CN109206131A - A kind of rear-earth-doped M-type strontium ferrite magnetic material and preparation method thereof - Google Patents
A kind of rear-earth-doped M-type strontium ferrite magnetic material and preparation method thereof Download PDFInfo
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Abstract
The invention discloses a kind of ferritic preparation methods of the M-type strontium of doping.The present invention mainly solves the problems, such as that existing ferrite magnetic performance is low.By adulterating Sm3+And Cu2+Joint replaces the Sr in strontium ferrite2+And Fe3+.According to molecular formula Sr1‑xSmxFe12‑xCuxO19Weigh a certain amount of Sm2O3、CuCO3·Cu(OH)2·H2O、SrCO3And Fe2O3As raw material, weighed raw material, abrading-ball and dehydrated alcohol quality are subjected to ball milling according to 10:1:0.5, will be dried after mixing tabletting and be sintered to obtain Preburning material.Second of ball milling will be carried out after Preburning material crushing grinding, and mixing tabletting is dried again after ball milling and is sintered.Preparation method of the invention belongs to solid phase method, and manufacture craft is simple, at low cost, and a kind of prepared ferritic magnetic property of M-type strontium improves a lot.
Description
Technical field
The invention belongs to technical field of magnetic materials, and in particular to a kind of M-type strontium ferrite magnetic material and its preparation side
Method.
Background technique
M type ferrite is a kind of high performance permanent magnetic materials, has wider hysteresis loop, higher coercivity, uniaxial magnetic
The features such as anisotropic crystalline and excellent gyromagnet characteristic, high-curie temperature, high chemical stability and high remanent magnetization, together
When cost performance with higher, therefore be widely used in the fields such as permanent magnetism, high-density perpendicular magnetic recording, microwave and millimeter wave device
In, it is widely used in industry and daily life.In recent years, with the raising of automobile, household electrical appliances, phonotape and videotape, computer Isoquant, with
And the development and utilization of the new energy such as wind energy, water energy, keep the demand of strontium barium permanent-magnet ferrite also increasing.M-type strontium barium iron oxygen
Body preparation research is initially concentrated mainly on the side such as the influence of synthesis in solid state mechanism, dynamic process and technological parameter to properties of product
Face, but go deep into research, the direction has excavated totally the raising of properties of product substantially, it is difficult to obtain magnetic property substantially
Raising.Therefore new formula series iron strontium oxide permanent magnetic material is developed, and then improves the magnetic property of permanent-magnet ferrite
Have become the hot spot of the area research.The performance of strontium ferrite is improved using rare earth ion doped substitution technique in recent years
As the hot spot of the area research, but numerous studies are concentrated mainly on La-Zn, La-Co system.
Summary of the invention
The invention aims to solve the problems, such as that existing M-type strontium Ferrite Material magnetic performance is poor, and propose one
Kind M-type strontium ferrite magnetic material and preparation method thereof.
The molecular formula of M-type strontium ferrite magnetic material of the present invention are as follows: Sr1-xSmxFe12-xCuxO19, in molecular formula: 0 < x
<0.2。
It is Sr that the present invention, which prepares molecular formula,1-xSmxFe12-xCuxO19M-type strontium ferrite magnetic material method press following step
It is rapid to carry out:
Step 1: according to molecular formula Sr1-xSmxFe12-xCuxO19In stoichiometric ratio weigh Sm2O3、CuCO3·Cu(OH)2·
H2O、SrCO3And Fe2O3As raw material, molecular formula Sr1-xSmxFe12-xCuxO19In: 0 < x < 0.2；
Step 2: raw material weighed in step 1, abrading-ball and dehydrated alcohol are placed in the ceramic ball grinder of planetary ball mill,
Revolving speed is that mixing 1h ~ 2h obtains mixed powder under 400r/min ~ 500r/min, and the drying of obtained mixed powder is placed on tabletting
Mold in, 2MPa ~ 4MPa pressure pushing sheet sample is made；The abrading-ball is hard alloy abrading-ball；The abrading-ball,
The mass ratio of raw material and dehydrated alcohol is 10:1:0.5；The temperature of the drying is 80 DEG C ~ 200 DEG C, and drying time is 4h ~ 8h；
Step 3: the sheet sample that step 2 is obtained is put into high temperature box type resistance furnace, with the heating speed of 5 DEG C/min ~ 10 DEG C
Rate is warming up to 1100 DEG C ~ 1200 DEG C, cools to room temperature with the furnace after then keeping the temperature 3h ~ 8h, obtains Preburning material；
Step 4: carrying out coarse crushing with steel alms bowl for the Preburning material that step 3 obtains and grind, then by Preburning material, the mill after grinding
Ball and dehydrated alcohol are placed in the ceramic ball grinder of planetary ball mill, revolving speed be 400r/min ~ 500r/min under mixing 4h ~
Mixing drying is placed in the mold of tabletting by 6h, and Preburning material sheet sample is made in the pressure pushing of 2MPa ~ 4MPa；Institute
Stating abrading-ball is hard alloy abrading-ball；The mass ratio of the abrading-ball, raw material and dehydrated alcohol is 10:1:0.5；The temperature of the drying
It is 80 DEG C ~ 200 DEG C, drying time is 4h ~ 8h；
Step 5: the Preburning material sheet sample that step 4 obtains is placed in high temperature box type resistance furnace, with 5 DEG C/min ~ 10 DEG C/
The heating rate of min is warming up to 1100 DEG C ~ 1200 DEG C, cools to room temperature with the furnace after then keeping the temperature 2h ~ 5h, finally obtains molecular formula
For Sr1-xSmxFe12-xCuxO19M-type strontium ferrite magnetic material.
The present invention have it is following the utility model has the advantages that
1, the raw materials used in the present invention SrCO3、CuCO3·Cu(OH)2·H2O and Fe2O3It is cheap, Sm2O3Raw material is easy to get and uses
Measure lower, therefore overall cost is lower, is suitable for industrialized production, and the method for the present invention preparation process is simple, energy consumption is lower；
2, the molecular formula that the present invention prepares is Sr1-xSmxFe12-xCuxO19M-type strontium ferrite magnetic material magnetic performance it is excellent
The M-type strontium ferrite magnetic material SrFe prepared under the conditions of same process12O19, remanent magnetizationBR increase by 35.28% ~
72.76%, coercivityHC increases by 37.86% ~ 79.33%, saturation magnetizationMS increases by 3.5% ~ 16.27%, i.e. inventive formulation body
System and method obtain the M-type strontium ferrite magnetic material of function admirable.
Detailed description of the invention
Fig. 1 is the X ray diffracting spectrum for applying the M-type strontium ferrite magnetic material of the preparation of example one；
Fig. 2 is the SEM figure for applying the M-type strontium ferrite magnetic material of the preparation of example one；
Fig. 3 is the X ray diffracting spectrum for applying the M-type strontium ferrite magnetic material of the preparation of example two；
Fig. 4 is the SEM figure for applying the M-type strontium ferrite magnetic material of the preparation of example two.
Specific embodiment
The technical solution of the present invention is not limited to the following list, further includes between each specific embodiment
Any reasonable combination.
Specific embodiment 1: a kind of M-type strontium ferrite magnetic material of present embodiment, the M-type strontium ferrimagnetism material
The molecular formula of material are as follows: Sr1-xSmxFe12-xCuxO19, in molecular formula: 0 < x < 0.2.
The Sr of present embodiment1-xSmxFe12-xCuxO19M-type strontium ferrite magnetic material magnetic performance be better than same process
Under the conditions of the M-type strontium ferrite magnetic material SrFe for preparing12O19, remanent magnetizationBR increases by 35.28 ~ 72.76%, coercivityHC increases by 37.86% ~ 79.33%, saturation magnetizationMS increases by 3.5% ~ 16.27%, i.e. present embodiment formula system obtains
The M-type strontium ferrite magnetic material of function admirable.
Specific embodiment 2: preparation molecular formula is Sr1-xSmxFe12-xCuxO19M-type strontium ferrite magnetic material side
Method sequentially includes the following steps:
Step 1: according to molecular formula Sr1-xSmxFe12-xCuxO19In stoichiometric ratio weigh Sm2O3、CuCO3·Cu(OH)2·
H2O、SrCO3And Fe2O3As raw material, molecular formula Sr1-xSmxFe12-xCuxO19In: 0 < x < 0.2；
Step 2: raw material weighed in step 1, abrading-ball and dehydrated alcohol are placed in the ceramic ball grinder of planetary ball mill,
Revolving speed is that mixing 1h ~ 2h obtains mixed powder under 400r/min ~ 500r/min, and the drying of obtained mixed powder is placed on tabletting
Mold in, 2MPa ~ 4MPa pressure pushing sheet sample is made；
Step 3: the sheet sample that step 2 is obtained is put into high temperature box type resistance furnace, with the heating speed of 5 DEG C/min ~ 10 DEG C
Rate is warming up to 1100 DEG C ~ 1200 DEG C, cools to room temperature with the furnace after then keeping the temperature 3h ~ 8h, obtains Preburning material；
Step 4: carrying out coarse crushing with steel alms bowl for the Preburning material that step 3 obtains and grind, then by Preburning material, the mill after grinding
Ball and dehydrated alcohol are placed in the ceramic ball grinder of planetary ball mill, revolving speed be 400r/min ~ 500r/min under mixing 4h ~
Mixing is placed in the mold of tabletting by 6h after drying, and Preburning material sheet sample is made in the pressure pushing of 2MPa ~ 4MPa；
Step 5: the Preburning material sheet sample that step 4 obtains is placed in high temperature box type resistance furnace, with 5 DEG C/min ~ 10 DEG C/
The heating rate of min is warming up to 1100 DEG C ~ 1200 DEG C, cools to room temperature with the furnace after then keeping the temperature 2h ~ 5h, finally obtains molecular formula
For Sr1-xSmxFe12-xCuxO19M-type strontium ferrite magnetic material.
1, the raw materials used SrCO of present embodiment3、CuCO3·Cu(OH)2·H2O and Fe2O3It is cheap, Sm2O3Raw material is easy
And dosage it is lower, therefore overall cost is lower, be suitable for industrialized production, and present embodiment method preparation process it is simple,
Energy consumption is lower；
2, the molecular formula that present embodiment is prepared is Sr1-xSmxFe12-xCuxO19M-type strontium ferrite magnetic material magnetics
It can be better than the M-type strontium ferrite magnetic material SrFe prepared under the conditions of same process12O19, remanent magnetizationBR increases
35.28% ~ 72.76%, coercivityHC increases by 37.86% ~ 79.33%, saturation magnetizationMS increases by 3.5% ~ 16.27%, i.e. this reality
It applies mode formula system and method obtains the M-type strontium ferrite magnetic material of function admirable.
Specific embodiment 3: present embodiment is unlike specific embodiment two: abrading-ball described in step 2 is hard
Matter Alloy Balls In Milling.Other steps and parameter are identical with embodiment two.
Specific embodiment 4: present embodiment is unlike specific embodiment two or three: abrading-ball described in step 2,
The mass ratio of raw material and dehydrated alcohol is 10:1:0.5.Other steps and parameter are identical as specific embodiment two or three.
Specific embodiment 5: unlike one of present embodiment and specific embodiment two to four: described in step 2
The temperature of drying is 80 DEG C ~ 200 DEG C, and drying time is 4h ~ 8h.Other steps and one of parameter and specific embodiment two to four
It is identical.
Specific embodiment 6: unlike one of present embodiment and specific embodiment two to five: described in step 4
Abrading-ball is hard alloy abrading-ball.Other steps and parameter are identical as one of specific embodiment two to five.
Specific embodiment 7: unlike one of present embodiment and specific embodiment two to six: described in step 4
The mass ratio of abrading-ball, raw material and dehydrated alcohol is 10:1:0.5.Other steps and one of parameter and specific embodiment two to six
It is identical.
Specific embodiment 8: unlike one of present embodiment and specific embodiment two to six: described in step 4
The temperature of drying is 80 DEG C ~ 200 DEG C, and drying time is 4h ~ 8h.Other steps and one of parameter and specific embodiment two to eight
It is identical.
Beneficial effects of the present invention are verified with following embodiment:
Embodiment 1:
The molecular formula of M-type strontium ferrite magnetic material described in the present embodiment are as follows: Sr0.85 Sm0.15Fe11.85Cu0.15O19；
The preparation method of M-type strontium ferrite magnetic material described in the present embodiment sequentially includes the following steps:
Step 1: according to molecular formula Sr0.85 Sm0.15Fe11.85Cu0.15O19In stoichiometric ratio weigh Sm2O3、CuCO3·Cu
(OH)2·H2O、SrCO3And Fe2O3As raw material；
Step 2: raw material weighed in step 1, abrading-ball and dehydrated alcohol are placed in the ceramic ball grinder of planetary ball mill,
Revolving speed is that mixing 1.5h obtains mixed powder under 500r/min, and the drying of obtained mixed powder is placed in the mold of tabletting,
Sheet sample is made in the pressure pushing of 3MPa；The abrading-ball is hard alloy abrading-ball；The abrading-ball, raw material and dehydrated alcohol
Mass ratio be 10:1:0.5；The temperature of the drying is 120 DEG C, drying time 6h；
Step 3: the sheet sample that step 2 is obtained is put into high temperature box type resistance furnace, is heated up with the heating rate of 5 DEG C/min
To 1100 DEG C, room temperature is cooled to the furnace after then keeping the temperature 6h, obtains Preburning material；
Step 4: carrying out coarse crushing with steel alms bowl for the Preburning material that step 3 obtains and grind, then by Preburning material, the mill after grinding
Ball and dehydrated alcohol are placed in the ceramic ball grinder of planetary ball mill, and the mixing 5h in the case where revolving speed is 500r/min dries mixing
It is placed in the mold of tabletting, Preburning material sheet sample is made in the pressure pushing of 3MPa；The abrading-ball is hard alloy mill
Ball；The mass ratio of the abrading-ball, raw material and dehydrated alcohol is 10:1:0.5；The temperature of the drying is 120 DEG C, and drying time is
6h；
Step 5: the Preburning material sheet sample that step 4 obtains is placed in high temperature box type resistance furnace, with the heating speed of 5 DEG C/min
Rate is warming up to 1100 DEG C, cools to room temperature with the furnace after then keeping the temperature 5h, and finally obtaining molecular formula is Sr0.85
Sm0.15Fe11.85Cu0.15O19M-type strontium ferrite magnetic material.
The test of XRD diffraction is carried out to M-type strontium ferrite magnetic material manufactured in the present embodiment, test results are shown in figure 1,
As seen from the figure: as substitution amount x=0.15, powder is in 2 θ=30.14 ° of the angle of diffraction, and 32.36 °, 34.32 °, 37.08 °.Etc. occur
Strong diffraction maximum, corresponding hexagonal phase (110) crystal face, (008) crystal face, (107) crystal face (114) crystal face, with pure M-type strontium iron oxygen
Body SrFe12O19Standard card and by pure M-type strontium ferrite SrFe made from one preparation method of embodiment12O19XRD diffraction pattern
It compares and coincide substantially, do not find other miscellaneous peaks, show that powder at this time is single M-type strontium ferrite phase.
SEM scanning is carried out to M-type strontium ferrite magnetic material manufactured in the present embodiment, it as a result as shown in Fig. 2, can by figure
See, the crystallite dimension in sample is between 1 μm ~ 3 μm, and the relatively uniform crystal grain boundary of crystal grain distribution is relatively clear, crystallite dimension
Uniformly, it is hexagonal plate structure, there are certain hole in sample, illustrates that the density of sample still has the space of promotion.
It is Sr to molecular formula manufactured in the present embodiment0.85 Sm0.15Fe11.85Cu0.15O19M-type strontium ferrite magnetic material
Carry out VSM test: remanent magnetizationBR=29.98emu/g, saturation magnetizationMS=50.07emu/g, coercivityHc=
36.9kA/m；It is SrFe according to method and technological parameter the preparation molecular formula of the present embodiment12O19 M-type strontium ferrimagnetism material
Expect and pass through VSM to test to obtain remanent magnetizationBR=17.87emu/g,MS=48.17emu/g,HC=22.91kA/m, thus
It is found that molecular formula manufactured in the present embodiment is Sr0.85Sm0.15Fe11.85Cu0.15O19M-type strontium ferrite magnetic material with it is existing
Molecular formula be SrFe12O19 M-type strontium ferrite magnetic material compare, remanent magnetizationBR increases by 66.77%, saturated magnetization
IntensityMS increases by 3.94%, coercivityHC increases by 61.07%.
Embodiment 2:
The molecular formula of M-type strontium ferrite magnetic material described in the present embodiment are as follows: Sr0.95Sm 0.05Fe11.95Cu0.05O19；
The preparation method of M-type strontium ferrite magnetic material described in the present embodiment sequentially includes the following steps:
Step 1: according to molecular formula Sr0.95Sm 0.05Fe11.95Cu0.05O19In stoichiometric ratio weigh Sm 2O3、CuCO3·Cu
(OH)2·H2O、SrCO3And Fe2O3As raw material；
Step 2: raw material weighed in step 1, abrading-ball and dehydrated alcohol are placed in the ceramic ball grinder of planetary ball mill,
Revolving speed is that mixing 1.5h obtains mixed powder under 500r/min, and the drying of obtained mixed powder is placed in the mold of tabletting,
Sheet sample is made in the pressure pushing of 3MPa；The abrading-ball is hard alloy abrading-ball；The abrading-ball, raw material and dehydrated alcohol
Mass ratio be 10:1:0.5；The temperature of the drying is 120 DEG C, drying time 6h；
Step 3: the sheet sample that step 2 is obtained is put into high temperature box type resistance furnace, is heated up with the heating rate of 5 DEG C/min
To 1100 DEG C, room temperature is cooled to the furnace after then keeping the temperature 6h, obtains Preburning material；
Step 4: carrying out coarse crushing with steel alms bowl for the Preburning material that step 3 obtains and grind, then by Preburning material, the mill after grinding
Ball and dehydrated alcohol are placed in the ceramic ball grinder of planetary ball mill, and the mixing 5h in the case where revolving speed is 500r/min dries mixing
It is placed in the mold of tabletting, Preburning material sheet sample is made in the pressure pushing of 3MPa；The abrading-ball is hard alloy mill
Ball；The mass ratio of the abrading-ball, raw material and dehydrated alcohol is 10:1:0.5；The temperature of the drying is 120 DEG C, and drying time is
6h；
Step 5: the Preburning material sheet sample that step 4 obtains is placed in high temperature box type resistance furnace, with the heating speed of 5 DEG C/min
Rate is warming up to 1100 DEG C, cools to room temperature with the furnace after then keeping the temperature 5h, and finally obtaining molecular formula is Sr0.95Sm0.05Fe11.95Cu0.05O19M-type strontium ferrite magnetic material.
The test of XRD diffraction is carried out to M-type strontium ferrite magnetic material manufactured in the present embodiment, test results are shown in figure 3,
As seen from the figure: powder is in 2 θ=30.14 ° of the angle of diffraction, and 32.36 °, 34.32 °, 37.08 °.Etc. there is strong diffraction maximum, it is corresponding
Hexagonal phase (110) crystal face, (008) crystal face, (107) crystal face (114) crystal face, with pure M-type strontium ferrite SrFe12O19Standard card
Piece and by pure M-type strontium ferrite SrFe made from one preparation method of embodiment12O19XRD diffraction pattern compare substantially coincide, do not have
Other miscellaneous peaks are found, show that powder at this time is single M-type strontium ferrite phase.
SEM scanning is carried out to M-type strontium ferrite magnetic material manufactured in the present embodiment, it as a result as shown in figure 4, can by figure
See, the crystallite dimension in sample is between 1 μm ~ 2 μm, and the relatively uniform crystal grain boundary of crystal grain distribution is relatively clear, crystallite dimension
Uniformly, it is hexagonal plate structure, there are certain hole in sample, illustrates that the density of sample still has the space of promotion.
It is Sr to molecular formula manufactured in the present embodiment0.95Sm 0.05Fe11.95Cu0.05O19M-type strontium ferrite magnetic material into
Row VSM test: remanent magnetizationBR=30.65emu/g, saturation magnetizationMS=52.044emu/g, coercivityHc=
39.78kA/m；It is SrFe according to method and technological parameter the preparation molecular formula of the present embodiment12O19 M-type strontium ferrimagnetism material
Expect and pass through VSM to test to obtain remanent magnetizationBR=17.87emu/g, saturation magnetizationMS=48.17emu/g, coercivityHC=22.91kA/m, it follows that molecular formula manufactured in the present embodiment is Sr0.95Sm 0.05Fe11.95Cu0.05O19M-type strontium iron oxygen
Body magnetic material and existing molecular formula are SrFe12O19 M-type strontium ferrite magnetic material compare, remanent magnetizationBR increases
Add 71.52%, saturation magnetizationMS increases by 8.03%, coercivityHC increases by 73.64%.
Claims (8)
1. a kind of M-type strontium ferrite magnetic material, it is characterised in that the molecular formula of the M-type strontium ferrite magnetic material are as follows: Sr1- xSmxFe12-xCuxO19, in molecular formula: 0 < x < 0.2.
2. a kind of method for preparing M-type strontium ferrite magnetic material as described in claim 1, it is characterised in that this method according to
Following steps carry out:
Step 1: according to molecular formula Sr1-xSmxFe12-xCuxO19In stoichiometric ratio weigh Sm2O3、CuCO3·Cu(OH)2·
H2O、SrCO3And Fe2O3As raw material, molecular formula Sr1-xSmxFe12-xCuxO19In: 0 < x < 0.2；
Step 2: raw material weighed in step 1, abrading-ball and dehydrated alcohol are placed in the ceramic ball grinder of planetary ball mill,
Revolving speed is that mixing 1h ~ 2h obtains mixed powder under 400r/min ~ 500r/min, and the drying of obtained mixed powder is placed on tabletting
Mold in, 2MPa ~ 4MPa pressure pushing sheet sample is made；
Step 3: the sheet sample that step 2 is obtained is put into high temperature box type resistance furnace, with the heating speed of 5 DEG C/min ~ 10 DEG C
Rate is warming up to 1100 DEG C ~ 1200 DEG C, cools to room temperature with the furnace after then keeping the temperature 3h ~ 8h, obtains Preburning material；
Step 4: carrying out coarse crushing with steel alms bowl for the Preburning material that step 3 obtains and grind, then by Preburning material, the mill after grinding
Ball and dehydrated alcohol are placed in the ceramic ball grinder of planetary ball mill, revolving speed be 400r/min ~ 500r/min under mixing 4h ~
Mixing is placed in the mold of tabletting by 6h after drying, and Preburning material sheet sample is made in the pressure pushing of 2MPa ~ 4MPa；
Step 5: the Preburning material sheet sample that step 4 obtains is placed in high temperature box type resistance furnace, with 5 DEG C/min ~ 10 DEG C/
The heating rate of min is warming up to 1100 DEG C ~ 1200 DEG C, cools to room temperature with the furnace after then keeping the temperature 2h ~ 5h, finally obtains molecular formula
For Sr1-xSmxFe12-xCuxO19M-type strontium ferrite magnetic material.
3. the preparation method of M-type strontium ferrite magnetic material according to claim 2, it is characterised in that ground described in step 2
Ball is hard alloy abrading-ball.
4. the preparation method of M-type strontium ferrite magnetic material according to claim 2, it is characterised in that ground described in step 2
The mass ratio of ball, raw material and dehydrated alcohol is 10:1:0.5.
5. the preparation method of M-type strontium ferrite magnetic material according to claim 2, it is characterised in that dried described in step 2
Dry temperature is 80 DEG C ~ 200 DEG C, and drying time is 4h ~ 8h.
6. the preparation method of M-type strontium ferrite magnetic material according to claim 2, it is characterised in that ground described in step 4
Ball is hard alloy abrading-ball.
7. the preparation method of M-type strontium ferrite magnetic material according to claim 2, it is characterised in that ground described in step 4
The mass ratio of ball, raw material and dehydrated alcohol is 10:1:0.5.
8. the preparation method of M-type strontium ferrite magnetic material according to claim 2, it is characterised in that dried described in step 4
Dry temperature is 80 DEG C ~ 200 DEG C, and drying time is 4h ~ 8h.
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| CN111389242A (en) * | 2020-03-19 | 2020-07-10 | 上海大学 | Cobalt-free anti-CO2Poisoned high oxygen-permeable biphase oxygen-permeable membrane material, its preparation method and application |
| CN112159218A (en) * | 2020-09-23 | 2021-01-01 | 横店集团东磁股份有限公司 | Preparation method of low-cost high-performance permanent magnetic ferrite material |
| CN116178002A (en) * | 2023-03-09 | 2023-05-30 | 宜宾金川电子有限责任公司 | Preparation process of strontium ferrite pre-sintering material |
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Cited By (4)
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| CN111389242A (en) * | 2020-03-19 | 2020-07-10 | 上海大学 | Cobalt-free anti-CO2Poisoned high oxygen-permeable biphase oxygen-permeable membrane material, its preparation method and application |
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| CN116178002A (en) * | 2023-03-09 | 2023-05-30 | 宜宾金川电子有限责任公司 | Preparation process of strontium ferrite pre-sintering material |
| CN116178002B (en) * | 2023-03-09 | 2024-05-31 | 宜宾金川电子有限责任公司 | Preparation process of strontium ferrite pre-sintering material |
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