C1- Resin bonded material produced to close mechanical tolerances. Inexpensive but fairly low performance material. D1- Barium ferrite material. Pressed to required shape and sintered at about 1200(degree)C. It is subject to shrinkage in sintering and tolerances can therefore vary. Unmachined tolerances typically +-2%. Items can be precision machined to tighter tolerances if required. D2- Strontium ferrite material, similar to D1 in nature but more suited to use in d.c. motors or for toy and food use applications. Tolerances are similar to Barium ferrite. Neoplast Neodymium Irom Boron Resin Bonded Range A, B, C & D Formed from resin bonded isotropic material, components are manufactured compaction pressing to finished size and then heat cured to produce a mechanically strong component. Close mechanical tolerances are possible with this method, typically +-0.1 mm, cut items can be produced to tighter tolerances by subsequent machining. Arcs, rings, discs, segments and blocks can be produced by this method. Due to the reactive nature of neodymium iron boron compounds, we highly recommend that components are supplied covered with a protective coating to prevent corrosion. Neoflex Flexible Neodymium Iron Boron Sheet Manufactured by compounding the Magnequench material into nitrile rubber and subsequent pressing and vulcanising into sheets 300 mm2. Produced in thicknesses between 1.5 mm and 2.0 mm this material is easily cut or stamped to shape. Magnetic properties exceed those of hard ferrites and the ability to fabricate shapes is one advantage of this material.

Ferrite Magnets

Parameter		Symbol		Units		C1		D1		D2
Remanance		Br		Gauss Tesla		1475 0.147		2280 0.228		2200 0.220
Coercivity		Hc		Oersted A/m		1050 83000		1800 144000		1800 144000
Intrinsic Coercivity		IHc		Oersted		-		-		-
Energy Product		(BH)max		MGOE Joule/m		0.40 3200		1.00 8000		1.00 8000
Temperature Coefficient of Remanance		-		%/ºC		-0.15		-0.2		-0.2
Temperature Coefficient of Coercive Force		-		%/ºC		-		-		-
Max. Working Temperature		-		ºC		-		250		250
Curie Temperature		-		ºC		-		450		450

Bonded Neodymium Iron Boron
Parameter		Symbol		Units		A		B		C		D
Remanance		Br		Gauss Tesla		7500 0.750		8000 0.800		7500 0.750		8000 0.800
Coercivity		Hc		Oersted A/m		5700 450000		5400 430000		5700 450000		5400 430000
Intrinsic Coercivity		IHc		Oersted		15000		9000		16000		10500
Energy Product		(BH)max		MGOE Joule/m		8.75  -		9.50  -		8.75  -		9.50  -
Temperature Coefficient of Remanance		-		%/ºC		-0.13		-0.105		-0.070		-0.070
Temperature Coefficient of Coercive Force		-		%/ºC		-0.40		-0.40		-0.40		-0.40
Max. Working Temperature		-		ºC		125		125		150		150
Curie Temperature		-		ºC		305		360		470		470