CN101577162B - Anisotropic samarium-cobalt bonded magnetic powder - Google Patents
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Abstract
The invention discloses a composition of components of anisotropic samarium-cobalt bonded magnetic powder. The formula thereof is SmzCo1-x-y-z-a-Beta-ThetaCuxFeyZraGaBetaNbTheta, wherein Sm is samarium, Co is cobalt, Cu is copper, Fe is ferrum, Ga is gallium, Zr is zirconium and Nb is niobium. The provided Sm-Co magnetic powder and the magnet is added with gallium, uses transitional metal niobiumto partially replace zirconium to improve microstructure of alloy, lead the crystal grain to be fine and evenly distributed and obviously improve pinning effect of domain walls, thus obtaining higher coercive force and very low temperature coefficient and being capable of keeping higher magnetic performance under high temperature.
Description
Technical field
The present invention relates to a kind of high-performance low-temperature coefficient, the one-tenth of anisotropic samarium-cobalt bonded magnetic powder is grouped into, and particularly contains gallium and transition metal niobium about interpolation, and the proportion of composing of metal niobium and metal zirconium, belongs to chemical industry class technical field.
Background technology
The Sm2Co17 magnetic material is called SmCo 2: 17 again, and it is different from SmCo5 (being called 1: 5 again), is a kind of anisotropic magnetic material.Can make anisotropy sintering Sm2Co17 magnet, have better magnetic properties and temperature characterisitic, can under higher temperature environment, use, be widely used in war industry, industries such as aircraft industry.Initial discovers, though the Sm2Co17 binary compound is easy C axle, because its coercive force is on the low side, is difficult to practicality.Through constantly research and development, the polynary Sm-Co-Cu-Fe-M system that is used widely at present, wherein,
M=Zr, Ti, Hf, Ni or the like.
Practice shows, the interpolation of Cu element make the coercive force of magnet increase, but the Cu element is too high, can make that Ms is on the low side.The suitable interpolation of Fe element makes the intrinsic saturation magnetization of alloy improve rapidly.And the suitable interpolation of Zr element plays key effect for the mHc that improves 2: 17 type magnets.It can also change and optimize Sm, Fe, and the adding proportion of various elements such as Cu is improved the squareness of magnet and the magnetic property of whole magnet greatly.
Though have high Curie temperature and magnetic energy level at 2: 17, and 2: 17 Sm (Co, Cu, Fe, coercive force Zr) is at high temperature lower.When 300 ℃-400 ℃ of temperature, the microscopic structure of magnet changes, grain growth, cellular structure is destroyed, change inhomogeneous, and phase transformation in 1: 5 not exclusively continuously, cause cell wall to destroy, domain wall moves easier, so coercitive temperature coefficient higher (β T=-0.35%/℃).For this reason, in recent years, domestic and international research considered 1: 7 Sm (Co, Cu, Fe, magnet Zr) has been obtained result preferably, can be so that coercive force temperature coefficient obviously reduces, reach β T=-0.12%/℃.
Sm2Co17 also can make anisotropic magnet powder, is used to be processed into bonded magnet, and this type of magnet had both kept higher magnetic property and hot properties, and the magnet that can make various complicated shapes is arranged, so very application prospects and development prospect are also arranged.
For improving production technology, improve the stability of product, Japanese three moral companies have researched and developed the process with the fast quenching thin slice, and the magnetic particle capability of producing is Br=10.8kG, Hi=11.4kOe, Hc=7.4, BHmax=24.6MGOe at normal temperatures.Three moral companies have applied for the patent of invention (patent No.: P2000:272767) for this reason.Yet, also lack the SmCo magnetic that is applicable to the high-performance low-temperature coefficient that uses under the high-temperature on the market.About the research and development of this respect, also seldom see report.
Our company attempts a kind of each diversity SmCo magnetic that can large-scale production of research and development, has more low coercive force temperature coefficient, and still have higher coercive force and magnetic property under 300 ℃ condition of work.We are by a large amount of experimental studies have found that, if in samarium-cobalt alloy, suitably add gallium element, and add a certain proportion of niobium unit usually part replace zr element, the SmCo magnetic of being produced not only has higher HCJ and magnetic energy level, and in the temperature range of room temperature to 300 ℃ lower coercive force temperature coefficient is arranged.If the ratio of metal niobium and metal zirconium is suitable, its HCJ temperature coefficient can be lower than-0.03%/℃.
Summary of the invention
Main purpose of the present invention, be to provide a kind of new SmCo magnetic powder material, it has lower coercive force temperature coefficient, makes magnet still have higher more stable HCJ (Hci) under 300 ℃ of temperature, thereby makes magnetic have good heat demagnetization characteristics;
Another purpose of the present invention is to provide a kind of special SmCo magnetic powder material composition to constitute, and makes magnet have very low coercive force temperature coefficient (be lower than-0.03%/℃).
A further object of the present invention is to provide a kind of production technology, makes above-mentioned magnet invention be able to implement scale production.
To achieve these goals, the present invention is by the following technical solutions:
A kind of anisotropic samarium-cobalt bonded magnetic powder, its expression formula is as follows:
Smz?Co?100-x-y-a-β-θ-zCuxFeyZraGaβNbθ
Wherein Sm is the rare earth samarium element, and Co is the metallic cobalt element, and Cu is the metallic copper element, and Fe is the metallic iron element, and Zr is the metal zirconium element, and Ga is the gallium element, and Nb is a transition metal niobium element.
Its composition ratio (unit is atomic percent at%) x, y, z, a, β and θ satisfy respectively: 5.9＜x＜7.2; 18.9＜y＜20.9; 10.2＜z＜11.4; 0.75＜a＜3.1; 0.1＜β＜0.4; 0.10＜θ＜2.1.
A kind of anisotropic samarium-cobalt bonded magnetic powder, the ratio of described a and θ is preferably: satisfy 20%＜θ at%: a at%＜60%.
Beneficial effect of the present invention is:
The present invention is a main component with the SmCoCuFeZr quinary alloy, by suitable interpolation gallium, add the transition metal niobium and come part substituted metal element zirconium, improved the microstructure of alloy, make crystal grain refinement greatly, and evenly, thereby improved magnet coercive force and magnetic property at normal temperatures.
Description of drawings
Fig. 1 is the device schematic diagram of 50kg vacuum melting furnace.
Fig. 2 is the sectional view of two-sided cooling bath.
Figure 3 shows that the device schematic diagram of the vertical sintering furnace of 60kg.
Embodiment
1. implementing process
1) alloy melting
Get the raw materials ready by said ratio, aspect the raw material Control of Impurities, following characteristics and requirement are arranged: use the rare earth metal samarium of 99.9wt% purity, wherein oxygen content is less than 300ppm, and nitrogen content is less than 50ppm, and considers the volatilization loss compensation of samarium metal; Use high-purity oxygen-free copper; Use high purity iron, wherein, carbon content is less than 250ppm, and silicone content is less than 1000ppm; Use the regular grade gallium; Use the metal zirconium of 99.5wt% purity; Use the metal niobium of purity as 99.5wt%; Use 99.9wt% purity metallic cobalt, wherein oxygen content is less than 300ppm; Nitrogen content is less than 50ppm; 15 kilograms of each batch batchings are put into 50kg vacuum melting furnace as shown in Figure 1.Vacuum melting furnace has a body of heater 2, one vacuum system 1 is coupled and it is vacuumized, have a melting kettle 3 and a two-sided cooling bath 5 in the body of heater, have an infrared temperature measurement apparatus 4 can monitor temperature in the body of heater on the body of heater, also have an observation window 6 to observe situation use in the body of heater for operating personnel.Batching is placed melting kettle 3, (8*10 under high vacuum condition
-3Pa) melting and refining, smelting temperature are 1330 ℃, and the objectionable impurities in the alloy is removed in refining 20 minutes under 1325 ℃ and 10 holder argon gas atmosphere then.
2) casting crystallization
The alloy solution temperature is brought up to 1335 ℃ waters and pours that (groove face is made by copper alloy plate in the two-sided cooling bath into, about 12 millimeters of separation), the structure of two-sided cooling bath as shown in Figure 2, have funnel 7, a cover plate 8 and a base plate 11 for the alloy solution adding, a plurality of water cooling ingot mould 9 stacked being placed in one, cooling bath also has a plurality of water inlets 12 and delivery port 13.Alloy solution 10 is poured into after the cooling bath, and the water cooling ingot mould of flowing through will the rapid condensation crystallization, forms good column crystal, and the quality of column crystal directly influences magnetic property.The about 12-13 millimeter of the thickness of alloy sheets.Measure alloying component with ICP, alloying component is monitored.
3) sintering is molten admittedly
Alloy is broken into the fritter of 30 mm sizes, put into the vertical sintering furnace of 60kg (making) by Qingdao absolute sincerity Huaqi IDTC microelectronic device Co., Ltd, the structure of vertical sintering furnace as shown in Figure 3, form by the vacuum heating chamber 17 on top and the Ar gas circulation cooling chamber 23 of bottom, and connect a vacuum system 24.Heating in vacuum is indoor three layered material storehouses from top to bottom, and each layer can be put about 20 kilograms of alloys.By PC14 and PLC Programmable Logic Controller 15 a plurality of thermocouples 16 of regulation and control and calandria power regulating eqiupment heating power supplies 19, a plurality of heaters 18 that are connected on the heating power supply can heat feed bin.The temperature difference of furnace inner space is about+and/-2 ℃.Ar gas circulation cooling chamber 23 links to each other with an oil-to-water heat exchanger 20 and a centrifugal fan 21, and has machine drawing structure 22 to make to add feed bin and quickly fallen in the cooling chamber by heating chamber.
Vacuumize, begin to heat up.
A) be warming up to 410 ℃ with 20 ℃/minute speed, and kept 90 minutes, then at 410 ℃
B) be warming up to 960 ℃ with 25 ℃/minute speed, and kept 60 minutes, then at 960 ℃
C) be warming up to 1210 ℃ with 20 ℃/minute speed, and kept 120 minutes, then at 1210 ℃
D) be cooled to 1160 ℃ with 20 ℃/minute speed, and kept 120 minutes, then at 1160 ℃
E) chilling, (within 5 minutes) drop to the alloy feed bin in the cooling chamber rapidly, with 200 ℃/minute speed alloy are cooled to below 200 ℃.
4) heat treatment
A) be warming up to 820 ℃ with 20 ℃/minute speed, and in 10 holder argon gas atmosphere, kept 12 hours at 820 ℃, then
B) be cooled to 400 ℃ with 5 ℃/minute speed, and kept 6 hours, then at 400 ℃
C) be cooled fast to room temperature, come out of the stove.
5) fragmentation
Alloy being crushed to below 40 orders with ball mill under the argon shield, is made magnetic.
6) detect and contrast
The magnetic of making is tested every magnetic property index with VSM (the vibrations magnetic sample is counted mutually).
7) method of testing
A) composition test
The composition of alloy is analyzed with ICP (ICP).
B) magnetic property index test
Method with high-temperature nylon 12 sealings fixes magnetic, the weight ratio of nylon and magnetic is 2: 8, in special heated grinding tool, make the cylindrical magnet of Dia 6mmx10mm, and in 380 ℃ of solid coagulating to the magnetic orientation that magnetizes, magnet charger with 4T magnetizes then, with the every magnetic property index under VSM (vibrating example magnetic is counted mutually) the open test different temperatures of U.S. Lakeshore product, and calculate remanent magnetism temperature coefficient and (intrinsic) coercive force temperature coefficient.The computing formula of temperature coefficient is as follows:
Remanent magnetism temperature coefficient: a T1={ (Br (T1)-Br (T0))/[Br (T0) is (T1-T0)] } x100%
Coercive force temperature coefficient: β T1={ (Hci (T1)-Hci (T0))/[Hci (T0) is (T1-T0)] } x100%
According to atomic composition percentage, use the rare earth metal samarium of 99.9wt% purity, z=10.21at%; Use high-purity oxygen-free copper, x=5.91at%; Use high purity iron, y=18.94at%; Use regular grade gallium β=0.1at%; Use the metal niobium θ=0.11at% of 99.5wt% purity, use the metal zirconium a=0.75at% of 99.5wt% purity; Use 99.9wt% purity metallic cobalt 63.98at%, prepare burden 15 kilograms altogether, by technology of the present invention, drop into melting and refining in the 50kg vacuum melting furnace, casting forms the column crystal sheet alloy, puts into the vertical sintering furnace of 60kg after the coarse crushing.Handle with Technology for Heating Processing according to sintering provided by the present invention is molten admittedly.Alloy is broken into magnetic.The magnetic of making is fully mixed for about 14 kilograms.Therefrom take out about 200 grams of magnetic sample, described by above-mentioned test technology, make 5 magnet samples, after magnetizing, under 296K and 573K temperature,, average through the VSM test, the result is as follows: Br (0)=10.30kGs, Hci (0)=10.40KOe, BHmax=23.1MGOe; Br (1)=8.7KGs, Hci (1)=8.30KOe, BHmax=15.6; AT1=-0.056%, β T1=-0.073%.
Embodiment 2
According to atomic composition percentage, use the rare earth metal samarium of 99.9wt% purity, z=11.40at%; Use high-purity oxygen-free copper, x=7.20at%; Use high purity iron, y=20.90at%; Use regular grade gallium β=0.40at%; Use the metal niobium θ=0.23at% of 99.5wt% purity; Use the metal zirconium a=3.10at% of 99.5wt% purity; 99.9wt% purity metallic cobalt 56.80at% prepares burden 15 kilograms, by technology of the present invention, drops into melting and refining in the 50kg vacuum melting furnace, and casting forms the column crystal sheet alloy, puts into the vertical sintering furnace of 60kg after the coarse crushing.Handle with Technology for Heating Processing according to sintering provided by the present invention is molten admittedly.Alloy is broken into magnetic.The magnetic of making is fully mixed for about 14 kilograms.Therefrom take out about 200 grams of magnetic sample, described by above-mentioned test technology, make 5 magnet samples, after magnetizing, under 296K and 573K temperature,, average through the VSM test, the result is as follows: Br (0)=10.00kGs, Hci (0)=10.90KOe, BHmax=22.9MGOe; Br (1)=8.6KGs, Hci (1)=8.50KOe, BHmax=15.6; AT1=-0.051%, β T1=-0.079%.
Embodiment 3
According to atomic composition percentage, use the rare earth metal samarium of 99.9wt% purity, z=10.56at%; Use high-purity oxygen-free copper, x=6.41at%; Use high purity iron, y=19.77at%; Use regular grade gallium β=0.10at%; Use the metal niobium θ=0.38at% of 99.5wt% purity; Use the metal zirconium a=1.89at% of 99.5wt% purity; 99.9wt% purity metallic cobalt 60.89at% prepares burden 15 kilograms, by technology of the present invention, drops into melting and refining in the 50kg vacuum melting furnace, and casting forms the column crystal sheet alloy, puts into the vertical sintering furnace of 60kg after the coarse crushing.Handle with Technology for Heating Processing according to sintering provided by the present invention is molten admittedly.Alloy is broken into magnetic.The magnetic of making is fully mixed for about 14 kilograms.Therefrom take out about 200 grams of magnetic sample, described by above-mentioned test technology, make 5 magnet samples, after magnetizing, under 296K and 573K temperature,, average through the VSM test, the result is as follows: Br (0)=10.40kGs, Hci (0)=10.41KOe, BHmax=23.4MGOe; Br (1)=9.1KGs, Hci (1)=9.60KOe, BHmax=17.1; AT1=-0.045%, β T1=-0.028%.
Embodiment 4
According to atomic composition percentage, use the rare earth metal samarium of 99.9wt% purity, z=10.55at%; Use high-purity oxygen-free copper, x=6.41at%; Use high purity iron, y=19.77at%; Use regular grade gallium β=0.20at%; Use the metal niobium θ=0.45at% of 99.5wt% purity; Use the metal zirconium a=1.74at% of 99.5wt% purity; 99.9wt% purity metallic cobalt 60.89at% prepares burden 15 kilograms, by technology of the present invention, drops into melting and refining in the 50kg vacuum melting furnace, and casting forms the column crystal sheet alloy, puts into the vertical sintering furnace of 60kg after the coarse crushing.Handle with Technology for Heating Processing according to sintering provided by the present invention is molten admittedly.Alloy is broken into magnetic.The magnetic of making is fully mixed for about 14 kilograms.Therefrom take out about 200 grams of magnetic sample, described by above-mentioned test technology, make 5 magnet samples, after magnetizing, under 296K and 573K temperature,, average through the VSM test, the result is as follows: Br (0)=10.80kGs, Hci (0)=10.61KOe, BHmax=24.6MGOe; Br (1)=9.4KGs, Hci (1)=9.90KOe, BHmax=18.7; AT1=-0.047%, β T1=-0.024%.
According to atomic composition percentage, use the rare earth metal samarium of 99.9wt% purity, z=10.55at%; Use high-purity oxygen-free copper, x=6.40at%; Use high purity iron, y=19.76at%; Use regular grade gallium β=0.30at%; Use the metal niobium θ=0.59at% of 99.5wt% purity; Use the metal zirconium a=1.51at% of 99.5wt% purity; 99.9wt% purity metallic cobalt 60.88at% prepares burden 15 kilograms, by technology of the present invention, drops into melting and refining in the 50kg vacuum melting furnace, and casting forms the column crystal sheet alloy, puts into the vertical sintering furnace of 60kg after the coarse crushing.Handle with Technology for Heating Processing according to sintering provided by the present invention is molten admittedly.Alloy is broken into magnetic.The magnetic of making is fully mixed for about 14 kilograms.Therefrom take out about 200 grams of magnetic sample, described by above-mentioned test technology, make 5 magnet samples, after magnetizing, under 296K and 573K temperature,, average through the VSM test, the result is as follows: Br (0)=10.70kGs, Hci (0)=10.80KOe, BHmax=24.5MGOe; Br (1)=9.3KGs, Hci (1)=10.30KOe, BHmax=18.5; AT1=-0.047%, β T1=-0.017%.
According to atomic composition percentage, use the rare earth metal samarium of 99.9wt% purity, z=10.56at%; Use high-purity oxygen-free copper, x=6.41at%; Use high purity iron, y=19.77at%; Use regular grade gallium β=0.30at%; Use the metal niobium θ=0.74at% of 99.5wt% purity; Use the metal zirconium a=1.44at% of 99.5wt% purity; 99.9wt% purity metallic cobalt 60.78at% prepares burden 15 kilograms, by technology of the present invention, drops into melting and refining in the 50kg vacuum melting furnace, and casting forms the column crystal sheet alloy, puts into the vertical sintering furnace of 60kg after the coarse crushing.Handle with Technology for Heating Processing according to sintering provided by the present invention is molten admittedly.Alloy is broken into magnetic.The magnetic of making is fully mixed for about 14 kilograms.Therefrom take out about 200 grams of magnetic sample, described by above-mentioned test technology, make 5 magnet samples, after magnetizing, under 296K and 573K temperature,, average through the VSM test, the result is as follows: Br (0)=10.50kGs, Hci (0)=11.01KOe, BHmax=23.6MGOe; Br (1)=9.2KGs, Hci (1)=10.40KOe, BHmax=18.3; AT1=-0.045%, β T1=-0.020%.
According to atomic composition percentage, use the rare earth metal samarium of 99.9wt% purity, z=10.56at%; Use high-purity oxygen-free copper, x=6.41at%; Use high purity iron, y=19.77at%; Use regular grade gallium β=0.30at%; Use the metal niobium θ=0.82at% of 99.5wt% purity; Use the metal zirconium a=1.36at% of 99.5wt% purity; 99.9wt% purity metallic cobalt 60.79at% prepares burden 15 kilograms, by technology of the present invention, drops into melting and refining in the 50kg vacuum melting furnace, and casting forms the column crystal sheet alloy, puts into the vertical sintering furnace of 60kg after the coarse crushing.Handle with Technology for Heating Processing according to sintering provided by the present invention is molten admittedly.Alloy is broken into magnetic.The magnetic of making is fully mixed for about 14 kilograms.Therefrom take out about 200 grams of magnetic sample, described by above-mentioned test technology, make 5 magnet samples, after magnetizing, under 296K and 573K temperature,, average through the VSM test, the result is as follows: Br (0)=10.40kGs, Hci (0)=11.21KOe, BHmax=23.3MGOe; Br (1)=9.2KGs, Hci (1)=10.50KOe, BHmax=18.71MGOe; AT1=-0.042%, β T1=-0.023%.
According to atomic composition percentage, use the rare earth metal samarium of 99.9wt% purity, z=10.59at%; Use high-purity oxygen-free copper, x=6.43at%; Use high purity iron, y=19.83at%; Use regular grade gallium β=0.40at%; Use the metal niobium θ=1.12at% of 99.5wt% purity; Use the metal zirconium a=1.52at% of 99.5wt% purity; 99.9wt% purity metallic cobalt 60.13at% prepares burden 15 kilograms, by technology of the present invention, drops into melting and refining in the 50kg vacuum melting furnace, and casting forms the column crystal sheet alloy, puts into the vertical sintering furnace of 60kg after the coarse crushing.Handle with Technology for Heating Processing according to sintering provided by the present invention is molten admittedly.Alloy is broken into magnetic.The magnetic of making is fully mixed for about 14 kilograms.Therefrom take out about 200 grams of magnetic sample, described by above-mentioned test technology, make 5 magnet samples, after magnetizing, under 296K and 573K temperature,, average through the VSM test, the result is as follows: Br (0)=9.90kGs, Hci (0)=12.01KOe, BHmax=23.6MGOe; Br (1)=8.8KGs, Hci (1)=10.40KOe, BHmax=16.3MGOe; AT1=-0.040%, β T1=-0.048%.
According to atomic composition percentage, use the rare earth metal samarium of 99.9wt% purity, z=10.55at%; Use high-purity oxygen-free copper, x=6.41at%; Use high purity iron, y=19.77at%; Use regular grade gallium β=0.20at%; Use the metal niobium θ=0.45at% of 99.5wt% purity; Use the metal zirconium a=1.74at% of 99.5wt% purity; 99.9wt% purity metallic cobalt 60.89at% prepares burden 15 kilograms, by technology of the present invention, drops into melting and refining in the 50kg vacuum melting furnace, and casting forms the column crystal sheet alloy, puts into the vertical sintering furnace of 60kg after the coarse crushing.Handle with Technology for Heating Processing according to sintering provided by the present invention is molten admittedly.Alloy is broken into magnetic.The magnetic of making is fully mixed for about 14 kilograms.Therefrom take out about 200 grams of magnetic sample, described by above-mentioned test technology, make 5 magnet samples, after magnetizing, under 296K and 573K temperature,, average through the VSM test, the result is as follows: Br (0)=9.80kGs, Hci (0)=12.21KOe, BHmax=21.80MGOe; Br (1)=8.50KGs, Hci (1)=10.40KOe, BHmax=15.2MGOe; AT1=-0.048%, β T1=-0.053%.
According to atomic composition percentage, use the rare earth metal samarium of 99.9wt% purity, z=10.58at%; Use high-purity oxygen-free copper, x=6.42at%; Use high purity iron, y=19.81at%; Use regular grade gallium β=0.20at%; Use the metal niobium θ=2.08at% of 99.5wt% purity; Use the metal zirconium a=0.38at% of 99.5wt% purity; 99.9wt% purity metallic cobalt 60.54at% prepares burden 15 kilograms, by technology of the present invention, drops into melting and refining in the 50kg vacuum melting furnace, and casting forms the column crystal sheet alloy, puts into the vertical sintering furnace of 60kg after the coarse crushing.Handle with Technology for Heating Processing according to sintering provided by the present invention is molten admittedly.Alloy is broken into magnetic.The magnetic of making is fully mixed for about 14 kilograms.Therefrom take out about 200 grams of magnetic sample, described by above-mentioned test technology, make 5 magnet samples, after magnetizing, under 296K and 573K temperature,, average through the VSM test, the result is as follows: Br (0)=9.60kGs, Hci (0)=12.52KOe, BHmax=21.22MGOe; Br (1)=8.41KGs, Hci (1)=10.30KOe, BHmax=14.5MGOe; AT1=-0.045%, β T1=-0.064%.
Table 1 is the list of all embodiment magnetic properties and temperature coefficient.Therefrom as seen, satisfy or near ratio: 20%＜θ at%: the coercive force temperature coefficient β T1 of the embodiment 3-7 of a at%＜60% significantly is lower than embodiment 1-2,8-10, has all reached to be lower than-0.03% standard.
Claims (2)
1. an anisotropic samarium-cobalt bonded magnetic powder is characterized in that, its general formula is:
Smz?Co?100-x-y-a-β-θ-zCuxFeyZraGaβNbθ，
In the formula, Sm is the samarium element, and Co is a cobalt element, and Cu is a copper, and Fe is a ferro element, and Ga is a gallium element, and Zr is a zr element, and Nb is the niobium element;
Described x, y, z, a, β, and θ satisfies respectively: 5.9＜x＜7.2; 18.9＜y＜20.9; 10.2＜z＜11.4; 0.75＜a＜3.1; 0.1＜β＜0.4; 0.10＜θ＜2.1; Unit is an atomic percent.
2. the samarium-cobalt bonded magnetic powder of each diversity according to claim 1 is characterized in that, the ratio of described a and θ satisfies: 20%＜θ at%: a at%＜60%.
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| CN106887292B (en) * | 2017-03-27 | 2018-07-13 | 河北工业大学 | SmCo5Base permanent magnetism thin strip magnet and preparation method thereof |
| CN111210960B (en) * | 2020-01-20 | 2022-05-31 | 苏州航大新材料科技有限公司 | High-squareness-degree high-magnetic-energy-product samarium cobalt permanent magnet material and preparation method thereof |
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| CN1272213A (en) * | 1998-05-26 | 2000-11-01 | 日立金属株式会社 | Nitride type rare-earth permanent magnet material and bonded magnet using same |
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|---|---|---|---|---|
| US4536233A (en) * | 1980-12-16 | 1985-08-20 | Kabushiki Kaisha Suwa Seikosha | Columnar crystal permanent magnet and method of preparation |
| CN1272213A (en) * | 1998-05-26 | 2000-11-01 | 日立金属株式会社 | Nitride type rare-earth permanent magnet material and bonded magnet using same |
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