438 



TABLE 454.— DIELECTRIC CONSTANT AND LOSS TANGENT OF DIELECTRIC 



MATERIALS (continued) 



Materials 

 f. Cellulose derivatives 



(1) Acetates 



Tenite II 205 A H 2 19 . 

 (cellulose acetate) 

 (butyrate) 



(2) Nitrate 



Pyralin 20 



Temp. 

 °C 



Frequency, cycles per second 



(3) Ethyl cellulose 



Ethocel No. 2840* 



26 



27 



25 



g. Silicone resins 



DC 2101 22 25 



h. Polyvinyl resins 



Polyethylene DE-3401 23 ... 25 



Vinylite QYNA 24 20 



Saran B-115 25 23 



Lucite HM-119 28 23 



Polystyrene 27 25 



(commercially molded) 

 Sheet stock 



3. Elastomers 



Hevea rubber 28 25 



Gutta-percha 29 25 



GR-S (Buna S) 30 26 



compound 

 GR-I (Butyl rubber) 31 25 



Neoprene GR-M 32 26 



4. Natural resins 



Amber 33 25 



Shellac, natural XL 34 28 



5. Asphalts and Cement 



Plicene cement 35 25 



6. Waxes 



Apiezon wax "W" 36 22 



Beeswax, white 37 23 



Ceresin, white 38 25 



Paraffin wax 39 25 



132° ASTM 

 Sealing wax 40 25 



Red express 



7. Woods 



Balsa 26 



Fir, Douglas, plywood % 25 



Mahogany X 25 



1X10 2 lxlO 3 lxl( 



e'Ao 

 tan 5 



e'/en 

 tan 5 



e'/eo 

 tan 5 



e'/e 

 tan 5 



e'/eo 

 tan 5 



e'/eo 

 tan 5 



e'/eo 

 tan 5 



e'/eo 

 tan 5 



e'/eo 

 tan 5 



e'/e 

 tan 5 



e'/e n 

 tan 5 



e'/eo 

 tan 5 



e'/eo 

 tan 5 



e'/eo 

 tan 5 



t Field _|_ to grain. 



e'/eo 

 tan 5 



e'/eo 

 tanS 



e'/eo 

 tan 5 



e'/eo 

 tan 5 



e'/eo 

 tan 5 



e'/eo 

 tan 5 



e'/eo 

 tan 5 



e'/eo 

 tan 5 



3 54 

 78 



10.8 



6400 



3.90 



75 



2.9 



70 



2.26 

 <2 



3.18 

 130 



4.88 

 800 



3.20 

 620 



2.56 

 <5 



2.4 



28 



2.61 



5 



2.66 



7 



2.39 



34 



7.5 



8000 



e'/eo 2.7 



tan 5 12.5 



e'/eo 3.86 



tan 5 65 



e'/eo 2.48 



tan 5 43.9 



2.75 



186 

 2.65 



140 

 2.3 

 8 

 2.25 



<2 

 3.68 



249 



1.4 



50 

 2.1 

 115 

 2.42 



86 



3.50 

 107 



8.4 

 1000 



3.80 

 210 



2.9 

 56 



2.26 

 <2 



3.10 

 185 



4.65 

 630 



2.84 

 440 



2.56 

 <5 



2.4 

 18 

 2.60 



4 

 2.66 



9 



2.38 



35 



6.5 



860 



2.7 

 18 



3.81 

 74 



2.48 

 35.5 



2.69 



120 

 2.63 



118 

 2.3 

 6 

 2.25 



<2 

 3.52 



150 



1.4 

 40 

 2.1 



105 

 2.40 



120 



3.28 

 178 



3.40 

 275 



2.9 



45 



2.26 

 <2 



2.88 



160 

 3.18 



570 

 2.63 



145 

 2.56 



.7 



2.4 



18 

 2.53 



42 



2.56 



120 



2.35 



10 

 5.7 

 950 



2.65 



56 



3.47 



310 



2.48 

 25.5 



2.63 



25 



2.43 



84 



2.3 



4 



2.25 



<2 



3.29 



80 



1.37 

 120 

 1.90 

 230 

 2.25 

 250 



IX 10 s 1X10 10 



3.05 

 190 



6.6 5.2 

 640 1030 



3.20 

 240 



2.9 



45 



2.85 



81 



2.82 



180 



2.58 



67 



2.55 



<1 



2.4 



50 

 2.47 

 120 

 2.52 



95 

 2.35 



10 

 3.4 

 1600 



3.10 

 300 



2.47 

 15 



2.39 



60 



2.3 



4 



2.25 



<2 



3.2 



120 



1.30 

 135 



2.07 

 320 



3 32 

 1310 



2.26 

 3.6 



2.70 

 51 



2.57 

 49 



2.54 



4.3 



2.38 

 50 



2.44 

 50 



2.35 



2.35 

 6.8 



2.35 

 48 

 2.24 

 6.5 

 2.24 

 2.1 



1.20 

 83 



1.7 



210 



SMITHSONIAN PHYSICAL TABLES 



(continued) 



