Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

A soft lead-free low-temperature sealing glass and its preparation method

A sealing glass and low-temperature technology, which is applied in the field of lead-free soft low-temperature sealing glass and its preparation, can solve the problems of high cost and achieve the effects of low production cost, inhibition of glass crystallization, and simple operation

Active Publication Date: 2021-09-21
FUZHOU RUIKE BULANG MEDICAL TECH CO LTD
View PDF14 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the high cost of tin oxide and bismuth oxide, phosphate-based low-temperature sealing glass has more application prospects

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A soft lead-free low-temperature sealing glass and its preparation method
  • A soft lead-free low-temperature sealing glass and its preparation method
  • A soft lead-free low-temperature sealing glass and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] The preparation method of the soft lead-free low-temperature sealing glass specifically includes the following operations:

[0027] 1) Ingredients and mixing; Weigh each component raw material according to the ratio, put it into a ball mill tank and mix it evenly;

[0028] 2) Melting: Melt the prepared material at 800-1100°C and keep it warm for 0.5-3 hours; quench the melted glass to obtain glass frit;

[0029] 3) Grinding and granulation: crushing, grinding, and sieving glass frit to obtain glass powder; mixing glass powder with binder, dispersant and solvent to form a slurry, drying and granulating to obtain a particle size of 100-200 mesh Granulated glass powder;

[0030] 4) Pressing and sintering; use a tablet press to press the granulated powder into the desired shape, and heat up at a rate of 1-5°C / min, keep warm at 300-400°C for 2-5 hours to remove the glue, and then use a 5- Raise the temperature at a rate of 10°C / min to 370-450°C for 0.5-2 hours for sinterin...

Embodiment 1

[0038] Weigh a certain amount of raw materials according to the ratio in Table 1. According to the preparation method of the present invention, it is melted at 1100° C. for 1 hour and then quenched to obtain a glass block, which is pulverized, ground and granulated. The molded pressed parts are heated to 350°C at a rate of 1°C / min and held for 4 hours to remove the glue, and then heated to 430°C at a rate of 5°C / min for 1 hour and sintered to obtain a spare preform such as figure 1 shown. Place the prefab in such as figure 2 In the aluminum alloy sealing device perforated in the middle, the prefabricated part is a hollow cylindrical glass bead, and the Kovar alloy needle is put into the glass bead, and the temperature is raised in an electric furnace at a rate of 10°C / min, and the temperature is kept at 520°C for 0.5 hours. Cool down to room temperature at a rate of 2°C / min to complete the sealing. figure 2 The sealing part on the left is the sample diagram of Example 1 a...

Embodiment 2

[0040]Weigh a certain amount of raw materials according to the ratio in Table 1. According to the preparation method of the present invention, it is melted at 1000° C. for 1 hour and then quenched to obtain a glass block, which is pulverized, ground and granulated. The molded pressed parts were heated at a rate of 1 °C / min to 350 °C for 4 hours for debinding, and then heated at a rate of 5 °C / min to 370 °C for 1 hour for sintering. Place the prefab in such as figure 2 In the aluminum alloy sealing device perforated in the middle, the prefabricated part is a hollow cylindrical glass bead, and the Kovar alloy needle is put into the glass bead, and the temperature is raised in an electric furnace at a rate of 10°C / min, and the temperature is kept at 480°C for 0.5 hours , cooling down to room temperature at a rate of 2°C / min to complete the sealing. Table 2 tests the air tightness, water resistance and thermal expansion coefficient of each embodiment. The air tightness of embod...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
softening pointaaaaaaaaaa
sealing temperatureaaaaaaaaaa
particle size (mesh)aaaaaaaaaa
Login to View More

Abstract

The invention discloses a soft lead-free low-temperature sealing glass and a preparation method thereof. Its components are calculated in weight percentage as follows: phosphorus pentoxide 40-65%, silicon dioxide 0.1-5%, zinc oxide 20-40% %, sodium oxide 3-13%, potassium oxide 3-13%, aluminum oxide 1-15%, ceria 1-5%, colorant 0-3% (such as chromium oxide, iron oxide, etc.), the above components The sum of the weight percentages is 100%. Among them, the mass ratio of sodium oxide and potassium oxide is 1:1. The low temperature sealing glass prepared by the present invention has a thermal expansion coefficient between 12-16×10 ‑6 / ℃ soft glass, the sealing temperature is only 450-550℃, suitable for aluminum alloy sealing with extremely low working temperature. Because of its softness and high wettability, the thermal expansion coefficient is between Kovar alloy and aluminum alloy, which can well match the sealing between Kovar alloy and aluminum alloy.

Description

technical field [0001] The invention belongs to the technical field of low-temperature sealing glass, and in particular relates to a lead-free soft low-temperature sealing glass and a preparation method thereof. Background technique [0002] For nearly fifty years, aluminum has become one of the most widely used metals in the world. In the construction industry, aluminum is widely used in metal doors, windows, stair handrails, etc. after being processed into aluminum alloy; aluminum alloy materials are also widely used in the aviation department, national defense and military industry; aluminum cables reinforced with high-strength steel wires are commonly used in power transmission ; In addition, aluminum alloys are also widely used in automobile manufacturing, daily necessities, mechanical equipment and other fields. Especially in chips, sensors and military industries, the airtightness and heat dissipation after sealing are extremely high, and it is hoped that the weight ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C03C8/24
CPCC03C8/24
Inventor 刘鸿琳林燕喃傅宇宏
Owner FUZHOU RUIKE BULANG MEDICAL TECH CO LTD
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com