Microcrystalline glass brazing filler metal, preparation method thereof and method for connecting ferrite

A technology of glass ceramics and connecting iron, applied in cleaning methods and utensils, chemical instruments and methods, cleaning methods using liquids, etc., can solve the problem of large differences in electromagnetic properties and corrosion resistance of ferrite metal-based solder brazing , Poor thermal stability and impermeability, affecting the performance and stability of microwave ferrite devices, etc., to achieve the effect of improving service life and full-cycle stability, good thermal stability and impermeability, and high joint strength

Inactive Publication Date: 2018-08-21
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention aims to solve the problems of large difference in electromagnetic properties and cracks in ferrite metal-based solder brazing, as well as the problems of poor corrosion resistance, thermal stability, and perme

Method used

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  • Microcrystalline glass brazing filler metal, preparation method thereof and method for connecting ferrite

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Experimental program
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Effect test

specific Embodiment approach 1

[0027] Specific embodiment one: in terms of mass percentage, the glass-ceramic solder of the present invention is

[0028] 20Y 2 o 3 -35Fe 2 o 3 -18BaO-25SiO 2 -2Cr 2 o 3 ; Above-mentioned glass-ceramic solder is carried out according to the following steps:

[0029] Step 1. Weigh the raw material Y according to the predetermined mass percentage 2 o 3 , Fe 2 o 3 , BaO, SiO 2 、Cr 2 o 3 After mixing, use wet grinding method to grind, and dry at 65°C for 10 hours;

[0030] Wherein, the ball milling speed n=300r / min described in step one, the ball milling time is 2h, all raw materials: grinding ball: dispersant=1:2:1, dispersant is dehydrated alcohol;

[0031] Step 2: Melting at 1200°C for 2 hours, pouring into water and quenching to form granules, grinding by wet grinding method, and drying at 65°C for 10 hours to obtain glass-ceramic solder;

[0032] Wherein, the rotational speed of the ball mill in step 2 is n=500r / min, the grinding time is 12h, the particle:grin...

specific Embodiment approach 2

[0040] Specific embodiment two: in terms of mass percentage, the glass-ceramic solder of the present invention is

[0041] 20Li 2 O-35Fe 2 o 3 -15BaO-25SiO 2 -5Cr 2 o 3 ; Above-mentioned glass-ceramic solder is carried out according to the following steps:

[0042] Step 1, take the raw material Li according to the established mass percentage 2 O, Fe 2 o 3 , BaO, SiO 2 、Cr 2 o 3 (analytical pure) and then mixed, ground by wet grinding method, and dried at 65°C for 10 hours;

[0043] Wherein, the ball milling speed n=300r / min described in step one, the ball milling time is 2h, all raw materials: grinding ball: dispersant=1:2:1, dispersant is dehydrated alcohol;

[0044] Step 2: Melting at 1200°C for 2 hours, pouring into water and quenching to form granules, grinding by wet grinding method, and drying at 65°C for 10 hours to obtain glass-ceramic solder;

[0045] Wherein, the rotational speed of the ball mill in step 2 is n=500r / min, the grinding time is 12h, the parti...

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Abstract

The invention discloses microcrystalline glass brazing filler metal, a preparation method thereof and a method for connecting ferrite and belongs to the technical field of ferrite brazing connection.The microcrystalline glass brazing filler metal, the preparation method thereof and the method for connecting the ferrite aim to solve the problem that due to long-time use, the performance stabilityof a microwave ferrite device is affected. The brazing filler metal (20-x) Li2O-xY2O3-35Fe2O3-(20-y)BaO-25SiO2-yCr2O3 is prepared by adopting a fusing-cold quenching method. The method for connectingthe ferrite includes the steps that yttrium ferrite is pretreated, the microcrystalline glass brazing filler metal is adjusted to be in a uniform paste shape with terpilenol, and then the portion between to-be-connected faces of the pretreated yttrium ferrite is uniformly coated with the microcrystalline glass brazing filler metal in a silk-screen printing method to form a to-be-welded part, and drying is performed; and then pressure is applied to the to-be-welded part, brazing treatment is performed, cooling with a furnace is performed, and then ferrite connection is completed. Strength of aconnection joint acquired through the microcrystalline glass brazing filler metal is high and is (90-100MPa), the thermal stability and the corrosion resistance of the joint are improved, and therefore the service life of the ferrite device is prolonged, and the using period stability of the ferrite device is improved.

Description

technical field [0001] The invention belongs to the technical field of ferrite brazing connection, relates to a ferrite glass-ceramic brazing connection technology, and specifically relates to a glass-ceramic solder, a preparation method thereof, and a method for connecting ferrite. Background technique [0002] As a microwave material, ferrite is widely used in national defense and satellite communications. Its narrow ferromagnetic resonance linewidth, low saturation magnetization and low dielectric loss make it widely used in circulators, isolators, modulation oscillators, oscillators, phase shifters, etc. [0003] Since the electromagnetic properties of the metal-based solder and the ferrite base material are greatly different, and the chemical compatibility is also very different, the formed joint will inevitably affect the dielectric properties and magnetic properties of the ferrite functional parts, so the metal-based solder Not suitable for ferrite connections. In a...

Claims

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Application Information

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IPC IPC(8): B23K35/36B23K35/40B02C25/00B02C23/06B08B3/12B08B3/08B02C17/10
CPCB02C17/10B02C23/06B02C25/00B08B3/08B08B3/12B23K35/3602B23K35/40
Inventor 林盼盼林铁松何鹏陈倩倩
Owner HARBIN INST OF TECH
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