Vanadates leadless low-temperature sealing glass material and method for preparing same

Abstract

The invention relates to a vanadate-system lead-free low temperature sealing glass material and a preparation method thereof. The components of the sealing glass material by mol percentage are as follows: 25 percent to 55 percent of V2O5, 5 percent to 20 percent of B2O3, 5 percent to15 percent of ZnO, 20 percent to 50 percent of TeO2 and 2 percent to 15 percent of an alkali metal oxide R2O. The preparation method of the invention comprises the steps that vanadium pentoxide, boric acid, zinc oxide, tellurium dioxide and alkali metal carbonate are adopted as raw materials; the weight percentages of the raw materials are calculated according to the mol percentage of each component of the sealing glass; the raw materials are then weighted and evenly mixed to be placed in a corundum crucible and fused under the temperature of 800 to 900 DEG C; molten glass is then cast for formation or ground into powder after being treated with water quenching and the powder is then filtered by a 200-mesh sieve. The sealing glass material of the invention contains no toxic and harmful substances such as lead, cadmium, thallium, and the like, and has the advantages of low temperature for sealing, the minimum temperature reaching 300 DEG C, and good chemical stability, and is especially applicable to the sealing of electronic components.

Description

technical field [0001] The invention relates to a vanadate-based lead-free low-temperature sealing glass material and a preparation method thereof, belonging to the technical field of electronic materials. Background technique [0002] Low-temperature sealing glass refers to the sealing glass whose melting point is significantly lower than that of ordinary glass. It can be used as a solder in vacuum technology and electronic technology. The application of inorganic glass in the shellless sealing of semiconductor instruments is more environmentally friendly than the application of organic dielectrics. , aging, moisture-proof, robustness and other aspects have more obvious advantages. [0003] At present, PbO-B is mainly used in the field of low-temperature sealing glass in China. 2 o 3 -SiO 2 , PbO-ZnO-B 2 o 3 and other systems. Leaded glass has a series of well-known advantages, such as low dielectric loss, low softening temperature, and good chemical stability. Howev...

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Problems solved by technology

[0016] All of the above patents have a common shortcoming that contains a large amount of PbO and Tl 2 O and other toxic substances, therefore, it is imminent to develop ultra-low temperature environment-friendly (does not contain toxic and harmful substances such as lead, cadmium and thallium) sealing glass materials with a sealing temperature of about 300 °C

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