Electronic Properties of Composite Materials by Maurice A. Leeds (auth.)

By Maurice A. Leeds (auth.)

Composites are the quickest growing to be category of structural fabric. for this reason, digital homes are usually tough to discover. This file used to be ready so as to current a compilation of trustworthy information at the digital and electric homes of composites. Composites provide a chance to tailor the houses to the appliance; an element that permits designers an enormous number of new fabrics for brand spanking new makes use of. it truly is this selection that has contributed to the quick progress of composites. houses of a composite could be of significant significance within the use or program of the cloth in a method. The fashion designer as a result, has to be in a position to receive the mandatory electric or digital estate info to lead him within the fabrics choice. it's the goal of this report back to support the dressmaker and engineer in enjoyable that requirement. homes This document offers a compilation of the main mostly required digital houses info of structural composites. Thermal homes usually impact electric layout; accordingly a number of of those homes are incorporated. the explicit houses tabulated are: Arc Resistance Thermal Conductivity Arc monitoring Resistance Linear Thermal enlargement Dielectric consistent Coefficient Dissipation issue electric (Volume) Resistivity electric (Volume) Conductivity different electric and thermal houses are compiled because the information was once made available.

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Z 41 . U Sl9 409 195 'OJ 91 107 IZO ... 55 >69 70 71 IS 0 . 004 '00 ZOO 100 400 soo 600 TOe Fiberglass laminate with 181 glass cloth and a pol yol eros s -linked polyimide resin, 8. 70 100°C 150°C 200°C 250°C 300°C * E glass 181 style fabric with A-llOO finish. 69 x 10- 5 * E glass style 7781 fabric ** E glass style 181 fabric with A-llOO finish *** S-994 glass roving 60 Ref. 35 GHz. 37 GHz U seconds 244 * E glass ** D glass 62 Ref. 57 FIBERGLASS-TEFLON RT/duroid 5870 is a polytetrafluoroethylene laminate reinforced with randomly oriented microglass fibers.

40 / 1 1 160 120 TEMPERATURE(OC) Dielectric constant and loss angle vs. temperature at various frequencies. Glass chopped-strand-mat-polyester laminate. Ref. 16 Filled Glass Mat Laminates Electrical Properties * Arc Resistance, sec ..... , volts/mil. , volts/mil. , kv.. ........ , kv .... Dielectric Strength, wet. , volts/mil.. , kv. .. , kv. ... Power Factor, 100 cycles, 'Yo ..... ])i('lcctrie Constant ....... Volume I{esistivity, ohm-em. Surface Resistivity, ohm ........ Insulation Resistance, ohm ....

At 8,500 - 10,000 megacycles (2). Oll (1) - California Chemical Company, Chevron 6100 - 85 pbw/DAIP - 15 pbw. (2) - Tested according to MIL-R-25042A (3) - Laminate from pretreated 181-150 Garan finish cloth, 12 ply, 1/8 inch laminate, 70% glass. f:g;; z VJ -' Z W 0 -0 Ref. 30 u :1 o. c::. 40 / 1 1 160 120 TEMPERATURE(OC) Dielectric constant and loss angle vs. temperature at various frequencies. Glass chopped-strand-mat-polyester laminate. Ref. 16 Filled Glass Mat Laminates Electrical Properties * Arc Resistance, sec .....

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