低溫封裝玻璃粉1

產品說明

Low Temperature Sealing Glass 1

Low temperature sealants is a composite material made by blending matrix powder glass with low softening temperature and specially synthesized ceramic filler powder.

By changing the blending ratio and the kind of glass and ceramics, it is possible to change its sealing temperature and thermal expansion coefficient.

When a devitrifiable glass is heated, crystals form in the resulting melt, which then solidifies to produce a highly heat-resistant seal.

 

Features

  • Composite sealing glasses have a short sealing time and excellent ability to seal glas and metal.
  • Devitrifiable glasses can be re-fired without deformation.

 

Properties

 Properties/Glass Code LS-3075 BF-0606 LS-3081 LS-0118 LS-0206 LS-7105
Sealing temperature ℃ 450 485 410 430 450 450
Thermal expansion coefficient ×10-7/K 36.5 73*1 74 72.5 72 85*1
Density ×103kg/m3 6.91 6.05 6.89 7.05 6.82 6.37
Transformation point ℃ 300 365 300 317 325 －
Deformation point ℃ 330 393 320 337 353 －
Softening point ℃ － 450 365 390 410 400
Volume resisivity Log ρ 150℃ Ω•cm 10.8 12.0 12.2 11.2 13.2 10.4
Color Black Green Black Black Black Black
Glass Type PbO•B2O3
(COM)* 2		 Bi2O3•B2O3
(COM)*2		 PbO•B2O3 (COM)*2 ZnO•PbO•B2O3
(DEV)*3
Application Alkali-free glass Window glass , 50 Alloy, 426 Alloy  
 
  1. This thermal expansion coefficient was measured at 30 to 300℃.
  2. COM:Composite sealing glass 　
  3. DEV:Devitrifiable sealing glass

 

Application Method

1. Printing and Drying

The paste for printing is prepared by adding a vehicle to the sealant and mixing them well. The vehicle is obtained by dissolving acrylic resin in terpineol at a concentration of 5%. The paste obtained is printed on the substrates with 80-100 mesh stainless screen. Drying is carried out at 120℃ for 10-20 minutes.
 

2. Pre-firing

In order to eliminate the resin in the film layers, pre-firing is done in an oxidizing atmosphere such as oxygen or air. Decomposition and firing of resin take place most actively at 320-380℃, so gradual heating is necessary in this temperature range.

Glass Code Ti(℃) T2(℃)
LS-3075 320 380
BF-0606 350 450
LS-3081 320 380
LS-0118 320 380
LS-0206 320 400
LS-7105 320 390
Fig. 1 Pre-firing profile
 

3. Sealing

Sealing is carried out in either an air or a nitrogen atmosphere.

Glass Code T(℃) t(min.)
LS-3075 450 10
BF-0606 485 10
LS-3081 410 10
LS-0118 430 10
LS-0206 450 15
LS-7105 450 20
Fig. 2 Sealing profile
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