Metal and porous ceramic dual-phase composite material and preparation method therefor, atomizer and electronic atomization device

Abstract

Disclosed in the present application are a metal and porous ceramic dual-composite-phase composite material and a preparation method therefor. The metal and porous ceramic dual-composite-phase composite material comprises the following components per 100 parts by weight: 35-50 parts of a quartz powder or an alumina ceramic powder; 3-6 parts of a sintering aid; 3-8 parts of a metal alloy powder; 3-5 parts of an Si powder and / or a boron powder; 8-15 parts of a low-temperature glass powder; 25-40 parts of an inorganic pore-forming agent, which is SiO2-Al2O3 hollow microspheres; and 5-7 parts of a polyvinyl alcohol aqueous solution.

Description

Metal and porous ceramic dual-phase composite material, preparation method thereof, atomizer and electronic atomization device

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on June 12, 2023, with application number 202310690788.2 and invention name “A metal and porous ceramic dual-phase composite material and its preparation method”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The present application relates to the field of atomizers, and in particular to a metal and porous ceramic dual-phase composite material and a preparation method thereof, an atomizer, and an electronic atomization device. Background Art

[0003] In the atomizer structure, the atomizer core is a very critical component. Currently, the atomizer core often uses porous ceramic materials as the base, and a heating film is set on the base. The heating film heats the atomization matrix absorbed by the base to achieve the atomization effect.

[0004] Natural diatomaceous earth has a large number of pore structures, among which mesopores and macropores have strong adsorption properties and are often used as the main material for porous ceramic substrates of atomizer cores. At present, the main method for preparing porous ceramics is to use diatomaceous earth as the main body and add a certain amount of binder and pore-forming agent for sintering. However, porous ceramics prepared from diatomaceous earth have low strength, high sintering temperature, poor membrane-base bonding and short life. In addition, most existing porous ceramics use organic pore-forming agents for pore formation, which are easy to decompose and volatilize toxic decomposition products during the debinding process. The particle size distribution of the pore-forming agent also has a large range, resulting in uneven pore size distribution after pore formation, and more closed pores and fewer through pores, which affects the use effect of the atomizer core.

[0005] Summary of the Invention

[0006] In a first aspect, the present application provides a metal and porous ceramic dual-phase composite material, comprising the following components per 100 parts by weight:

[0007] 35-50 parts of ultrafine quartz powder or alumina ceramic powder;

[0008] 3-6 parts of sintering aid;

[0009] 3-8 parts of metal alloy powder;

[0010] 3-5 parts of Si powder and / or boron powder;

[0011] 8-15 parts of low-temperature glass powder;

[0012] 25-40 parts of an inorganic pore-forming agent, wherein the inorganic pore-forming agent is SiO2-Al2O3 hollow microspheres;

[0013] 5-7 parts of polyvinyl alcohol aqueous solution, wherein the mass concentration of the polyvinyl alcohol aqueous solution is 0.9-1.0%.

[0014] The inorganic pore-forming agent avoids the problem that the organic pore-forming agent is prone to produce toxic decomposition products during the debinding process, the debinding process is also long and costly. The pores are formed by the self-foaming of the hollow microspheres during the high-temperature sintering process, which can greatly shorten the debinding process, is more economical and environmentally friendly, and the obtained metal and porous ceramic dual-composite phase composite material has a higher ratio of through holes and a larger porosity.

[0015] Optionally, the SiO2 content in the ultrafine quartz powder is greater than 99%, and the mesh size of the ultrafine quartz powder is less than 300 meshes.

[0016] Optionally, the purity of the alumina ceramic powder is greater than 99%, and the mesh size of the alumina ceramic powder is less than 300 meshes.

[0017] Optionally, the sintering aid is selected from at least one of CaF2 and CaCO3. The addition of the sintering aid can significantly reduce the sintering temperature of quartz sand or alumina.

[0018] Optionally, the metal alloy powder is selected from one of nickel-iron alloy powder and iron-chromium alloy powder; the mesh size of the metal alloy powder is 300-400 mesh.

[0019] By adding nickel-iron alloy powder or iron-chromium alloy powder to ceramic powder, a metal phase is formed inside the ceramic, and the three-dimensional skeleton in the matrix is ​​composed of ceramic phase and metal phase. Compared with a single ceramic phase, the formation of the metal phase changes the original thermal conductivity and thermal expansion coefficient of the ceramic matrix, so that the performance of the metallized composite material is transformed from the typical brittleness and hardness of the ceramic phase to the toughness of the metal phase, which not only brings a significant improvement in the comprehensive mechanical properties, but also transforms the original mechanical adhesion between the heating film and the matrix into a metallurgical bond. The huge difference in thermal expansion coefficient between the single ceramic phase and the heating film causes the matrix to break during atomization, while the changes in the thermal conductivity and thermal expansion coefficient of the composite material can better match the heating film and the metallurgical bonding layer formed with the heating film, which can significantly improve the lifespan.

[0020] Optionally, the metal alloy powder is nickel-iron alloy powder, and the Ni content in the nickel-iron alloy powder is 50-65 wt.%.

[0021] Optionally, when the metal alloy powder is an iron-chromium alloy powder, the Cr content in the iron-chromium alloy powder is 50-65 wt.%.

[0022] Optionally, the Si powder and / or boron powder are both in granular or powder form, with a mesh size of 300-400. The Si powder and / or boron powder can improve the compatibility between the metal alloy powder and the ceramic.

[0023] Optionally, the Si powder and / or boron powder is preferably Si powder and boron powder, which form a NiFeBSi amorphous alloy metal phase or a CrFeBSi amorphous alloy metal phase with nickel-iron alloy powder or iron-chromium alloy powder during high-temperature sintering and are connected to the matrix through non-covalent bonds and covalent bonds. After sintering, a continuous metal phase is formed in the three-dimensional skeleton of the porous ceramic. The metal phase and the ceramic phase are interactively combined to form a three-dimensional network skeleton structure of the porous ceramic, which can greatly improve the strength and toughness of the ceramic matrix. At the same time, due to the existence of the continuous metal phase after co-firing, a stable metallurgical bond can be formed between the heating layer and the matrix during subsequent thick film printing or thin film coating, thereby improving the life of the heating film and also meeting the requirements of high-power atomization for the overall atomization core.

[0024] Optionally, the low-temperature glass powder has a softening point of 700-900°C.

[0025] In a second aspect, the present application proposes a method for preparing a metal and porous ceramic dual-phase composite material, comprising the following steps:

[0026] S1, pretreatment and powder mixing; high-purity quartz sand or alumina ceramic is dry-milled and then passed through a 300-mesh sieve to obtain ultrafine quartz powder or alumina ceramic powder, and a sintering aid, metal alloy powder, Si powder or boron powder, low-temperature glass powder and an inorganic pore-forming agent are added to the ultrafine quartz powder or alumina ceramic powder, and then the mixture is thoroughly mixed by low-speed ball milling to obtain a mixed powder; the mass fraction of SiO2 in the high-purity quartz sand is greater than 99%, the purity of the alumina ceramic is greater than 99%, and the inorganic pore-forming agent is SiO2-Al2O3 hollow microspheres; the steel balls used in the dry ball milling are zirconia balls, and the material-to-ball ratio is 1:(0.5-1);

[0027] S2, porous ceramic forming; the mixed powder is mixed with a polyvinyl alcohol aqueous solution, stirred and mixed evenly, and then formed by dry pressing to obtain a ceramic green body; the dry pressing pressure is 400-600MPa, and the holding time is 5-10min;

[0028] S3, sintering molding; drying the ceramic green body at 70-90 ° C for 4-6 hours, and then sintering at a vacuum degree of 1×10 -1 The temperature is raised at a rate of less than 5°C / min in a vacuum program temperature-controlled furnace below Pa, kept at 1100-1200°C for 0.5-1h, and cooled to room temperature along with the furnace to obtain a metal and porous ceramic dual-phase composite material.

[0029] In a third aspect, the present application provides an atomizer, comprising a porous ceramic substrate and a heating element bonded to the porous ceramic substrate, wherein the porous ceramic substrate comprises the following components in parts by weight:

[0030] 35-50 parts of quartz powder or alumina ceramic powder;

[0031] 3-6 parts of burning aid;

[0032] 3-8 parts of metal alloy powder;

[0033] 3-5 parts of Si powder and / or boron powder;

[0034] 8-15 parts of low-temperature glass powder;

[0035] 25-40 parts of an inorganic pore-forming agent, wherein the inorganic pore-forming agent is SiO2-Al2O3 hollow microspheres.

[0036] In a fourth aspect, the present application proposes an electronic atomization device, which includes the above-mentioned atomizer and a power supply component for providing power to the atomizer.

[0037] The beneficial effects of this application are:

[0038] (1) The present application combines porous ceramic materials with metal alloy powders, thereby significantly improving the strength of the metallized porous ceramic materials and meeting the manufacturing and assembly requirements under various composite stress conditions;

[0039] (2) The metal and porous ceramic dual-phase composite material prepared in this application forms a metallurgical bond with the heating layer of thick film printing and thin film coating, which greatly improves the life of the atomizer core and also meets the requirements of high-power atomization;

[0040] (3) The metal and porous ceramic dual-phase composite material of the present application has a porosity of 50-70%, a pore size of 15-45 μm, and a flexural strength of 170-250 MPa;

[0041] (4) This application uses inorganic pore-forming agents instead of organic pore-forming agents, which is more environmentally friendly and improves efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] FIG1 is a process diagram of a preparation method of a metal and porous ceramic dual-phase composite material provided in an embodiment of the present application. DETAILED DESCRIPTION

[0043] It will be understood that when used in this specification and the appended claims, the terms “comprises” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof.

[0044] In order to more fully understand the technical content of this application, the technical solution of this application is further introduced and explained in conjunction with specific embodiments below.

[0045] The present application proposes a metal and porous ceramic dual-phase composite material, which comprises the following components per 100 parts by weight:

[0046] 35-50 parts of ultrafine quartz powder or alumina ceramic powder;

[0047] 3-6 parts of sintering aid;

[0048] 3-8 parts of metal alloy powder;

[0049] 3-5 parts of Si powder and / or boron powder;

[0050] 8-15 parts of low-temperature glass powder;

[0051] 25-40 parts of an inorganic pore-forming agent, wherein the inorganic pore-forming agent is SiO2-Al2O3 hollow microspheres;

[0052] 5-7 parts of polyvinyl alcohol aqueous solution, wherein the mass concentration of the polyvinyl alcohol aqueous solution is 0.9-1.0%.

[0053] The present application also provides a method for preparing a metal and porous ceramic dual-phase composite material, comprising the following steps:

[0054] S1, pretreatment and powder mixing: adding a sintering aid, metal alloy powder, Si powder or boron powder, low-temperature glass powder and an inorganic pore-forming agent to ultrafine quartz powder or alumina ceramic powder, and then performing low-speed ball milling to fully mix to obtain a mixed powder;

[0055] S2, porous ceramic forming; the mixed powder is mixed with a polyvinyl alcohol aqueous solution, stirred and mixed evenly, and then formed by dry pressing to obtain a ceramic green body; the dry pressing pressure is 400-600MPa, and the holding time is 5-10min;

[0056] S3, sintering molding; drying the ceramic green body at 70-90 ° C for 4-6 hours, and then sintering at a vacuum degree of 1×10 -1 The temperature is raised at a rate of less than 5°C / min in a vacuum program temperature-controlled furnace below Pa, kept at 1100-1200°C for 0.5-1h, and cooled to room temperature along with the furnace to obtain a metal and porous ceramic dual-phase composite material.

[0057] In some embodiments, the ultrafine quartz powder is prepared by dry-milling high-purity quartz sand with a SiO2 mass fraction of 99% for 2 hours, and passing the mixture through a 300-mesh sieve to obtain the ultrafine quartz powder.

[0058] In some embodiments, the preparation method of ultrafine alumina ceramic powder is as follows: dry-milling alumina ceramic with a purity of 99% for 2 hours, and passing the mixture through a 300-mesh sieve to obtain ultrafine alumina ceramic powder.

[0059] In some embodiments, the metal alloy powder is selected from one of nickel-iron alloy powder and iron-chromium alloy powder; and the mesh size of the metal alloy powder is 300-400 mesh.

[0060] In some embodiments, the metal alloy powder is nickel-iron alloy powder, and the Ni content in the nickel-iron alloy powder is 50-65 wt.%.

[0061] In some embodiments, when the metal alloy powder is an iron-chromium alloy powder, the Cr content in the iron-chromium alloy powder is 50-65 wt.%.

[0062] In some embodiments, the sintering aid is selected from at least one of CaF2 and CaCO3.

[0063] In some embodiments, the SiO2-Al2O3 hollow microspheres have a diameter of 100-200 μm and an impurity content of less than 1%.

[0064] In some embodiments, the low-temperature glass powder has a softening point of 700-900°C.

[0065] In some embodiments, the steel balls used in the dry ball milling are zirconia balls, and the material-to-ball ratio is 1:(0.5-1).

[0066] An embodiment of the present application further provides an atomizer, comprising a porous ceramic substrate and a heating element coupled to the porous ceramic substrate. The porous ceramic substrate comprises the following components in parts by weight:

[0067] 35-50 parts of quartz powder or alumina ceramic powder;

[0068] 3-6 parts of burning aid;

[0069] 3-8 parts of metal alloy powder;

[0070] 3-5 parts of Si powder and / or boron powder;

[0071] 8-15 parts of low-temperature glass powder;

[0072] 25-40 parts of an inorganic pore-forming agent, wherein the inorganic pore-forming agent is SiO2-Al2O3 hollow microspheres.

[0073] An embodiment of the present application further provides an electronic atomization device, which includes the above-mentioned atomizer and a power supply component for providing power to the atomizer.

[0074] The examples and comparative examples provided in this application are as follows:

[0075] Example 1

[0076] A metal and porous ceramic dual-phase composite material, comprising the following components per 100 parts by weight:

[0077] 40 parts of ultrafine quartz powder;

[0078] 5 parts of sintering aid CaF2;

[0079] 4 parts of nickel-iron alloy powder, wherein the nickel content of the nickel-iron alloy powder is 50 wt.%;

[0080] 3 parts of Si powder;

[0081] 8 parts of low-temperature glass powder, wherein the softening point of the low-temperature glass powder is 900°C;

[0082] 35 parts of an inorganic pore-forming agent, wherein the inorganic pore-forming agent is SiO2-Al2O3 hollow microspheres with a diameter of 100 μm;

[0083] 5 parts of polyvinyl alcohol aqueous solution, wherein the mass concentration of the polyvinyl alcohol aqueous solution is 1.0%.

[0084] A method for preparing a metal and porous ceramic dual-phase composite material comprises the following steps:

[0085] 1. Pretreatment and powder mixing;

[0086] The above-mentioned ultrafine quartz powder, sintering aid CaF2, nickel-iron alloy powder, Si powder, low-temperature glass powder and inorganic pore-forming agent are mixed, and after being fully mixed by low-speed ball milling, a mixed powder is obtained; the mesh size of the sintering aid CaF2, nickel-iron alloy powder, Si powder and low-temperature glass powder is 300 mesh.

[0087] 2. Porous ceramic molding;

[0088] The mixed powder is mixed with a polyvinyl alcohol aqueous solution, stirred and mixed evenly, and then formed by dry pressing to obtain a ceramic green body;

[0089] 3. Low temperature sintering;

[0090] The ceramic green body was dried in a drying oven at 85°C for 4 hours, then heated at a rate of 5°C / min in a vacuum program temperature-controlled furnace to 1150°C and kept at that temperature for 1 hour. The metal and porous ceramic dual-phase composite material was obtained by cooling the furnace to room temperature.

[0091] Example 2

[0092] A metal and porous ceramic dual-phase composite material, comprising the following components per 100 parts by weight:

[0093] 40 parts of ultrafine quartz powder;

[0094] 3 parts of sintering aid CaF2;

[0095] 8 parts of nickel-iron alloy powder, wherein the nickel content of the nickel-iron alloy powder is 50 wt.%;

[0096] 3 parts of Si powder;

[0097] 8 parts of low-temperature glass powder;

[0098] 32 parts of an inorganic pore-forming agent, wherein the inorganic pore-forming agent is SiO2-Al2O3 hollow microspheres with a diameter of 100 μm;

[0099] 6 parts of polyvinyl alcohol aqueous solution, wherein the mass concentration of the polyvinyl alcohol aqueous solution is 1.0%.

[0100] A method for preparing a metal and porous ceramic dual-phase composite material comprises the following steps:

[0101] 1. Pretreatment and powder mixing;

[0102] The above-mentioned ultrafine quartz powder, sintering aid CaF2, nickel-iron alloy powder, Si powder, low-temperature glass powder and inorganic pore-forming agent are mixed, and after being fully mixed by low-speed ball milling, a mixed powder is obtained; the mesh size of the sintering aid CaF2, nickel-iron alloy powder, Si powder and low-temperature glass powder is 300 mesh.

[0103] 2. Porous ceramic molding;

[0104] The mixed powder is mixed with a polyvinyl alcohol aqueous solution, stirred and mixed evenly, and then formed by dry pressing to obtain a ceramic green body;

[0105] 3. Low temperature sintering;

[0106] The ceramic green body was dried in a drying oven at 85°C for 4 hours, then heated at a rate of 5°C / min in a vacuum program temperature-controlled furnace to 1150°C and kept at that temperature for 1 hour. The metal and porous ceramic dual-phase composite material was obtained by cooling the furnace to room temperature.

[0107] Example 3

[0108] A metal and porous ceramic dual-phase composite material, comprising the following components per 100 parts by weight:

[0109] 35 parts of ultrafine alumina ceramic powder;

[0110] 3 parts of sintering aid CaCO3;

[0111] 6 parts of ferrochromium alloy powder, wherein the Cr content in the ferrochromium alloy powder is 65 wt.%;

[0112] 3 parts of boron powder;

[0113] 8 parts of low-temperature glass powder;

[0114] 40 parts of an inorganic pore-forming agent, wherein the inorganic pore-forming agent is SiO2-Al2O3 hollow microspheres with a diameter of 100 μm;

[0115] 5 parts of polyvinyl alcohol aqueous solution, wherein the mass concentration of the polyvinyl alcohol aqueous solution is 1.0%.

[0116] A method for preparing a metal and porous ceramic dual-phase composite material comprises the following steps:

[0117] 1. Pretreatment and powder mixing;

[0118] The above-mentioned ultrafine oxidation furnace ceramic powder, sintering aid CaCO3, nickel-iron alloy powder, boron powder, low-temperature glass powder and inorganic pore-forming agent are mixed, and after being fully mixed by low-speed ball milling, a mixed powder is obtained; the mesh size of the sintering aid CaCO3, nickel-iron alloy powder, boron powder and low-temperature glass powder is 400 mesh.

[0119] 2. Porous ceramic molding;

[0120] The mixed powder is mixed with a polyvinyl alcohol aqueous solution, stirred and mixed evenly, and then formed by dry pressing to obtain a ceramic green body;

[0121] 3. Low temperature sintering;

[0122] The ceramic green body was dried in a drying oven at 90°C for 4 hours, then heated in a vacuum program temperature-controlled furnace at a rate of 5°C / min to 1100°C and kept at that temperature for 1 hour, and then cooled to room temperature to obtain a metal and porous ceramic dual-phase composite material.

[0123] Example 4

[0124] A metal and porous ceramic dual-phase composite material, comprising the following components per 100 parts by weight:

[0125] 50 parts of ultrafine alumina ceramic powder;

[0126] 6 parts of sintering aid CaCO3;

[0127] 3 parts of ferrochromium alloy powder, wherein the Cr content in the ferrochromium alloy powder is 58 wt.%;

[0128] 3 parts of boron powder;

[0129] 8 parts of low-temperature glass powder;

[0130] 25 parts of an inorganic pore-forming agent, wherein the inorganic pore-forming agent is SiO2-Al2O3 hollow microspheres with a diameter of 200 μm;

[0131] 5 parts of polyvinyl alcohol aqueous solution, wherein the mass concentration of the polyvinyl alcohol aqueous solution is 0.9%.

[0132] A method for preparing a metal and porous ceramic dual-phase composite material comprises the following steps:

[0133] 1. Pretreatment and powder mixing;

[0134] The above-mentioned ultrafine alumina ceramic powder, sintering aid CaCO3, nickel-iron alloy powder, boron powder, low-temperature glass powder and inorganic pore-forming agent are mixed, and after being fully mixed by low-speed ball milling, a mixed powder is obtained; the mesh size of the sintering aid CaCO3, nickel-iron alloy powder, boron powder and low-temperature glass powder is 300 mesh.

[0135] 2. Porous ceramic molding;

[0136] The mixed powder is mixed with a polyvinyl alcohol aqueous solution, stirred and mixed evenly, and then formed by dry pressing to obtain a ceramic green body;

[0137] 3. Low temperature sintering;

[0138] The ceramic green body was dried in a drying oven at 70°C for 6 hours, then heated in a vacuum program temperature-controlled furnace at a rate of 5°C / min to 1200°C and kept at that temperature for 0.5 hours. The metal and porous ceramic dual-phase composite material was obtained by cooling the furnace to room temperature.

[0139] Example 5

[0140] A metal and porous ceramic dual-phase composite material, comprising the following components per 100 parts by weight:

[0141] 40 parts of ultrafine alumina ceramic powder;

[0142] 3 parts of sintering aid CaF2;

[0143] 5 parts of nickel-iron alloy powder, wherein the nickel content of the nickel-iron alloy powder is 50 wt.%;

[0144] 4 parts of Si powder;

[0145] 15 parts of low-temperature glass powder;

[0146] 28 parts of an inorganic pore-forming agent, wherein the inorganic pore-forming agent is SiO2-Al2O3 hollow microspheres with a diameter of 150 μm;

[0147] 5 parts of polyvinyl alcohol aqueous solution, wherein the mass concentration of the polyvinyl alcohol aqueous solution is 0.95%.

[0148] A method for preparing a metal and porous ceramic dual-phase composite material comprises the following steps:

[0149] 1. Pretreatment and powder mixing;

[0150] The above-mentioned ultrafine quartz powder, sintering aid CaF2, nickel-iron alloy powder, Si powder, low-temperature glass powder and inorganic pore-forming agent are mixed, and after being fully mixed by low-speed ball milling, a mixed powder is obtained; the mesh size of the sintering aid CaF2, nickel-iron alloy powder, Si powder and low-temperature glass powder is 300 mesh.

[0151] 2. Porous ceramic molding;

[0152] The mixed powder is mixed with a polyvinyl alcohol aqueous solution, stirred and mixed evenly, and then formed by dry pressing to obtain a ceramic green body;

[0153] 3. Low temperature sintering;

[0154] The ceramic green body was dried in a drying oven at 85°C for 5 h, then heated at a rate of 5°C / min in a vacuum program temperature-controlled furnace to 1150°C and kept at that temperature for 0.75 h. The metal and porous ceramic dual-phase composite material was obtained by cooling the furnace to room temperature.

[0155] Example 6

[0156] A metal and porous ceramic dual-phase composite material, comprising the following components per 100 parts by weight:

[0157] 40 parts of ultrafine alumina ceramic powder;

[0158] 5 parts of sintering aid CaF2;

[0159] 5 parts of nickel-iron alloy powder, wherein the nickel content of the nickel-iron alloy powder is 50 wt.%;

[0160] 3 parts of Si powder;

[0161] 10 parts of low-temperature glass powder;

[0162] 30 parts of an inorganic pore-forming agent, wherein the inorganic pore-forming agent is SiO2-Al2O3 hollow microspheres with a diameter of 150 μm;

[0163] 5 parts of polyvinyl alcohol aqueous solution, wherein the mass concentration of the polyvinyl alcohol aqueous solution is 0.95%.

[0164] A method for preparing a metal and porous ceramic dual-phase composite material comprises the following steps:

[0165] 1. Pretreatment and powder mixing;

[0166] The above-mentioned ultrafine quartz powder, sintering aid CaF2, nickel-iron alloy powder, Si powder, low-temperature glass powder and inorganic pore-forming agent are mixed, and after being fully mixed by low-speed ball milling, a mixed powder is obtained; the mesh size of the sintering aid CaF2, nickel-iron alloy powder, Si powder and low-temperature glass powder is 300 mesh.

[0167] 2. Porous ceramic molding;

[0168] The mixed powder is mixed with a polyvinyl alcohol aqueous solution, stirred and mixed evenly, and then formed by dry pressing to obtain a ceramic green body;

[0169] 3. Low temperature sintering;

[0170] The ceramic green body was dried in a drying oven at 85°C for 5 h, then heated at a rate of 5°C / min in a vacuum program temperature-controlled furnace to 1150°C and kept at that temperature for 0.75 h. The metal and porous ceramic dual-phase composite material was obtained by cooling the furnace to room temperature.

[0171] Example 7

[0172] A metal and porous ceramic dual-phase composite material, comprising the following components per 100 parts by weight:

[0173] 40 parts of ultrafine quartz powder;

[0174] 6 parts of sintering aid CaF2;

[0175] 4 parts of nickel-iron alloy powder, wherein the nickel content of the nickel-iron alloy powder is 50 wt.%;

[0176] 3 parts of Si powder;

[0177] 2 parts of boron powder;

[0178] 8 parts of low-temperature glass powder;

[0179] 30 parts of an inorganic pore-forming agent, wherein the inorganic pore-forming agent is SiO2-Al2O3 hollow microspheres with a diameter of 100 μm;

[0180] 7 parts of polyvinyl alcohol aqueous solution, wherein the mass concentration of the polyvinyl alcohol aqueous solution is 1.0%.

[0181] A method for preparing a metal and porous ceramic dual-phase composite material comprises the following steps:

[0182] 1. Pretreatment and powder mixing;

[0183] The above-mentioned ultrafine quartz powder, sintering aid CaF2, nickel-iron alloy powder, Si powder, boron powder, low-temperature glass powder and inorganic pore-forming agent are mixed, and after being fully mixed by low-speed ball milling, a mixed powder is obtained; the mesh size of the sintering aid CaF2, nickel-iron alloy powder, Si powder, boron powder and low-temperature glass powder is 300 mesh.

[0184] 2. Porous ceramic molding;

[0185] The mixed powder is mixed with a polyvinyl alcohol aqueous solution, stirred and mixed evenly, and then formed by dry pressing to obtain a ceramic green body;

[0186] 3. Low temperature sintering;

[0187] The ceramic green body was dried in a drying oven at 85°C for 4 hours, then heated at a rate of 5°C / min in a vacuum program temperature-controlled furnace to 1150°C and kept at that temperature for 1 hour. The metal and porous ceramic dual-phase composite material was obtained by cooling the furnace to room temperature.

[0188] Comparative Examples 1-8 are set as follows based on Example 1:

[0189] Comparative Example 1

[0190] A metal and porous ceramic dual-phase composite material, comprising the following components per 100 parts by weight:

[0191] 40 parts of diatomaceous earth;

[0192] 5 parts of sintering aid CaF2;

[0193] 4 parts of nickel-iron alloy powder, wherein the nickel content of the nickel-iron alloy powder is 50 wt.%;

[0194] 3 parts of Si powder;

[0195] 8 parts of low-temperature glass powder;

[0196] 35 parts of an inorganic pore-forming agent, wherein the inorganic pore-forming agent is SiO2-Al2O3 hollow microspheres with a diameter of 100 μm;

[0197] 5 parts of polyvinyl alcohol aqueous solution, wherein the mass concentration of the polyvinyl alcohol aqueous solution is 1.0%.

[0198] A method for preparing a metal and porous ceramic dual-phase composite material comprises the following steps:

[0199] 1. Pretreatment and powder mixing;

[0200] The diatomaceous earth, sintering aid CaF2, nickel-iron alloy powder, Si powder, low-temperature glass powder and inorganic pore-forming agent are mixed and fully mixed by low-speed ball milling to obtain a mixed powder; the mesh size of the sintering aid CaF2, nickel-iron alloy powder, Si powder and low-temperature glass powder is 300 mesh.

[0201] 2. Porous ceramic molding;

[0202] The mixed powder is mixed with a polyvinyl alcohol aqueous solution, stirred and mixed evenly, and then formed by dry pressing to obtain a ceramic green body;

[0203] 3. Low temperature sintering;

[0204] The ceramic green body was dried in a drying oven at 85°C for 4 hours, then heated at a rate of 5°C / min in a vacuum program temperature-controlled furnace to 1150°C and kept at that temperature for 1 hour. The metal and porous ceramic dual-phase composite material was obtained by cooling the furnace to room temperature.

[0205] Comparative Example 2

[0206] A metal and porous ceramic dual-phase composite material, comprising the following components per 100 parts by weight:

[0207] 40 parts of ultrafine quartz powder;

[0208] 5 parts of sintering aid CaF2;

[0209] 3 parts of Si powder;

[0210] 8 parts of low-temperature glass powder;

[0211] 39 parts of an inorganic pore-forming agent, wherein the inorganic pore-forming agent is SiO2-Al2O3 hollow microspheres with a diameter of 100 μm;

[0212] 5 parts of polyvinyl alcohol aqueous solution, wherein the mass concentration of the polyvinyl alcohol aqueous solution is 1.0%.

[0213] A method for preparing a metal and porous ceramic dual-phase composite material comprises the following steps:

[0214] 1. Pretreatment and powder mixing;

[0215] The ultrafine quartz powder, sintering aid CaF2, Si powder, low-temperature glass powder and inorganic pore-forming agent are mixed and fully mixed by low-speed ball milling to obtain a mixed powder; the mesh size of the sintering aid CaF2, Si powder and low-temperature glass powder is 300 mesh.

[0216] 2. Porous ceramic molding;

[0217] The mixed powder is mixed with a polyvinyl alcohol aqueous solution, stirred and mixed evenly, and then formed by dry pressing to obtain a ceramic green body;

[0218] 3. Low temperature sintering;

[0219] The ceramic green body was dried in a drying oven at 85°C for 4 hours, then heated at a rate of 5°C / min in a vacuum program temperature-controlled furnace to 1150°C and kept at that temperature for 1 hour. The metal and porous ceramic dual-phase composite material was obtained by cooling the furnace to room temperature.

[0220] Comparative Example 3

[0221] A metal and porous ceramic dual-phase composite material, comprising the following components per 100 parts by weight:

[0222] 40 parts of ultrafine quartz powder;

[0223] 5 parts of sintering aid CaF2;

[0224] 4 parts of nickel-iron alloy powder, wherein the nickel content of the nickel-iron alloy powder is 50 wt.%;

[0225] 8 parts of low-temperature glass powder;

[0226] 39 parts of an inorganic pore-forming agent, wherein the inorganic pore-forming agent is SiO2-Al2O3 hollow microspheres with a diameter of 100 μm;

[0227] 5 parts of polyvinyl alcohol aqueous solution, wherein the mass concentration of the polyvinyl alcohol aqueous solution is 1.0%.

[0228] A method for preparing a metal and porous ceramic dual-phase composite material comprises the following steps:

[0229] 1. Pretreatment and powder mixing;

[0230] The ultrafine quartz powder, sintering aid CaF2, nickel-iron alloy powder, low-temperature glass powder and inorganic pore-forming agent are mixed, and the mixed powder is obtained after being fully mixed by low-speed ball milling; the mesh size of the sintering aid CaF2, nickel-iron alloy powder and low-temperature glass powder is 300 mesh.

[0231] 2. Porous ceramic molding;

[0232] The mixed powder is mixed with a polyvinyl alcohol aqueous solution, stirred and mixed evenly, and then formed by dry pressing to obtain a ceramic green body;

[0233] 3. Low temperature sintering;

[0234] The ceramic green body was dried in a drying oven at 85°C for 4 hours, then heated at a rate of 5°C / min in a vacuum program temperature-controlled furnace to 1150°C and kept at that temperature for 1 hour. The metal and porous ceramic dual-phase composite material was obtained by cooling the furnace to room temperature.

[0235] Comparative Example 4

[0236] A metal and porous ceramic dual-phase composite material, comprising the following components per 100 parts by weight:

[0237] 40 parts of ultrafine quartz powder;

[0238] 5 parts of sintering aid CaF2;

[0239] 4 parts of nickel-iron alloy powder, wherein the nickel content of the nickel-iron alloy powder is 50 wt.%;

[0240] 3 parts of Si powder;

[0241] 8 parts of low-temperature glass powder;

[0242] 35 parts of polystyrene;

[0243] 5 parts of polyvinyl alcohol aqueous solution, wherein the mass concentration of the polyvinyl alcohol aqueous solution is 1.0%.

[0244] A method for preparing a metal and porous ceramic dual-phase composite material comprises the following steps:

[0245] 1. Pretreatment and powder mixing;

[0246] The above-mentioned ultrafine quartz powder, sintering aid CaF2, nickel-iron alloy powder, Si powder, low-temperature glass powder and polystyrene are mixed, and after being fully mixed by low-speed ball milling, a mixed powder is obtained; the mesh size of the sintering aid CaF2, nickel-iron alloy powder, Si powder and low-temperature glass powder is 300 mesh.

[0247] 2. Porous ceramic molding;

[0248] The mixed powder is mixed with a polyvinyl alcohol aqueous solution, stirred and mixed evenly, and then formed by dry pressing to obtain a ceramic green body;

[0249] 3. Low temperature sintering;

[0250] The ceramic green body was dried in a drying oven at 85°C for 4 hours, then heated at a rate of 5°C / min in a vacuum program temperature-controlled furnace to 1150°C and kept at that temperature for 1 hour. The metal and porous ceramic dual-phase composite material was obtained by cooling the furnace to room temperature.

[0251] Comparative Example 5

[0252] A metal and porous ceramic dual-phase composite material, comprising the following components per 100 parts by weight:

[0253] 40 parts of ultrafine quartz powder;

[0254] 5 parts of sintering aid CaF2;

[0255] 4 parts of nickel-iron alloy powder, wherein the nickel content of the nickel-iron alloy powder is 50 wt.%;

[0256] 3 parts of Si powder;

[0257] 8 parts of low-temperature glass powder;

[0258] 35 parts of polymethyl methacrylate;

[0259] 5 parts of polyvinyl alcohol aqueous solution, wherein the mass concentration of the polyvinyl alcohol aqueous solution is 1.0%.

[0260] A method for preparing a metal and porous ceramic dual-phase composite material comprises the following steps:

[0261] 1. Pretreatment and powder mixing;

[0262] The above-mentioned ultrafine quartz powder, sintering aid CaF2, nickel-iron alloy powder, Si powder, low-temperature glass powder and polymethyl methacrylate are mixed, and after being fully mixed by low-speed ball milling, a mixed powder is obtained; the mesh size of the sintering aid CaF2, nickel-iron alloy powder, Si powder and low-temperature glass powder is 300 mesh.

[0263] 2. Porous ceramic molding;

[0264] The mixed powder is mixed with a polyvinyl alcohol aqueous solution, stirred and mixed evenly, and then formed by dry pressing to obtain a ceramic green body;

[0265] 3. Low temperature sintering;

[0266] The ceramic green body was dried in a drying oven at 85°C for 4 hours, then heated at a rate of 5°C / min in a vacuum program temperature-controlled furnace to 1150°C and kept at that temperature for 1 hour. The metal and porous ceramic dual-phase composite material was obtained by cooling the furnace to room temperature.

[0267] Comparative Example 6

[0268] A metal and porous ceramic dual-phase composite material, comprising the following components per 100 parts by weight:

[0269] 50 parts of ultrafine quartz powder;

[0270] 6 parts of sintering aid CaF2;

[0271] 8 parts of nickel-iron alloy powder, wherein the nickel content of the nickel-iron alloy powder is 50 wt.%;

[0272] 3 parts of Si powder;

[0273] 8 parts of low-temperature glass powder, wherein the softening point of the low-temperature glass powder is 900°C;

[0274] 20 parts of an inorganic pore-forming agent, wherein the inorganic pore-forming agent is SiO2-Al2O3 hollow microspheres with a diameter of 100 μm;

[0275] 5 parts of polyvinyl alcohol aqueous solution, wherein the mass concentration of the polyvinyl alcohol aqueous solution is 1.0%.

[0276] A method for preparing a metal and porous ceramic dual-phase composite material comprises the following steps:

[0277] 1. Pretreatment and powder mixing;

[0278] The above-mentioned ultrafine quartz powder, sintering aid CaF2, nickel-iron alloy powder, Si powder, low-temperature glass powder and inorganic pore-forming agent are mixed, and after being fully mixed by low-speed ball milling, a mixed powder is obtained; the mesh size of the sintering aid CaF2, nickel-iron alloy powder, Si powder and low-temperature glass powder is 300 mesh.

[0279] 2. Porous ceramic molding;

[0280] The mixed powder is mixed with a polyvinyl alcohol aqueous solution, stirred and mixed evenly, and then formed by dry pressing to obtain a ceramic green body;

[0281] 3. Low temperature sintering;

[0282] The ceramic green body was dried in a drying oven at 85°C for 4 hours, then heated at a rate of 5°C / min in a vacuum program temperature-controlled furnace to 1150°C and kept at that temperature for 1 hour. The metal and porous ceramic dual-phase composite material was obtained by cooling the furnace to room temperature.

[0283] Comparative Example 7

[0284] A metal and porous ceramic dual-phase composite material, comprising the following components per 100 parts by weight:

[0285] 40 parts of ultrafine quartz powder;

[0286] 5 parts of sintering aid CaF2;

[0287] 2 parts of nickel-iron alloy powder, wherein the nickel content of the nickel-iron alloy powder is 50 wt.%;

[0288] 3 parts of Si powder;

[0289] 8 parts of low-temperature glass powder, wherein the softening point of the low-temperature glass powder is 900°C;

[0290] 37 parts of an inorganic pore-forming agent, wherein the inorganic pore-forming agent is SiO2-Al2O3 hollow microspheres with a diameter of 100 μm;

[0291] 5 parts of polyvinyl alcohol aqueous solution, wherein the mass concentration of the polyvinyl alcohol aqueous solution is 1.0%.

[0292] A method for preparing a metal and porous ceramic dual-phase composite material comprises the following steps:

[0293] 1. Pretreatment and powder mixing;

[0294] The above-mentioned ultrafine quartz powder, sintering aid CaF2, nickel-iron alloy powder, Si powder, low-temperature glass powder and inorganic pore-forming agent are mixed, and after being fully mixed by low-speed ball milling, a mixed powder is obtained; the mesh size of the sintering aid CaF2, nickel-iron alloy powder, Si powder and low-temperature glass powder is 300 mesh.

[0295] 2. Porous ceramic molding;

[0296] The mixed powder is mixed with a polyvinyl alcohol aqueous solution, stirred and mixed evenly, and then formed by dry pressing to obtain a ceramic green body;

[0297] 3. Low temperature sintering;

[0298] The ceramic green body was dried in a drying oven at 85°C for 4 hours, then heated at a rate of 5°C / min in a vacuum program temperature-controlled furnace to 1150°C and kept at that temperature for 1 hour. The metal and porous ceramic dual-phase composite material was obtained by cooling the furnace to room temperature.

[0299] Comparative Example 8

[0300] A metal and porous ceramic dual-phase composite material, comprising the following components per 100 parts by weight:

[0301] 40 parts of ultrafine quartz powder;

[0302] 5 parts of sintering aid CaF2;

[0303] 4 parts of nickel-iron alloy powder, wherein the nickel content of the nickel-iron alloy powder is 50 wt.%;

[0304] 2 parts of Si powder;

[0305] 8 parts of low-temperature glass powder, wherein the softening point of the low-temperature glass powder is 900°C;

[0306] 36 parts of an inorganic pore-forming agent, wherein the inorganic pore-forming agent is SiO2-Al2O3 hollow microspheres with a diameter of 100 μm;

[0307] 5 parts of polyvinyl alcohol aqueous solution, wherein the mass concentration of the polyvinyl alcohol aqueous solution is 1.0%.

[0308] A method for preparing a metal and porous ceramic dual-phase composite material comprises the following steps:

[0309] 1. Pretreatment and powder mixing;

[0310] The above-mentioned ultrafine quartz powder, sintering aid CaF2, nickel-iron alloy powder, Si powder, low-temperature glass powder and inorganic pore-forming agent are mixed, and after being fully mixed by low-speed ball milling, a mixed powder is obtained; the mesh size of the sintering aid CaF2, nickel-iron alloy powder, Si powder and low-temperature glass is 300 mesh.

[0311] 2. Porous ceramic molding;

[0312] The mixed powder is mixed with a polyvinyl alcohol aqueous solution, stirred and mixed evenly, and then formed by dry pressing to obtain a ceramic green body;

[0313] 3. Low temperature sintering;

[0314] The ceramic green body was dried in a drying oven at 85°C for 4 hours, then heated at a rate of 5°C / min in a vacuum program temperature-controlled furnace to 1150°C and kept at that temperature for 1 hour. The metal and porous ceramic dual-phase composite material was obtained by cooling the furnace to room temperature.

[0315] The porosity, through-hole diameter and flexural strength of the metal and porous ceramic dual-phase composite materials prepared in the above Examples 1-7 and Comparative Examples 1-8 are shown in Table 1 below:

[0316] Table 1 Porosity, through-hole diameter and flexural strength of metal and porous ceramic dual-phase composite materials obtained in Examples 1-7 and Comparative Examples 1-8

Claims

1. A metal and porous ceramic dual-phase composite material, wherein: Each 100 parts by weight includes the following components: 35-50 parts of quartz powder or alumina ceramic powder; 3-6 parts of burning aid; 3-8 parts of metal alloy powder; 3-5 parts of Si powder and / or boron powder; 8-15 parts of low temperature glass powder; 25-40 parts of an inorganic pore-forming agent, wherein the inorganic pore-forming agent is SiO2-Al2O3 hollow microspheres; 5 to 7 parts of polyvinyl alcohol aqueous solution, wherein the mass concentration of the polyvinyl alcohol aqueous solution is 0.9% to 1.0%.

2. The metal and porous ceramic dual-phase composite material according to claim 1, wherein: The metal alloy powder is selected from one of nickel-iron alloy powder and iron-chromium alloy powder; the mesh number of the metal alloy powder is 300-400 meshes.

3. The metal and porous ceramic dual-phase composite material according to claim 1, wherein: The metal alloy powder is nickel-iron alloy powder, and the content of Ni in the nickel-iron alloy powder is 50wt.% to 65wt.%.

4. The metal and porous ceramic dual-phase composite material according to claim 1, wherein: The metal alloy powder is an iron-chromium alloy powder, and the content of Cr in the iron-chromium alloy powder is 50wt.% to 65wt.%.

5. The metal and porous ceramic dual-phase composite material according to claim 1, wherein: The sintering aid is selected from at least one of CaF2 and CaCO3.

6. The metal and porous ceramic dual-phase composite material according to claim 1, wherein: The diameter of the SiO2-Al2O3 hollow microspheres is 100 μm to 200 μm, and / or the impurity content of the SiO2-Al2O3 hollow microspheres is less than 1%.

7. The metal and porous ceramic dual-phase composite material according to claim 1, wherein: The low-temperature glass powder has a softening point of 700°C to 900°C.

8. The metal and porous ceramic dual-phase composite material according to claim 1, wherein: The mass fraction of SiO2 in the quartz powder is greater than 99%, and / or the mesh number of the quartz powder is less than 300 meshes.

9. The metal and porous ceramic dual-phase composite material according to claim 1, wherein: The purity of the alumina ceramic powder is greater than 99%, and / or the mesh number of the alumina ceramic powder is less than 300 meshes.

10. A method for preparing the metal and porous ceramic dual-phase composite material according to claim 1, wherein: The following steps are involved: S1. Pretreatment and powder mixing: adding sintering aid, metal alloy powder, Si powder or B powder, low-temperature glass powder and inorganic pore-forming agent to quartz powder or alumina ceramic powder, and then ball milling and mixing to obtain mixed powder; S2, porous ceramic molding: the mixed powder is mixed with the polyvinyl alcohol aqueous solution, stirred and mixed evenly, and then molded by dry pressing to obtain a ceramic green body; the pressure of the dry pressing molding is 400MPa to 600MPa, and the pressure holding time is 5min to 10min; S3, sintering: drying the ceramic green body at 70℃~90℃ for 4h~6h, and then sintering at a vacuum degree of 1×10 -1 The temperature is raised at a rate of less than 5°C / min under vacuum conditions below Pa, and the temperature is kept at 1100°C-1200°C for 0.5h-1h. The metal and porous ceramic dual-phase composite material is obtained by cooling the furnace to room temperature.

11. An atomizer, wherein: The atomizer comprises a porous ceramic substrate and a heating element combined with the porous ceramic substrate. The porous ceramic substrate comprises the following components in parts by weight: 35-50 parts of quartz powder or alumina ceramic powder; 3-6 parts of burning aid; 3-8 parts of metal alloy powder; 3-5 parts of Si powder and / or boron powder; 8-15 parts of low temperature glass powder; 25-40 parts of inorganic pore-forming agent, wherein the inorganic pore-forming agent is SiO2-Al2O3 hollow microspheres.

12. The atomizer according to claim 11, wherein The metal alloy powder is selected from one of nickel-iron alloy powder and iron-chromium alloy powder; and / or the mesh number of the metal alloy powder is 300-400 meshes.

13. The atomizer according to claim 11, wherein The metal alloy powder is nickel-iron alloy powder, and the content of Ni in the nickel-iron alloy powder is 50wt.% to 65wt.%.

14. The atomizer according to claim 11, wherein The metal alloy powder is an iron-chromium alloy powder, and the content of Cr in the iron-chromium alloy powder is 50wt.% to 65wt.%.

15. The atomizer according to claim 11, wherein The sintering aid is selected from at least one of CaF2 and CaCO3, and the mesh size of the sintering aid is 300 to 400 meshes.

16. The atomizer according to claim 11, wherein The diameter of the SiO2-Al2O3 hollow microspheres is 100 μm to 200 μm, and / or the impurity content of the SiO2-Al2O3 hollow microspheres is less than 1%.

17. The atomizer according to claim 11, wherein: The low-temperature glass powder has a softening point of 700°C to 900°C.

18. The atomizer according to claim 11, wherein The mass fraction of SiO2 in the quartz powder is greater than 99%, and / or the mesh number of the quartz powder is less than 300 meshes.

19. The atomizer according to claim 14, wherein: The purity of the alumina ceramic powder is greater than 99%, and / or the mesh number of the alumina ceramic powder is less than 300 meshes.

20. An electronic atomization device, wherein: It comprises the atomizer according to any one of claims 11 to 19 and a power supply component for providing power supply to the atomizer.

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