Specification of MGC Brand Wet Pressing Strontium Ferrite Magnetic Materials

  MGC Brand 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.

Ⅰ.Material Properties

No.	Br		Hcb		Hcj		(BH)max		Density	Shrinkage %
TRAD MARK	mT	Gs	kA/m	Oe	kA/m	Oe	kJ/m^3	MGOe	ρ(g/cm^3)	垂直方向(┴)
MGC28	390	3900	220	2760	230	2890	28.0	3.50	4.8	13±0.5
MGC29	370	3700	270	3390	318	4000	26.1	3.28	4.8	13±0.5
MGC30	390	3900	231	2900	235	2950	28.7	3.60	4.8	13±0.5
MGC30B	410	4100	200	2510	207	2600	31.2	3.90	4.8	13±0.5
MGC29H	360	3600	271	3400	382	4800	24.0	3.01	4.8	13±0.5
MGC31	410	4100	231	2900	235	2950	32.6	4.09	4.9	13±0.5
MGC32	380	3800	279	3500	318	4000	26.2	3.29	4.8	13±0.5
MGC33	400	4000	267	3350	279	3500	30.3	3.80	4.9	13±0.5
MGC34	420	4200	223	2800	227	2850	33.6	4.20	4.9	13±0.5
MGC35	400	4000	290	3640	318	4000	31.2	3.90	4.9	13±0.5
MGC35B	420	4200	255	3200	263	3300	34.4	4.30	4.9	13±0.5
MGC36	410	4100	300	3770	350	4400	32.8	4.1	4.9	11.5±0.5
MGC36B	425	4250	290	3640	318	4000	35.2	4.4	4.9	11.5±0.5
MGC36H	390	3900	302	3790	382	4800	28.9	4.9	4.9	11.5±0.5

Ⅱ.Procedure Summaries

  1.In case that the granular materials is purchased from our company, the particle should be dry ground to 3-5μm at first, and then be wet ground in a sand grinding mill or ball mill to less than 1μm, 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 material from other factories or impurity should not be mixed into our material.
  (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.

  2.All the necessary secondary additives have been added into the fine powders (<1μm). So there is no need to add any other material. But two to three hours' wet grinding is necessary for better distribution of particles.
3.During pressing, the moisture of slurry should be controlled between 32% to 37%. the pressure required is >4000/cm², and the magnetic field density is >560 kA/m.
  4.Due to the actual sintering temperature measured by various suppliers' instruments are not the same, we can only provide sintering temperature of 1220°C-1270°C for reference. Please note that the proper sintering temperature should be defined in accordance with the status of the sintered sample pill.

Ⅲ.Demagnetized Curves

■ MGC31  32.6kJ/m^3 ■ MGC32  26.2kJ/m^3 ■ MGC33  30.3kJ/m^3 ■ MGC34  33.6kJ/m^3 ■ MGC35  31.2kJ/m^3 ■ MGC35B  34.4kJ/m^3

　

0555-2485034,2499341

0555-2477128,2499341

mgczsb@mgkmag.com

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MAANSHAN GAOKE MAGNETIC MATERIAL CO., LTD.
ADD: 139 Huashan Road, Maanshan, Anhui, China  POST CODE: 243000
GENERAL MANAGER: Zou Sanbao