CN112226817A - Tobermorite whisker and microwave hydrothermal synthesis method thereof - Google Patents

Tobermorite whisker and microwave hydrothermal synthesis method thereof Download PDF

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Publication number
CN112226817A
CN112226817A CN202011075223.6A CN202011075223A CN112226817A CN 112226817 A CN112226817 A CN 112226817A CN 202011075223 A CN202011075223 A CN 202011075223A CN 112226817 A CN112226817 A CN 112226817A
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tobermorite
whiskers
whisker
hydrothermal synthesis
microwave
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罗树琼
常金丹
杨雷
赵明慧
王雨利
管学茂
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Henan University of Technology
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Henan University of Technology
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    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
    • C30B29/60—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape characterised by shape
    • C30B29/62—Whiskers or needles
    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B29/00—Single crystals or homogeneous polycrystalline material with defined structure characterised by the material or by their shape
    • C30B29/10—Inorganic compounds or compositions
    • C30B29/34—Silicates
    • C—CHEMISTRY; METALLURGY
    • C30—CRYSTAL GROWTH
    • C30B—SINGLE-CRYSTAL GROWTH; UNIDIRECTIONAL SOLIDIFICATION OF EUTECTIC MATERIAL OR UNIDIRECTIONAL DEMIXING OF EUTECTOID MATERIAL; REFINING BY ZONE-MELTING OF MATERIAL; PRODUCTION OF A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; SINGLE CRYSTALS OR HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; AFTER-TREATMENT OF SINGLE CRYSTALS OR A HOMOGENEOUS POLYCRYSTALLINE MATERIAL WITH DEFINED STRUCTURE; APPARATUS THEREFOR
    • C30B7/00—Single-crystal growth from solutions using solvents which are liquid at normal temperature, e.g. aqueous solutions
    • C30B7/10—Single-crystal growth from solutions using solvents which are liquid at normal temperature, e.g. aqueous solutions by application of pressure, e.g. hydrothermal processes

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Inorganic Chemistry (AREA)
  • Silicates, Zeolites, And Molecular Sieves (AREA)

Abstract

The invention provides tobermorite whiskers and a microwave hydrothermal synthesis method thereof, wherein the tobermorite whiskers are flaky whiskers, the width of the whiskers is 100-300nm, and the length of the whiskers is 1-5 mu m, and the synthesis method comprises the following steps: the method comprises the following steps: uniformly mixing calcium hydroxide and fumed silica according to the molar ratio of calcium to silicon of 0.7-1:1, then adding deionized water according to the liquid-solid ratio of 10-30mL/g, and uniformly mixing to obtain mixed slurry; step two: and (3) placing the mixed slurry obtained in the step one into a microwave reaction kettle, heating to 180 ℃ and 220 ℃ by microwave heating, uniformly stirring for reaction for 2-8h, and then treating to obtain the catalyst. The invention has the advantages of simple synthetic process, high reaction speed, short time and low energy consumption.

Description

Tobermorite whisker and microwave hydrothermal synthesis method thereof
Technical Field
The invention belongs to the technical field of inorganic non-metallic material synthesis, particularly relates to the field of tobermorite synthesis, and particularly relates to tobermorite whiskers and a microwave hydrothermal synthesis method thereof.
Background
The tobermorite is widely applied to heat insulation materials due to light weight, high strength, low heat conductivity coefficient and good heat resistance. Meanwhile, due to the structural characteristics of the tobermorite, the tobermorite can be widely used as a cation exchanger and an adsorbent to remove heavy metal ions in wastewater. At present, the synthesis of tobermorite is mainly based on the traditional hydrothermal synthesis method, the traditional method is a main energy consumption process for preparing tobermorite due to long reaction time, and in the traditional hydrothermal synthesis method, heat is transmitted from the outside of a system to the inside of the system, temperature gradient is generated, heating is uneven, most of energy is absorbed by a wall of the device, energy loss is large, and the heating rate is slow.
Chinese patent CN106315605A discloses a method for preparing 1.1nm tobermorite by using low-grade attapulgite clay, which comprises the steps of crushing low-grade attapulgite clay ore to obtain 150-mesh powder of 300 meshes, dispersing the powder into silicate aqueous solution, and performing microwave activation treatment for 5-10 minutes to form stable suspension A; dispersing calcium salt in water to form a uniform dispersion B; slowly adding the dispersion liquid B into the suspension liquid A under the condition of rapid stirring, and fully and uniformly mixing to obtain precursor suspension liquid; transferring the precursor suspension into a hydrothermal reaction kettle for hydrothermal reaction, and then cooling to room temperature; and separating, washing, drying and crushing the solid product to obtain the 1.1nm tobermorite.
Although the microwave activation treatment is carried out, the main synthesis process still adopts the traditional hydrothermal synthesis method, and the problems of large energy loss and low heating rate of the traditional hydrothermal synthesis method are still not solved.
Disclosure of Invention
The invention aims to solve the technical problems of high energy consumption and long time consumption of hydrothermal synthesis of tobermorite in the prior art, and provides tobermorite whiskers and a microwave hydrothermal synthesis method thereof.
In order to achieve the above purpose, the invention provides the following technical scheme:
the tobermorite whisker is flaky whisker, the width of the whisker is 100-300nm, and the length of the whisker is 1-5 mu m.
Tolbezite whiskers as described above preferably have a whisker width of 200-300nm and a length of 2-5 μm.
A microwave hydrothermal synthesis method of tobermorite whiskers comprises the following steps:
the method comprises the following steps: uniformly mixing calcium hydroxide and fumed silica according to the molar ratio of calcium to silicon of 0.7-1:1 to form a solid mixture, then adding deionized water into the solid mixture according to the liquid-solid ratio of 10-30mL/g, and uniformly mixing to obtain mixed slurry;
step two: and (3) placing the mixed slurry obtained in the step one into a microwave reaction kettle, heating to 180 ℃ and 220 ℃ by microwave, uniformly stirring for reaction for 2-8h, and performing post-treatment to obtain the catalyst.
According to the microwave hydrothermal synthesis method of tobermorite whiskers, preferably, in the step one, the calcium hydroxide and the fumed silica are uniformly mixed according to the calcium-silicon molar ratio of 0.83: 1.
According to the microwave hydrothermal synthesis method of tobermorite whiskers, preferably, in the step one, the deionized water is added according to the liquid-solid ratio of 30 mL/g.
In the microwave hydrothermal synthesis method of tobermorite whiskers, preferably, in the second step, the stirring speed is 100-.
Preferably, in the second step, the temperature is raised to 200-220 ℃ by microwave heating, and the reaction is uniformly stirred for 2 h.
Preferably, in the second step, the post-treatment is performed by the following specific operations: and cooling the reaction system to room temperature, filtering to obtain solid precipitate, washing the obtained solid precipitate, and drying in vacuum at the temperature of 40-60 ℃ to obtain the tobermorite whisker.
The microwave hydrothermal synthesis method of tobermorite whiskers comprises the steps of preparing the tobermorite whiskers into flaky whiskers, wherein the width of the whiskers is 100-300nm, and the length of the whiskers is 1-5 μm, preferably, the width of the whiskers is 200-300nm, and the length of the whiskers is 2-5 μm.
Compared with the closest prior art, the technical scheme provided by the invention has the following beneficial effects:
microwave heating is the body heating that the material is aroused by dielectric material's dielectric loss in the electromagnetic field, the inside and outside concurrent heating of material, the heating is even, rate of rise is fast simultaneously, compare more have the heating even than traditional heating, advantages such as reaction rate is fast, consequently with microwave hydrothermal synthesis tubei mullite aggravate the collision between hydrone and the raw materials molecule, the reaction is more quick and even, consequently can synthesize tubei mullite whisker fast in the short time, can save time, practice thrift the energy consumption.
The microwave heating can heat the inside and the outside of the material simultaneously without any heat conduction process, the heating speed is high and uniform, and the heating purpose can be achieved only by one or more than one of the energy consumption of the traditional heating mode. Therefore, the method for synthesizing tobermorite by microwave heating can greatly shorten the reaction time, improve the reaction efficiency, save the energy consumption and have important environmental protection significance for social sustainable development.
Drawings
Fig. 1 is an SEM image of tobermorite whiskers synthesized in example 1;
FIG. 2 is an SEM image of tobermorite whiskers synthesized in example 2;
fig. 3 is an SEM image of tobermorite whiskers synthesized in example 3.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments that can be derived by one of ordinary skill in the art from the embodiments given herein are intended to be within the scope of the present invention.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The embodiment of the invention provides tobermorite whiskers, wherein the tobermorite whiskers are flaky whiskers, the width of the whiskers is 100-300nm, and the length of the whiskers is 1-5 mu m, preferably, the width of the whiskers is 200-300nm, and the length of the whiskers is 2-5 mu m.
The embodiment of the invention also provides a microwave hydrothermal synthesis method of the tobermorite whisker, which comprises the following steps:
the method comprises the following steps: uniformly mixing calcium hydroxide and fumed silica according to a molar ratio of calcium to silicon of 0.7-1:1 (such as 0.8:1, 0.9:1, 1:1 and the like), adding deionized water according to a liquid-solid ratio of 10-30mL/g (such as 10, 15, 20, 25, 30mL/g and the like) and uniformly mixing to obtain mixed slurry (the mixed slurry is in a suspension state);
step two: and (2) putting the mixed slurry obtained in the step one into a microwave reaction kettle, heating to 180-220 ℃ (such as 185, 190, 195, 200, 210, 215 ℃ and the like) by microwave heating, uniformly stirring for reacting for 2-8h (such as 2, 3, 4, 5, 6, 7, 8h and the like), and performing post-treatment to obtain the catalyst.
According to the method, the tobermorite whisker is prepared by taking calcium hydroxide and fumed silica as raw materials, the step of generating calcium hydroxide by reacting calcium oxide with water is omitted by taking the calcium hydroxide as the raw material, and after deionized water is added, the calcium hydroxide is hydrolyzed into calcium ions and hydroxyl ions, so that the dissolution of silicon dioxide is facilitated under an alkaline condition; the fumed silica is amorphous silica, the crystalline silica has extremely low solubility and very low activity at low temperature, the amorphous silica has high activity and much higher solubility at low temperature than the crystalline silica, especially when the silica and calcium hydroxide exist simultaneously, the solubility of the silica is obviously increased, and the silica is dissolvedIn the process, the silica combines with hydroxide ions in solution to form [ H ]2SiO4]2-Thereby achieving the purpose of dissolution, simultaneously consuming hydroxide ions, being beneficial to the hydrolysis of calcium hydroxide, increasing the solubility of the calcium hydroxide and finally being beneficial to the formation of tobermorite whiskers.
On the basis of the raw materials, the invention adopts a microwave heating mode to carry out hydrothermal synthesis, the microwave heating is bulk heating of the materials in an electromagnetic field caused by dielectric loss of dielectric materials, so that the inside and the outside of the materials are simultaneously heated and simultaneously heated, the heating speed is high and uniform, and the heating purpose can be achieved only by one or more than one of the energy consumption of the traditional heating mode. Therefore, the method adopts microwave heating to synthesize tobermorite, so that the reaction time can be greatly shortened, the product can be obtained within 2 hours, and the reaction efficiency is greatly improved.
According to the invention, the changes of the calcium-silicon ratio, the liquid-solid ratio, the reaction temperature and the reaction time basically do not influence the crystal form of the tobermorite, but only cause the change of the shape of the whisker, and the further description is provided below.
In the specific embodiment of the invention, in the first step, the calcium hydroxide and the fumed silica are uniformly mixed according to the calcium-silicon molar ratio of 0.83: 1; under the condition that the calcium-silicon ratio is 0.83:1, the two raw materials of calcium hydroxide and fumed silica can fully react to generate tobermorite, the utilization rate of the raw materials is high, when the calcium-silicon ratio is low, for example 0.7, part of the raw materials can not participate in the reaction, and when the calcium-silicon ratio is 1, a small amount of xonotlite can be generated, so the optimal calcium-silicon ratio is 0.83: 1.
In the specific embodiment of the invention, in the first step, the deionized water is added according to the liquid-solid ratio of 30 mL/g; the size of the liquid-solid ratio directly influences the dissolution condition of the calcium hydroxide and the fumed silica, namely indirectly influences the reaction condition between the calcium hydroxide and the fumed silica, so that the shape of the finally generated tobermorite product is influenced, when the liquid-solid ratio is small, for example, 10mL/g, the tobermorite whisker is wide and presents a sheet or even block shape, the liquid-solid ratio is further increased to 20mL/g, the width of the whisker is narrowed, the length of the whisker is lengthened, and under the liquid-solid ratio of 30mL/g, the obtained tobermorite has the best shape.
In the embodiment of the invention, in the second step, the stirring speed is 100-200 r/min. In the microwave hydrothermal process, a reaction system needs to be stirred, and if the reaction system is not stirred or the stirring speed is low, the reaction system is not beneficial to dissolving reactants, so that the reaction is insufficient, and better tobermorite whiskers cannot be formed; the stirring speed is over-high to inhibit the perfect growth of the whisker, so the stirring speed of the invention is limited to 100-200 r/min.
In the second step, the temperature is raised to 200-220 ℃ by microwave heating, and the reaction is uniformly stirred for 2 hours; in the range of 180 ℃ and 220 ℃, the aspect ratio of the Tolbecco mullite whisker tends to increase with the increase of the reaction temperature of microwave heating.
In a specific embodiment of the present invention, in the step two, the post-processing specifically includes: and cooling the reaction system to room temperature, filtering to obtain solid precipitate, washing the obtained solid precipitate, and drying in vacuum at the temperature of 40-60 ℃ to obtain the tobermorite whisker.
In conclusion, the method prepares the solution of calcium hydroxide and white carbon black according to a certain calcium-silicon ratio, liquid-solid ratio, reaction time and reaction temperature, places the solution in a microwave reaction kettle for dynamic hydrothermal synthesis, and filters and dries the obtained sample after the reaction is finished to obtain the tobermorite whisker. The tobermorite whisker prepared by the method has uniform appearance, the synthesis method is simple and easy to operate, the energy consumption is low, the synthesis efficiency is high, in addition, the method only needs to filter, wash and dry the product in the post-treatment process, and the development trend of environment-friendly production is met.
The calcium-silicon ratios in the following examples are all molar ratios.
Example 1
The tobermorite whisker is synthesized by the following steps: uniformly mixing calcium hydroxide and fumed silica according to the calcium-silicon ratio of 0.83, adding deionized water according to the liquid-solid ratio of 30mL/g to obtain mixed slurry, placing the mixed slurry into a microwave hydrothermal synthesis reaction kettle, heating to 200 ℃, uniformly stirring for reaction for 2 hours at the stirring speed of 150r/min, cooling the obtained reaction mixed solution to room temperature, filtering, washing, drying in vacuum at 60 ℃ to obtain a target product, and carrying out SEM detection on the target product, wherein the SEM picture is shown in figure 1, and the tobermorite whiskers are observed, the width is 200-300nm, and the length is 2-5 mu m.
Example 2
The tobermorite whisker is synthesized by the following steps: uniformly mixing calcium hydroxide and fumed silica according to the calcium-silicon ratio of 0.83, adding deionized water according to the liquid-solid ratio of 30mL/g to obtain mixed slurry, placing the mixed slurry into a microwave hydrothermal synthesis reaction kettle, heating to 220 ℃, uniformly stirring for reaction for 2 hours at the stirring speed of 150r/min, cooling the obtained reaction mixed solution to room temperature, filtering, washing, and drying in vacuum at 60 ℃ to obtain a target product, wherein the whisker morphology of the product is the same as that of the product in example 1.
Example 3
The tobermorite whisker is synthesized by the following steps: uniformly mixing calcium hydroxide and fumed silica according to the calcium-silicon ratio of 0.83, adding deionized water according to the liquid-solid ratio of 30mL/g to obtain mixed slurry, placing the mixed slurry into a microwave hydrothermal synthesis reaction kettle, heating to 220 ℃, uniformly stirring for reaction for 4 hours at the stirring speed of 150r/min, cooling the obtained reaction mixed solution to room temperature, filtering, washing, drying in vacuum at 60 ℃ to obtain a target product, and carrying out SEM detection on the target product, wherein the SEM picture is shown in figure 2, and the tobermorite whiskers are observed, the width is 100-300nm, and the length is 1-4 mu m.
Example 4
The tobermorite whisker is synthesized by the following steps: uniformly mixing calcium hydroxide and fumed silica according to a calcium-silicon ratio of 0.83, adding deionized water according to a liquid-solid ratio of 30mL/g to obtain a mixed slurry, placing the mixed slurry into a microwave hydrothermal synthesis reaction kettle, heating to 220 ℃, uniformly stirring for reaction for 6 hours at a stirring speed of 150r/min, cooling the obtained reaction mixed solution to room temperature, filtering, washing, drying in vacuum at 60 ℃ to obtain a target product, and carrying out SEM detection on the target product, wherein an SEM picture is shown in figure 3 and shows that the tobermorite whisker has a hardening phenomenon.
Example 5
The tobermorite whisker is synthesized by the following steps: uniformly mixing calcium hydroxide and fumed silica according to the calcium-silicon ratio of 0.83, adding deionized water according to the liquid-solid ratio of 30mL/g to obtain mixed slurry, placing the mixed slurry into a microwave hydrothermal synthesis reaction kettle, heating to 180 ℃, uniformly stirring for reaction for 2 hours at the stirring speed of 120r/min, cooling the obtained reaction mixed solution to room temperature, filtering, washing, and drying in vacuum at 60 ℃ to obtain the target product.
Example 6
The tobermorite whisker is synthesized by the following steps: uniformly mixing calcium hydroxide and fumed silica according to the calcium-silicon ratio of 0.83, adding deionized water according to the liquid-solid ratio of 10mL/g to obtain mixed slurry, putting the mixed slurry into a microwave hydrothermal synthesis reaction kettle, heating the stirring speed to 220 ℃, uniformly stirring for reaction for 2 hours, wherein the stirring speed is 180r/min, cooling the obtained reaction mixed solution to room temperature, filtering, washing, and drying in vacuum at 60 ℃ to obtain a target product.
Example 7
The tobermorite whisker is synthesized by the following steps: uniformly mixing calcium hydroxide and fumed silica according to the calcium-silicon ratio of 0.83, adding deionized water according to the liquid-solid ratio of 20mL/g to obtain mixed slurry, putting the mixed slurry into a microwave hydrothermal synthesis reaction kettle, heating to 220 ℃, uniformly stirring for reaction for 2 hours at the stirring speed of 180r/min, cooling the obtained reaction mixed solution to room temperature, filtering, washing, and drying in vacuum at 60 ℃ to obtain the target product.
Example 8
The tobermorite whisker is synthesized by the following steps: uniformly mixing calcium hydroxide and fumed silica according to the calcium-silicon ratio of 0.7, adding deionized water according to the liquid-solid ratio of 30mL/g to obtain mixed slurry, placing the mixed slurry into a microwave hydrothermal synthesis reaction kettle, heating to 220 ℃, uniformly stirring for reaction for 2 hours at the stirring speed of 150r/min, cooling the obtained reaction mixed solution to room temperature, filtering, washing, and drying in vacuum at 60 ℃ to obtain a target product.
Example 9
The tobermorite whisker is synthesized by the following steps: uniformly mixing calcium hydroxide and fumed silica according to a calcium-silicon ratio of 1, adding deionized water according to a liquid-solid ratio of 30mL/g to obtain a mixed slurry, putting the mixed slurry into a microwave hydrothermal synthesis reaction kettle, heating to 220 ℃, uniformly stirring for reaction for 2 hours at a stirring speed of 150r/min, cooling the obtained reaction mixed solution to room temperature, filtering, washing, and vacuum-drying at 60 ℃ to obtain a target product.
According to the experimental results of the above embodiment, the tobermorite whisker with better morphology can be obtained by reacting at the calcium-silicon ratio of 0.83, the liquid-solid ratio of 30mL/g and the reaction temperature of 200-220 ℃ for 2h, the width of the whisker is 200-300nm, the length of the whisker is 2-5 microns, the reaction time is short, and a large amount of energy consumption can be saved.
The above description is only exemplary of the invention and should not be taken as limiting the invention, as any modification, equivalent replacement, or improvement made within the spirit and principle of the invention is intended to be covered by the appended claims.

Claims (9)

1. The tobermorite whisker is characterized in that: the tobermorite whisker is a flaky whisker, the width of the whisker is 100-300nm, and the length of the whisker is 1-5 mu m.
2. The tobermorite whisker according to claim 1, characterized in that: the width of the whisker is 200-300nm, and the length is 2-5 μm.
3. A microwave hydrothermal synthesis method of tobermorite whiskers is characterized by comprising the following steps:
the method comprises the following steps: uniformly mixing calcium hydroxide and fumed silica according to the molar ratio of calcium to silicon of 0.7-1:1 to form a solid mixture, then adding deionized water into the solid mixture according to the liquid-solid ratio of 10-30mL/g, and uniformly mixing to obtain mixed slurry;
step two: and (3) placing the mixed slurry obtained in the step one into a microwave reaction kettle, heating to 180 ℃ and 220 ℃ by microwave, uniformly stirring for reaction for 2-8h, and performing post-treatment to obtain the catalyst.
4. The microwave hydrothermal synthesis method of tobermorite whiskers according to claim 3, characterized in that in the first step, the calcium hydroxide and the fumed silica are uniformly mixed according to a calcium-silicon molar ratio of 0.83: 1.
5. The microwave hydrothermal synthesis method of tobermorite whiskers according to claim 3, wherein in the first step, the deionized water is added at a liquid-solid ratio of 30 mL/g.
6. The microwave hydrothermal synthesis method of tobermorite whiskers as claimed in claim 3, wherein in the second step, the stirring rate is 100-200 r/min.
7. The microwave hydrothermal synthesis method of tobermorite whiskers as claimed in claim 3, wherein in the second step, the temperature is raised to 200-220 ℃ by microwave heating, and the reaction is uniformly stirred for 2 h.
8. The microwave hydrothermal synthesis method of tobermorite whiskers according to claim 3, characterized in that in step two, the post-treatment is specifically performed by: and cooling the reaction system to room temperature, filtering to obtain solid precipitate, washing the obtained solid precipitate, and drying in vacuum at the temperature of 40-60 ℃ to obtain the tobermorite whisker.
9. The microwave hydrothermal synthesis method of tobermorite whiskers according to any one of claims 3 to 8, wherein the tobermorite whiskers are the tobermorite whiskers in claim 1 or 2.
CN202011075223.6A 2020-10-09 2020-10-09 Tobermorite whisker and microwave hydrothermal synthesis method thereof Pending CN112226817A (en)

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CN114425549A (en) * 2021-12-16 2022-05-03 中南大学 Method for performing microwave hydrothermal detoxification on waste incineration fly ash and synchronously synthesizing tobermorite

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CN102674380A (en) * 2012-05-25 2012-09-19 中南大学 Method for synthesizing tobermorite whiskers by sodium silicate
CN108315810A (en) * 2018-02-24 2018-07-24 陕西大秦钾业有限公司 A method of using kaliophilite as Material synthesis mullite crystal whisker

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114425549A (en) * 2021-12-16 2022-05-03 中南大学 Method for performing microwave hydrothermal detoxification on waste incineration fly ash and synchronously synthesizing tobermorite
CN114425549B (en) * 2021-12-16 2023-10-13 中南大学 Method for microwave hydrothermal detoxification and synchronous synthesis of tobermorite by using waste incineration fly ash

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