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Products List -- Presintered Ferrite Powder
Specification of BWC Dry Pressing Strontium Ferrite Magnetic Materials magnetic powder
BWC series Strontium Dry Pressing Ferrite Magnetic Powders are suitable for producing magnets by dry pressing. According to the requirement , such products can be classified as isotropic powder and anisotropic powder, anisotropic powder has better orientability. The strict quality control system ensures that the quality is stable and reliable. magnetic powder, magnetic powders, ferrite powder, presintered ferrite powder
 
1. BW series Dry Pressing Strontium Ferrite Material Properties

Type Br Hcb Hcj (BH)max Sintered density
Grade mT Gs KA/m Oe KA/m Oe KJ/m3 MGOe P(g/cm3)
BW-C1T 230 2300 150 1880 240 3010 9.50 1.19 4.6+/-0.2
BW-C2T 230 2300 155 1950 278 3500 9.60 1.20 4.6+/-0.2
BW-C3T 210 2100 150 1880 350 4400 9.00 1.13 4.6+/-0.2
BW-C1 370 3700 215 2700 231 2900 24.6 3.08 4.6+/-0.2
BW-C2 385 3850 219 2750 231 2900 26.0 3.27 4.6+/-0.2
BW-C3 395 3950 231 2900 235 2950 28.8 3.60 4.6+/-0.2
 
2. BWS series Dry Pressing Barium Ferrite Material Properties.

Trade Mark Material Characteristics of products Granularity Forming methods
Br(mT) bHc(kA/m) ihc(kA/m) (BH)max
(kJ/m3) 		SHR%  Pellets
(mm) 		Coarse
Powder
(¦Ìm) 		Fine powder
Typical Min Typical Min Typical Min Typical Min
BWS-1 BaFe12O19 225 220 143 139 215 199 7.96 7.56 15±1 6-12 3-6 0.80-0.90 Isotropic dry press
195 190 123 119 215 199 5.57 5.17 15±1
BWS-1R BaFe12O19 230 225 143 139 255 239 8.36 7.96 15±1 6-12 3-6 0.80-0.90
215 210 135 131 255 239 7.56 7.16 15±1
BWS-1A BaFe12O19 235 230 147 143 239 223 8.75 8.36 15±1 6-12 3-6 0.80-0.90
200 195 127 123 239 223 5.97 5.57 15±1
 
3.Procedure Summaries
There are 6 types of dry pressing ferrite powder for customers:BWC-C1, BWC-C2T, BWC-C3T, BWC-C1, BWC-C2. The procedure summaries for making magnet are as follows: magnetic powders
a. The necessary secondary additives have been added into the powder during the grinding process.Customers shall only add proper quantity of binders and lubricants. The powder must pass through 120 mesh sieve before pressing,so as binders to be uniformly distributed for better orientaton. magnetic powder, magnetic powders
b.Please take care of the cleaning of the equipments.Any other materials and impurity should not be mixed into the powder.
c.During pressing,the pressure required is >=5000N/cm2,and the magnetic field density is >7000 Oe(560KA/m).
d.The sintering temperature for reference is 1220OC to 1270 OC.Please note that the proper sintering temperature should be defined in accordance with the status of the sintered sample pill. magnetic powder, magnetic powders
 
Specifications of BWC Wet pressing Strontium Ferrite Magnetic Materials
BWC series strontium ferrite magnetic powders have been designed to produce all grades of hard ferrites.The users will make high quality magnets by adding the provided additives into the powders.Our highly automatic instruments and strict quality control system ensure that the quality is stable and reliable.
a. Material Properties
 
Trade Mark Material Characteristics of products Granularity Forming methods
Br(mT) bHc
(kA/m) 		ihc
(kA/m) 		(BH)max
(kJ/m3) 		SHR % Pellets
(mm) 		Coarse Powder (¦Ìm) Fine powder Min
Typical Min Typ.l Min Typ. Min Typ.
BWS-2.4B SrFe12O19 380 370 183 167 199 183 27.1 25.5 15.5±1   0.80-0.90 Anisotropic dry press
BWS-2.4 SrFe12O19 360 350 223 207 239 223 23.9 22.3 15.5±1 6-12 3-6 0.80-0.90
BWS2.4H SrFe12O19 340 330 255 239 279 255 21.5 19.9 15±1   0.80-0.90
BWS-2.4E SrFe12O19 320 310 239 223 318 294 19.1 17.5 15±1   0.80-0.90
BWS-2.5B SrFe12O19 400 390 191 175 199 183 30.2 28.7 15.5±1     0.80-0.90
BWS-2.5 SrFe12O19 380 370 233 207 239 223 27.1 25.5 15.5±1   0.80-0.90
BWS-2.5H SrFe12O19 360 350 263 247 302 279 23.9 22.3 15±1     0.80-0.90
BWS-2.5E SrFe12O19 340 330 255 239 342 318 21.5 19.9 15±1     0.80-0.90
BWS-2.5U SrFe12O19 320 310 239 223 398 374 19.1 17.5 15±1     0.80-0.90
BWS-3 BaFe12O19 390 380 159 151 163 155 28.7 27.1 12±1     0.90-1.00 Anisotropic wet press
BWS-4B SrFe12O19 410 400 191 175 199 183 31.8 30.2 13±1     0.80-0.90
BWS-4 SrFe12O19 390 380 231 215 239 223 28.7 27.1 13±1 6-12 3-6 0.80-0.90
BWS-4H SrFe12O19 370 360 259 243 279 263 25.5 23.9 13±1     0.80-0.90
BWS-4E SrFe12O19 350 340 259 243 318 294 23.1 21.5 12.5±1     0.80-0.90
BWS-5B SrFe12O19 430 420 191 175 199 183 35.0 33.4 13±1     0.75-0.85
BWS-5 SrFe12O19 410 400 231 223 239 231 31.8 30.2 13±1 6-12 3-6 0.75-0.85
BWS-5H SrFe12O19 390 380 283 267 302 279 28.7 27.1 13±1 6-12 3-6 0.75-0.85
BWS-5E SrFe12O19 370 360 279 263 342 318 25.5 23.9 12.5±1     0.75-0.85
BWS-5U SrFe12O19 350 340 263 247 398 374 23.1 21.5 12.5±1     0.75-0.85
BWS-6 SrFe12O19 410 400 271 255 279 263 31.8 30.2 12.5±1     0.70-0.80
BWS-6H SrFe12O19 400 390 294 279 318 294 30.2 28.7 13±1     0.70-0.80
 
*The shrinkage rate on vertical direction is about 13±0.5%
2.In case that the granular material is purchased from our company,the particle should be dry ground to 3-5¦Ìm at first,and then be wet ground in a sand grinding mill or ball mill to less than 1 ¦Ìm ,and then be wet pressed.If the coarse ground powder is bought,it can be wet ground directly.
1).Before grinding,the grinding mill should be cleaned thoroughly.And any materials from other factories or Impurity should not be mixed into our material. magnetic powder, magnetic powders
2).Along with the powder (granular powder,and coarse ground powder),we provide the secondary additives in separated bags,users should only add it into powder during grinding according to the requirement.
3.All the necessary secondary additives have been added into the fine powders(<1¦Ìm).So there is no need to add any other material,But two to three hours wet grinding is necessary for better distribution of particles.
4.During pressing,the moisture of slurry should be controlled between 32% to 37%,the pressure required is >4000N/cm2,and the magnetic field density is >560kA/m.
5.Due to the actual sintering temperature measured by various suppliers' instruments are not the same,we can only provide sintering temperature of 1220OC-1270OC for reference.Please note that the proper sintering temperature should be defined in accordance with the status of the sintered sample pill. magnetic powder, magnetic powders
 

Contact Information
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Tel: 86-574-87504597, 27788030
Fax: 86-574-87506907, 87506697
Mobile Phone: 13429382998
E-mail: thomas@bwmagnet.com
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