1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 03 2012 05 07 N Status No usage or replacement N. Benipal, NA 2006 09 18 Revised Inserted 3.0; Deleted 3.3 & 4 1963 07 01 Released F6-1077 Controlled document at www.MATS Copyright 2012, Ford Global Technologies, LLC Page 1 of 2 MAGNET, S
2、INTERED CERAMIC FERRITE ESF-M99G42-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is composed of ceramic ferritic substances. This material can be molded and sintered to a desired shape and magnetized to produce a permanent magnet. 2. APPLICATION This specificati
3、on was released originally for material used as the field magnet on small motors. 3 REQUIREMENTS Material specification requirements are to be used for initial qualification of materials. 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Com
4、panys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.1 GENERAL 3.1.1 Specific Gravity, min 4.2 3.1.2 Reversible Magnetic Temperature Coefficient, max Loss: 34% of the room temperature reading (23 +/- 2 C). Test Method: On an Indiana General (PMT 400) or equivalent production line
5、 permanent magnet tester: . Read gauss (Br) at 23 +/- 2 C. . Raise material to 191 C and read (Br). Loss should not exceed 34% of room temperature reading. . Cool to 23 +/- 2 C and read (Br). Readings should be identical to original readings. 3.1.3 Permeability Approx. Unity 3.2 PART 3.2.1 Magnet Sh
6、all conform to engineering specification note on engineering drawing. ENGINEERING MATERIAL SPECIFICATION ESF-M99G42-A Copyright 2012, Ford Global Technologies, LLC Page 2 of 2 3.2.2 Mechanical Radial breaking strength, crushing strength etc., shall be specified on the engineering drawing. 5. GENERAL
7、 INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 CHEMICAL COMPOSITION Ba Fe12O19 (BaO - 6Fe2O3) Alternate: SrFe12O19 (SrO - 6Fe2O3) 5.2 The parts made from this material generally are received without magnetization and are charged in the yoke assembly. 5.3 REVERSIBLE MAGNETIC TEMPERATURE COEFFICIENT, max 0.20% loss per C.
