Silver-filled epoxy

EM-Tec conductive silver epoxies enable embedding and cementing specimen and parts providing high conductivity and good mechanical strength. When the epoxy is cured, the specimen can undergo further preparation steps such as polishing, lapping, thinning etc. Epoxies are not suitable for soldering, but they create highly conductive contacts. EM-Tec silver filled epoxies are a two-component system supplied in two syringes. To improve conductivity and to make mixing easy, both components are silver loaded.

The EM-Tec range of high-end silver filled conductive epoxies include:

EM-Tec AG29D fast setting, extreme conductivity silver epoxy, 19g supplied in two syringes
EM-Tec AG30 long pot life, extreme conductivity silver epoxy, 21g supplied in two syringes
EM-Tec AG31 fast setting, conductivity silver epoxy, 14g supplied in two syringes
EM-Tec AG32 long pot life, high conductivity silver epoxy, 15g supplied in two syringes

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EM-Tec AG29D fast setting, extreme conductivity, silver filled epoxy

EM-Tec AG29D fast-setting conductive silver filled epoxy combines excellent conductivity, good thermal conductivity, good mechanical strength and a relatively low curing temperature. Gives a 20-minute working window and cures in 20 minutes at a relatively low curing temperature of 65°C. At room temperature (20°C) the curing time is five hours. Excellent choice for high end applications where excellent conductivity is needed. The low curing temperature of 65°C provides compatibility with temperature sensitive materials or devices. Easy mixing ratio of 1:1 by volume.

EM-Tec AG30 long pot life, extreme conductivity silver filled epoxy

EM-Tec AG30 conductive silver filled epoxy combines excellent conductivity, good thermal conductivity, good mechanical strength, long pot life and relatively low curing temperature. Excellent choice for high end applications where excellent conductivity is needed. The low curing temperature of 65°C provides compatibility with temperature sensitive materials or devices. Easy mixing ratio of 1:1 by volume.

EM-Tec AG31 fast setting, conductive silver-filled epoxy

EM-Tec AG31 is a fast-setting silver filled epoxy and ideal when time is the limiting factor. Gives a 10 minute working window and cures in 15 minutes at the relatively low curing temperature of 65°C. Conductive and mechanical properties will be sufficient for most for non-critical applications. The EM-Tec AG31 represents the most economical silver-filled epoxy. It should not be used for applications where shrinkage is a limiting factor. Easy mixing ratio of 1:1 by volume.

EM-Tec AG32 long pot life, conductive silver-filled epoxy

EM-Tec AG32 conductive silver filled epoxy is an all-round long pot life type epoxy for applications where extreme conductivity and/or highest thermal conductivity are not needed. This is the strongest of the four conductive epoxies and should be used where mechanical strength is needed. This is the best conductive epoxy for cross-sectioning. Easy mixing ratio of 1:1 by volume.

EM-Tec silver filled conductive epoxies – specifications

Epoxy type	EM-Tec AG29D	EM-Tec AG30	EM-Tec AG31	EM-Tec AG32
Product code	15-002429	15-002430	15-002431	15-002433
Pot life	20 minutes	4 hours	10 minutes	4 hours
Electrical conductivity	0.0010 ohn.cm	0.0007 ohm.cm	0.0174 ohm.cm	0.006 ohm.cm
Thermal conductivity @ 25°C @ 50°C @ 100°C	1.63 W/(m.K) 1.79 W/(m.K) 1.65 W/(m.K)	1.748 W/(m.K) 1.750 W/(m.K) 1.684 W/(m.K)	0.903 W/(m.K) 0.893 W/(m.K) 0.813 W/(m.K)	0.850 W/(m.K) 0.826 W/(m.K) 0.961 W/(m.K)
Hardness Shore	83D	73D	75D	73D
Density	3.3 g/cm3	2.82 g/cm3	2.44 g/cm3	2.19 g/cm3
Silver content	~ 76%	~ 75%	~ 67%	~ 65%
Outgassing (curing)	0.15%	0.03%	0.16%	0.04%
Vacuum compatibility	Medium	Good	Medium	Good
Compression strength	21 MPa	35.9 MPa	13 Mpa	64.6 MPa
Tensile strength	6.3 Mpa	8.9 MPa	6.28 Mpa	13.5 MPa
Cure time @ 22°C Cure time @ 65°C Cure time @ 100°C	5 hours 20 minutes 12 minutes	96 hours 120 minutes 60 minutes	24 hours 15 minutes 11 minutes	96 hours 120 minutes 50 minutes
Minimum temperature	-55°C	-40°C	-55°C	-40°C
Maximum temperature	+150°C	+150°C	+150°C	+150°C
Weight (in 2 syringes)	19g	21g	14g	15g
Mixing ratio	1:1 by volume	1:1 by volume	1:1 by volume	1:1 by volume
Shelf life @ 20°C	> 3 years	> 2 years	> 2 years	> 2 years