金屬封裝用粗顆粒玻璃粉

產品說明

Granulated Glass for Metal Packages

Granulated glasses are used extensively for sealing stems and leads, and for part support in metal packages. Owing to their free flow characteristics,they have excellent workability in the tablet forming process.

Glasses for matching seals are used with Kovar stems and leads, while those for compression seals are used with iron or stainless steel stems and leads ofiron-nickel, iron-chrome alloys or Kovar.

Glasses for part support are used for stand-off.

 

Properties

 Usage Seal Part Support
Compression Seal Matching Seal Stand off
Glass Code ST-W/K ST-4W/K FN-13W/K BH-W/K BH-7W/K BH-8W/K BH-14W/K ST- 4F/K BH-FW/K
Particle size
 		 D50 μm 135 130 110 135 135 135 135 120 125
D99 μm 265 250 215 265 265 265 265 235 245
Firing temperature:T1 ℃ 650-660 680-690 700-710 670-680 730-750 650-660 750-800
Sealing temperature:T2 ℃ 960 980 930 980 960 1050
Coefficient of thermal expansion
 30-380℃ ×10-7/K 95 95 75.5 45.5 49.5 62.5 31.5 94 57
Density ×103kg•m3 2.58 2.60 2.51 2.28 2.32 2.38 2.13 2.65 2.83
Transformation point ℃ 450 460 510 470 505 510 - 460 515
Deformation point ℃ 510 520 570 550 565 570 - 520 635
Strain point ℃ 420 427 480 435 472 475 - - -
Annealing point ℃ 460 472 517 480 513 520 - - -
Softening point ℃ 663 672 687 698 715 685 782 - -
Working point ℃ 980 1030 990 1050 1130 990 1090 - -
Dielectric constant 1MHz,25℃   6.4 6.5 6.3 5.0 5.5 5.8 4.0 6.7 6.4
tan δ 1MHz,25℃ 10-4 22 21 32 30 39 37 3 24 31
Volume resistivity
Log ρ
 150℃ Ω•cm 11.4 11.2 11.2 11.5 10.8 11.1 15.5 11.4 -
250℃ Ω•cm 8.8 8.7 8.7 8.8 8.2 8.5 12.3 8.8 -
350℃ Ω•cm 6.9 7.0 7.0 7.0 6.4 6.8 10.2 7.0 -
Young's modulus GPa 68 68 - 57 57 - - - -
Poisson's ratio 0.21 0.21 - 0.22 0.22 - - - -
Glass type Na2O•BaO•SiO2 Na2O•Al2O3•B2O3•SiO2 Na2O•
BaO•
SiO2		 Na2O•
Al2O3•
B2O3•
SiO2
Application Fe,Fe-Ni,
Fe-Cr,Fe-Ni-Cr		 Fe Kovar Kovar Mo Fe Kovar
 

ST-4F/K,BH-FW/K:Composite glass
Please contact us about color variations.

 

1. Pressing

The mold pressure of 80-100kg/cm2 is suitable for making preforms. The preforms manufactured under this condition have enough green strength for handling and the organic binder decomposes easily during the pre-firing process.
 

2. Pre-firing

Pre-firing is carried out in an oxidizing atmosphere such as oxygen or air. Pre-firing temperature should be applied to the temperature T1 in the property table on grade sheet .
Decomposition and firing of the organic binder take place most actively at 150-530 ℃. so gradual heating is necessary in this temperature range.


 

3. Sealing

Sealing is carried out in a nitrogen atmosphere. Sealing temperature should be applied to the temperature T2 in the property table on grade sheet.

回上層