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Leadless tellurate low melting sealing glass

A technology of lead-free tellurite and low-melting glass, which is applied in the field of lead-free tellurate low-melting glass, can solve the problems that the application of low-melting sealing glass has not been reported, and achieve good hardness and chemical stability, and sintering temperature Low, good sealing strength effect

Inactive Publication Date: 2008-04-23
BEIJING INSTITUTE OF GRAPHIC COMMUNICATION
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These patents all are to prepare tellurite glass or tellurite glass containing halogen or heavy metal as optical material, but the application in low-melt sealing glass has not been reported, and it is different from other combinations in the glass composition proposed by the present invention. different

Method used

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  • Leadless tellurate low melting sealing glass

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The various raw materials in the glass composition use the corresponding industrial grade oxide or carbonate powder, and the glass composition is: TeO 2 85%, V 2 o 5 5%, Bi 2 o 3 3%, Sb 2 o 3 2%, Na 2 O 5%. Commercially available industrial-grade tellurium oxide, vanadium pentoxide, bismuth oxide, antimony oxide and sodium carbonate are ground, accurately measured according to the formula, and mixed evenly. Melt in an alumina crucible at 750°C for 30 minutes, and then pour and press the molten glass into thin sheets. After the glass flakes are ground, pass through a 200-mesh sieve for later use.

[0030] The glass transition temperature of the glass obtained by differential thermal analysis was 270°C.

[0031] Low-melting glass and ZrSiO 4Mixing evenly according to the mass ratio of 65:35 is the prepared sealing glass powder. The sealing glass has good fluidity when kept at 350°C, and the average thermal expansion coefficient of the sintered body from roo...

Embodiment 2

[0033] The various raw materials in the glass composition use the corresponding industrial grade oxide or carbonate powder, and the glass composition is: TeO 2 55%, V 2 o 5 30%, Bi 2 o 3 3%, B 2 o 3 1%, ZnO 2%, SnO 2 3%, Ag 2 O 2%, CaO 2%, BaO 2%. Grind commercially available industrial grade tellurium oxide, vanadium pentoxide, bismuth oxide, boric anhydride, zinc oxide, stannous oxide, silver oxide, calcium carbonate and barium carbonate, accurately measure according to the formula, and mix evenly. Melt in an alumina crucible at 850°C for 40 minutes, and then pour and press the molten glass into thin sheets. After the glass flakes are ground, pass through a 300-mesh sieve for later use.

[0034] The glass transition temperature of the glass obtained by differential thermal analysis was 323°C.

[0035] Low-melting glass and ZnSiO 4 Mixing evenly according to the mass ratio of 70:30 is the prepared sealing glass powder. The sealing glass has good fluidity when...

Embodiment 3

[0037] The various raw materials in the glass composition use the corresponding industrial grade oxide or carbonate powder, and the glass composition is: TeO 2 25%, V 2 o 5 25%, Bi 2 o 3 15%, Al 2 o 3 2%, SiO 2 2%, SnO 2 5%, BaO 5%, ZnO 8%, Sb 2 o 3 4%, MgO 2%, CaO 2%, Na 2 O 2%, K 2 O 3%. Commercially available industrial grade tellurium oxide, vanadium pentoxide, bismuth oxide, aluminum oxide, silicon oxide, zinc oxide, stannous oxide, antimony oxide, magnesium carbonate, barium carbonate, calcium carbonate, sodium carbonate, potassium carbonate , after accurate measurement according to the formula, mix well. Melt in a quartz crucible at 950°C for 50 minutes, and then pour the molten glass into clean water. After drying in an oven at 130°C, the glass particles were ground and passed through a 250-mesh sieve for use.

[0038] The glass transition temperature of the glass obtained by differential thermal analysis was 341°C.

[0039] Mix low-melting glass ...

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Abstract

The leadless tellurate low melting glass is used for seal-glass and functional paste-composition binder for sintering. It is characterized by that components (mass percentages): TeO2 10-90%, V205 2-40%, SiO2 0-5%, B203 0-5%, ZnO 0-10%, Bi203 0-20%, Sb203 0-8%, Al203 0-4%, SnO2 0-6%, Ag20 0-10%, BaO 0-5%, MgO+CaO+SrO 0-5% Na20+Li20+K20 0-5%. The infrared absorption spectrum has strong absorption band at 950 to 1050cm-1, and two transmission peaks at 500 to 520cm-1 and 1250 to 1350cm-1 respectively, its sealing temperation is between 350 and 580deg.C.

Description

technical field [0001] The invention relates to a lead-free tellurate low-melting glass used as sealing glass. Sealing glass is mainly used for sealing between glass and glass, glass and ceramics and glass and metal. Its application process is usually to add fillers to adjust the thermal expansion coefficient in low-melting glass to form a composite sealing glass powder, add an organic carrier to prepare a paste composition, and use printing, coating and other processes to form on the sealed parts. The desired shape is then sintered at high temperature to achieve the purpose of sealing. Sealing glass is mainly used to make various vacuum devices. The low-melting glass prepared by the present invention and functional powder such as conductive powder, pressure-sensitive ceramic powder, gas-sensitive ceramic powder, high-efficiency heat-conducting powder, etc. can also be formulated into composite powder, which can be used on metal, glass or Fabricate functional coatings or fu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C8/24
CPCC03C3/122C03C3/14C03C3/145C03C8/02C03C8/04C03C8/14C03C8/24
Inventor 罗世永
Owner BEIJING INSTITUTE OF GRAPHIC COMMUNICATION
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