Lead-free bismuthate system low-melting-point glass powder and preparation method thereof

A low-melting-point glass, lead-free bismuthate technology, applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., can solve the problems of unstable chemical properties, limited use, high cost of glass, and improve the chemical stability of glass. , Improve glass performance, good stability

Inactive Publication Date: 2018-07-20
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The high cost of vanadate system and tellurate system glass limits its application
The phosphate system is prone to hydrolysis and is chemically unstable

Method used

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  • Lead-free bismuthate system low-melting-point glass powder and preparation method thereof
  • Lead-free bismuthate system low-melting-point glass powder and preparation method thereof
  • Lead-free bismuthate system low-melting-point glass powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] (1) At room temperature, take by weighing 74.44 grams of bismuth oxide (30%), 39.72 grams of boric acid (introducing 60% boric oxide), 3.19 grams of silicon oxide (10%), 4.27 grams of sodium carbonate (introducing 2.50Wt% sodium oxide), 3.67 grams of potassium carbonate (introduced with 2.50 wt% potassium oxide), stirred and ground in a mortar for 5 minutes until uniform. (2) Pour the above mixture into a corundum crucible with a capacity of 200ml, and place the crucible in the high-temperature box-type furnace after the actual temperature in the chamber of the high-temperature box-type furnace rises to 1100°C and is stable. (3) After 60 minutes of heat preservation, quickly pour a small part of the clear and transparent glass liquid into a stainless steel container filled with deionized water; pour the other part of the clear and transparent glass liquid into a graphite mold that has been preheated at 480°C for 1 hour. And quickly moved to a muffle furnace with a tempe...

Embodiment 2

[0033] (1) At room temperature, take by weighing 91.19 grams of bismuth oxide (60%), 12.17 grams of boric acid (introducing 30% boric oxide), 1.96 grams of silicon oxide (10%), 4.27 grams of sodium carbonate (introducing 2.50Wt% sodium oxide), 3.67 grams of potassium carbonate (introduced with 2.50 wt% potassium oxide), stirred and ground in a mortar for 5 minutes until uniform. (2) Pour the above-mentioned mixture into a corundum crucible with a capacity of 200ml. After the actual temperature in the chamber of the high-temperature box-type furnace rises to 1100°C and is stable, place the crucible in the high-temperature box-type furnace. (3) After keeping warm for 50 minutes, quickly pour a small part of the clear and transparent glass liquid into a stainless steel container filled with deionized water; pour the other part of the clear and transparent glass liquid into a graphite mold that has been preheated at 450°C for 1 hour, And quickly moved to a muffle furnace with a te...

Embodiment 3

[0035] (1) At room temperature, take by weighing 82.70 grams of bismuth oxide (40%), 16.55 grams of boric acid (introducing 30% boron oxide), 7.99 grams of silicon oxide (30%), 1.71 grams of sodium carbonate (introducing 1.00Wt% sodium oxide), 1.47 grams of potassium carbonate (introduced with 1.00 wt% potassium oxide), and 3.00 grams of tellurium oxide were stirred and ground in a mortar for 5 minutes until uniform. (2) Pour the above-mentioned mixture into a corundum crucible with a capacity of 200ml. After the actual temperature in the chamber of the high-temperature box-type furnace rises to 1100°C and is stable, place the crucible in the high-temperature box-type furnace. (3) After 90 minutes of heat preservation, quickly pour a small part of the clear and transparent glass liquid into a stainless steel container filled with deionized water; pour the other part of the clear and transparent glass liquid into a graphite mold that has been preheated at 480°C for 1 hour , and...

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Abstract

The invention relates to lead-free bismuthate system low-melting-point glass powder and a preparation method thereof. The glass powder comprises components including a glass main body and an additive;the mass ratio of the glass main body to the additive is 100:(0-17). The preparation method comprises the steps of weighing each component, and conducting stirring and grinding to obtain a mixture; melting the mixture to obtain a glass liquid, and then performing quenching treatment to obtain glass particles; drying and grinding the glass particles to obtain the glass powder. The glass powder does not contain lead and has a low melting point, glass transition temperature of 330-430 DEG C and a wide sintering temperature range.

Description

technical field [0001] The invention belongs to the field of glass powder materials and preparation thereof, in particular to a lead-free bismuth salt system low-melting glass powder and a preparation method thereof. Background technique [0002] Electronic paste is mainly composed of conductive phase, binder phase and organic phase. The bonding phase in electronic paste is mainly introduced by glass powder. The binder phase ensures good contact between the slurry and the substrate and provides certain adhesion. [0003] In order to meet the requirements of low-temperature use, it is necessary to reduce the melting temperature of the glass powder. The lead-containing glass has certain advantages in thermal and mechanical properties, but the lead element is harmful to the human body. Therefore, the research and production of lead-free low-melting glass powder has become a mainstream and has broad application prospects. Lead-free systems mainly include bismuthate system, va...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C12/00C03C3/064C03B19/02
CPCC03B19/02C03C3/064C03C12/00
Inventor 李耀刚王启辉戚佳斌王宏志张青红侯成义
Owner DONGHUA UNIV
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