Diemat, Inc. | Low-Temperature Sealing Glass Selection Guide

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LOW-TEMPERATURE SEALING GLASS SELECTION GUIDE - PREFORMS

	LOW TEMPERATURE		LEAD-FREE
	DM2700PF Series		DM2900PF Series
	DM2700PF	DM2760PF	DM2995PF
TYPICAL PROPERTIES
Sealing Temperature, °C	350	400	500
Glass Transition Temperature (Tg), °C	215	260	362
Average Coefficient of Thermal Expansion (25 to 150°C), ppm/°C	7.5	7.5	6.4
Density of Glass, g/cc	7.6	7	5.4
Helium leak rate, ATM-cc/sec	10^-8	10^-8	10^-9

FEATURES
Pb-free glass
No fiber or lens metallization required
Replaces solder sealing
Air processing, no flux
Fatigue, corrosion, and creep resistant			TBD
High adhesion to most surfaces, including gold
No outgassing during seal or product life
Moisture resistant: dry-box storage not required

TYPICAL APPLICATIONS
Telecom - optical fiber sealing in ferrules
Ribbon fiber
Fiber couplers/splitters
V-groove assemblies
Lenses
Lids and windows
Via hole sealing
Sensor sealing

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