Lead-free low-temperature glass for manufacturing diode glass shell

A low-temperature glass and diode technology, applied in the field of lead-free low-temperature glass, can solve the problems of cracking and acid corrosion resistance that cannot meet the requirements for use, and achieve the effect of improving acid corrosion resistance and maintaining appearance.

Inactive Publication Date: 2012-08-15
金招娣
8 Cites 3 Cited by

AI-Extracted Technical Summary

Problems solved by technology

However, the acid corrosion resistance of the glass still cannot meet the actual use requirements, and even the "cra...
View more

Abstract

The invention discloses lead-free low-temperature glass for manufacturing a diode glass shell. The glass mainly contains the following components in percentage by mass: 40 to 60 percent of SiO2, 10 to 25 percent of B2O3, 1 to 10 percent of P2O5, 10 to 25 percent of Li2O, Na2O and K2O, 1 to 10 percent of MgO, CaO, SrO and BaO, 0.5 to 10 percent of Al2O3, 0.5 to 5 percent of TiO2, 1 to 10 percent of ZnO, 0 to 5 percent of F2, and 0 to 2 percent of clarifying agent, wherein the clarifying agent can be one or more of Sb2O3, CeO2 and/or As2O3. The lead-free low-temperature glass has very excellent acid corrosion resistance, and meets the requirement of a diode planting process for acid resistance of the glass shell. In addition, the expansion coefficient of the lead-free glass is matched with that of a Dumet wire, the softening temperature does not exceed 630 DEG C, and the glass can be stably sealed with the Dumet wire at the temperature of below 700 DEG C.

Technology Topic

Acid resistanceMetallurgy +3

Image

  • Lead-free low-temperature glass for manufacturing diode glass shell
  • Lead-free low-temperature glass for manufacturing diode glass shell

Examples

  • Experimental program(1)

Example Embodiment

[0022] The technical solutions of the present invention will be specifically described by the following examples, and the content of the present invention is not limited by the following examples.
[0023] In the present invention, the glass samples are melted by means of a high-temperature electric furnace in the laboratory, and the raw materials used are high-purity ore raw materials or chemically pure reagents, such as the introduction of SiO 2 of high-purity quartz sand, the introduction of B 2 O 3 boric acid, introducing P 2 O 5 of ammonium dihydrogen phosphate, the introduction of carbonates of alkali metal oxides and alkaline earth metal oxides, the introduction of Al 2 O 3 of aluminum hydroxide, introducing TiO 2 Titanium oxide, zinc oxide introduced with ZnO, etc., with the help of a small amount of Sb 2 O 3 The combined action of nitrate and nitrate to achieve clarification of glass liquid. The batches of each component are put into a platinum crucible and melted into a glass sample in a high-temperature electric furnace. Pour the melted uniform glass liquid onto the preheated stainless steel mold to form block glass, then anneal at a temperature about 10°C higher than its transition temperature for 2 hours, and then close the muffle furnace to cool with the furnace.
[0024] After the annealed glass is heated and melted on a gas lamp, glass filaments with a diameter of 0.55 to 0.75 mm and a length of 235 mm are drawn, and the softening temperature of the glass sample is measured according to the ASTM C338 standard; the drawn size is approximately The cylindrical glass rod of the -7 /K, 30~300℃); the drawn size is approximately The cylindrical glass rods are used to measure the acid corrosion resistance of glass.
[0025] Considering that the temperature of the electroplating solution during diode electroplating is room temperature, and the electroplating time does not exceed 1 hour, in the present invention, in order to ensure that the invented glass composition can well withstand the erosion of the electroplating solution during the electroplating process, the acid corrosion resistance of the glass is adopted. The evaluation standard is: take 200ml of electroplating solution in a beaker, put The glass rod was immersed in the plating solution, after which the beaker was sealed and placed in an oven at 50 °C for 1 hour. After that, the glass rod was washed and dried, and the morphology of the glass rod after being eroded by the electroplating solution was observed under an electron microscope with a magnification of 100 times. "√" indicates that the surface of the glass rod has maintained the original appearance after erosion, and there is no obvious crack; "×" indicates that there is obvious crack on the surface of the glass rod after erosion.
[0026] In Table 1, the numbered "Examples 1-3" are three examples of the present invention, and the numbered "Comparative Example" is the lead-free low-temperature glass described in Chinese Patent CN 1850681A (publication number). The content of the ingredients is expressed in weight percent.
[0027] In order to illustrate the advantages of the lead-free low-temperature glass of the present invention, three important parameters of the three example glasses and the comparative example glasses are given in Table 2:
[0028] 1 - Softening temperature, corresponding to the temperature at which the glass filament is elongated at a rate of 1 mm/mm under a softening point tester.
[0029] 2-Expansion coefficient, the average linear expansion coefficient of the glass rod in the range of 30~300℃.
[0030] 3- The acid corrosion resistance, the change of the surface morphology of the glass rod after immersion in the electroplating solution.
[0031] Table 1
[0032]
[0033] Table 2
[0034]

PUM

no PUM

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.

Similar technology patents

Rear Access Pants

InactiveUS20140304894A1eliminate needmaintain appearance
Owner:BISHOP MARILYN YVETTE +1

Hot-filled matcha milk tea drink containing Chlorella pyrenoidosa and bottled with PET bottle

InactiveCN106376643Amaintain appearanceAdd healthy elements
Owner:HANGZHOU WAHAHA TECH

Classification and recommendation of technical efficacy words

  • maintain appearance

Hot-filled matcha milk tea drink containing Chlorella pyrenoidosa and bottled with PET bottle

InactiveCN106376643Amaintain appearanceAdd healthy elements
Owner:HANGZHOU WAHAHA TECH

Rear Access Pants

InactiveUS20140304894A1eliminate needmaintain appearance
Owner:BISHOP MARILYN YVETTE +1
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products