WO2020118475A1 - Composite magnetic material - Google Patents
Composite magnetic material Download PDFInfo
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- WO2020118475A1 WO2020118475A1 PCT/CN2018/119964 CN2018119964W WO2020118475A1 WO 2020118475 A1 WO2020118475 A1 WO 2020118475A1 CN 2018119964 W CN2018119964 W CN 2018119964W WO 2020118475 A1 WO2020118475 A1 WO 2020118475A1
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/10—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure
- H01F1/11—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles
- H01F1/113—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials non-metallic substances, e.g. ferrites, e.g. [(Ba,Sr)O(Fe2O3)6] ferrites with hexagonal structure in the form of particles in a bonding agent
Definitions
- the invention relates to the field of metal electronic materials, in particular to a composite magnetic material.
- Magnetic materials commonly referred to as ferromagnetic materials, are ancient and very versatile functional materials. The magnetic properties of substances have been recognized and applied as early as 3000 years ago. For example, ancient China used natural magnets as compasses. . Modern magnetic materials have been widely used in our lives. For example, permanent magnet materials are used as motors, iron core materials used in transformers, magneto-optical disks used as memories, and magnetic recording floppy disks for computers. According to Dabit News, magnetic materials are closely related to all aspects of informatization, automation, mechatronics, national defense, and national economy. However, it is generally believed that magnetic materials refer to substances that can generate magnetism directly or indirectly from excessive elements such as iron, cobalt, nickel and their alloys.
- Magnetic materials can be divided into soft magnetic materials and hard magnetic materials according to the difficulty of demagnetization after magnetization. Substances that easily remove magnetism after magnetization are called soft magnetic materials, and substances that are not easy to demagnetize are called hard magnetic materials. Generally speaking, the remanence of soft magnetic materials is small, and the remanence of hard magnetic materials is large.
- Automotive magnetic cores have stricter requirements for magnetic materials, requiring magnetic materials to have a high Curie temperature, at least above 280°C, at temperatures above 100°C, with good anti-saturation and anti-DC stacking capabilities, and The power loss of magnetic materials is lower.
- the technical problem to be solved by the present invention is to provide a composite magnetic material with high Curie temperature and saturation magnetic induction intensity.
- the technical solution of the present invention is: a composite magnetic material whose innovation lies in: the following components are made according to the weight fraction:
- iron oxide 15-20 parts of iron oxide, 43-45 parts of boron oxide, 0.5-1.2 parts of neodymium oxide, 4-5 parts of zinc, 25-35 parts of polyamide, 1-3 parts of iron scale, 10-15 parts of calcium carbonate, trioxide 12-21 parts of diniobium, 10-15 parts of barium carbonate, 11-14 parts of vanadium, 3-5 parts of calcium, 0.2-0.8 parts of strontium carbonate, 15-20 parts of silica, 13-32 parts of potassium humate, three 21-24 parts of cobalt oxide, 0.5-1.2 parts of molybdenum dioxide, 2-6 parts of phenolic resin, 1-3 parts of bentonite, 12-21 parts of cobalt, 2-6 parts of dispersant, and 4-9 parts of binder.
- the binder is a mixture of toluenesulfonic acid, sodium silicate, polyvinyl alcohol, starch and water.
- the dispersant is a mixture of vinyl bisstearic acid amide, potassium tripolyphosphate and sodium polypropylene.
- the composite magnetic material proposed by the present invention has excellent magnetic properties, stable performance, at the same time, good elasticity and stretchability, high mechanical strength, good impact resistance, and good high temperature resistance ,
- the application field is broader and will not affect the environment.
- the high-performance magnetic material of the invention has strong elasticity and stretchability, good high-temperature resistance, enhanced magnetism, is not easy to demagnetize, and is energy-saving and environmentally friendly.
- the adhesion strength and fluidity of the magnetic material are improved, thereby improving the magnetic properties of the material;
- the binder consists of toluenesulfonic acid, sodium silicate, polyvinyl alcohol, starch, and water at a temperature difference Mixed under the conditions, the obtained adhesive has good bonding effect and is not easy to agglomerate;
- the dispersing agent is a mixture of vinyl bisstearic acid amide, potassium tripolyphosphate and sodium polypropylene, and the dispersion effect is good.
- the composite magnetic material of the present invention is made of the following components according to the weight fraction ratio:
- iron oxide 15 parts iron oxide, 43 parts boron oxide, 0.5 parts neodymium oxide, 4 parts zinc, 25 parts polyamide, 1 part iron scale, 10 parts calcium carbonate, 12 parts niobium trioxide, 10 parts barium carbonate, 11 parts vanadium, 3 parts calcium, 0.2 parts strontium carbonate, 15 parts silicon dioxide, 13 parts potassium humate, 21 parts cobalt trioxide, 0.5 parts molybdenum dioxide, 2 parts phenolic resin, 1 part bentonite, 12 parts cobalt, dispersant 2 Parts, binder 4 parts.
- the binder is a mixture of toluenesulfonic acid, sodium silicate, polyvinyl alcohol, starch and water
- the dispersant is a mixture of vinyl bisstearic acid amide, potassium tripolyphosphate and sodium polypropylene.
- the composite magnetic material of the present invention is made of the following components according to the weight fraction ratio:
- the binder is a mixture of toluenesulfonic acid, sodium silicate, polyvinyl alcohol, starch and water
- the dispersant is a mixture of vinyl bisstearic acid amide, potassium tripolyphosphate and sodium polypropylene.
- the composite magnetic material of the present invention is made of the following components according to the weight fraction ratio:
- the binder is a mixture of toluenesulfonic acid, sodium silicate, polyvinyl alcohol, starch and water
- the dispersant is a mixture of vinyl bisstearic acid amide, potassium tripolyphosphate and sodium polypropylene.
- the composite magnetic material proposed by the present invention has excellent magnetic properties and stable performance. At the same time, it has good elasticity and stretchability, high mechanical strength, good impact resistance, and good high-temperature resistance. It has a wider application field. Will not affect the environment.
- the high-performance magnetic material of the invention has strong elasticity and stretchability, good high-temperature resistance, enhanced magnetism, is not easy to demagnetize, and is energy-saving and environmentally friendly.
- the adhesion strength and fluidity of the magnetic material are improved, thereby improving the magnetic properties of the material;
- the binder consists of toluenesulfonic acid, sodium silicate, polyvinyl alcohol, starch, and water at a temperature difference Mixed under the conditions, the obtained adhesive has good bonding effect and is not easy to agglomerate;
- the dispersing agent is a mixture of vinyl bisstearic acid amide, potassium tripolyphosphate and sodium polypropylene, and the dispersion effect is good.
Abstract
A composite magnetic material, which is composed of the following components according to weight fraction ratio: 15-20 parts of iron oxide, 43-45 parts of boron oxide, 0.5-1.2 parts of neodymium oxide, 4-5 parts of zinc, and 25-35 parts of polyamide, 1-3 parts of iron scale, 10-15 parts of calcium carbonate, 12-21 parts of niobium trioxide, 10-15 parts of barium carbonate, 11-14 parts of vanadium, 3-5 parts of calcium, 0.2-0.8 parts of strontium carbonate, 15-20 parts of silicon dioxide, 13-32 parts of potassium humate, 21-24 parts of cobalt trioxide, 0.5-1.2 parts of molybdenum dioxide, 2-6 parts of a phenolic resin, 1-3 parts of bentonite, 12-21 parts of cobalt, 2-6 parts of a dispersant, and 4-9 parts of an adhesive. The advantages of the material are as follows: the material has strong elasticity and stretchability, good high temperature resistance and enhanced magnetic properties, the material is not easily demagnetized, and the material is energy-saving and environmentally-friendly.
Description
本发明涉及金属电子材料领域，特别涉及一种复合磁性材料。The invention relates to the field of metal electronic materials, in particular to a composite magnetic material.
磁性材料，通常所说的磁性材料是指强磁性物质，是古老而用途十分广泛的功能材料，而物质的磁性早在3000年以前就被人们所认识和应用，例如中国古代用天然磁铁作为指南针。现代磁性材料已经广泛的用在我们的生活之中，例如将永磁材料用作马达，应用于变压器中的铁心材料，作为存储器使用的磁光盘，计算机用磁记录软盘等。大比特资讯上说，磁性材料与信息化、自动化、机电一体化、国防、国民经济的方方面面紧密相关。而通常认为，磁性材料是指由过度元素铁、钴、镍及其合金等能够直接或间接产生磁性的物质。磁性材料按磁化后去磁的难易可分为软磁性材料和硬磁性材料。磁化后容易去掉磁性的物质叫软磁性材料，不容易去磁的物质叫硬磁性材料。一般来讲软磁性材料剩磁较小，硬磁性材料剩磁较大。Magnetic materials, commonly referred to as ferromagnetic materials, are ancient and very versatile functional materials. The magnetic properties of substances have been recognized and applied as early as 3000 years ago. For example, ancient China used natural magnets as compasses. . Modern magnetic materials have been widely used in our lives. For example, permanent magnet materials are used as motors, iron core materials used in transformers, magneto-optical disks used as memories, and magnetic recording floppy disks for computers. According to Dabit News, magnetic materials are closely related to all aspects of informatization, automation, mechatronics, national defense, and national economy. However, it is generally believed that magnetic materials refer to substances that can generate magnetism directly or indirectly from excessive elements such as iron, cobalt, nickel and their alloys. Magnetic materials can be divided into soft magnetic materials and hard magnetic materials according to the difficulty of demagnetization after magnetization. Substances that easily remove magnetism after magnetization are called soft magnetic materials, and substances that are not easy to demagnetize are called hard magnetic materials. Generally speaking, the remanence of soft magnetic materials is small, and the remanence of hard magnetic materials is large.
车用磁芯对磁性材料的要求比较严格，要求磁性材料必须具有高的居里温度，至少在280℃以上，在100℃及以上温度情况下，有好的抗饱和、抗直流叠加能力，并且磁材料的功率损耗要低。Automotive magnetic cores have stricter requirements for magnetic materials, requiring magnetic materials to have a high Curie temperature, at least above 280°C, at temperatures above 100°C, with good anti-saturation and anti-DC stacking capabilities, and The power loss of magnetic materials is lower.
现有的普通磁性材料均不能满足车用磁芯的上述要求，而能够保证上述要求的磁性材料的价格过高。Existing ordinary magnetic materials can not meet the above requirements of the magnetic core for vehicles, and can ensure that the price of the above-mentioned magnetic materials is too high.
发明内容Summary of the invention
本发明要解决的技术问题是提供一种高居里温度及饱和磁感应强度的复合磁性材料。The technical problem to be solved by the present invention is to provide a composite magnetic material with high Curie temperature and saturation magnetic induction intensity.
为解决上述技术问题，本发明的技术方案为：一种复合磁性材料，其创新点在于：按重量分数配比由以下组分制成：In order to solve the above technical problems, the technical solution of the present invention is: a composite magnetic material whose innovation lies in: the following components are made according to the weight fraction:
氧化铁15-20份、氧化硼43-45份、氧化钕0.5-1.2份、锌4-5份、聚酰胺25-35份、铁鳞1-3份、碳酸钙10-15份、三氧化二铌12-21份、碳酸钡10-15份、钒11-14份、钙3-5份、碳酸锶0.2-0.8份、二氧化硅15-20份、腐植酸钾13-32份、三氧化二钴21-24份、二氧化钼0.5-1.2份、酚醛树脂2-6份、膨润土1-3份、钴12-21份、分散剂2-6份、粘合剂4-9份。15-20 parts of iron oxide, 43-45 parts of boron oxide, 0.5-1.2 parts of neodymium oxide, 4-5 parts of zinc, 25-35 parts of polyamide, 1-3 parts of iron scale, 10-15 parts of calcium carbonate, trioxide 12-21 parts of diniobium, 10-15 parts of barium carbonate, 11-14 parts of vanadium, 3-5 parts of calcium, 0.2-0.8 parts of strontium carbonate, 15-20 parts of silica, 13-32 parts of potassium humate, three 21-24 parts of cobalt oxide, 0.5-1.2 parts of molybdenum dioxide, 2-6 parts of phenolic resin, 1-3 parts of bentonite, 12-21 parts of cobalt, 2-6 parts of dispersant, and 4-9 parts of binder.
进一步的，所述粘合剂为甲苯磺酸、硅酸钠、聚乙烯醇、淀粉和水的混合物。Further, the binder is a mixture of toluenesulfonic acid, sodium silicate, polyvinyl alcohol, starch and water.
进一步的，所述分散剂为乙烯基双硬脂酰胺、三聚磷酸钾和聚丙烯钠的混合物。Further, the dispersant is a mixture of vinyl bisstearic acid amide, potassium tripolyphosphate and sodium polypropylene.
本发明的优点在于：本发明所提出的复合磁性材料，具有优异的磁性，稳定性能，同时，弹性和拉伸性良好，机械强度高，具有很好的抗冲击性能，而且，耐高温性好，应用领域更加广阔，不会影响环境。The advantages of the present invention are: the composite magnetic material proposed by the present invention has excellent magnetic properties, stable performance, at the same time, good elasticity and stretchability, high mechanical strength, good impact resistance, and good high temperature resistance , The application field is broader and will not affect the environment.
本发明高性能磁性材料，具有很强的弹性和可拉伸性，耐高温性能好，增强了磁性，不易消磁，而且节能环保。The high-performance magnetic material of the invention has strong elasticity and stretchability, good high-temperature resistance, enhanced magnetism, is not easy to demagnetize, and is energy-saving and environmentally friendly.
通过添加粘合剂与分散剂，使得磁性材料的粘合强度与流动性有所提高，从而改善材料的磁性；粘合剂由甲苯磺酸、硅酸钠、聚乙烯 醇、淀粉和水在温差条件下混合而成，得到的粘合剂粘结效果好，不易结团；所述分散剂为乙烯基双硬脂酰胺、三聚磷酸钾和聚丙烯钠的混合物，分散效果好。By adding a binder and a dispersant, the adhesion strength and fluidity of the magnetic material are improved, thereby improving the magnetic properties of the material; the binder consists of toluenesulfonic acid, sodium silicate, polyvinyl alcohol, starch, and water at a temperature difference Mixed under the conditions, the obtained adhesive has good bonding effect and is not easy to agglomerate; the dispersing agent is a mixture of vinyl bisstearic acid amide, potassium tripolyphosphate and sodium polypropylene, and the dispersion effect is good.
下面的实施例可以使本专业的技术人员更全面地理解本发明，但并不因此将本发明限制在所述的实施例范围之中。The following embodiments can enable those skilled in the art to more fully understand the present invention, but do not limit the present invention to the scope of the described embodiments.
实施例1Example 1
本发明的复合磁性材料按重量分数配比由以下组分制成：The composite magnetic material of the present invention is made of the following components according to the weight fraction ratio:
氧化铁15份、氧化硼43份、氧化钕0.5份、锌4份、聚酰胺25份、铁鳞1份、碳酸钙10份、三氧化二铌12份、碳酸钡10份、钒11份、钙3份、碳酸锶0.2份、二氧化硅15份、腐植酸钾13份、三氧化二钴21份、二氧化钼0.5份、酚醛树脂2份、膨润土1份、钴12份、分散剂2份、粘合剂4份。15 parts iron oxide, 43 parts boron oxide, 0.5 parts neodymium oxide, 4 parts zinc, 25 parts polyamide, 1 part iron scale, 10 parts calcium carbonate, 12 parts niobium trioxide, 10 parts barium carbonate, 11 parts vanadium, 3 parts calcium, 0.2 parts strontium carbonate, 15 parts silicon dioxide, 13 parts potassium humate, 21 parts cobalt trioxide, 0.5 parts molybdenum dioxide, 2 parts phenolic resin, 1 part bentonite, 12 parts cobalt, dispersant 2 Parts, binder 4 parts.
上述配方中，粘合剂为甲苯磺酸、硅酸钠、聚乙烯醇、淀粉和水的混合物，分散剂为乙烯基双硬脂酰胺、三聚磷酸钾和聚丙烯钠的混合物。In the above formulation, the binder is a mixture of toluenesulfonic acid, sodium silicate, polyvinyl alcohol, starch and water, and the dispersant is a mixture of vinyl bisstearic acid amide, potassium tripolyphosphate and sodium polypropylene.
实施例2Example 2
本发明的复合磁性材料按重量分数配比由以下组分制成：The composite magnetic material of the present invention is made of the following components according to the weight fraction ratio:
氧化铁20份、氧化硼45份、氧化钕1.2份、锌5份、聚酰胺35份、铁鳞3份、碳酸钙15份、三氧化二铌21份、碳酸钡15份、钒14份、钙5份、碳酸锶0.8份、二氧化硅20份、腐植酸钾32份、三氧化二钴24份、二氧化钼1.2份、酚醛树脂6份、膨润土3份、钴 21份、分散剂6份、粘合剂9份。Iron oxide 20 parts, boron oxide 45 parts, neodymium oxide 1.2 parts, zinc 5 parts, polyamide 35 parts, iron scale 3 parts, calcium carbonate 15 parts, niobium trioxide 21 parts, barium carbonate 15 parts, vanadium 14 parts, 5 parts of calcium, 0.8 parts of strontium carbonate, 20 parts of silica, 32 parts of potassium humate, 24 parts of cobalt trioxide, 1.2 parts of molybdenum dioxide, 6 parts of phenolic resin, 3 parts of bentonite, 21 parts of cobalt, dispersant 6 Parts, 9 parts of adhesive.
上述配方中，粘合剂为甲苯磺酸、硅酸钠、聚乙烯醇、淀粉和水的混合物，分散剂为乙烯基双硬脂酰胺、三聚磷酸钾和聚丙烯钠的混合物。In the above formulation, the binder is a mixture of toluenesulfonic acid, sodium silicate, polyvinyl alcohol, starch and water, and the dispersant is a mixture of vinyl bisstearic acid amide, potassium tripolyphosphate and sodium polypropylene.
实施例3Example 3
本发明的复合磁性材料按重量分数配比由以下组分制成：The composite magnetic material of the present invention is made of the following components according to the weight fraction ratio:
氧化铁17份、氧化硼44份、氧化钕0.8份、锌5份、聚酰胺30份、铁鳞2份、碳酸钙13份、三氧化二铌17份、碳酸钡12份、钒13份、钙4份、碳酸锶0.5份、二氧化硅17份、腐植酸钾21份、三氧化二钴22份、二氧化钼0.8份、酚醛树脂4份、膨润土2份、钴18份、分散剂4份、粘合剂6份。17 parts of iron oxide, 44 parts of boron oxide, 0.8 parts of neodymium oxide, 5 parts of zinc, 30 parts of polyamide, 2 parts of iron scale, 13 parts of calcium carbonate, 17 parts of niobium trioxide, 12 parts of barium carbonate, 13 parts of vanadium, 4 parts calcium, 0.5 parts strontium carbonate, 17 parts silicon dioxide, 21 parts potassium humate, 22 parts cobalt trioxide, 0.8 parts molybdenum dioxide, 4 parts phenolic resin, 2 parts bentonite, 18 parts cobalt, dispersant 4 Parts, 6 parts of adhesive.
上述配方中，粘合剂为甲苯磺酸、硅酸钠、聚乙烯醇、淀粉和水的混合物，分散剂为乙烯基双硬脂酰胺、三聚磷酸钾和聚丙烯钠的混合物。In the above formulation, the binder is a mixture of toluenesulfonic acid, sodium silicate, polyvinyl alcohol, starch and water, and the dispersant is a mixture of vinyl bisstearic acid amide, potassium tripolyphosphate and sodium polypropylene.
本发明所提出的复合磁性材料，具有优异的磁性，稳定性能，同时，弹性和拉伸性良好，机械强度高，具有很好的抗冲击性能，而且，耐高温性好，应用领域更加广阔，不会影响环境。The composite magnetic material proposed by the present invention has excellent magnetic properties and stable performance. At the same time, it has good elasticity and stretchability, high mechanical strength, good impact resistance, and good high-temperature resistance. It has a wider application field. Will not affect the environment.
本发明高性能磁性材料，具有很强的弹性和可拉伸性，耐高温性能好，增强了磁性，不易消磁，而且节能环保。The high-performance magnetic material of the invention has strong elasticity and stretchability, good high-temperature resistance, enhanced magnetism, is not easy to demagnetize, and is energy-saving and environmentally friendly.
通过添加粘合剂与分散剂，使得磁性材料的粘合强度与流动性有所提高，从而改善材料的磁性；粘合剂由甲苯磺酸、硅酸钠、聚乙烯醇、淀粉和水在温差条件下混合而成，得到的粘合剂粘结效果好，不 易结团；所述分散剂为乙烯基双硬脂酰胺、三聚磷酸钾和聚丙烯钠的混合物，分散效果好。By adding a binder and a dispersant, the adhesion strength and fluidity of the magnetic material are improved, thereby improving the magnetic properties of the material; the binder consists of toluenesulfonic acid, sodium silicate, polyvinyl alcohol, starch, and water at a temperature difference Mixed under the conditions, the obtained adhesive has good bonding effect and is not easy to agglomerate; the dispersing agent is a mixture of vinyl bisstearic acid amide, potassium tripolyphosphate and sodium polypropylene, and the dispersion effect is good.
本行业的技术人员应该了解，本发明不受上述实施例的限制，上述实施例和说明书中描述的只是说明本发明的原理，在不脱离本发明精神和范围的前提下，本发明还会有各种变化和改进，这些变化和改进都落入要求保护的本发明范围内。本发明要求保护范围由所附的权利要求书及其等效物界定。Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the description only describe the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have Various changes and improvements which fall within the scope of the claimed invention. The claimed protection scope of the present invention is defined by the appended claims and their equivalents.
Claims (3)
- 一种复合磁性材料，其特征在于：按重量分数配比由以下组分制成：A composite magnetic material, characterized in that it is made of the following components according to the weight fraction:氧化铁15-20份、氧化硼43-45份、氧化钕0.5-1.2份、锌4-5份、聚酰胺25-35份、铁鳞1-3份、碳酸钙10-15份、三氧化二铌12-21份、碳酸钡10-15份、钒11-14份、钙3-5份、碳酸锶0.2-0.8份、二氧化硅15-20份、腐植酸钾13-32份、三氧化二钴21-24份、二氧化钼0.5-1.2份、酚醛树脂2-6份、膨润土1-3份、钴12-21份、分散剂2-6份、粘合剂4-9份。15-20 parts iron oxide, 43-45 parts boron oxide, 0.5-1.2 parts neodymium oxide, 4-5 parts zinc, 25-35 parts polyamide, 1-3 parts iron scale, 10-15 parts calcium carbonate, trioxide 12-21 parts of diniobium, 10-15 parts of barium carbonate, 11-14 parts of vanadium, 3-5 parts of calcium, 0.2-0.8 parts of strontium carbonate, 15-20 parts of silica, 13-32 parts of potassium humate, three 21-24 parts of cobalt oxide, 0.5-1.2 parts of molybdenum dioxide, 2-6 parts of phenolic resin, 1-3 parts of bentonite, 12-21 parts of cobalt, 2-6 parts of dispersant, and 4-9 parts of binder.
- 根据权利要求1所述的复合磁性材料，其特征在于：所述粘合剂为甲苯磺酸、硅酸钠、聚乙烯醇、淀粉和水的混合物。The composite magnetic material according to claim 1, wherein the binder is a mixture of toluenesulfonic acid, sodium silicate, polyvinyl alcohol, starch, and water.
- 根据权利要求1所述的复合磁性材料，其特征在于：所述分散剂为乙烯基双硬脂酰胺、三聚磷酸钾和聚丙烯钠的混合物。The composite magnetic material according to claim 1, wherein the dispersant is a mixture of vinyl bisstearic acid amide, potassium tripolyphosphate, and sodium polypropylene.
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