CN112321314A - Powder material and preparation method and application thereof - Google Patents
Powder material and preparation method and application thereof Download PDFInfo
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- CN112321314A CN112321314A CN202011292198.7A CN202011292198A CN112321314A CN 112321314 A CN112321314 A CN 112321314A CN 202011292198 A CN202011292198 A CN 202011292198A CN 112321314 A CN112321314 A CN 112321314A
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Abstract
The invention belongs to the technical field of materials, and particularly relates to a powder material and a preparation method and application thereof. In the powder material, the feldspar is beneficial to reducing the subsequent treatment temperature of the obtained powder material, and the problem of overhigh sintering temperature is avoided; the crystal whisker has higher mechanical property and thermal property, and can improve the toughness of the obtained powder material, so that the powder material has excellent bending resistance; the organic acid can activate quartz and feldspar, so that the flowability of the obtained powder material is improved, and the affinity between the powder material and a curing agent can be increased. The powder material provided by the invention can meet the requirements of a 3D ink-jet printing technology on printing materials, can improve the curing effect of printed products, is beneficial to reducing the subsequent processing temperature of the printed products, and has a good application prospect.
Description
Technical Field
The invention belongs to the technical field of materials, and particularly relates to a powder material and a preparation method and application thereof.
Background
The 3D printing technique, one of the rapid prototyping techniques, is a technique for constructing an object by printing layer by layer using an adhesive material such as powdered silicate mineral, metal or plastic, based on a digital model file. Since the 3D printing technology has high requirements for powder materials, quartz-based powder has the defects of poor flowability, poor affinity for curing agents, poor multiplexing, high sintering temperature and the like, and is not favored in the field of precise 3D printing.
Disclosure of Invention
The invention aims to provide a powder material and a preparation method and application thereof, and aims to solve the technical problems of poor flowability, poor affinity with a curing agent, poor multiplexing, high sintering temperature and the like of the existing 3D printing powder mainly made of quartz.
In order to achieve the above object, in one aspect, the present invention provides a powder material, which comprises the following components in parts by weight:
in the powder material provided by the invention, on one hand, the quartz, the feldspar and the whiskers are mixed, and the main component of the quartz is silicon dioxide, so that the powder material has the advantages of higher hardness, good insulating property, low expansion coefficient, fire resistance, corrosion resistance and the like, and is favorable for improving the stability of the obtained powder material; the feldspar is beneficial to reducing the subsequent treatment temperature of the obtained powder material, and the problem of overhigh sintering temperature is avoided; the crystal whisker has higher mechanical property and thermal property, and can improve the toughness of the obtained powder material, so that the powder material has excellent bending resistance. On the other hand, the feldspar surface can be subjected to acid washing modification by adding the organic acid, so that an activating effect is achieved, edges and corners of particles with high reaction activity are eroded and passivated, the surface roughness and the sphericity of the obtained powder material are increased, the flowability of the obtained powder material is improved, the affinity between the powder material and a curing agent can be increased, and the application prospect is good.
As a preferable technical scheme of the powder material, the particle size of the quartz is 50-150 μm.
As a preferable technical scheme of the powder material, the quartz is beta-quartz.
As a preferable technical scheme of the powder material, the particle size of the feldspar is 60-120 μm.
In a preferable embodiment of the powder material of the present invention, the feldspar is at least one selected from albite, potassium feldspar and alkali feldspar.
As a preferable technical scheme of the powder material, the diameter of the whisker is 0.02-0.2 μm, and the length of the whisker is 1-10 μm.
As a preferable technical scheme of the powder material, the whiskers are selected from mullite (3 Al)2O3·2SiO2) Whisker and alumina (Al)2O3) At least one of whiskers, silicon carbide (SiC) whiskers, aluminum nitride (AlN) whiskers.
As a preferable technical scheme of the powder material, the organic acid is selected from tartaric acid (C)4H6O6) Malic acid (C)4H6O5) Succinic acid (C)4H6O4) At least one of (1).
In another aspect of the present invention, a method for preparing a powder material is provided, which comprises the following steps:
mixing quartz, feldspar, crystal whiskers, organic acid and water to obtain a mixture;
and carrying out solid-liquid separation and drying treatment on the mixture to obtain a powder material.
In the preparation method of the powder material provided by the invention, in the process of mixing quartz, feldspar and whisker with organic acid and water, the organic acid performs acid cleaning modification on the surface of the feldspar to play a role in activating, so that edges and corners of feldspar particles are eroded and passivated, the surface roughness and sphericity of the obtained powder material are increased, the flowability of the obtained powder material is improved, and the affinity between the powder material and a curing agent can also be increased. The preparation method provided by the invention has the advantages of simple and controllable process, low cost and suitability for large-scale production, and the prepared powder material has good fluidity, lower subsequent treatment temperature, excellent fracture resistance and good application prospect.
As a preferable technical scheme of the preparation method of the powder material, the particle size of the quartz is 50-150 μm.
As a preferable technical scheme of the preparation method of the powder material, the particle size of the feldspar is 60-120 mu m.
As a preferable technical scheme of the preparation method of the powder material, the diameter of the whisker is 0.02-0.2 μm, and the length of the whisker is 1-10 μm.
As a preferable technical scheme of the preparation method of the powder material, the mixing treatment method is ultrasonic dispersion for 15-30 min under the stirring condition.
As a preferred technical scheme of the preparation method of the powder material, the temperature of the drying treatment is 60-85 ℃, and the time of the drying treatment is 10-24 h.
In a final aspect of the invention, an application of the powder material of the invention or the powder material prepared by the preparation method of the powder material of the invention in 3D printing is provided.
The powder material provided by the invention has the advantages of good fluidity, high affinity with a curing agent, good folding resistance and the like, and when the powder material is used as a material for 3D printing, the requirements of a 3D ink-jet printing technology on printing materials are met, the curing effect of printed products can be improved, and the subsequent treatment temperature of the printed products is favorably reduced.
Drawings
FIG. 1 is an optical microscope photograph of albite and quartz that have been sieved and not acid-washed in the examples of the present invention;
FIG. 2 is a surface micro-topography diagram of albite before being activated by organic acid in example 1 of the present invention;
FIG. 3 is a surface micro-topography of albite after being activated by organic acid in example 1 of the present invention;
FIG. 4 is an electron micrograph of mullite whiskers of example 1 of the present invention.
FIG. 5 is an electron micrograph of the alkali feldspar of example 2 of the present invention before (a) and after (b) treatment.
FIG. 6 is an electron micrograph of a silicon carbide whisker in example 2 of the present invention.
FIG. 7 is an electron micrograph of potassium feldspar after treatment (a) and after treatment (b) in example 3 of the present invention.
FIG. 8 is an electron micrograph of alumina whiskers of example 3 of the present invention.
Detailed Description
In order to make the objects, technical solutions and technical effects of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are clearly and completely described, and the embodiments described below are a part of the embodiments of the present invention, but not all of the embodiments. All other embodiments obtained by a person of ordinary skill in the art without any inventive step in connection with the embodiments of the present invention shall fall within the scope of protection of the present invention. Those whose specific conditions are not specified in the examples are carried out according to conventional conditions or conditions recommended by the manufacturer; the reagents or instruments used are not indicated by the manufacturer, and are all conventional products available commercially.
In the description of the present invention, the term "and/or" describing an association relationship of associated objects means that there may be three relationships, for example, a and/or B, may mean: a is present alone, A and B are present simultaneously, and B is present alone. Wherein A and B can be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship.
In the description of the present invention, "at least one" means one or more, "a plurality" means two or more. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, "at least one (a), b, or c", or "at least one (a), b, and c", may each represent: a. b, c, a-b (i.e. a and b), a-c, b-c, or a-b-c, wherein a, b, and c can be single or multiple respectively.
It should be understood that the weight of the related components mentioned in the embodiments of the present invention may not only refer to the specific content of each component, but also represent the proportional relationship of the weight among the components, and therefore, it is within the scope of the disclosure that the content of the related components is scaled up or down according to the embodiments of the present invention. Specifically, the weight described in the embodiments of the present invention may be a unit of mass known in the chemical field such as μ g, mg, g, kg, etc.
In addition, unless the context clearly uses otherwise, an expression of a word in the singular is to be understood as including the plural of the word. The terms "comprises" or "comprising" are intended to specify the presence of stated features, quantities, steps, operations, elements, portions, or combinations thereof, but are not intended to preclude the presence or addition of one or more other features, quantities, steps, operations, elements, portions, or combinations thereof.
The embodiment of the invention provides a powder material which comprises the following components in parts by weight:
in the powder material provided by the embodiment of the invention, on one hand, the quartz, the feldspar and the whiskers are mixed, and the main component of the quartz is silicon dioxide, so that the powder material has the advantages of higher hardness, good insulating property, low expansion coefficient, fire resistance, corrosion resistance and the like, and is favorable for improving the stability of the obtained powder material; the feldspar is beneficial to reducing the subsequent treatment temperature of the obtained powder material, and the problem of overhigh sintering temperature is avoided; the crystal whisker has higher mechanical property and thermal property, and can improve the toughness of the obtained powder material, so that the powder material has excellent bending resistance. On the other hand, the organic acid is added, so that the feldspar surface can be subjected to acid washing modification to play an activating role, edges and corners of feldspar particles are eroded and passivated by the organic acid, the surface roughness and the sphericity of the obtained powder material are increased, the flowability of the obtained powder material is improved, the affinity between the powder material and a curing agent can be increased, and the application prospect is good.
Specifically, according to the embodiment of the invention, quartz, feldspar and whiskers are mixed according to a specific addition amount, wherein the quartz is used as a framework material, which is beneficial to providing support for the configuration of a 3D printed product, and can prevent the product from melting, deforming and the like at high temperature, so that the quartz occupies a larger proportion. Feldspar is used as a molten substance, is in a liquid phase at high temperature, can promote the flowability of the powder material and can remove part of bubbles; meanwhile, the glass phase formed after the feldspar is calcined can bond quartz, whisker and other particles together without loosening. The addition amount of feldspar in the embodiment of the invention is more critical, and if the addition amount is too large, quartz is easily melted, so that the product has a deformation problem. In the embodiment of the invention, the addition amount of the whisker is small, and if the addition amount is too large, the flowability of the powder material is influenced, and the cost of the powder material is too high.
In some embodiments, the organic acid is selected from at least one of tartaric acid, malic acid and succinic acid, preferably any two or three of tartaric acid, malic acid and succinic acid, and is used for pickling activated feldspar. Specifically, tartaric acid, malic acid and succinic acid which are low molecular weight organic acids are added to carry out acid pickling modification on feldspar, so that edges and corners of feldspar particles are eroded and passivated, and meanwhile, the roughness and sphericity of powder particles are increased, and further, the powder has high fluidity and high affinity with a curing agent. In the examples of the present invention, it is not appropriate to replace the organic acid with an inorganic acid.
Further, the organic acid is preferably a mixed organic acid in which any two of tartaric acid, malic acid and succinic acid are mixed in a mass ratio of 1 (0.5-2), or a mixed organic acid in which tartaric acid, malic acid and succinic acid are mixed in a mass ratio of 1 (0.5-2) to (0.5-2). When the feldspar with the specific content provided by the embodiment of the invention is modified by acid washing, the modification and activation effects on the feldspar particles can be further improved.
In some embodiments, the quartz is β -quartz. The main component of the beta-quartz is silicon dioxide, and the beta-quartz has the advantages of wide source and low cost. In some specific embodiments, the spheroidal beta-quartz is selected as much as possible, and edges and corners of spheroidal quartz particles are fewer, so that the flowability of the obtained powder material is improved.
In some embodiments, quartz having a particle size of 50 μm to 150 μm is selected. If the particle size of quartz is larger than 150 μm, the precision of the obtained powder material in 3D printing is easily affected; if the particle size of the quartz is smaller than 50 μm, powder spreading of the obtained powder material during 3D printing is not facilitated. It should be noted that the quartz particles provided in the embodiments of the present invention are not necessarily regular spheres, and the particle size herein should be understood as the longest distance between two ends of the particle. Specifically, typical, but not limiting, quartz particle sizes are 50 μm, 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 110 μm, 120 μm, 130 μm, 140 μm, 150 μm.
In some embodiments, the feldspar is selected from albite (Na)2O·Al2O3·6SiO2) Potassium feldspar (K)2O·Al2O3·6SiO2) And at least one of alkali feldspar. When the traditional silicon dioxide powder is used for 3D printing, the obtained printed product needs higher temperature for sintering and forming. According to the embodiment of the invention, at least one of albite, potassium feldspar and alkali feldspar is added, so that the sintering temperature of the printed product is favorably reduced, and the energy consumption is saved. In some specific embodiments, the spheroidal feldspar is selected as far as possible, edge edges and corners of the spheroidal feldspar particles are few, and the flowability of the obtained powder material is improved.
In some embodiments, feldspar with a particle size of 60 μm to 120 μm is selected. If the particle size of the feldspar is larger than 150 micrometers, the precision of the obtained powder material in 3D printing is easily influenced; if the particle size of the feldspar is smaller than 50 μm, the powder spreading of the obtained powder material during 3D printing is not facilitated. It should be noted that the feldspar particles provided by the embodiments of the present invention are not necessarily regular spheres, and the particle size herein should be understood as the longest distance between the two ends of the particle. Specifically, typical, but not limiting, feldspar particle sizes are 60 μm, 70 μm, 80 μm, 90 μm, 100 μm, 110 μm, 120 μm.
In some embodiments, the whiskers are selected from at least one of mullite whiskers, alumina whiskers, silicon carbide whiskers, aluminum nitride whiskers, preferably mullite whiskers. The mullite whisker has the advantages of high length-diameter ratio and good mechanical property and thermal property, is favorable for further improving the excellent anti-bending property of the powder material, and fully meets the requirements of the 3D ink-jet printing technology on the material property. In addition, only a small amount of whiskers are added into the powder material provided by the embodiment of the invention, and the flowability of the powder material is not influenced.
In some embodiments, whiskers having a diameter of 0.02 μm to 0.2 μm and a length of 1 μm to 10 μm are selected. By optimizing the length-diameter ratio of the crystal whisker, the toughening effect of the crystal whisker on the powder material is favorably improved, so that the powder material has excellent fracture resistance. Specifically, typical but not limiting whisker diameters are 0.02 μm, 0.03 μm, 0.04 μm, 0.05 μm, 0.06 μm, 0.07 μm, 0.08 μm, 0.09 μm, 0.1 μm, 0.11 μm, 0.12 μm, 0.13 μm, 0.14 μm, 0.15 μm, 0.16 μm, 0.17 μm, 0.18 μm, 0.19 μm, 0.2 μm; typical but non-limiting whisker lengths are 1 μm, 2 μm, 3 μm, 4 μm, 5 μm, 6 μm, 7 μm, 8 μm, 9 μm, 10 μm.
The powder material provided by the embodiment of the invention can be prepared by the following method.
Correspondingly, the embodiment of the invention provides a preparation method of a powder material, which comprises the following steps:
s1, mixing quartz, feldspar, crystal whiskers, organic acid and water to obtain a mixture;
and S2, carrying out solid-liquid separation and drying treatment on the mixture to obtain a powder material.
In the preparation method of the powder material provided by the embodiment of the invention, in the process of mixing quartz, feldspar and whisker with organic acid and water, the organic acid performs acid cleaning modification on the surface of the feldspar to play an activating role, so that edges and corners of feldspar particles are eroded and passivated, and meanwhile, the surface roughness and sphericity of the obtained powder material are increased, thus not only improving the flowability of the obtained powder material, but also increasing the affinity between the powder material and a curing agent. The preparation method provided by the embodiment of the invention has the advantages of simple and controllable process, low cost and suitability for large-scale production, and the prepared powder material has good fluidity and lower subsequent treatment temperature, and also has excellent bending resistance and good application prospect.
Specifically, in S1, the specific raw material sources and parameters of quartz, feldspar, whiskers and organic acid are selected as described above, and are not described herein again. The quartz and the feldspar are natural minerals, and in some embodiments, impurities of the natural minerals are removed as much as possible by means of pretreatment. Specifically, the pretreatment method comprises the steps of respectively washing quartz and feldspar with deionized water repeatedly to remove impurities, then screening to enable the particle size of the quartz to be 50-150 μm and the particle size of the feldspar to be 60-120 μm, and a microscopic picture of the screened quartz and feldspar is shown in fig. 1.
The water plays a role in dissolving the organic acid in the embodiment of the invention, and further can fully act on the surface of the feldspar, so that the activation effect is improved. In some embodiments, water is added in an amount 60 to 5000 times that of the organic acid. Too much water is not beneficial to the subsequent drying treatment, too little quartz and feldspar are difficult to be fully contacted, and the quartz and feldspar cannot be fully activated by organic acid.
In some embodiments, since the organic acid is used to activate feldspar, the organic acid and water may be mixed first, and then the quartz and the whisker are mixed after activation. The addition time of the quartz and whiskers does not affect the properties of the resulting mixture.
In some embodiments, the quartz, feldspar, whiskers, organic acid and water are mixed by ultrasonic dispersion for 15min to 30min under stirring. If the ultrasonic dispersion time is too short, the dispersion effect of each raw material is poor, and the pickling effect of the organic acid on the feldspar is not obvious; the ultrasonic dispersion time is too long, and the production cost is easily increased. In particular, typical, but not limiting, ultrasonic dispersion times are 15min, 20min, 25min, 30 min.
In S2, the mixture was subjected to solid-liquid separation and drying treatment to remove water added in S1. The method for separating solid from liquid is not particularly limited, and the method can adopt methods such as filtration, suction filtration, centrifugation and the like according to actual conditions so as to obtain solid with most of water removed. And then, drying the solid to completely remove the moisture in the solid so as to obtain a dry powder material. In some embodiments, the temperature of the drying treatment is 60 ℃ to 85 ℃ and the time of the drying treatment is 10h to 24 h. Specifically, typical but non-limiting drying treatment temperatures are 60 ℃, 65 ℃, 70 ℃, 75 ℃, 80 ℃, 85 ℃; typical but not limiting drying treatment times are 10h, 12h, 14h, 15h, 16h, 18h, 20h, 22h, 24 h.
The embodiment of the invention also provides an application of the powder material provided by the embodiment of the invention or the powder material prepared by the preparation method of the powder material provided by the embodiment of the invention in 3D printing.
The powder material provided by the embodiment of the invention has the advantages of good fluidity, high affinity with a curing agent, good folding resistance and the like, and when the powder material is used as a material for 3D printing, the requirements of a 3D ink-jet printing technology on the printing material are met, the curing effect of a printed product can be improved, and the subsequent treatment temperature of the printed product is favorably reduced.
In order to make the above implementation details and operations of the present invention clearly understood by those skilled in the art and obviously show the advanced performance of the powder material, the preparation method and the application thereof in the embodiments of the present invention, the technical solutions are illustrated by the following examples.
Example 1
The embodiment provides a preparation method of a powder material for 3D printing, which comprises the following steps:
(11) pretreatment of beta-quartz and albite: respectively and repeatedly washing beta-quartz and albite with deionized water to remove impurities, and then screening to ensure that the grain diameter of the beta-quartz is 75-100 mu m, the grain diameter of the albite is 75-100 mu m, and a picture of the surface micro-morphology of the albite is shown in figure 2;
(12) surface activation treatment: adding 5 parts by weight of albite into a container, adding 300 parts by weight of water and 0.1 part by weight of malic acid into the albite obtained in the step (11), stirring the mixture in an electric stirrer, performing ultrasonic dispersion treatment for 20 minutes, performing suction filtration on the solid-liquid mixture, repeatedly washing the obtained filter cake, drying the filter cake at 70 +/-0.5 ℃ for 20 hours, removing water, and obtaining the albite with the activated surface, wherein a microscopic surface morphology picture of the albite is shown in figure 3;
(13) and (3) adding 70 parts by weight of beta-quartz in the beta-quartz obtained in the step (11) and 5 parts by weight of mullite whiskers with the diameter of 0.1-0.2 mu m and the length of 1-5 mu m (shown in an electron microscope picture of figure 4) into the activated albite obtained in the step (12), and uniformly mixing the three kinds of powder by using an electric stirrer to obtain a powder material with fluidity.
As can be seen from fig. 2, the albite surface before the activation treatment is relatively flat, and a few steps and holes are visible, which are due to the defects formed during the diagenetic process of the albite. As can be seen from the graph in FIG. 3, after the activation treatment, the albite surface is not smooth any more under the action of organic acid hydrogen ions and acid radical anions, and a large number of regular square corrosion pits are generated.
As can be seen from FIG. 4, the diameter of the mullite whisker is 0.05-0.2 μm, the length of the mullite whisker can reach more than 5 μm, and the length-diameter ratio is within the range of 25-100.
Detecting the obtained powder material, wherein the repose angle is 25 degrees; the acid consumption value is 5.1mL, the affinity with the curing agent is high, and the tensile strength of the splayed block after 1 hour of curing is 1.8 MPa.
Example 2
The embodiment provides a preparation method of a powder material for 3D printing, which comprises the following steps:
(21) pretreatment of beta-quartz and alkali feldspar: respectively and repeatedly washing beta-quartz and alkali feldspar with deionized water to remove impurities, and then screening to ensure that the particle size of the beta-quartz is 80-150 mu m and the particle size of the alkali feldspar is 75-150 mu m;
(22) surface activation treatment: adding 7 parts by weight of alkali feldspar in the alkali feldspar obtained in the step (21) into a container, then adding 400 parts by weight of water, 0.5 part by weight of succinic acid and 0.5 part by weight of malic acid, stirring in an electric stirrer, simultaneously carrying out ultrasonic dispersion treatment for 25 minutes, then carrying out suction filtration on the solid-liquid mixture, repeatedly washing the obtained filter cake, drying at 75 +/-0.5 ℃ for 15 hours, and removing water to obtain the alkali feldspar with the activated surface (the photos before and after treatment are shown in figure 5);
(23) and (3) adding 80 parts by weight of the beta-quartz obtained in the step (21) and 7 parts by weight of silicon carbide whiskers (shown in an electron microscope picture of figure 6) with the diameter of 0.05-0.1 mu m and the length of 2-6 mu m into the activated alkali feldspar obtained in the step (22), and uniformly mixing the three kinds of powder by using an electric stirrer to obtain the powder material with fluidity.
Detecting the obtained powder material, wherein the repose angle is 25 degrees; the acid consumption value is 4.9mL, the affinity with the curing agent is high, and the tensile strength of the splayed block after 1 hour of curing is 2.0 MPa.
Example 3
The embodiment provides a preparation method of a powder material for 3D printing, which comprises the following steps:
(31) pretreatment of beta-quartz and potassium feldspar: respectively and repeatedly washing beta-quartz and potassium feldspar with deionized water to remove impurities, and then screening to ensure that the grain diameter of the beta-quartz is 50-150 mu m and the grain diameter of the potassium feldspar is 60-100 mu m;
(32) surface activation treatment of potassium feldspar: adding 10 parts by weight of potassium feldspar in the potassium feldspar obtained in the step (31) into a container, then adding 500 parts by weight of water and 5 parts by weight of succinic acid, stirring in an electric stirrer, simultaneously carrying out ultrasonic dispersion treatment for 25 minutes, then carrying out suction filtration on the solid-liquid mixture, repeatedly washing the obtained filter cake, drying at 70 +/-0.5 ℃ for 20 hours, and removing water to obtain the surface-activated potassium feldspar (the photos before and after treatment are shown in figure 7);
(33) and (3) adding 90 parts by weight of the beta-quartz obtained in the step (31) and 10 parts by weight of alumina whiskers (shown in an electron microscope picture of figure 8) with the diameter of 0.02-0.2 microns and the length of 1-10 microns into the activated potash feldspar obtained in the step (32), and uniformly mixing the three kinds of powder by using an electric stirrer to obtain the powder material with fluidity.
Detecting the obtained powder material, wherein the repose angle is 27 degrees; the acid consumption value is 5.0mL, the affinity with the curing agent is high, and the tensile strength of the splayed block after 1 hour of curing is 1.9 MPa.
Comparative example
This comparative example is essentially the same as example 3, except that 5 parts by weight of succinic acid was replaced with 5 parts by weight of sulfuric acid.
The powder material obtained is detected, the angle of repose is 45 degrees, the acid consumption value is 6.0mL, the affinity with the curing agent is general, and the tensile strength of the splayed block after 1 hour of curing is 0.8 MPa.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. The powder material is characterized by comprising the following components in parts by weight:
2. the powder material according to claim 1, wherein the quartz has a particle size of 50 μm to 150 μm; and/or
The quartz is beta-quartz.
3. The powder material as claimed in claim 1, wherein the particle size of the feldspar is 60-120 μm; and/or
The feldspar is selected from at least one of albite, potassium feldspar and alkali feldspar.
4. The powder material of claim 1, wherein the whiskers have a diameter of 0.02 μ ι η to 0.2 μ ι η and a length of 1 μ ι η to 10 μ ι η; and/or
The whisker is selected from at least one of mullite whisker, alumina whisker, silicon carbide whisker and aluminum nitride whisker.
5. A powder material according to any one of claims 1 to 4, wherein the organic acid is at least one selected from tartaric acid, malic acid and succinic acid.
6. The preparation method of the powder material is characterized by comprising the following steps:
mixing quartz, feldspar, crystal whiskers, organic acid and water to obtain a mixture;
and carrying out solid-liquid separation and drying treatment on the mixture to obtain a powder material.
7. The method for preparing the powder material according to claim 6, wherein the particle size of the quartz is 50 μm to 150 μm; and/or
The particle size of the feldspar is 60-120 mu m; and/or
The diameter of the whisker is 0.02-0.2 μm, and the length is 1-10 μm.
8. A method for preparing a powder material according to claim 6 or 7, wherein the mixing treatment is carried out by ultrasonic dispersion for 15min to 30min under stirring.
9. The method for preparing the powder material according to claim 6 or 7, wherein the temperature of the drying treatment is 60 ℃ to 85 ℃, and the time of the drying treatment is 10h to 24 h.
10. Use of the powder material according to any one of claims 1 to 5 or the powder material prepared by the method according to any one of claims 6 to 9 in 3D printing.
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| CN114276035A (en) * | 2022-01-25 | 2022-04-05 | 毛春华 | Preparation method of beta-type high-strength desulfurized gypsum powder |
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