CN112456540A - Environment-friendly high-new powder material and preparation method thereof - Google Patents

Environment-friendly high-new powder material and preparation method thereof Download PDF

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CN112456540A
CN112456540A CN202011492732.9A CN202011492732A CN112456540A CN 112456540 A CN112456540 A CN 112456540A CN 202011492732 A CN202011492732 A CN 202011492732A CN 112456540 A CN112456540 A CN 112456540A
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powder material
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杜孝硕
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Xuzhou Yasur High Tech Materials Co ltd
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Abstract

The invention relates to an environment-friendly high-new powder material which is prepared from the following raw materials in parts by weight: 80-100 parts of aluminum-doped zinc oxide, 25-35 parts of lanthanum strontium manganese oxide, 10-18 parts of titanium diboride, 50-60 parts of boron carbide, 5-8 parts of carbon black and 8-15 parts of silicon powder. The preparation method comprises the following steps: weighing the raw materials according to the weight parts of the formula, putting the raw materials into a planetary ball mill for ball milling for 4-5h, and drying to obtain mixed powder; then putting the mixture into a plasma activation calcining furnace for calcining for 1-2 h; the powder material of the invention is a novel functional ceramic powder material, can be used as a powder material of a dielectric and piezoelectric complex phase ceramic product, can produce the complex phase ceramic product with high temperature resistance, moisture resistance, good dielectric property and piezoelectric property, stable phase structure, good uniformity, high compactness and stable and superior performance, and has great production benefit and practical value.

Description

Environment-friendly high-new powder material and preparation method thereof
Technical Field
The invention belongs to the technical field of aluminum alloy, and particularly relates to an environment-friendly high-new powder material and a preparation method thereof.
Background
A large amount of pollutants are generated in the preparation process of the powder material, and if the pollutants are not properly treated, the pollutants can greatly influence the atmospheric environment. Influenced by environmental protection factors, the powder material industry speeds up the steps of energy conservation and emission reduction, and the way of energy conservation, environmental protection and low carbon emission is a non-returnable way. Therefore, various aspects of obtaining environment-friendly and high-new powder materials are under discussion, such as improvement of the prior art and composition of various processes, improvement of the prior art and equipment, production of high-value-added powder material products by more economical, more novel and environment-friendly means, upgrading of efficient detection and characterization technologies, and the like. The requirements of high and new technology on the performance and the processing technology of the functional powder material are high purity and ultra-fine, so that the functional powder material has excellent sound, light, electricity and magnetic properties, good dispersibility, adsorbability and reactivity, excellent reinforcing property and crystal structure stability in specific application. In addition, the adoption of more economical and effective preparation methods and/or production processes is an important direction for the development of powder material technology.
The zinc oxide powder is favored by various industries because of the advantages of no toxicity, no odor, low cost, light color, light weight, no stimulation to skin, ultraviolet ray shielding, infrared ray absorption, antibiosis and mildew prevention, capability of being used as an electromagnetic wave shielding material, and being a component of an antistatic coating, and the like, but the intrinsic conductive capability of the zinc oxide powder is very low, and the zinc oxide powder is used as a conductive filler or a piezoelectric ceramic material, is further applied to a functional ceramic material in the fields of ultrasonic transduction, sensors, nondestructive testing, communication and the like, and has a greatly improved space.
Disclosure of Invention
The purpose of the invention is as follows: the invention aims to provide an environment-friendly high-new powder material and a preparation method thereof, the environment-friendly high-new powder material is a novel functional ceramic powder material, can be used as a powder material of a dielectric and piezoelectric complex phase ceramic product, has the advantages of simple process, strong controllability, low cost, high production efficiency, environmental friendliness and capability of producing the complex phase ceramic product with high temperature resistance, steam resistance, good dielectric property and piezoelectric property, stable phase structure, good uniformity, high compactness and stable and superior performance.
The technical scheme adopted by the invention is as follows: the invention provides an environment-friendly high-new powder material which is prepared from the following raw materials in parts by weight:
80-100 parts of aluminum-doped zinc oxide
25-35 parts of lanthanum strontium manganese oxide
10-18 parts of titanium diboride
50-60 parts of boron carbide
5-8 parts of carbon black
8-15 parts of silicon powder.
Preferably, the environment-friendly high-new powder material is prepared from the following raw materials in parts by weight:
100 parts of aluminum-doped zinc oxide
32 parts of lanthanum strontium manganese oxide
15 portions of titanium diboride
56 parts of boron carbide
Carbon black 8 parts
10 parts of silicon powder.
Further, the aluminum-doped zinc oxide is prepared by a hydrothermal synthesis method.
Further, the preparation method of the aluminum-doped zinc oxide comprises the following steps: (a) adding absolute ethyl alcohol into a hydro-thermal synthesis reaction kettle, and slowly adding zinc nitrate and aluminum nitrate while stirring; (b) screwing down the hydro-thermal synthesis reaction kettle, putting the hydro-thermal synthesis reaction kettle into a drying oven, setting the temperature of the drying oven to be 90-120 ℃, and carrying out hydro-thermal reaction for 3 hours; (c) taking out the hydrothermal synthesis reaction kettle, cooling to room temperature, respectively cleaning reaction products by using absolute ethyl alcohol and deionized water, dissolving the reaction products in a small amount of deionized water, performing ultrasonic treatment for 20 minutes, and freeze-drying to obtain aluminum-doped zinc oxide nano powder; (d) calcining the aluminum-doped zinc oxide nano powder obtained in the step (c) for 3 hours in a hydrogen atmosphere at the temperature of 500-600 ℃.
Furthermore, the concentration of the zinc nitrate is 2-4mol/L, the concentration of the aluminum nitrate is 0.05-0.1mol/L, and the molar ratio of the aluminum nitrate to the zinc nitrate is 0.01: 1.
Further, the lanthanum strontium manganese oxide is a nano lanthanum strontium manganese oxide with a particle size of 30-50nm, and is prepared from raw materials including lanthanum oxide, strontium nitrate, manganese nitrate, nitric acid, polyethylene glycol and ammonia water.
Furthermore, the molar ratio of the lanthanum oxide to the strontium nitrate to the manganese nitrate is 0.3: 0.2: 1.
Further, the specific preparation method of the lanthanum strontium manganese oxide comprises the following steps: A. weighing lanthanum oxide, strontium nitrate and manganese nitrate, dissolving the lanthanum oxide in nitric acid with the concentration of 30-35%, wherein the molar ratio of the nitric acid to the lanthanum oxide is 2: 1; obtaining a solution, after the solution is clarified, sequentially adding strontium nitrate and manganese nitrate into the solution, stirring, and simultaneously adding polyethylene glycol, wherein the molar ratio of the polyethylene glycol to the nitric acid is 1: 2, so as to obtain a precursor solution; B. introducing ammonia water as a precipitator into a titration container, wherein the ammonia water is mixed with La3+、Sr2+、Mn2 +The molar ratio of the sum of the mole numbers of the metal ions is 1.05: 1; dropwise adding the ammonia water solution in the titration container into the precursor solution obtained in the step A, stirring at the rotation speed of 400-1000r/min, and precipitating at room temperature for 3-4 hours to obtain a suspension; C. putting the suspension obtained in the step B into a drying oven, and keeping the temperature at 80-90 ℃ until the suspension is completely precipitated; D. and (4) washing and drying the precipitate obtained in the step (C), and then carrying out heat treatment at 600-700 ℃ for 2-3 hours to obtain the powdery nano lanthanum strontium manganese oxide.
Further, the preparation method of the environment-friendly high-new powder material comprises the following steps: (1) weighing aluminum-doped zinc oxide, lanthanum strontium manganese oxide, boron carbide powder, titanium boride powder, amorphous carbon powder and silicon powder according to the weight parts of the formula, putting the materials into a planetary ball mill, adding absolute ethyl alcohol, setting the rotating speed of the ball mill to be 100-inch and 200r/min, and carrying out ball milling for 4-5h to obtain mixed slurry; (2) drying the mixed slurry obtained in the step (1) to obtain mixed powder; (3) placing the mixed powder into a plasma activation calcining furnace for calcining, wherein the calcining temperature is set to be 1000-1200 ℃; preserving the heat for 1-2 h; (4) cooling to room temperature to obtain the environment-friendly high-new powder material.
Furthermore, the environment-friendly high-new powder material can be used for preparing complex phase ceramic products.
The complex phase ceramic product is prepared from the environment-friendly high-new powder material, and the preparation method of the complex phase ceramic product comprises the following steps: putting the environment-friendly high-tech powder material into a graphite mold for dry pressing and molding, and carrying out cold isostatic pressing treatment under the pressure of 100MPa for 30min to obtain a green body; and then placing the green body into a graphite vacuum sintering furnace for sintering at the sintering temperature of 2000-2150 ℃ for 2-3h to obtain the complex phase ceramic product.
The invention has the beneficial effects that: the environment-friendly high-new powder material is a novel functional ceramic powder material, can be used as a powder material of a dielectric and piezoelectric complex phase ceramic product, has the advantages of simple process, strong controllability, low cost, high production efficiency, environmental friendliness, capability of producing the complex phase ceramic product with high temperature resistance, steam resistance, good dielectric property and piezoelectric property, stable phase structure, good uniformity, high compactness and stable and superior performance, and has great production benefit and practical value.
Detailed Description
The invention will be further elucidated by means of several specific examples, which are intended to be illustrative only and not limiting.
Example 1:
an environment-friendly high-new powder material is prepared from the following raw materials in parts by weight:
100 parts of aluminum-doped zinc oxide
32 parts of lanthanum strontium manganese oxide
18 portions of titanium diboride
56 parts of boron carbide
Carbon black 8 parts
10 parts of silicon powder.
Further, the aluminum-doped zinc oxide is prepared by a hydrothermal synthesis method.
Further, the preparation method of the aluminum-doped zinc oxide comprises the following steps: (a) adding absolute ethyl alcohol into a hydro-thermal synthesis reaction kettle, and slowly adding zinc nitrate and aluminum nitrate while stirring; (b) screwing down the hydro-thermal synthesis reaction kettle, putting the hydro-thermal synthesis reaction kettle into a drying oven, setting the temperature of the drying oven to be 120 ℃, and carrying out hydro-thermal reaction for 3 hours; (c) taking out the hydrothermal synthesis reaction kettle, cooling to room temperature, respectively cleaning reaction products by using absolute ethyl alcohol and deionized water, dissolving the reaction products in a small amount of deionized water, performing ultrasonic treatment for 20 minutes, and freeze-drying to obtain aluminum-doped zinc oxide nano powder; (d) calcining the aluminum-doped zinc oxide nano powder obtained in the step (c) for 3 hours in a hydrogen atmosphere at the temperature of 600 ℃.
Furthermore, the concentration of the zinc nitrate is 2mol/L, the concentration of the aluminum nitrate is 0.05mol/L, and the molar ratio of the aluminum nitrate to the zinc nitrate is 0.025: 1.
Further, the lanthanum strontium manganese oxide is a nano lanthanum strontium manganese oxide with a particle size of 30-50nm, and is prepared from raw materials including lanthanum oxide, strontium nitrate, manganese nitrate, nitric acid, polyethylene glycol and ammonia water.
Furthermore, the molar ratio of the lanthanum oxide to the strontium nitrate to the manganese nitrate is 0.3: 0.2: 1.
Further, the specific preparation method of the lanthanum strontium manganese oxide comprises the following steps: A. weighing lanthanum oxide, strontium nitrate and manganese nitrate, dissolving the lanthanum oxide in nitric acid with the concentration of 30-35%, wherein the molar ratio of the nitric acid to the lanthanum oxide is 2: 1; obtaining a solution, after the solution is clarified, sequentially adding strontium nitrate and manganese nitrate into the solution, stirring, and simultaneously adding polyethylene glycol, wherein the molar ratio of the polyethylene glycol to the nitric acid is 1: 2, so as to obtain a precursor solution; B. introducing ammonia water as a precipitator into a titration container, wherein the ammonia water is mixed with La3+、Sr2+、Mn2 +The molar ratio of the sum of the mole numbers of the metal ions is 1.05: 1; dropwise adding the ammonia water solution in the titration container into the precursor solution obtained in the step A, stirring at the rotation speed of 800r/min, and precipitating at room temperature for 4 hours to obtain a suspension; C. putting the suspension obtained in the step B into a drying box, and keeping the temperature at 85 ℃ until the suspension is completely precipitated; D. and (4) washing and drying the precipitate obtained in the step (C), and then carrying out heat treatment at 650 ℃ for 2.5 hours to obtain the powdery nano lanthanum strontium manganese oxide.
Further, the preparation method of the environment-friendly high-new powder material comprises the following steps: (1) weighing aluminum-doped zinc oxide, lanthanum strontium manganese oxide, boron carbide powder, titanium boride powder, amorphous carbon powder and silicon powder according to the weight parts of the formula, putting the materials into a planetary ball mill, adding absolute ethyl alcohol, setting the rotating speed of the ball mill to be 200r/min, and carrying out ball milling for 4 hours to obtain mixed slurry; (2) drying the mixed slurry obtained in the step (1) to obtain mixed powder; (3) placing the mixed powder into a plasma activation calcining furnace for calcining, wherein the calcining temperature is set to 1200 ℃; preserving the heat for 1.5 h; (4) cooling to room temperature to obtain the environment-friendly high-new powder material.
Furthermore, the environment-friendly high-new powder material can be used for preparing complex phase ceramic products.
The complex phase ceramic product is prepared from the environment-friendly high-new powder material, and the preparation method of the complex phase ceramic product comprises the following steps: putting the environment-friendly high-tech powder material into a graphite mold for dry pressing and molding, and carrying out cold isostatic pressing treatment under the pressure of 100MPa for 30min to obtain a green body; and then, putting the green body into a graphite vacuum sintering furnace for sintering at the sintering temperature of 2150 ℃ for 2 hours to obtain the complex phase ceramic product.
The performance characterization result of the obtained environment-friendly high-new powder material is as follows: the melting temperature was 2550 ℃ and the dielectric constant (real part) was 58 and the dielectric constant (imaginary part) was 215 at 300K. The obtained complex phase ceramic product has a true density of 6.9g/cm3The apparent density is 0.64 g/cm3。
Example 2:
an environment-friendly high-new powder material is prepared from the following raw materials in parts by weight:
80 parts of aluminum-doped zinc oxide
25 parts of lanthanum strontium manganese oxide
15 portions of titanium diboride
50 portions of boron carbide
Carbon black 5 parts
And 15 parts of silicon powder.
Further, the aluminum-doped zinc oxide is prepared by a hydrothermal synthesis method.
Further, the preparation method of the aluminum-doped zinc oxide comprises the following steps: (a) adding absolute ethyl alcohol into a hydro-thermal synthesis reaction kettle, and slowly adding zinc nitrate and aluminum nitrate while stirring; (b) screwing down the hydro-thermal synthesis reaction kettle, putting the hydro-thermal synthesis reaction kettle into an oven, setting the temperature of the oven to be 100 ℃, and carrying out hydro-thermal reaction for 3 hours; (c) taking out the hydrothermal synthesis reaction kettle, cooling to room temperature, respectively cleaning reaction products by using absolute ethyl alcohol and deionized water, dissolving the reaction products in a small amount of deionized water, performing ultrasonic treatment for 20 minutes, and freeze-drying to obtain aluminum-doped zinc oxide nano powder; (d) calcining the aluminum-doped zinc oxide nano powder obtained in the step (c) for 3 hours in a hydrogen atmosphere at the temperature of 550 ℃.
Furthermore, the concentration of the zinc nitrate is 3mol/L, the concentration of the aluminum nitrate is 0.03mol/L, and the molar ratio of the aluminum nitrate to the zinc nitrate is 0.01: 1.
Further, the lanthanum strontium manganese oxide is a nano lanthanum strontium manganese oxide with a particle size of 30-50nm, and is prepared from raw materials including lanthanum oxide, strontium nitrate, manganese nitrate, nitric acid, polyethylene glycol and ammonia water.
Furthermore, the molar ratio of the lanthanum oxide to the strontium nitrate to the manganese nitrate is 0.3: 0.2: 1.
Further, the specific preparation method of the lanthanum strontium manganese oxide comprises the following steps: A. weighing lanthanum oxide, strontium nitrate and manganese nitrate, dissolving the lanthanum oxide in nitric acid with the concentration of 30-35%, wherein the molar ratio of the nitric acid to the lanthanum oxide is 2: 1; obtaining a solution, after the solution is clarified, sequentially adding strontium nitrate and manganese nitrate into the solution, stirring, and simultaneously adding polyethylene glycol, wherein the molar ratio of the polyethylene glycol to the nitric acid is 1: 2, so as to obtain a precursor solution; B. introducing ammonia water as a precipitator into a titration container, wherein the ammonia water is mixed with La3+、Sr2+、Mn2 +The molar ratio of the sum of the mole numbers of the metal ions is 1.05: 1; dropwise adding the ammonia water solution in the titration container into the precursor solution obtained in the step A, stirring at the rotation speed of 400r/min, and precipitating at room temperature for 3.5 hours to obtain a suspension; C. putting the suspension obtained in the step B into a drying oven, and keeping the temperature at 90 DEG CThe temperature is controlled until the suspension becomes a precipitate completely; D. and (4) washing and drying the precipitate obtained in the step (C), and then carrying out heat treatment at 700 ℃ for 2 hours to obtain the powdery nano lanthanum strontium manganese oxide.
Further, the preparation method of the environment-friendly high-new powder material comprises the following steps: (1) weighing aluminum-doped zinc oxide, lanthanum strontium manganese oxide, boron carbide powder, titanium boride powder, amorphous carbon powder and silicon powder according to the weight parts of the formula, putting the materials into a planetary ball mill, adding absolute ethyl alcohol, setting the rotating speed of the ball mill to be 100r/min, and carrying out ball milling for 5 hours to obtain mixed slurry; (2) drying the mixed slurry obtained in the step (1) to obtain mixed powder; (3) placing the mixed powder into a plasma activation calcining furnace for calcining, wherein the calcining temperature is set to be 1000 ℃; preserving the heat for 1 h; (4) cooling to room temperature to obtain the environment-friendly high-new powder material.
Furthermore, the environment-friendly high-new powder material can be used for preparing complex phase ceramic products.
The complex phase ceramic product is prepared from the environment-friendly high-new powder material, and the preparation method of the complex phase ceramic product comprises the following steps: putting the environment-friendly high-tech powder material into a graphite mold for dry pressing and molding, and carrying out cold isostatic pressing treatment under the pressure of 100MPa for 30min to obtain a green body; and then, putting the green body into a graphite vacuum sintering furnace for sintering, wherein the sintering temperature is 2000 ℃, and keeping the temperature for 3 hours to obtain the complex phase ceramic product.
The performance characterization result of the obtained environment-friendly high-new powder material is as follows: the melting temperature was 2420 ℃ and the dielectric constant (real part) was 53 and the dielectric constant (imaginary part) was 204 at 300K. The obtained complex phase ceramic product has a true density of 6.8g/cm3Apparent density of 0.62 g/cm3。
Example 3:
an environment-friendly high-new powder material is prepared from the following raw materials in parts by weight:
90 parts of aluminum-doped zinc oxide
35 parts of lanthanum strontium manganese oxide
10 portions of titanium diboride
60 portions of boron carbide
Carbon black 6 parts
And 8 parts of silicon powder.
Further, the aluminum-doped zinc oxide is prepared by a hydrothermal synthesis method.
Further, the preparation method of the aluminum-doped zinc oxide comprises the following steps: (a) adding absolute ethyl alcohol into a hydro-thermal synthesis reaction kettle, and slowly adding zinc nitrate and aluminum nitrate while stirring; (b) screwing down the hydro-thermal synthesis reaction kettle, putting the hydro-thermal synthesis reaction kettle into a drying oven, setting the temperature of the drying oven to be 110 ℃, and carrying out hydro-thermal reaction for 3 hours; (c) taking out the hydrothermal synthesis reaction kettle, cooling to room temperature, respectively cleaning reaction products by using absolute ethyl alcohol and deionized water, dissolving the reaction products in a small amount of deionized water, performing ultrasonic treatment for 20 minutes, and freeze-drying to obtain aluminum-doped zinc oxide nano powder; (d) calcining the aluminum-doped zinc oxide nano powder obtained in the step (c) for 3 hours in a hydrogen atmosphere at the temperature of 500 ℃.
Furthermore, the concentration of the zinc nitrate is 4mol/L, the concentration of the aluminum nitrate is 0.08mol/L, and the molar ratio of the aluminum nitrate to the zinc nitrate is 0.01: 1.
Further, the lanthanum strontium manganese oxide is a nano lanthanum strontium manganese oxide with a particle size of 30-50nm, and is prepared from raw materials including lanthanum oxide, strontium nitrate, manganese nitrate, nitric acid, polyethylene glycol and ammonia water.
Furthermore, the molar ratio of the lanthanum oxide to the strontium nitrate to the manganese nitrate is 0.3: 0.2: 1.
Further, the specific preparation method of the lanthanum strontium manganese oxide comprises the following steps: A. weighing lanthanum oxide, strontium nitrate and manganese nitrate, dissolving the lanthanum oxide in nitric acid with the concentration of 30-35%, wherein the molar ratio of the nitric acid to the lanthanum oxide is 2: 1; obtaining a solution, after the solution is clarified, sequentially adding strontium nitrate and manganese nitrate into the solution, stirring, and simultaneously adding polyethylene glycol, wherein the molar ratio of the polyethylene glycol to the nitric acid is 1: 2, so as to obtain a precursor solution; B. introducing ammonia water as precipitant into titration containerWater and La3+、Sr2+、Mn2 +The molar ratio of the sum of the mole numbers of the metal ions is 1.05: 1; dropwise adding the ammonia water solution in the titration container into the precursor solution obtained in the step A, stirring at the rotation speed of 1200r/min, and precipitating at room temperature for 3 hours to obtain a suspension; C. putting the suspension obtained in the step B into a drying box, and keeping the temperature at 80 ℃ until the suspension is completely precipitated; D. and (4) washing and drying the precipitate obtained in the step (C), and then carrying out heat treatment at 600 ℃ for 3 hours to obtain the powdery nano lanthanum strontium manganese oxide.
Further, the preparation method of the environment-friendly high-new powder material comprises the following steps: (1) weighing aluminum-doped zinc oxide, lanthanum strontium manganese oxide, boron carbide powder, titanium boride powder, amorphous carbon powder and silicon powder according to the weight parts of the formula, putting the materials into a planetary ball mill, adding absolute ethyl alcohol, setting the rotating speed of the ball mill to be 180r/min, and carrying out ball milling for 4.5 hours to obtain mixed slurry; (2) drying the mixed slurry obtained in the step (1) to obtain mixed powder; (3) placing the mixed powder into a plasma activation calcining furnace for calcining, wherein the calcining temperature is set to be 1100 ℃; preserving the heat for 2 hours; (4) cooling to room temperature to obtain the environment-friendly high-new powder material.
Furthermore, the environment-friendly high-new powder material can be used for preparing complex phase ceramic products.
The complex phase ceramic product is prepared from the environment-friendly high-new powder material, and the preparation method of the complex phase ceramic product comprises the following steps: putting the environment-friendly high-tech powder material into a graphite mold for dry pressing and molding, and carrying out cold isostatic pressing treatment under the pressure of 100MPa for 30min to obtain a green body; and then, putting the green body into a graphite vacuum sintering furnace for sintering at 2100 ℃ for 2 hours to obtain the complex phase ceramic product.
The performance characterization result of the obtained environment-friendly high-new powder material is as follows: the melting temperature was 2530 ℃ and the dielectric constant (real part) was 47 and the dielectric constant (imaginary part) was 198 at 300K. The obtained complex phase ceramic product has a true density of 6.7g/cm3The apparent density was 0.61 g/cm3。
In the above embodiments 1 to 3, the dielectric properties of the environment-friendly and highly new powder material are measured by using a dielectric temperature spectrometer, the test fixture is designed according to the international standard astm d150 method, and the parallel plate electrode principle is adopted, and the test electrode is composed of an upper electrode, a lower electrode and a guard electrode. The upper electrode and the lower electrode have good concentricity and parallelism, and the protective electrode can reduce the influence of ambient air capacitance, so that the test data is more accurate and reliable. Preparing a sample before testing, wherein the prepared sample is disc-shaped, and electrodes are plated on two sides of the prepared sample; the size is 20mm in diameter (the diameter of the electrode is 26.8 mm), and the thickness is 5 mm; the surface of the sample needs to be flat and smooth to ensure good contact with the parallel electrodes.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the present invention, and these modifications should also be construed as the protection scope of the present invention.

Claims (10)

1. An environment-friendly high-tech powder material is characterized in that: the environment-friendly high-new powder material is prepared from the following raw materials in parts by weight:
80-100 parts of aluminum-doped zinc oxide
25-35 parts of lanthanum strontium manganese oxide
10-18 parts of titanium diboride
50-60 parts of boron carbide
5-8 parts of carbon black
8-15 parts of silicon powder.
2. The environment-friendly high-tech powder material as claimed in claim 1, wherein: the environment-friendly high-new powder material is prepared from the following raw materials in parts by weight:
100 parts of aluminum-doped zinc oxide
32 parts of lanthanum strontium manganese oxide
15 portions of titanium diboride
56 parts of boron carbide
Carbon black 8 parts
10 parts of silicon powder.
3. The environment-friendly high-tech powder material as claimed in claim 1, wherein: the aluminum-doped zinc oxide is prepared by a hydrothermal synthesis method.
4. The environment-friendly high-tech powder material as claimed in claim 3, wherein: the preparation method of the aluminum-doped zinc oxide comprises the following steps: (a) adding absolute ethyl alcohol into a hydro-thermal synthesis reaction kettle, and slowly adding zinc nitrate and aluminum nitrate while stirring; (b) screwing down the hydro-thermal synthesis reaction kettle, putting the hydro-thermal synthesis reaction kettle into a drying oven, setting the temperature of the drying oven to be 90-120 ℃, and carrying out hydro-thermal reaction for 3 hours; (c) taking out the hydrothermal synthesis reaction kettle, cooling to room temperature, respectively cleaning reaction products by using absolute ethyl alcohol and deionized water, dissolving the reaction products in a small amount of deionized water, performing ultrasonic treatment for 20 minutes, and freeze-drying to obtain aluminum-doped zinc oxide nano powder; (d) calcining the aluminum-doped zinc oxide nano powder obtained in the step (c) for 3 hours in a hydrogen atmosphere at the temperature of 500-600 ℃.
5. The environment-friendly high-tech powder material as claimed in claim 4, wherein: the concentration of the zinc nitrate is 2-4mol/L, the concentration of the aluminum nitrate is 0.05-0.1mol/L, and the molar ratio of the aluminum nitrate to the zinc nitrate is 0.01-0.025: 1.
6. The environment-friendly high-tech powder material as claimed in claim 1, wherein: the lanthanum strontium manganese oxide is a nano lanthanum strontium manganese oxide with the particle size of 30-50nm, and is prepared from raw materials including lanthanum oxide, strontium nitrate, manganese nitrate, nitric acid, polyethylene glycol and ammonia water.
7. The environment-friendly high-tech powder material as claimed in claim 6, wherein: the molar ratio of lanthanum oxide, strontium nitrate and manganese nitrate is 0.3: 0.2: 1.
8. The environment-friendly high-tech powder material as claimed in claim 7, wherein: the specific preparation method of the lanthanum strontium manganese oxide comprises the following steps: A. weighing lanthanum oxide, strontium nitrate and manganese nitrate, dissolving the lanthanum oxide in nitric acid with the concentration of 30-35%, wherein the molar ratio of the nitric acid to the lanthanum oxide is 2: 1; obtaining a solution, after the solution is clarified, sequentially adding strontium nitrate and manganese nitrate into the solution, stirring, and simultaneously adding polyethylene glycol, wherein the molar ratio of the polyethylene glycol to the nitric acid is 1: 2, so as to obtain a precursor solution; B. introducing ammonia water as a precipitator into a titration container, wherein the ammonia water is mixed with La3+、Sr2+、Mn2+The molar ratio of the sum of the mole numbers of the metal ions is 1.05: 1; dropwise adding the ammonia water solution in the titration container into the precursor solution obtained in the step A, stirring at the rotation speed of 400-1000r/min, and precipitating at room temperature for 3-4 hours to obtain a suspension; C. putting the suspension obtained in the step B into a drying oven, and keeping the temperature at 80-90 ℃ until the suspension is completely precipitated; D. and (4) washing and drying the precipitate obtained in the step (C), and then carrying out heat treatment at 600-700 ℃ for 2-3 hours to obtain the powdery nano lanthanum strontium manganese oxide.
9. The method for preparing the environment-friendly high-new powder material according to any one of claims 1 to 8, characterized in that: the method comprises the following steps:
(1) weighing aluminum-doped zinc oxide, lanthanum strontium manganese oxide, boron carbide powder, titanium boride powder, amorphous carbon powder and silicon powder according to the weight parts of the formula, putting the materials into a planetary ball mill, adding absolute ethyl alcohol, setting the rotating speed of the ball mill to be 100-inch and 200r/min, and carrying out ball milling for 4-5h to obtain mixed slurry; (2) drying the mixed slurry obtained in the step (1) to obtain mixed powder; (3) placing the mixed powder into a plasma activation calcining furnace for calcining, wherein the calcining temperature is set to be 1000-1200 ℃; preserving the heat for 1-2 h; (4) cooling to room temperature to obtain the environment-friendly high-new powder material.
10. A composite ceramic product characterized by: is prepared from the environment-friendly high-new powder material as claimed in any one of claims 1 to 9, and the preparation method of the complex phase ceramic product comprises the following steps: putting the environment-friendly high-tech powder material into a graphite mold for dry pressing and molding, and carrying out cold isostatic pressing treatment under the pressure of 100MPa for 30min to obtain a green body; and then placing the green body into a graphite vacuum sintering furnace for sintering at the sintering temperature of 2000-2150 ℃ for 2-3h to obtain the complex phase ceramic product.
CN202011492732.9A 2020-12-16 2020-12-16 Environment-friendly high-new powder material and preparation method thereof Withdrawn CN112456540A (en)

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