CN111362581A - High-strength foam glass ceramics and preparation method thereof - Google Patents
High-strength foam glass ceramics and preparation method thereof Download PDFInfo
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- CN111362581A CN111362581A CN202010186399.2A CN202010186399A CN111362581A CN 111362581 A CN111362581 A CN 111362581A CN 202010186399 A CN202010186399 A CN 202010186399A CN 111362581 A CN111362581 A CN 111362581A
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- 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
- C03C11/00—Multi-cellular glass ; Porous or hollow glass or glass particles
- C03C11/007—Foam glass, e.g. obtained by incorporating a blowing agent and heating
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- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/08—Other methods of shaping glass by foaming
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- 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
- C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
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- 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
- C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
- C03C1/002—Use of waste materials, e.g. slags
-
- 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
- C03C10/0009—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 silica as main constituent
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacturing & Machinery (AREA)
- Ceramic Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Glass Compositions (AREA)
Abstract
The invention relates to high-strength foam glass ceramics and a preparation method thereof, belonging to the technical field of glass. The foam glass ceramics prepared by the invention consists of three parts of a glass phase, a gas phase and a crystal phase, and a large number of air holes and nano-scale micro crystals are uniformly distributed in a glass phase matrix; the microcrystalline phase and the matrix glass phase of the foam microcrystalline glass have different thermal expansion coefficients, when the expansion coefficient of the crystal is higher than that of the surrounding glass phase, the radial stress of the glass is tensile stress, the boundary stress is reduced to be small due to the small average crystal size, the point of the microcrack can be passivated and bent by the grain boundary structure in the foam microcrystalline glass, the fracture energy is increased, and the crack can be slowed down or even prevented from penetrating through the interface between the crystalline phase and the glass phase, so that the mechanical strength of the foam microcrystalline glass is improved.
Description
Technical Field
The invention relates to high-strength foam glass ceramics and a preparation method thereof, belonging to the technical field of glass.
Background
The foam glass is a glass material I filled with countless uniform, tiny, communicated or closed air holes, so that the foam glass is called porous glass, the pore size distribution range of the foam glass is 0.1-5 mm, the porosity can reach 50% -95%, the foam glass is sound-absorbing, noise-reducing, heat-insulating and heat-insulating material with excellent performance, the density of the foam glass is small, the foam glass is not burnt, the heat conductivity coefficient is small, the chemical stability is good, no corrosion effect is caused on other objects, no radioactivity is generated, and the foam glass is not easy to age. However, the foam glass on the market still has the defects of low mechanical strength and poor thermal shock resistance, and is not suitable for being used as a wall bearing material.
Disclosure of Invention
The invention mainly solves the technical problems that: aiming at the problems of low mechanical strength and poor thermal shock resistance of the existing foam glass, the preparation method of the high-strength foam glass ceramics is provided.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the high-strength foam glass ceramic is characterized by comprising, by weight, 20-40 parts of silicon dioxide, 12-16 parts of aluminum oxide, 8-16 parts of zirconium dioxide, 1-3 parts of titanium dioxide, 0.4-0.8 part of germanium dioxide, 0.8-1.6 parts of calcium fluoride, 1.6-3.2 parts of magnesium nitrate, 2-4 parts of calcium sulfate, 4-8 parts of slag, 2-4 parts of manganese dioxide, 2-4 parts of trisodium phosphate, 1-3 parts of borax and 40-80 parts of absolute ethyl alcohol.
Further, the high-strength foam glass ceramics and the preparation method thereof comprise the following preparation steps:
(1) adding silicon dioxide, aluminum oxide, zirconium dioxide, titanium dioxide, germanium dioxide, calcium fluoride, magnesium nitrate, calcium sulfate and slag into absolute ethyl alcohol, ball-milling for 20-24 hours at normal temperature, and sieving to obtain mixed slurry;
(2) placing the mixed slurry in a quartz crucible, placing the quartz crucible in a box type resistance furnace, heating to 1500-1600 ℃, and preserving heat to obtain glass liquid;
(3) cooling the glass liquid, placing the glass liquid in a ball milling tank, carrying out ball milling for 12-24 h at normal temperature, and sieving to obtain glass powder;
(4) adding manganese dioxide, trisodium phosphate and borax into glass powder, placing the glass powder in a box-type resistance furnace, heating to 400-500 ℃ at normal temperature, preserving heat for 2-4 h, heating to 1000-1200 ℃, preserving heat for 4-8 h, cooling and annealing to obtain the foamed microcrystalline glass with the average particle size.
Further, the rotating speed of the ball milling in the step (1) is 200-300 r/min.
Further, the mesh number of the sieve in the step (1) is 170-230 meshes.
Further, the temperature rise rate of the step (2) is 20 ℃/min.
Further, the heat preservation time in the step (2) is 3-5 h.
Further, the rotation speed of the ball milling in the step (3) is 250-350 r/min.
Further, the mesh number of the sieve in the step (3) is 200-270 meshes.
Further, the temperature rise rate in the step (4) is 15 ℃/min.
The invention has the beneficial effects that:
(1) the invention relates to a high-strength foam glass ceramic and a preparation method thereof, wherein the foam glass ceramic prepared by the invention takes titanium dioxide as a nucleating agent, is prepared by ball-milling, mixing uniformly to reach a certain fineness, putting the mixture into a mould and firing the mixture in a heating furnace, and the foam glass ceramic prepared by the invention consists of three parts of a glass phase, a gas phase and a crystal phase, and a large number of air holes and nano-scale micro crystals are uniformly distributed in a glass phase matrix; the elastic modulus of the foam glass ceramics is far greater than that of the foam glass, the microcrystalline phase and the matrix glass phase have different thermal expansion coefficients, when the expansion coefficient of the crystals is higher than that of the surrounding glass phase, the radial stress of the glass is tensile stress, the boundary stress is reduced to be small due to small average crystal size, the tip of the microcrack can be passivated and bent by a crystal boundary structure in the foam glass ceramics, the fracture energy is increased, cracks can be slowed down or even prevented from penetrating through an interface between the crystalline phase and the glass phase, and therefore the mechanical strength of the foam glass ceramics is improved.
(2) The invention takes trisodium phosphate as a foam stabilizer, and adds a cosolvent borax to prepare the high-strength foam glass ceramics, the foam stabilizer can improve the viscosity of glass liquid of a batch, expand the foaming temperature range, ensure the stability of bubbles in a sample, reduce communication holes as much as possible, the trisodium phosphate is taken as the foam stabilizer, the foam stabilizer can be decomposed at high temperature to generate sodium oxide and phosphorus pentoxide, the phosphorus pentoxide can provide network forming ions to form tetrahedrons, the tetrahedrons can jointly form a continuous network, the bubbles can be stably existed due to higher viscosity at high temperature, the borax can be decomposed into diboron trioxide and sodium oxide as a cosolvent, boron usually exists in the form of a triangular body or a tetrahedron, the glass structure can be more compact, and the thermal shock resistance of the foam glass ceramics can be improved.
Detailed Description
Respectively weighing 20-40 parts of silicon dioxide, 12-16 parts of aluminum oxide, 8-16 parts of zirconium dioxide, 1-3 parts of titanium dioxide, 0.4-0.8 part of germanium dioxide, 0.8-1.6 parts of calcium fluoride, 1.6-3.2 parts of magnesium nitrate, 2-4 parts of calcium sulfate, 4-8 parts of slag, 2-4 parts of manganese dioxide, 2-4 parts of trisodium phosphate, 1-3 parts of borax and 40-80 parts of absolute ethyl alcohol, adding the silicon dioxide, the aluminum oxide, the zirconium dioxide, the titanium dioxide, the germanium dioxide, the calcium fluoride, the magnesium nitrate, the calcium sulfate and the slag into the absolute ethyl alcohol, ball-milling at the rotating speed of 200-300 r/min for 20-24 h at normal temperature, sieving through a sieve of 170-230 meshes to obtain mixed slurry, placing the mixed slurry into a quartz crucible, placing into a box resistor furnace, heating to 1500-1600 ℃ at the speed of 20 ℃/min, and preserving heat for 3-5 h to obtain glass liquid, cooling the glass liquid, placing the glass liquid in a ball milling tank for ball milling for 12-24 h, sieving the glass liquid with a 200-270-mesh sieve to obtain glass powder, adding manganese dioxide, trisodium phosphate and borax into the glass powder, placing the glass powder in a box-type resistance furnace, heating the glass powder to 400-500 ℃ at the normal temperature at the speed of 5 ℃/min, preserving the heat for 2-4 h, heating the glass powder to 1000-1200 ℃ at the speed of 15 ℃/min, preserving the heat for 4-8 h, cooling and annealing to obtain the foamed glass-ceramic with the average particle size.
Example 1
Respectively weighing 20 parts of silicon dioxide, 12 parts of aluminum oxide, 8 parts of zirconium dioxide, 1 part of titanium dioxide, 0.4 part of germanium dioxide, 0.8 part of calcium fluoride, 1.6 parts of magnesium nitrate, 2 parts of calcium sulfate, 4 parts of slag, 2 parts of manganese dioxide, 2 parts of trisodium phosphate, 1 part of borax and 40 parts of absolute ethyl alcohol, adding the silicon dioxide, the aluminum oxide, the zirconium dioxide, the titanium dioxide, the germanium dioxide, the calcium fluoride, the magnesium nitrate, the calcium sulfate and the slag into the absolute ethyl alcohol, ball-milling at the rotating speed of 200r/min for 20 hours at normal temperature, sieving by 170 meshes to obtain mixed slurry, placing the mixed slurry into a quartz crucible, placing into a box-type resistance furnace, heating to 1500 ℃ at the speed of 20 ℃/min, preserving the temperature for 3 hours to obtain molten glass, cooling the molten glass, placing into a ball-milling tank for ball-milling for 12 hours, sieving by 200 meshes to obtain glass powder, and placing the manganese dioxide, the trisodium, Adding borax into glass powder, placing in a box-type resistance furnace, heating to 400 deg.C at a rate of 5 deg.C/min at normal temperature, maintaining for 2h, heating to 1000 deg.C at a rate of 15 deg.C/min, maintaining for 4h, cooling, and annealing to obtain foam glass ceramics.
Example 2
Respectively weighing 28 parts of silicon dioxide, 14 parts of aluminum oxide, 12 parts of zirconium dioxide, 2 parts of titanium dioxide, 0.6 part of germanium dioxide, 1.2 parts of calcium fluoride, 2.4 parts of magnesium nitrate, 3 parts of calcium sulfate, 6 parts of slag, 3 parts of manganese dioxide, 3 parts of trisodium phosphate, 2 parts of borax and 60 parts of absolute ethyl alcohol, adding the silicon dioxide, the aluminum oxide, the zirconium dioxide, the titanium dioxide, the germanium dioxide, the calcium fluoride, the magnesium nitrate, the calcium sulfate and the slag into the absolute ethyl alcohol, ball-milling at the normal temperature at the rotating speed of 200r/min for 22 hours, sieving by a 200 mesh sieve to obtain mixed slurry, placing the mixed slurry into a quartz crucible, placing the quartz crucible into a box-type resistance furnace, heating to 1550 ℃ at the speed of 20 ℃/min, keeping the temperature for 4 hours to obtain glass liquid, cooling the glass liquid, placing the glass liquid into a ball-milling tank for 18 hours, sieving by a 230 mesh sieve to obtain glass powder, and placing, Adding borax into glass powder, placing in a box-type resistance furnace, heating to 450 deg.C at a rate of 5 deg.C/min at normal temperature, maintaining for 3h, heating to 1100 deg.C at a rate of 15 deg.C/min, maintaining for 6h, cooling, and annealing to obtain foam glass ceramics.
Example 3
Respectively weighing 20-40 parts of silicon dioxide, 12-16 parts of aluminum oxide, 8-16 parts of zirconium dioxide, 1-3 parts of titanium dioxide, 0.4-0.8 part of germanium dioxide, 0.8-1.6 parts of calcium fluoride, 1.6-3.2 parts of magnesium nitrate, 2-4 parts of calcium sulfate, 4-8 parts of slag, 2-4 parts of manganese dioxide, 2-4 parts of trisodium phosphate, 1-3 parts of borax and 40-80 parts of absolute ethyl alcohol, adding the silicon dioxide, the aluminum oxide, the zirconium dioxide, the titanium dioxide, the germanium dioxide, the calcium fluoride, the magnesium nitrate, the calcium sulfate and the slag into the absolute ethyl alcohol, ball-milling at the rotating speed of 200-300 r/min for 20-24 h at normal temperature, passing through 170-230 meshes to obtain mixed slurry, placing the mixed slurry into a quartz crucible, placing into a box-type resistance furnace, heating to 1500-1600 ℃ at the speed of 20 ℃/min, and preserving heat for 3-5 h to obtain glass liquid, cooling the glass liquid, placing the glass liquid in a ball milling tank, ball milling the glass liquid for 12-24 hours at the rotation speed of 250-350 r/min at normal temperature, sieving the glass liquid with a 200-270-mesh sieve to obtain glass powder, adding manganese dioxide, trisodium phosphate and borax into the glass powder, placing the glass powder in a box type resistance furnace, heating the glass powder to 400-500 ℃ at the normal temperature at the speed of 5 ℃/min, preserving the heat for 2-4 hours, heating the glass powder to 1000-1200 ℃ at the speed of 15 ℃/min, preserving the heat for 4-8 hours, cooling and annealing to obtain the foam glass ceramics.
Example 4
Respectively weighing 20-40 parts of silicon dioxide, 12-16 parts of aluminum oxide, 8-16 parts of zirconium dioxide, 1-3 parts of titanium dioxide, 0.4-0.8 part of germanium dioxide, 0.8-1.6 parts of calcium fluoride, 1.6-3.2 parts of magnesium nitrate, 2-4 parts of calcium sulfate, 4-8 parts of slag, 2-4 parts of manganese dioxide, 2-4 parts of trisodium phosphate, 1-3 parts of borax and 40-80 parts of absolute ethyl alcohol, adding the silicon dioxide, the aluminum oxide, the zirconium dioxide, the titanium dioxide, the germanium dioxide, the calcium fluoride, the magnesium nitrate, the calcium sulfate and the slag into the absolute ethyl alcohol, ball-milling at the rotating speed of 200-300 r/min for 20-24 h at normal temperature, passing through 170-230 meshes to obtain mixed slurry, placing the mixed slurry into a quartz crucible, placing into a box-type resistance furnace, heating to 1500-1600 ℃ at the speed of 20 ℃/min, and preserving heat for 3-5 h to obtain glass liquid, cooling the glass liquid, placing the glass liquid in a ball milling tank for ball milling for 12-24 h, sieving the glass liquid with a 200-270-mesh sieve to obtain glass powder, adding manganese dioxide, trisodium phosphate and borax into the glass powder, placing the glass powder in a box-type resistance furnace, heating the glass powder to 400-500 ℃ at the normal temperature at the speed of 5 ℃/min, preserving the heat for 2-4 h, heating the glass powder to 1000-1200 ℃ at the speed of 15 ℃/min, preserving the heat for 4-8 h, cooling and annealing to obtain the foam glass ceramics.
Comparative example
Respectively weighing 10 parts of silicon dioxide, 6 parts of aluminum oxide, 4 parts of zirconium dioxide, 02 parts of germanium dioxide, 0.4 part of calcium fluoride, 0.8 part of magnesium nitrate, 2 parts of calcium sulfate, 2 parts of slag, 1 part of manganese dioxide, 1 part of trisodium phosphate, 0.8 part of borax and 30 parts of absolute ethyl alcohol, adding the silicon dioxide, the aluminum oxide, the zirconium dioxide, the germanium dioxide, the calcium fluoride, the magnesium nitrate, the calcium sulfate and the slag into the absolute ethyl alcohol, ball-milling at the rotating speed of 180r/min for 16 hours at normal temperature, sieving by 200 meshes to obtain mixed slurry, placing the mixed slurry into a quartz crucible, placing into a box-type resistance furnace, heating to 1400 ℃ at the speed of 20 ℃/min, preserving the temperature for 2 hours to obtain glass liquid, cooling the glass liquid, placing into a ball-milling tank for ball-milling for 10 hours, sieving by 200 meshes to obtain glass powder, adding the manganese dioxide, the trisodium phosphate and the borax into the glass powder, and (3) placing the glass into a box-type resistance furnace, heating to 350 ℃ at the normal temperature at the speed of 5 ℃/min, preserving heat for 1.5h, heating to 8200 ℃ at the speed of 15 ℃/min, preserving heat for 3h, cooling and annealing to obtain the foam glass ceramics.
Examples of the experiments
The foamed glass ceramics prepared in the above examples and comparative examples are respectively tested, and the test contents include the bending strength and the thermal expansion performance.
Bending strength: preparing a sample, wherein the length is more than 35mm, the width is 4 +/-0.2 mm, the thickness is 3 +/-0.2, and the parallelism of a stress surface is within 0.05 mm; measuring the width and thickness of a sample by using a vernier caliper with the precision of 0.02, wherein a test point is positioned as close to the midpoint of the sample as possible, the distance between supporting points is measured, the sample is placed on a test table of a universal material testing machine, the good contact between the sample and the supporting rod is checked to ensure that a continuous linear load exists, and the transverse beam is controlled to move through the operation of a computer to carry out the bending strength test; the bending strength of the test sample when the test sample is broken can be directly recorded after the test is finished, the number of the test samples is 3, and the final result is taken as the average value.
Thermal expansion performance, preparing a sample with the size of 5mm × 5mm × 50mm, placing the sample on a sample table, fixing the position of a furnace chamber of a high-temperature horizontal expansion instrument, setting the temperature range of the test on a computer through software, and obtaining thermal expansion coefficients at different temperatures, wherein the specific results are shown in table 1:
table 1 table for testing properties of foamed glass ceramics prepared in examples and comparative examples
| Item | Bending strength | Coefficient of thermal expansion (100-300 ℃ C.) |
| Example 1 | 14.26MPa | 6.6824 |
| Example 2 | 14.12MPa | 6.3652 |
| Example 3 | 13.98MPa | 6.5897 |
| Example 4 | 14.06MPa | 6.4283 |
| Comparative example | 10.28MPa | 8.1528 |
As shown in Table 1, the foam glass ceramics prepared by the invention have good bending strength and thermal expansion coefficient, and have wide development prospect.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
Claims (9)
1. The high-strength foam glass ceramic is characterized by comprising, by weight, 20-40 parts of silicon dioxide, 12-16 parts of aluminum oxide, 8-16 parts of zirconium dioxide, 1-3 parts of titanium dioxide, 0.4-0.8 part of germanium dioxide, 0.8-1.6 parts of calcium fluoride, 1.6-3.2 parts of magnesium nitrate, 2-4 parts of calcium sulfate, 4-8 parts of slag, 2-4 parts of manganese dioxide, 2-4 parts of trisodium phosphate, 1-3 parts of borax and 40-80 parts of absolute ethyl alcohol.
2. The high-strength foam glass-ceramic and the preparation method thereof according to claim 1 are characterized by comprising the following preparation steps:
(1) adding silicon dioxide, aluminum oxide, zirconium dioxide, titanium dioxide, germanium dioxide, calcium fluoride, magnesium nitrate, calcium sulfate and slag into absolute ethyl alcohol, ball-milling for 20-24 hours at normal temperature, and sieving to obtain mixed slurry;
(2) placing the mixed slurry in a quartz crucible, placing the quartz crucible in a box type resistance furnace, heating to 1500-1600 ℃, and preserving heat to obtain glass liquid;
(3) cooling the glass liquid, placing the glass liquid in a ball milling tank, carrying out ball milling for 12-24 h at normal temperature, and sieving to obtain glass powder;
(4) adding manganese dioxide, trisodium phosphate and borax into glass powder, placing the glass powder in a box-type resistance furnace, heating to 400-500 ℃ at normal temperature, preserving heat for 2-4 h, heating to 1000-1200 ℃, preserving heat for 4-8 h, cooling and annealing to obtain the foamed microcrystalline glass with the average particle size.
3. The high-strength foam glass-ceramic and the preparation method thereof as claimed in claim 2, wherein the rotation speed of the ball milling in the step (1) is 200 to 300 r/min.
4. The high-strength foam glass-ceramic and the preparation method thereof as claimed in claim 2, wherein the mesh number of the screen in the step (1) is 170-230 meshes.
5. The high-strength foamed glass-ceramic and its preparation method as claimed in claim 2, wherein the temperature raising rate in step (2) is 20 ℃/min.
6. The high-strength foam glass-ceramic and the preparation method thereof according to claim 2, wherein the heat preservation time in the step (2) is 3-5 h.
7. The high-strength foam glass-ceramic and the preparation method thereof as claimed in claim 2, wherein the rotation speed of the ball milling in the step (3) is 250-350 r/min.
8. The high-strength foam glass-ceramic and the preparation method thereof as claimed in claim 2, wherein the mesh number of the screen in the step (3) is 200-270 mesh.
9. The high-strength foam glass-ceramic and the preparation method thereof as claimed in claim 2, wherein the temperature rise rate in the step (4) is 15 ℃/min.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010186399.2A CN111362581A (en) | 2020-03-17 | 2020-03-17 | High-strength foam glass ceramics and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010186399.2A CN111362581A (en) | 2020-03-17 | 2020-03-17 | High-strength foam glass ceramics and preparation method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113788623A (en) * | 2021-09-24 | 2021-12-14 | 北京科技大学 | Method for preparing foam glass ceramics by secondary aluminum ash without pretreatment |
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2020
- 2020-03-17 CN CN202010186399.2A patent/CN111362581A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113788623A (en) * | 2021-09-24 | 2021-12-14 | 北京科技大学 | Method for preparing foam glass ceramics by secondary aluminum ash without pretreatment |
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Application publication date: 20200703 |