INORGANIC MATERIALS

OKUNO: Lead-free glass powder
for electronic materials [Specification sheet]

Series Product name Composition※1,2 Thermal properties Specific
gravity		 Electric properties Water
resistance※11		 Acid resistance※12 Alkaline resistance※13 Application examples
CTE※3 Tg※4 Yp※5 Ts※6 Tw※7 Tc※8 Dielectric
constant※9		 Migration test※10 (25℃) (50℃) (25℃) (50℃)
(×10-7) (℃) (℃) (℃) (℃) (℃) ε Total evaluation Initial value After 96hours Total evaluation 2hours 2hours Total evaluation 2hours 2hours
Bismuth glass GF3410 Bi2O3-ZnO-B2O3 108 362 388 414 424 472 6.9 22.8 △ 4.98×109 1.05×109 △ × 13.3% - × 0.1% 7.5% Sintering aid materials, sealing
GF3440 Bi2O3-ZnO-B2O3 97 387 411 439 452 574 6.6 20.8 △ 2.08×1010 6.51×1012 △ × 16.5% - × 0.1% 8.9% Sealing
GF3470 Bi2O3-ZnO-B2O3 89 426 454 475 488 622 5.9 16.8 ○ 1.06×1013 2.38×1013 △ × 16.8% - × 0.0% 8.8% Sealing
GF3500 Bi2O3-SiO2-B2O3 83 440 477 495 511 644 6.1 16.9 ◎ 2.50×1013 3.20×1013 ○ × 8.6% - △ 0.2% 1.2% Overcoating, sintering aid materials, sealing
GF3520 Bi2O3-ZnO-B2O3 77 445 490 518 530 - 5.7 14.9 ◎ 1.40×1013 1.60×1012 ○ × 19.1% - △ 0.1% 1.3% Overcoating, sintering aid materials, sealing
GF3535 Bi2O3-SiO2-R2O 84 454 500 535 555 670 4.9 14.3 × 1.68×109 NG ○ ○ 0.6% 1.6% ◎ 0.0% 0.0% Sintering aid materials, sealing
GF3545 Bi2O3-SiO2-R2O 88 460 504 548 570 - 4.0 11.0 × 5.82×108 NG ○ ◎ 0.0% 0.0% ◎ 0.0% 0.0% Sintering aid materials
GF3555 Bi2O3-SiO2-B2O3 65 480 520 550 566 - 4.4 11.7 ◎ 7.15×1011 2.90×1012 ○ × 22.2% - △ 0.2% 2.4% Overcoating
GF3550 Bi2O3-SiO2-R2O 84 465 518 560 580 - 3.9 9.9 × 6.38×108 NG ◎ ◎ 0.0% 0.0% ◎ 0.0% 0.0% Sintering aid materials
GF3575 Bi2O3-SiO2-B2O3-R2O 80 486 532 575 594 - 4.6 10.8 ◎ 5.50×1012 2.20×1011 ◎ ◎ 0.0% 0.0% ◎ 0.0% 0.0% Overcoating
GF3580 Bi2O3-SiO2-B2O3 68 505 547 578 594 731 5.2 12.1 ◎ 7.05×1012 1.13×1012 ◎ ○ 0.3% 5.1% ◎ 0.1% 0.1% Overcoating
ProGlass HE-10068 Bi2O3-SiO2-ZnO-R2O 106 441 - 569 595 684 3.4 8.7 × 8.00×107 NG △ × 29.4% - ◎ 0.0% 0.1% Overcoating
ProGlass HE-13065 Bi2O3-SiO2-ZnO-R2O 132 431 - 582 605 644 3.4 - × 1.00×108 NG △ × 23.1% - ○ 0.2% 0.6% Overcoating
GF3605 Bi2O3-SiO2-R2O 80 440 490 605 621 688 4.2 10.4 ○ 6.00×1010 7.00×1010 ◎ ○ 0.5% 1.4% ◎ 0.0% 0.1% Overcoating
GF3650 Bi2O3-SiO2-B2O3 58 551 604 645 669 787 4.3 10.7 ◎ 2.45×1012 2.13×1012 ◎ ○ 0.1% 0.6% ◎ 0.0% 0.0% Sintering aid materials
Zinc glass GF4530 ZnO-SiO2-B2O3-R2O 84 431 480 530 545 610 3.0 7.3 × 1.75×109 NG × × 25.3% - ◎ 0.0% 0.1% Sintering aid materials, sealing
GF4580 ZnO-SiO2-B2O3-R2O 95 - - 540 570 620 2.8 7.4 × 4.13×109 NG ◎ △ 1.9% 3.5% ◎ 0.0% 0.0% Sintering aid materials
GF4525 ZnO-SiO2-B2O3-R2O 88 476 540 543 564 644 2.8 7.7 × 6.35×108 NG ◎ × 3.5% - ◎ 0.0% 0.0% Sintering aid materials, sealing
GF4560 ZnO-SiO2-B2O3-R2O-RO 105 460 515 550 570 635 3.7 9.0 × 8.88×108 NG △ × 45.4% - ○ 0.1% 0.5% Sintering aid materials
GF4550 ZnO-SiO2-B2O3-R2O 80 480 530 575 595 - 3.0 7.9 × 7.73×109 NG ◎ ◎ 0.2% 0.2% ◎ 0.0% 0.0% Overcoating
GF4575 ZnO-SiO2-B2O3-R2O 54 512 540 579 594 669 3.4 8.0 ○ 2.06×1013 1.40×1010 △ × 31.9% - ◎ 0.0% 0.0% Overcoating
ProGlass LE-1064 ZnO-SiO2-B2O3-R2O 10 475 - 584 608 649 2.4 9.6 × 8.00×109 NG △ × 16.7% - △ 0.3% 1.3% Overcoating, sintering aid materials
ProGlass LE-0565 ZnO-SiO2-B2O3-R2O 1 482 - 607 623 660 2.3 7.6 × 1.40×1010 NG △ × 12.4% - △ 0.5% 1.0% Overcoating, sintering aid materials
GF4610 ZnO-SiO2-B2O3-RO 60 550 595 630 642 - 3.3 8.1 ◎ 4.80×1011 2.38×1013 ○ × 18.7% - ◎ 0.0% 0.0% Overcoating
GF4630 ZnO-SiO2-B2O3 43 553 592 631 650 750 3.7 9.3 ○ 2.00×1012 7.00×1011 ◎ × 36.5% - △ 0.6% 0.9% Overcoating, sintering aid materials
ProGlass LE-1075 ZnO-SiO2-B2O3-R2O 12 507 - 697 725 754 2.1 6.8 × 1.00×1010 NG △ ○ 0.8% 1.4% ○ 0.0% 0.3% Overcoating, sintering aid materials
Silica glass GF5600 SiO2-B2O3-R2O 75 480 550 600 625 860 2.6 7.8 × 9.40×109 NG ○ ◎ 0.0% 0.0% ◎ 0.0% 0.0% Overcoating, sintering aid materials
GF5640 SiO2-B2O3-R2O 81 542 590 630 655 - 2.7 7.5 × 7.53×108 NG ◎ ◎ 0.0% 0.0% ◎ 0.0% 0.0% Sintering aid materials
GF5770 SiO2-B2O3-ZrO2-R2O 64 620 690 740 790 - 2.7 8.4 ○ 2.80×1011 4.70×1011 ○ ◎ 0.0% 0.1% ◎ 0.0% 0.0% Overcoating
GF5780 SiO2-B2O3-RO 56 670 740 780 805 - 2.9 5.1 ◎ 1.90×1012 3.50×1012 ◎ ◎ 0.0% 0.0% ◎ 0.0% 0.0% Overcoating, sintering aid materials
GF5800 SiO2-B2O3-RO 70 697 750 825 841 - 3.3 8.4 ◎ 8.00×1011 2.80×1012 ◎ ◎ 0.0% 0.1% ○ 0.0% 0.4% Glaze
  • 1: R2O (in Composition) ; Li2O, Na2O and K2O collectively.
  • 2: RO (in Composition) ; MgO, CaO, BaO and SrO collectively.
  • 3: CTE ; Coefficient of thermal linear expansion (×10-7)
  • 4: Tg ; Transformation temperature of glass
  • 5: Yp ; Yielding point of glass
  • 6: Ts ; Temperature of softening
  • 7: Tw ; Temperature of working
  • 8: Tc ; Temperature of crystallization
  • 9: Dielectric constant ; We have adoped the analysis by an impedance measuring equipment at a room-temperature, with 1MHz
  • 10: Migration test ; Applying an interdigitated array pattern (electrodes) on an alumina substrate, then we operate an overcoat. After putting the sample into a pressure cooker, hold them for 96 hours at 121℃, two atmospheric pressure, with 95 % of humidity and 50-volt direct current. Next, measuring insulation resistance of each treated sample.
  • 11: Water resistance ; We have evaluated the water resistance of each product by using the following samples; sample A … the dispersion comprising one product and water, sample B … the finished glass frits after drying.
  • 12: Acid resistance ; After firing treated sample pieces, we have dipped the samples into 10 % by volume of sulfuric acid solution. Then, we have kept the sample in the solution for two hours (at 25℃) and two hours (at 50℃) respectively. Taking the sample from the solution, we have determined the sample weight to find the weight loss by dipping. The weight loss is indicated by volume percentage.
  • 13: Alkali resistance ; After firing treated sample pieces, we have dipped the samples into 4 % by weight of sodium hydoxide solution. Then, we have kept the sample in the solution for two hours (at 25℃) and two hours (at 50℃) respectively. Taking the samples from the solution, we have determined the sample weight to find the weight loss by dipping. The weight loss is indicated by volume percentage.