Our speciality (MLT) low temperature glass range is made up of three main types of materials as described below. The range now includes both Pb glasses and Pb- free alternatives. Some of the most widely used materials included are bismuth based, alkali and vanadate glasses. Click on each tab to view relevant technical information and data on all the materials in this range.
Solder glasses, also referred to as frit glasses, are special glasses with a particularly low softening point (usually below 600°C). They are used to join glass to other glasses, ceramics, or metals without thermally damaging the materials to be joined. To ensure stress-free sealing, the coefficient of thermal expansion (CTE) needs to be closely matched to the sealing partners.
Three kinds of solder glasses can be distinguished according to their behaviour during the soldering process: Vitreous solder glasses, devitrifying solder glasses, and composite solder glasses.
Vitreous solder glasses: These materials can preserve their properties during soldering and remain in the so-called “glassy” state. When reheated, they show the same softening behaviour as prior to the sealing process.
Devitrifying solder glasses: These materials crystallise at least partially during the sealing process. Since this results in an increase of softening temperature, they are especially used in applications with high operating temperatures. The crystallization can lead to a change of CTE.
Composite solder glasses: These materials were historically developed to achieve a very low CTE while assuring low soldering temperatures at the same time. This is done by adding inert (non-reactive) fillers with low or negative coefficients of thermal expansion.
More detailed individual material datasheets are available on request, please email info@mansol-preforms.com
Glass Data Sheet L13 | |
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Code | L13 |
Coefficient of Expansion x 10-7 cm/cm°C (30° – 300°C) | 75 |
Dielectric Constant (1 MHz @ 25°C) | 71 |
Volume Resistivity Log (Ohm/cm) at 50°C | 9.8 |
Volume Resistivity Log (Ohm/cm) at 150°C | 7.0 |
Softening Point °C | 278°C |
Density g/cm2 | 7.57 |
Sealing Temperature °C | 320°C |
Colour | Dark Green |
Glass Data Sheet MLT4 | |
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Code | MLT4 |
Specific Gravity at 20°C | 5.83 |
Coefficient of Expansion x 10-6 cm/cm°C (25° – 260°C) | 8.4 |
Working Temperature | 380°C |
Softening Temperature | 350°C |
Annealing Point | 315°C |
Glass Data Sheet MLT5 | |
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Code | MLT5 |
Specific Gravity at 20°C | |
Coefficient of Expansion x 10-7 cm/cm°C (30° – 300°C) | 16.0 x 10-6 |
Softening Point | 440°C |
Sealing Temperature | 590°C |
Glass Data Sheet MLT9 | |
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Code | MLT9 |
Specific Gravity at 20°C | 6.70 |
Coefficient of Expansion x 10-6 cm/cm°C (25° – 260°C) | 12.0 x 10-6 |
Working Temperature | 380°C |
Softening Point | 340°C |
Transformation Point | 285°C |
Glass Data Sheet MLT10 | |
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Code | MLT10 |
Specific Gravity at 20°C | 4.20 – 4.25h/cm3 |
Coefficient of Expansion x 10-6 cm/cm°C (30° – 300°C) | 0.59 x 10-6 |
Softening Point | 360 – 380°C |
Sealing Temperature | 480 – 510°C |
Dielectric Constant (1 MHz @ 20°C) | 14.4 |
Tan | 0.0300 |
Glass Data Sheet MLT13 | |
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Code | MLT13 |
Coefficient of Expansion x 10-6 cm/cm°C (30° – 300°C) | 14.8 |
Softening Point °C | 300 – 320°C |
Density g/cm2 | N/A |
Sealing Temperature °C | 360 – 400°C |
Colour | Black |
Glass Data Sheet MLT16 | |
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Code | MLT16 |
Coefficient of Expansion x 10-6 cm/cm°C (30° – 300°C) | 11.8 – 12.8 |
Dielectric Constant (1 kHz @ 25°C) | 20 |
Volume Resistivity Log (Ohm/cm) at 50°C | |
Volume Resistivity Log (Ohm/cm) at 150°C | |
Softening Point °C | 300 – 310°C |
Density g/cm2 | 5.95 |
Sealing Temperature °C | 390 – 400°C |
Colour | Brown |
Glass Data Sheet MLT17 (Titanium) | |
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Code | MLT17 |
Specific Gravity at 20°C | 5.62 |
Coefficient of Expansion x 10-7 cm/cm°C (30° – 300°C) | 68 |
Annealing Temperature | 500°C |
Softening Point | 560°C |
Sealing Temperature | 750 – 800°C |
Maximum Service Temperature | 400°C |
Glass Data Sheet MLT18 | |
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Code | MLT18 |
Coefficient of Expansion x 10-6 cm/cm°C (30° – 300°C) | 8.5 |
Softening Point | 370°C |
Density g/cm2 | 6.2 |
Sealing Temperature | 400 – 420°C |
Colour | Brown |
Glass Data Sheet MLT19 (Titanium) | |
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Code | MLT19 |
Specific Gravity at 20°C | |
Coefficient of Expansion x 10-6 cm/cm°C (30° – 300°C) | 8.9 |
Annealing Temperature | 500°C |
Softening Point | 560°C |
Sealing Temperature | 730 – 770°C |
Glass Data Sheet MLT20 (Titanium) | |
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Code | MLT20 |
Specific Gravity at 20°C | 2 – 3 |
Coefficient of Expansion x 10-7 cm/cm°C (30° – 300°C) | 6 – 7 |
Annealing Temperature | 500°C |
Softening Point | 560°C |
Sealing Temperature | 700 – 750°C |
Data sheet to be confirmed, please contact us for further information info@mansol-preforms.com
Data sheet to be confirmed, please contact us for further information info@mansol-preforms.com
Data sheet to be confirmed, please contact us for further information info@mansol-preforms.com