Dielectric Properties

Material Diel. constant

60 Hz

Diel. constant

1 MHz

Diel. Strentgh
  e tan delta e tan delta V/mil
Aluminum Oxide 8.8 3.3(-4) 8.8 320 320
Barium Titanate 1250 .056 1143 .0105 75
Soda-Borosilicate Glass 4.97   4.84 3.6(-3) 400
Epoxy (Epon RN-48) 4.5 .05 3.52 .01 400
Polycarbonate 3.17 .009 2.96 .01 400
Acrylic 4.0 .016 2.55 .009 400
Polymimide 3.4 .002 3.4 .003 570
Polyvinyl Chloride 3.2 .0115 2.88 .016 400
PTFE (Teflon) 2.1 <5(-4) 2.1 <2(-4) 550
Nylon 8 4.1 3.4 .04 350
Polyethylene 2.26 2(-4) 2.26 <2(-4) 450
Polypropylene 2.55 <5(-4) 2.55 <2(-4) 650
Paper 3.3 .010 2.99 .038 200
           

Some Magnetic Material Properties

Material Sat. Flux kG Res. Flux kG Init. perm DC Max perm DC Resistivity
Metglas 2605SC 16.1 14.2 8000 300000 142(-6)
Metglas 2605CO 18 16 5000 250,000 160(-6)
3% Si-Fe 16.5 14-15 500 25,000 50(-6)
Permalloy 7.5 6.0 20,000 150,000 45(-6)
50% Ni-Fe 16.0   2,500 25,000 45(-6)
NiZn Ferrite TDK PE11B 3.5 2.9 2,000   1(11)
Ferroxcube 4C4 3.0 2.7 125 350  
MnZn Ferrite Ceramic Magnetics MN80 5.0 2.5 1,500 5,000 200

From Pulse Power Formulary by R.J. Adler