine powder, Brown Alundum fine powder, dense alumina fine powder and plate diamond spar fine powder, the particle diameter of described aluminum oxide fine powder is less than 44 μm.
Described magnesia powder is fused magnesite fine powder or is magnesite clinker fine powder, and the particle diameter of described magnesia powder is less than 44 μm.
Described sugar is the one in fructose, sucrose, glucose and maltose, and the purity of described sugar is more than 99.0wt%.
The temperature of described calorstat is 120 ~ 180 DEG C.
Described sintering aid is B2O3Micropowder, BC4Micropowder, MgF2Micropowder and AlF3One or both in micropowder.
Owing to adopting technique scheme, the present invention compared with prior art has the advantage that and good effect:
1, due to the fact that the hydrophilic between aluminum oxide fine powder and magnesia powder surface and glycan molecule-OH interacts, powder body can be relatively uniformly dispersed throughout in melted sugared liquation, the dispersion composition of gained is uniform, will not crack due to powder body skewness when burning till.
2, the present invention is using sugar as foaming agent, the water vapour that between-OH of glycan molecule, condensation produces is utilized to foam, the increase that produced bubble is adsorbed on gas-liquid interface and dispersion viscosity by fine particle is stablized, advantageously form uniform pore, ultimately form interconnective cellular microstructure, there is higher through-hole rate and intensity.
3, present invention process is simple, and without noxious gas emission in whole preparation process, is beneficial to environmental conservation.
4, the bulk density of the magnesium aluminate spinel foamed ceramics obtained by the present invention is 0.12 ~ 0.54g/cm3, compressive resistance reaches 2.50 ~ 10.2Mpa, and apparent porosity is 85% ~ 97%.
Therefore, the present invention has the simple and eco-friendly feature of technique；Prepared magnesium aluminate spinel foamed ceramics flawless, bulk density is low, through-hole rate is high and intensity is big.
Detailed description of the invention
Below in conjunction with embodiment, the invention will be further described, not the restriction to its protection domain.
For avoiding repeating, the existing technical parameter Unify legislation this detailed description of the invention related to is as follows, repeats no more in embodiment:
The particle diameter of described aluminum oxide fine powder is less than 44 μm.
The particle diameter of described magnesia powder is less than 44 μm.
The purity of described sugar is more than 99.0wt%.
Embodiment 1
A kind of magnesium aluminate spinel foamed ceramics and preparation method thereof.The step of preparation method described in the present embodiment is:
Step one, it is raw material mixing by aluminum oxide fine powder and magnesia powder, wherein: the mass ratio of aluminum oxide fine powder magnesia powder is (2.4 ~ 2.55) 1.
Step 2, it is that compound mixes by sugared and described raw material, wherein: the mass ratio of sugared described raw material is 1 (0.6 ~ 0.8).
Step 3, in compound, add the sintering aid of described compound 0.1 ~ 0.3wt% and the AC foaming agent of 0.1 ~ 0.3wt%, mix homogeneously, obtain mixed powder.
Step 4, mixed powder is warming up to 100 ~ 120 DEG C, is incubated 1 ~ 3h, obtain the dispersion that mixed powder is dispersed in sugar liquation, more described dispersion is placed in calorstat, bubble and solidify 8 ~ 15h, the base substrate after being solidified.
Step 5, by solidify after base substrate be warming up to 1500 ~ 1600 DEG C, be incubated 3 ~ 5h, obtain magnesium aluminate spinel foamed ceramics.
In the present embodiment: described aluminum oxide fine powder is commercial alumina fine powder；Described magnesia powder is fused magnesite fine powder；Described sugar is fructose；Described sintering aid is B2O3Micropowder；The temperature of described calorstat is 120 ~ 150 DEG C.
The bulk density of the magnesium aluminate spinel foamed ceramics obtained by the present embodiment is 0.12 ~ 0.20g/cm3, compressive resistance reaches 2.50 ~ 4.00Mpa, and apparent porosity is 93% ~ 97%.
Embodiment 2
A kind of magnesium aluminate spinel foamed ceramics and preparation method thereof.The step of preparation method described in the present embodiment is:
Step one, it is raw material mixing by aluminum oxide fine powder and magnesia powder, wherein: the mass ratio of aluminum oxide fine powder magnesia powder is (2.4 ~ 2.55) 1.
Step 2, it is that compound mixes by sugared and described raw material, wherein: the mass ratio of sugared described raw material is 1 (0.8 ~ 1.0).
Step 3, in compound, add the sintering aid of described compound 0.1 ~ 0.3wt% and the AC foaming agent of 0.3 ~ 0.5wt%, mix homogeneously, obtain mixed powder.
Step 4, mixed powder is warming up to 180 ~ 200 DEG C, is incubated 1 ~ 3h, obtain the dispersion that mixed powder is dispersed in sugar liquation, more described dispersion is placed in calorstat, bubble and solidify 15 ~ 25h, the base substrate after being solidified.
Step 5, by solidify after base substrate be warming up to 1500 ~ 1600 DEG C, be incubated 3 ~ 5h, obtain magnesium aluminate spinel foamed ceramics.
In the present embodiment: described aluminum oxide fine powder is α-Al2O3Fine powder；Described magnesia powder is magnesite clinker fine powder；Described sugar is sucrose；Described sintering aid is BC4Micropowder；The temperature of described calorstat is 150 ~ 180 DEG C.
The bulk density of the magnesium aluminate spinel foamed ceramics obtained by the present embodiment is 0.18 ~ 0.30g/cm3, compressive resistance reaches 3.60 ~ 6.10Mpa, and apparent porosity is 92% ~ 95%.
Embodiment 3
A kind of magnesium aluminate spinel foamed ceramics and preparation method thereof.The step of preparation method described in the present embodiment is:
Step one, it is raw material mixing by aluminum oxide fine powder and magnesia powder, wherein: the mass ratio of aluminum oxide fine powder magnesia powder is (2.4 ~ 2.55) 1.
Step 2, it is that compound mixes by sugared and described raw material, wherein: the mass ratio of sugared described raw material is 1 (1.0 ~ 1.2).
Step 3, in compound, add the sintering aid of described compound 0.1 ~ 0.3wt% and the AC foaming agent of 0.1 ~ 0.3wt%, mix homogeneously, obtain mixed powder.
Step 4, mixed powder is warming up to 150 ~ 180 DEG C, is incubated 1 ~ 3h, obtain the dispersion that mixed powder is dispersed in sugar liquation, more described dispersion is placed in calorstat, bubble and solidify 8 ~ 15h, the base substrate after being solidified.
Step 5, by solidify after base substrate be warming up to 1500 ~ 1600 DEG C, be incubated 5 ~ 7h, obtain magnesium aluminate spinel foamed ceramics.
In the present embodiment: described aluminum oxide fine powder is white fused alumina fine powder；Described magnesia powder is fused magnesite fine powder；Described sugar is glucose；Described sintering aid is MgF2Micropowder；The temperature of described calorstat is 150 ~ 180 DEG C.
The bulk density of the magnesium aluminate spinel foamed ceramics obtained by the present embodiment is 0.22 ~ 0.36g/cm3, compressive resistance reaches 3.85 ~ 6.80Mpa, and apparent porosity is 90% ~ 94%.
Embodiment 4
A kind of magnesium aluminate spinel foamed ceramics and preparation method thereof.The step of preparation method described in the present embodiment is:
Step one, it is raw material mixing by aluminum oxide fine powder and magnesia powder, wherein: the mass ratio of aluminum oxide fine powder magnesia powder is (2.4 ~ 2.55) 1.
Step 2, it is that compound mixes by sugared and described raw material, wherein: the mass ratio of sugared described raw material is 1 (1.2 ~ 1.4).
Step 3, in compound, add the sintering aid of described compound 0.3 ~ 0.5wt% and the AC foaming agent of 0.3 ~ 0.5wt%, mix homogeneously, obtain mixed powder.
Step 4, mixed powder is warming up to 120 ~ 150 DEG C, is incubated 1 ~ 3h, obtain the dispersion that mixed powder is dispersed in sugar liquation, more described dispersion is placed in calorstat, bubble and solidify 8 ~ 15h, the base substrate after being solidified.
Step 5, by solidify after base substrate be warming up to 1500 ~ 1600 DEG C, be incubated 7 ~ 9h, obtain magnesium aluminate spinel foamed ceramics.
In the present embodiment: described aluminum oxide fine powder is Brown Alundum fine powder；Described magnesia powder is magnesite clinker fine powder；Described sugar is maltose；Described sintering aid is AlF3Micropowder；The temperature of described calorstat is 150 ~ 180 DEG C.
The bulk density of the magnesium aluminate spinel foamed ceramics obtained by the present embodiment is 0.27 ~ 0.38g/cm3, compressive resistance reaches 5.24 ~ 7.20Mpa, and apparent porosity is 90% ~ 92%.
Embodiment 5
A kind of magnesium aluminate spinel foamed ceramics and preparation method thereof.The step of preparation method described in the present embodiment is:
Step one, it is raw material mixing by aluminum oxide fine powder and magnesia powder, wherein: the mass ratio of aluminum oxide fine powder magnesia powder is (2.55 ~ 2.7) 1.
Step 2, it is that compound mixes by sugared and described raw material, wherein: the mass ratio of sugared described raw material is 1 (1.4 ~ 1.6).
Step 3, in compound, add the sintering aid of described compound 0.1 ~ 0.3wt% and the AC foaming agent of 0.1 ~ 0.3wt%, mix homogeneously, obtain mixed powder.
Step 4, mixed powder is warming up to 100 ~ 120 DEG C, is incubated 1 ~ 3h, obtain the dispersion that mixed powder is dispersed in sugar liquation, more described dispersion is placed in calorstat, bubble and solidify 8 ~ 15h, the base substrate after being solidified.
Step 5, by solidify after base substrate be warming up to 1600 ~ 1700 DEG C, be incubated 3 ~ 5h, obtain magnesium aluminate spinel foamed ceramics.
In the present embodiment: described aluminum oxide fine powder is dense alumina fine powder；Described magnesia powder is fused magnesite fine powder；Described sugar is fructose；Described sintering aid is B2O3Micropowder and BC4The mixture of micropowder；The temperature of described calorstat is 120 ~ 150 DEG C.
The bulk density of the magnesium aluminate spinel foamed ceramics obtained by the present embodiment is 0.38 ~ 0.49g/cm3, compressive resistance reaches 7.20 ~ 9.60Mpa, and apparent porosity is 86% ~ 89%.
Embodiment 6
A kind of magnesium aluminate spinel foamed ceramics and preparation method thereof.The step of preparation method described in the present embodiment is:
Step one, it is raw material mixing by aluminum oxide fine powder and magnesia powder, wherein: the mass ratio of aluminum oxide fine powder magnesia powder is (2.55 ~ 2.7) 1.
Step 2, it is that compound mixes by sugared and described raw material, wherein: the mass ratio of sugared described raw material is 1 (1.6 ~ 1.8).
Step 3, in compound, add the sintering aid of described compound 0.3 ~ 0.5wt% and the AC foaming agent of 0.3 ~ 0.5wt%, mix homogeneously, obtain mixed powder.
Step 4, mixed powder is warming up to 150 ~ 180 DEG C, is incubated 1 ~ 3h, obtain the dispersion that mixed powder is dispersed in sugar liquation, more described dispersion is placed in calorstat, bubble and solidify 8 ~ 15h, the base substrate after being solidified.
Step 5, by solidify after base substrate be warming up to 1500 ~ 1600 DEG C, be incubated 7 ~ 9h, obtain magnesium aluminate spinel foamed ceramics.
In the present embodiment: described aluminum oxide fine powder is plate diamond spar fine powder；Described magnesia powder is fused magnesite fine powder；Described sugar is glucose；Described sintering aid is BC4Micropowder and MgF2The mixture of micropowder；The temperature of described calorstat is 150 ~ 180 DEG C.
The bulk density of the magnesium aluminate spinel foamed ceramics obtained by the present embodiment is 0.45 ~ 0.54g/cm3, compressive resistance reaches 8.40 ~ 10.20Mpa, and apparent porosity is 85% ~ 87%.
Embodiment 7
A kind of magnesium aluminate spinel foamed ceramics and preparation method thereof.The step of preparation method described in the present embodiment is:
Step one, it is raw material mixing by aluminum oxide fine powder and magnesia powder, wherein: the mass ratio of aluminum oxide fine powder magnesia powder is (2.4 ~ 2.55) 1.
Step 2, it is that compound mixes by sugared and described raw material, wherein: the mass ratio of sugared described raw material is 1 (1.0 ~ 1.2).
Step 3, in compound, add the sintering aid of described compound 0.3 ~ 0.5wt% and the AC foaming agent of 0.1 ~ 0.3wt%, mix homogeneously, obtain mixed powder.
Step 4, mixed powder is warming up to 180 ~ 200 DEG C, is incubated 1 ~ 3h, obtain the dispersion that mixed powder is dispersed in sugar liquation, more described dispersion is placed in calorstat, bubble and solidify 15 ~ 25h, the base substrate after being solidified.
Step 5, by solidify after base substrate be warming up to 1600 ~ 1700 DEG C, be incubated 5 ~ 7h, obtain magnesium aluminate spinel foamed ceramics.
In the present embodiment: described aluminum oxide fine powder is commercial alumina fine powder；Described magnesia powder is fused magnesite fine powder；Described sugar is sucrose；Described sintering aid is MgF2Micropowder and AlF3The mixture of micropowder；The temperature of described calorstat is 150 ~ 180 DEG C.
The bulk density of the magnesium aluminate spinel foamed ceramics obtained by the present embodiment is 0.24 ~ 0.36g/cm3, compressive resistance reaches 4.25 ~ 7.80Mpa, and apparent porosity is 90% ~ 94%.
Embodiment 8
A kind of magnesium aluminate spinel foamed ceramics and preparation method thereof.The step of preparation method described in the present embodiment is:
Step one, it is raw material mixing by aluminum oxide fine powder and magnesia powder, wherein: the mass ratio of aluminum oxide fine powder magnesia powder is (2.55 ~ 2.7) 1.
Step 2, it is that compound mixes by sugared and described raw material, wherein: the mass ratio of sugared described raw material is 1 (1.2 ~ 1.4).
Step 3, in compound, add the sintering aid of described compound 0.1 ~ 0.3wt% and the AC foaming agent of 0.3 ~ 0.5wt%, mix homogeneously, obtain mixed powder.
Step 4, mixed powder is warming up to 100 ~ 120 DEG C, is incubated 1 ~ 3h, obtain the dispersion that mixed powder is dispersed in sugar liquation, more described dispersion is placed in calorstat, bubble and solidify 8 ~ 15h, the base substrate after being solidified.
Step 5, by solidify after base substrate be warming up to 1600 ~ 1700 DEG C, be incubated 7 ~ 9h, obtain magnesium aluminate spinel foamed ceramics.
In the present embodiment: described aluminum oxide fine powder is α-Al2O3Fine powder；Described magnesia powder is fused magnesite fine powder；Described sugar is fructose；Described sintering aid is B2O3Micropowder and AlF3The mixture of micropowder；The temperature of described calorstat is 120 Ah ~ 150 DEG C.
The bulk density of the magnesium aluminate spinel foamed ceramics obtained by the present embodiment is 0.27 ~ 0.38g/cm3, compressive resistance reaches 6.04 ~ 8.20Mpa, and apparent porosity is 90% ~ 92%.
This detailed description of the invention compared with prior art has the advantage that and good effect:
1, this detailed description of the invention is due to the hydrophilic interaction between aluminum oxide fine powder and magnesia powder surface and glycan molecule-OH, powder body can be relatively uniformly dispersed throughout in melted sugared liquation, the dispersion composition of gained is uniform, will not crack due to powder body skewness when burning till.
2, this detailed description of the invention is using sugar as foaming agent, the water vapour that between-OH of glycan molecule, condensation produces is utilized to foam, the increase that produced bubble is adsorbed on gas-liquid interface and dispersion viscosity by fine particle is stablized, advantageously form uniform pore, ultimately form interconnective cellular microstructure, there is higher through-hole rate and intensity.
3, this detailed description of the invention technique is simple, and without noxious gas emission in whole preparation process, is beneficial to environmental conservation.
4, the bulk density of the magnesium aluminate spinel foamed ceramics obtained by this detailed description of the invention is 0.12 ~ 0.54g/cm3, compressive resistance reaches 2.50 ~ 10.2Mpa, and apparent porosity is 85% ~ 97%.
Therefore, this detailed description of the invention has the simple and eco-friendly feature of technique；Prepared magnesium aluminate spinel foamed ceramics flawless, bulk density is low, through-hole rate is high and intensity is big.
Claims (7)
1. the preparation method of a magnesium aluminate spinel foamed ceramics, it is characterised in that the step of described preparation method is:
Step one, it is raw material mixing by aluminum oxide fine powder and magnesia powder, wherein: the mass ratio of aluminum oxide fine powder magnesia powder is (2.4～2.7) 1；
Step 2, it is that compound mixes by sugared and described raw material, wherein: the mass ratio of sugared described raw material is 1 (0.6～1.8)；
Step 3, in compound, add the sintering aid of described compound 0.1～0.5wt% and the AC foaming agent of 0.1～0.5wt%, mix homogeneously, obtain mixed powder；
Step 4, mixed powder is warming up to 100～200 DEG C, is incubated 1～3h, obtain the dispersion that mixed powder is dispersed in sugar liquation, more described dispersion is placed in calorstat, bubble and solidify 8～25h, the base substrate after being solidified；
Step 5, by solidify after base substrate be warming up to 1500～1700 DEG C, be incubated 3～9h, obtain magnesium aluminate spinel foamed ceramics.
2. the preparation method of magnesium aluminate spinel foamed ceramics according to claim 1, it is characterised in that described aluminum oxide fine powder is commercial alumina fine powder, α-Al2O3One in fine powder, white fused alumina fine powder, Brown Alundum fine powder, dense alumina fine powder and plate diamond spar fine powder, the particle diameter of described aluminum oxide fine powder is less than 44 μm.
3. the preparation method of magnesium aluminate spinel foamed ceramics according to claim 1, it is characterised in that described magnesia powder is fused magnesite fine powder or is magnesite clinker fine powder, and the particle diameter of described magnesia powder is less than 44 μm.
4. the preparation method of magnesium aluminate spinel foamed ceramics according to claim 1, it is characterised in that described sugar is the one in fructose, sucrose, glucose and maltose, and the purity of described sugar is more than 99.0wt%.
5. the preparation method of magnesium aluminate spinel foamed ceramics according to claim 1, it is characterised in that the temperature of described calorstat is 120～180 DEG C.
6. the preparation method of magnesium aluminate spinel foamed ceramics according to claim 1, it is characterised in that described sintering aid is B2O3Micropowder, MgF2Micropowder and AlF3One or both in micropowder.
7. a magnesium aluminate spinel foamed ceramics, it is characterised in that described magnesium aluminate spinel foamed ceramics is the magnesium aluminate spinel foamed ceramics prepared by preparation method of the magnesium aluminate spinel foamed ceramics according to any one in claim 1～6.
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| CN105565795A (en) * | 2015-12-18 | 2016-05-11 | 湖南科技大学 | Preparation method of magnesia-alumina-spinel high-grade thermal-insulation material |
| CN108033775A (en) * | 2017-11-22 | 2018-05-15 | 海城利尔麦格西塔材料有限公司 | A kind of burned-magnesia brick and its production method that paper pulp is replaced with Dextrose Monohydrate |
| CN108484156B (en) * | 2018-04-12 | 2021-03-23 | 武汉理工大学 | Preparation method of spinel solid solution transparent ceramic based on powder hydrolysis resistance treatment and gel injection molding |
| CN109133987B (en) * | 2018-10-29 | 2021-09-24 | 成都府天高温材料科技有限公司 | Corundum-spinel breathable material and preparation method thereof |
| CN112279637A (en) * | 2020-11-03 | 2021-01-29 | 江苏省陶瓷研究所有限公司 | Alumina fiber-magnesia-alumina spinel porous ceramic and preparation method thereof |
| CN114180953A (en) * | 2021-12-01 | 2022-03-15 | 攀枝花钢城集团有限公司 | Method for synthesizing magnesia-alumina spinel from waste magnesium and aluminum-carbon bricks and magnesia-alumina spinel |
| CN115093204B (en) * | 2022-06-16 | 2023-05-09 | 襄阳聚力新材料科技有限公司 | Neutral furnace lining material for smelting nodulizer and inoculant |
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| CN102400028A (en) * | 2011-12-01 | 2012-04-04 | 北京科技大学 | Preparation method of metal matrix composite |
| CN102659398A (en) * | 2012-04-25 | 2012-09-12 | 中钢集团洛阳耐火材料研究院有限公司 | Method for manufacturing light magnesia-alumina spinel insulation materials |
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| CN102400028A (en) * | 2011-12-01 | 2012-04-04 | 北京科技大学 | Preparation method of metal matrix composite |
| CN102659398A (en) * | 2012-04-25 | 2012-09-12 | 中钢集团洛阳耐火材料研究院有限公司 | Method for manufacturing light magnesia-alumina spinel insulation materials |
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