CN110282633A - A kind of method of modifying of nano oxidized silicon materials - Google Patents
A kind of method of modifying of nano oxidized silicon materials Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 38
- 239000002210 silicon-based material Substances 0.000 title claims abstract description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 105
- 229910052814 silicon oxide Inorganic materials 0.000 claims abstract description 72
- 239000005543 nano-size silicon particle Substances 0.000 claims abstract description 71
- 239000002002 slurry Substances 0.000 claims abstract description 37
- 239000006087 Silane Coupling Agent Substances 0.000 claims abstract description 20
- 239000000377 silicon dioxide Substances 0.000 claims abstract description 16
- 238000006243 chemical reaction Methods 0.000 claims abstract description 14
- 239000002159 nanocrystal Substances 0.000 claims abstract description 14
- 239000000413 hydrolysate Substances 0.000 claims abstract description 12
- 239000007787 solid Substances 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims abstract description 8
- 230000001376 precipitating effect Effects 0.000 claims abstract description 7
- 239000000654 additive Substances 0.000 claims abstract description 6
- 230000000996 additive effect Effects 0.000 claims abstract description 6
- 239000000284 extract Substances 0.000 claims abstract description 6
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 4
- 238000001035 drying Methods 0.000 claims description 24
- 239000000203 mixture Substances 0.000 claims description 9
- 150000007522 mineralic acids Chemical class 0.000 claims description 7
- 150000007524 organic acids Chemical group 0.000 claims description 7
- 150000007530 organic bases Chemical class 0.000 claims description 7
- 239000000047 product Substances 0.000 claims description 7
- 150000007529 inorganic bases Chemical class 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 4
- 230000003196 chaotropic effect Effects 0.000 claims description 2
- 239000007822 coupling agent Substances 0.000 claims description 2
- BLRPTPMANUNPDV-UHFFFAOYSA-N Silane Chemical compound [SiH4] BLRPTPMANUNPDV-UHFFFAOYSA-N 0.000 claims 2
- 229910000077 silane Inorganic materials 0.000 claims 2
- 239000000463 material Substances 0.000 abstract description 11
- 239000007791 liquid phase Substances 0.000 abstract description 9
- 230000004048 modification Effects 0.000 abstract description 7
- 238000012986 modification Methods 0.000 abstract description 7
- 239000003153 chemical reaction reagent Substances 0.000 abstract description 5
- 239000002086 nanomaterial Substances 0.000 abstract description 4
- 230000008569 process Effects 0.000 abstract description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 238000009826 distribution Methods 0.000 description 6
- 238000002360 preparation method Methods 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- 239000002245 particle Substances 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 238000005054 agglomeration Methods 0.000 description 4
- 230000002776 aggregation Effects 0.000 description 4
- 239000000376 reactant Substances 0.000 description 4
- 241000209094 Oryza Species 0.000 description 3
- 235000007164 Oryza sativa Nutrition 0.000 description 3
- 108010009736 Protein Hydrolysates Proteins 0.000 description 3
- 239000002585 base Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 3
- YQGOWXYZDLJBFL-UHFFFAOYSA-N dimethoxysilane Chemical compound CO[SiH2]OC YQGOWXYZDLJBFL-UHFFFAOYSA-N 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 239000011858 nanopowder Substances 0.000 description 3
- 235000009566 rice Nutrition 0.000 description 3
- 239000005060 rubber Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000004094 surface-active agent Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- ZMXDDKWLCZADIW-UHFFFAOYSA-N Vilsmeier-Haack reagent Natural products CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 description 2
- 239000003093 cationic surfactant Substances 0.000 description 2
- 235000013339 cereals Nutrition 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000002209 hydrophobic effect Effects 0.000 description 2
- 239000012071 phase Substances 0.000 description 2
- 239000011856 silicon-based particle Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000004593 Epoxy Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 238000012279 drainage procedure Methods 0.000 description 1
- 238000004945 emulsification Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 235000013312 flour Nutrition 0.000 description 1
- 125000002887 hydroxy group Chemical group [H]O* 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 230000003014 reinforcing effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000007665 sagging Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
- 238000009210 therapy by ultrasound Methods 0.000 description 1
- 230000008719 thickening Effects 0.000 description 1
- 239000012808 vapor phase Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B33/00—Silicon; Compounds thereof
- C01B33/113—Silicon oxides; Hydrates thereof
- C01B33/12—Silica; Hydrates thereof, e.g. lepidoic silicic acid
- C01B33/18—Preparation of finely divided silica neither in sol nor in gel form; After-treatment thereof
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01P—INDEXING SCHEME RELATING TO STRUCTURAL AND PHYSICAL ASPECTS OF SOLID INORGANIC COMPOUNDS
- C01P2006/00—Physical properties of inorganic compounds
- C01P2006/80—Compositional purity
- C01P2006/82—Compositional purity water content
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Silicon Compounds (AREA)
Abstract
The present invention relates to nano silicon oxide technical fields, and disclose a kind of method of modifying of nano oxidized silicon materials, the following steps are included: 1) recycle regulator by its pH value adjustment to 7-12 by nano silicon oxide pulp concentration to solid content 5-60%wt, temperature be adjusted to 5-100 degree；2) silane coupling agent or its hydrolysate are added slowly in nano silicon oxide slurry, additive amount is nano silicon oxide slurry 0.5-20%, needs ceaselessly to stir during addition, keeps hybrid reaction uniform；3) it by above-mentioned slurry reaction object in 5-100 degree, is aged 1-24 hours, makes nano silicon oxide precipitating and liquid layered, separate liquid phase and simultaneously extract precipitated nanocrystals silica.The method of modifying of the nano oxidized silicon materials, without increasing process equipment, simple process, without organic reagent as modification medium, original efficiency is improved, mobility dispersibility is fabulous, and modifying agent is pollution-free to nano silicon oxide, it improves nano material characteristic and uses field, improve the compatibility with other materials.
Description
Technical field
The present invention relates to nano silicon oxide technical field, specially a kind of method of modifying of nano oxidized silicon materials.
Background technique
Nano silicon oxide is commonly called as gas-phase silica, and product is synthetic material's amorphous white mobility powder, has each
Kind of specific surface area and the stringent size distribution of volume, are a kind of unformed white powders, nontoxic, tasteless and pollution-free, surface is deposited
In hydroxyl and absorption water, for primary partial size between 7~80nm, specific surface area is generally higher than 100m2/g, since its nanometer is imitated
It answers, shows the properties such as brilliant reinforcement, thickening, thixotroping, insulation, delustring and resist sagging in the material, with granularity is small, compares table
The features such as area is big, purity is high is low with density and with good stability, reinforcing, thixotropy and good optical
Can, it is widely used in the fields such as ceramics, rubber, plastics, pigment and electronic component.
The preparation method of nano silicon oxide mainly includes vapor phase method and liquid phase method, and wherein liquid phase method mainly has sol-gel
The nano silicon oxide of method, the precipitation method and emulsion method etc., liquid phase method preparation is created on liquid phase, when being dried to powder body material, nano powder
Body material separated from solvent and drying process in, due to the capillary action of drainage procedure cause nano silicon oxide be easy group
Poly-, agglomeration, the nano-powder after reunion will lose its excellent characteristics, and the agglomeration traits of nano-powder receive by serious hinder
The preparation of the application of rice flour body and corresponding nano material.
Auxiliary law, which is centrifuged, according to 104530647 B of Chinese patent CN prepares Epoxy/nano silica composite material
Method, the patent are by handling nano silicon oxide under strong stirring and ultrasonic wave collective effect with the ethanol solution of coupling agent
Particle obtains modified nano oxidized silicon particle, then modified nano oxidized silicon particle is added to the ring having been warmed up
In oxygen resin, centrifugal treating is carried out after ultrasonic treatment, is poured into warmed-up mold, is taking out after last vacuum defoamation processing
It in the case where vacuum, is heated to being fully cured, and is received also according to 101279240 B of Chinese patent CN is organically-modified
The preparation method of rice silicon oxide adsorbing material, by the way that cationic surfactant is dissolved in the water, then by nano silicon oxide
It pours into surfactant solution, the mass percent of surfactant solution compositions comprising cationic surfactants is 1%~20%,
Nano silicon oxide and surfactant solution mass ratio are 1: 5~1: 100, and said mixture is stirred under 20~80 DEG C of constant temperature
Mix 2~for 24 hours, filtering is washed with distilled water 2 times, cross filter solid and dried at 50~90 DEG C, then activate at 105 DEG C 30min~
5 hours, dry activation products were ground, sieve with 100 mesh sieve, and organic modified nano silicon oxide adsorbing material, these mode works are made
Skill is cumbersome, complicated for operation, needs organic reagent as modification medium, so propose a kind of method of modifying of nano oxidized silicon materials
To solve the above problems.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of method of modifying of nano oxidized silicon materials, have and be not necessarily to
Increasing technique and equipment, the advantages that without organic reagent as modification medium, it is cumbersome to solve technique, and it is complicated for operation, it needs
The problem of machine reagent is as modification medium.
(2) technical solution
Above-mentioned without increasing technique and equipment to realize, the purpose without organic reagent as modification medium, the present invention mentions
For following technical solution: a kind of method of modifying of nano oxidized silicon materials, comprising the following steps:
1) by nano silicon oxide pulp concentration to solid content 5-60%wt, recycle regulator by its pH value adjustment to 7-
12, temperature is adjusted to 5-100 degree.
2) silane coupling agent or its hydrolysate are added slowly in nano silicon oxide slurry, additive amount is nano oxidized
Silicon slurry 0.5-20% needs ceaselessly to stir during addition, keeps hybrid reaction uniform.
3) it by above-mentioned slurry reaction object in 5-100 degree, is aged 1-24 hours, makes nano silicon oxide precipitating and liquid point
Layer separates liquid phase and extracts precipitated nanocrystals silica.
4) precipitated nanocrystals silica is placed in drying box, the temperature of drying box is adjusted to 50-150 degree, and
Dry 2-24 hour, by dry 99.5% or more the solid content of nano silicon oxide, it is dry after nano silicon oxide soilless sticking, disperse with
And good fluidity, to obtain finished product.
Preferably, the regulator is specially organic acid, inorganic acid, organic base or inorganic base composition.
Preferably, the silane coupling agent be dimethyldimethoxysil,ne, KH550, KH560, KH570 or they
Hydrolysate.
Preferably, described when being added to regulator in nano silicon oxide slurry, nano silicon oxide slurry need to be carried out even
Speed stirring.
Preferably, it is described nano silicon oxide slurry after the completion of mixing with silane coupling agent or its hydrolysate is placed on it is dry
In dry case, drying box is confined space.
(3) beneficial effect
Compared with prior art, the present invention provides a kind of method of modifying of nano oxidized silicon materials, have following beneficial
Effect:
1, the method for modifying of the nano oxidized silicon materials, by being modifying agent using silane coupling agent, silane coupling agent is
Dimethyldimethoxysil,ne can extend the storage time of rubber compound, by sol-gel technology in nano oxidized silicon face shape
At one layer of hydrophobic membrane, liquid phase nano silicon oxide is made to avoid the reunion between particle when being separated by solid-liquid separation, it is nano oxidized after drying
Silicon maintains its initial size, and the bulky grain of no secondary agglomeration body occurs, improve nano silicon oxide particle diameter distribution uniformly, dispersibility and
Mobility, modified in nano silicon oxide preparation process, without increasing technique and equipment, simple process optimizes original technique, mentions
Plateau is efficient, and the characteristic of nano material can be improved in modified nano silicon oxide in use, promotes it using field, improve its with
The compatibility of other materials.
2, the method for modifying of the nano oxidized silicon materials is specially organic acid, inorganic acid, organic base or nothing by regulator
Machine alkali composition, facilitates and is added and adjusts according to the actual pH value of nano silicon oxide slurry, make the PH of nano silicon oxide slurry
Nano silicon oxide slurry after the completion of mixing with silane coupling agent or its hydrolysate is placed in drying box by value control in 7-12
It is heated, is maintained at slurry reaction object in 5-100 degree, and be aged 1-24 hours, to obtain precipitated nanocrystals oxidation
Silicon, drying box be it is closed, can effectively prevent sundries and enter in reactant, to influence the quality of reactant.
Detailed description of the invention
Fig. 1 is novel nano silica pulp concentration distribution map of the present invention；
Fig. 2 is that the novel precipitating nano silicon oxide of present invention powder granularity after being dried is distributed.
Specific embodiment
Below in conjunction with the embodiment of the present invention, technical solution in the embodiment of the present invention is clearly and completely retouched
It states, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the present invention
In embodiment, every other implementation obtained by those of ordinary skill in the art without making creative efforts
Example, shall fall within the protection scope of the present invention.
A kind of embodiment one: method of modifying of nano oxidized silicon materials, comprising the following steps:
1) by nano silicon oxide pulp concentration to solid content 5wt, recycle regulator by its pH value adjustment to 7, by temperature
5 degree are adjusted to, regulator is specially organic acid, inorganic acid, organic base or inorganic base composition, regulator is added to nano oxidized
When in silicon slurry, nano silicon oxide slurry need at the uniform velocity be stirred；
2) silane coupling agent or its hydrolysate are added slowly in nano silicon oxide slurry, silane coupling agent is diformazan
Base dimethoxysilane, KH550, KH560, KH570 or their hydrolysate, silane coupling agent additive amount are nano silicon oxide slurry
Material 0.5%, needs ceaselessly to stir during addition, keeps hybrid reaction uniform；
3) it by above-mentioned slurry reaction object in 5 degree, is aged 1 hour, makes nano silicon oxide precipitating and liquid layered, separating liquid
Mutually and extract precipitated nanocrystals silica；
4) precipitated nanocrystals silica is placed in drying box, the temperature of drying box is adjusted under 50 degree, and dry 2
Nano silicon oxide is dried 99.5% or more solid content by hour, the nano silicon oxide soilless sticking after drying, dispersion and mobility
It is good, to obtain finished product.
A kind of embodiment two: method of modifying of nano oxidized silicon materials, comprising the following steps:
1) by nano silicon oxide pulp concentration to solid content 5-60%wt, recycle regulator by its pH value adjustment to 12,
Temperature is adjusted to 100 degree, regulator is specially organic acid, inorganic acid, organic base or inorganic base composition, and regulator is added to
When in nano silicon oxide slurry, nano silicon oxide slurry need at the uniform velocity be stirred；
2) silane coupling agent or its hydrolysate are added slowly in nano silicon oxide slurry, silane coupling agent is diformazan
Base dimethoxysilane, KH550, KH560, KH570 or their hydrolysate, silane coupling agent additive amount are nano silicon oxide slurry
Material 20%, needs ceaselessly to stir during addition, keeps hybrid reaction uniform；
3) it by above-mentioned slurry reaction object in 100 degree, is aged 24 hours, makes nano silicon oxide precipitating and liquid layered, point
Chaotropic phase simultaneously extracts precipitated nanocrystals silica；
4) precipitated nanocrystals silica is placed in drying box, the temperature of drying box is adjusted to 150 degree, and dry 24
Nano silicon oxide is dried 99.5% or more solid content by hour, the nano silicon oxide soilless sticking after drying, dispersion and mobility
It is good, to obtain finished product.
A kind of embodiment three: method of modifying of nano oxidized silicon materials, comprising the following steps:
1) by nano silicon oxide pulp concentration to solid content 35%wt, recycle regulator by its pH value adjustment to 10, it will
Temperature is adjusted to 55 degree, and regulator is specially organic acid, inorganic acid, organic base or inorganic base composition, and regulator is added to and is received
When in rice silica slurry, nano silicon oxide slurry need at the uniform velocity be stirred；
2) silane coupling agent or its hydrolysate are added slowly in nano silicon oxide slurry, silane coupling agent is diformazan
Base dimethoxysilane, KH550, KH560, KH570 or their hydrolysate, silane coupling agent additive amount are nano silicon oxide slurry
Material 10%, needs ceaselessly to stir during addition, keeps hybrid reaction uniform；
3) it by above-mentioned slurry reaction object in 55 degree, is aged 12 hours, makes nano silicon oxide precipitating and liquid layered, separation
Liquid phase simultaneously extracts precipitated nanocrystals silica；
4) precipitated nanocrystals silica is placed in drying box, the temperature of drying box is adjusted to 100 degree, and dry 13
Nano silicon oxide is dried 99.5% or more solid content by hour, the nano silicon oxide soilless sticking after drying, dispersion and mobility
It is good, to obtain finished product.
Experimental example: nano silicon oxide pulp concentration distribution situation such as Fig. 1；Precipitated nanocrystals silica powder after being dried
Size distribution such as Fig. 2.
The beneficial effects of the present invention are: silane coupling agent is dimethylformamide dimethyl by being modifying agent using silane coupling agent
Oxysilane can extend the storage time of rubber compound, hydrophobic in one layer of nano oxidized silicon face formation by sol-gel technology
Film, makes liquid phase nano silicon oxide avoid the reunion between particle when being separated by solid-liquid separation, and the nano silicon oxide after drying maintains its original
The bulky grain of beginning partial size, no secondary agglomeration body occurs, and improves uniform nano silicon oxide particle diameter distribution, dispersibility and mobility,
Modified in nano silicon oxide preparation process, without increasing technique and equipment, simple process optimizes original technique, improves original effect
The characteristic of nano material can be improved in rate, modified nano silicon oxide in use, promotes it using field, improves itself and other materials
Compatibility, be specially that organic acid, inorganic acid, organic base or inorganic base form by regulator, facilitate according to nano silicon oxide
The actual pH value of slurry is added and adjusts, and controls the pH value of nano silicon oxide slurry in 7-12, will be with silane coupling agent
Or the nano silicon oxide slurry after the completion of the mixing of its hydrolysate is placed in drying box and is heated, and is maintained at slurry reaction object
In 5-100 degree, and be aged 1-24 hours, to obtain precipitated nanocrystals silica, drying box be it is closed, can be effective
Prevent sundries from entering in reactant, to influence the quality of reactant.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (5)
1. a kind of method of modifying of nano oxidized silicon materials, which comprises the following steps:
1) by nano silicon oxide pulp concentration to solid content 5-60%wt, recycle regulator by its pH value adjustment to 7-12, it will
Temperature is adjusted to 5-100 degree；
2) silane coupling agent or its hydrolysate are added slowly in nano silicon oxide slurry, additive amount is nano silicon oxide slurry
Expect 0.5-20%, needs ceaselessly to stir during addition, keep hybrid reaction uniform；
3) it by above-mentioned slurry reaction object in 5-100 degree, is aged 1-24 hours, makes nano silicon oxide precipitating and liquid layered, point
Chaotropic phase simultaneously extracts precipitated nanocrystals silica；
4) precipitated nanocrystals silica is placed in drying box, the temperature of drying box is adjusted to 50-150 degree, and is dry
2-24 hours, nano silicon oxide is dried into 99.5% or more solid content, the nano silicon oxide soilless sticking after drying disperses and flows
Dynamic property is good, to obtain finished product.
2. a kind of method of modifying of nano oxidized silicon materials according to claim 1, it is characterised in that: the regulator tool
Body is organic acid, inorganic acid, organic base or inorganic base composition.
3. a kind of method of modifying of nano oxidized silicon materials according to claim 1, it is characterised in that: described silane coupled
Agent is dimethyldimethoxysil,ne, KH550, KH560, KH570 or their hydrolysate.
4. a kind of method of modifying of nano oxidized silicon materials according to claim 1, it is characterised in that: described by regulator
When being added in nano silicon oxide slurry, nano silicon oxide slurry need at the uniform velocity be stirred.
5. a kind of method of modifying of nano oxidized silicon materials according to claim 1, it is characterised in that: it is described will be with silane
Nano silicon oxide slurry after the completion of coupling agent or the mixing of its hydrolysate is placed in drying box, and drying box is confined space.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111732108A (en) * | 2020-06-12 | 2020-10-02 | 安徽壹石通材料科技股份有限公司 | Porous amorphous silicon dioxide powder and preparation method and application thereof |
| CN112194144A (en) * | 2020-09-11 | 2021-01-08 | 江苏辉迈粉体科技有限公司 | Preparation method of spherical silicon micropowder |
| CN113732241A (en) * | 2021-08-25 | 2021-12-03 | 湖北工业大学 | Hydrophilic nano-silica modified inorganic phosphate binder and application thereof |
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