Technical Details of Sealing and Solder Glass Frits
SCHOTT offers more than 100 SCHOTT standard glass types, different wet/dry grinding methods, and patented technologies that come together to form a wide range of exceptionally durable glass powder products. SCHOTT translates specific physical and chemical requirements into tailor-made solutions for a variety of challenging applications.
Specifications
Please refer to the tables below to choose the right sealing glass for your desired combination of materials. SCHOTT has a wide range of sealing glasses available in a number of different grain sizes.
Sealing Glasses for High Temperature Applications
| Sealing Partner | SCHOTT Glass Number | CTE* (10-6/K for 20-300 °C) | Tg ( °C ) | Sealing temperature( °C ) | Maximum operating temperature ( °C ) |
|---|---|---|---|---|---|
| SiC | 8253 | 4.6 | 785 | 1320 | 735 |
| AIN | G018-200 | 4.6 | 557 | 665 | 550 |
| AI2O3 | G018-266 | 6.9 | 585 | 770 | 530 |
| G018-346 | 7.3 | 720 | 1270 | 670 | |
| G018-358 |
8.5 8.8** |
685 | 940 |
600 1040** |
|
| G018-385 |
8.4** | 992** | 950 | 950 °C ( 1000) | |
| ZrO2 | G018-339 | 9.2** | 627 | 990 | 760** |
| G018-311 |
9.1 9.9** |
622 | 850 |
560 880** |
*CTE = coefficient of thermal expansion **p.c. = partially crystalline
SOFC and SOEC Sealing Glasses
| Glass No. | α20/300)[ppm/K]* |
Tg [°C] | Dil. Ew [°C] | p [g/cm3] | Sealing temperature [ °C] | Sealing partners |
|---|---|---|---|---|---|---|
| GM31107 | 9.8 | 543 | 592 | 3.70 | 700 | Crofer, ITM, StS |
| G018-281 | 12.1 | 639 | > 850 | 2.70 | 1000 | CFY |
| G018-311 |
9.9 | 612 | 686 | 3.80 | 850 | Crofer, ITM, StS |
| G018-354 |
9.2 | 637 | 711 | 3.90 | 850 | Crofer, ITM, StS |
| G018-381 |
12.1 | 652 | > 850 | 2.30 | 950 | CFY |
| G018-385 |
8.4 | 992 | >1000 | 3.14 | 1000 | CFY |
*p.c. = partially crystalline
SCHOTT Solder Glasses
The choice of solder glass for joining different materials is dependent on four major aspects:
- Desired soldering temperature
- Thermal expansion of the materials to be joined
- Operation temperature of the final application
- Chemical behavior
Please refer to the table below for details on standard SCHOTT solder glass types. We have a wide range of solder glasses available in a number of different grain sizes.
| Glass No. | α(20/300) (10-6 x K-1) |
Tg [ °C ]* | Sealing temperature [ °C ] | Sealing temperature tholding [min] | Density [g/cm3] | tk100[ °C ] | tanδ [ 10-4 ] |
|---|---|---|---|---|---|---|---|
| Lead-containing | |||||||
| G017-002 | 3.7 | 545 | 700 | 15 | 3.6 | - | 37 |
| G017-339 |
4.7 | 325 | 510 | 15 | 4.3 | 11.5 | 19 |
| G017-712 |
5.3 | 375 | 510 | 10 | - | - | - |
| G017-393 |
6.5 | 320 | 425 | 15 | 4.8 | 11.6 | 15 |
| G017-340 |
7.0 | 315 | 420 | 15 | 4.8 | 13.4 | 14 |
| G018-228 |
7.6 | 311 | 400 | 15 | 5.0 | - | - |
| 8465 | 8.2 | 385 | 520 | 60 | 5.4 | 14.9 | 27 |
| G018-229 | 8.7 | 310 | 410 | 15 | 5.4 | - | - |
| G018-256 |
9.6 | 316 | 420 | 15 | 5.8 | - | - |
| G017-052 |
11.7 | 308 | 410 | 15 | 6.7 | - | - |
| Lead-free | |||||||
| G018-250 |
7.0 | 380 | 540 | 15 | 5.7 | - | - |
| G018-255 |
9.4 | 396 | 520 | 15 | 6.7 | - | - |
| 8470 | 10.0 | 440 | 680 | 60 | 2.8 | - | - |
| G018-249 |
10.1 | 365 | 500 | 15 | 7.1 | - | - |
All glass frits are available as K3 powder. Grain size: d50 = 10 +- αµm, d99 ≤ 63µm
Other grain sizes available upon request.
Antonio Trizzino
Sales Manager Europe