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Lead-free low-melting sealing glass and preparation method thereof

A glass and fusion sealing technology, which is applied in the field of lead-free sealing glass, can solve the problems of easy oxidation and high cost, and achieve the effects of high qualified rate of finished products, scientific and reasonable components and ratio, and strong operability

Inactive Publication Date: 2009-12-09
苏州恒仓红外光学材料研发中心有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Purpose of the invention: the purpose of the present invention is to overcome the defects of toxic elements such as lead in the sealing glass in the prior art, and the easily oxidized and high-cost SnO components in the phosphate sealing glass, and provide a lead-free low-melt sealing Bonded glass and preparation method thereof

Method used

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  • Lead-free low-melting sealing glass and preparation method thereof
  • Lead-free low-melting sealing glass and preparation method thereof
  • Lead-free low-melting sealing glass and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Calculate and select each raw material according to the example 1 design scheme in table 1, wherein P 2 o 5 Introduced as ammonium phosphate, other raw materials are the corresponding carbonates, oxides and fluorides. The raw materials are weighed and mixed evenly, and dried and heat-treated at 260°C, then ground and crushed, then placed in a quartz crucible, and then placed in a silicon carbide rod electric furnace, heated and melted at 1200°C Take out the molten glass after one hour, pour it on a cold iron plate immediately, then crush the cooled glass pieces, grind them, and pass through a 200-mesh sieve to obtain a glass powder.

[0024] The prepared glass powder was measured according to the Chinese electronics industry standard SJ / T 10893-6 for relevant property parameters, including softening temperature and thermal expansion coefficient of the finished product, and the corresponding measurement results are shown in Table 1.

[0025] Table 1: Glasses with diffe...

Embodiment 2

[0028] Calculate and select each raw material according to the example 2 design scheme in table 1, wherein P 2 o 5 Introduced as ammonium phosphate, other raw materials are the corresponding carbonates or oxides. The raw materials are weighed and mixed evenly, and dried and heat-treated at 250°C, then ground and crushed, then placed in a quartz crucible, and then placed in a silicon carbide rod electric furnace, heated and melted at 1050°C for 3 Take out the molten glass after one hour, pour it on a cold iron plate immediately, then crush the cooled glass pieces, grind them, and pass through a 200-mesh sieve to obtain a glass powder.

[0029] The prepared glass powder was measured according to the Chinese electronics industry standard SJ / T 10893-6 for relevant property parameters, including softening temperature and thermal expansion coefficient of the finished product, and the corresponding measurement results are shown in Table 1.

Embodiment 3

[0031] Carry out calculation and select each raw material by the design scheme of example 3 in table 1, wherein P 2 o 5 Introduced as ammonium phosphate, other raw materials are the corresponding carbonates or oxides. The raw materials are weighed and mixed evenly, and dried and heat-treated at 250°C, then ground and crushed, then placed in a quartz crucible, and then placed in a silicon carbide rod electric furnace, heated and melted at 1100°C for 3 Take out the molten glass after one hour, pour it on a cold iron plate immediately, then crush the cooled glass pieces, grind them, and pass through a 200-mesh sieve to obtain a glass powder.

[0032] The prepared glass powder was measured according to the Chinese electronics industry standard SJ / T 10893-6 for relevant property parameters, including softening temperature and thermal expansion coefficient of the finished product, and the corresponding measurement results are shown in Table 1.

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Abstract

The invention discloses lead-free low-melting sealing glass and a preparation method thereof. The glass comprises the following raw materials in percentage by mol: 20 to 55 percent of P2O5, 5 to 30 percent of TeO2, 0 to 55 percent of ZnO and additives with the content not more than 30 percent of that of total compositions of the glass. The lead-free low-melting sealing glass has the advantages that the compositions and composition proportioning of the glass are scientific and reasonable, and the compositions do not contain lead which pollutes the environment or poisons human body; meanwhile, the glass is environment-friendly and low toxic and has wide softening temperature and thermal expansion coefficient ranges; therefore, the glass can be used in low-temperature packaging among different electronic components. Moreover, the simple and reasonable preparation method has strong operability and high qualified rate of finished products and is suitable for continuous large-scale industrialized production.

Description

Technical field: [0001] The invention relates to a lead-free sealing glass, in particular to a lead-free glass with a low melting point that can be used for sealing electronic components and a preparation method of the glass. Background technique: [0002] In the electronics industry, glass sealing is often used to seal the connection between glass components, glass parts and metal, alloy or ceramics. The temperature of this sealing should be as low as possible to ensure the protection of electrical devices or electronics. The utensils are not damaged. Among the low-temperature sealing glasses currently used, the glass containing lead oxide and zinc oxide is the main one. These glasses have high resistance, low dielectric loss, low softening temperature and good chemical stability. and other advantages, can better meet a variety of sealing requirements, but because the components contain lead elements, which have greater toxicity and people's awareness of environmental prote...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C8/24
Inventor 李家成唐彬薛天峰
Owner 苏州恒仓红外光学材料研发中心有限责任公司
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