CN1028632C - Hot-pressing process for glass-metal sealing - Google Patents
Hot-pressing process for glass-metal sealing Download PDFInfo
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- CN1028632C CN1028632C CN 93101627 CN93101627A CN1028632C CN 1028632 C CN1028632 C CN 1028632C CN 93101627 CN93101627 CN 93101627 CN 93101627 A CN93101627 A CN 93101627A CN 1028632 C CN1028632 C CN 1028632C
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- glass
- metal
- sealing
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- weld
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Abstract
The present invention belongs to a hot-pressing seal process using solid weld in the technical field of the seal of glass and metal. Glass and metal are sealed into a whole so that the vacuum air-tight requirement is achieved. The present invention is characterized in that weld is carried out under the conditions of heating and hot press; welding temperature is 0.7 to 0.9 time of a melting point of a welding material, welding pressure is 50kg to 140 kg/cm<2>; welding time is 0.5 to 2 min. Weld uses a metal material PB with good plasticity. Hot-pressing seal has the advantage that the weld is carried out in atmosphere, and the sealing stress caused by different expansion coefficients between the metal and the glass can be solved without annealing after weld. The leakage rate of the sealing face of the glass and the metal which are sealed by the hot press seal method is smaller than 10<-11>Torr. L/sec.
Description
The invention belongs to the Technique of glass-to-metal seals field.Utilize the hot pressing encapsulation technique of solid sealing method to carry out the hermetic seal of the glass and the metal of vacuum heat collection pipe.
Flame sealing method is generally adopted in traditional glass-to-metal seal, will be enclosed in together by the glass of sealing-in and Metal Melting, and this method requires to be mated very much by the coefficient of expansion between the glass-metal of sealing-in (difference is less than 6% mutually).Glass tubing behind the sealing by fusing needs careful annealing, to eliminate the thermal stresses that sealing by fusing causes.So not only make complex technical process, and the consumption of the energy is also very big, production efficiency also is restricted.Because this Technology maturation, the quality of sealing-in is very reliable, so although the more complicated of technology own, the company of producer (English, lotus, day etc.) of most countries generally all adopts this kind method for sealing at present.With regard to China's present circumstances, the glass-tube material that existing glass-tube manufacturer can provide is failed to find and can be satisfied the metallic substance that is complementary with its sealing by fusing, also the transition sealing measure be need adopt if continue to use sealing by fusing technology, so just bigger difficulty and trouble brought to sealing-in.
The objective of the invention is to utilize the hot pressing encapsulation technique, under lower temperature, to carrying out solid-state sealing-in by a kind of lead-based solder between the glass end face of flange of valve tube and the metal end, promptly remain under the solid-state situation by suitably pressurization at welding material, it is sealed.Technology is simplified greatly, also solved simultaneously because the glass-tube material that China produces has the difficulty that does not match and caused between the coefficient of expansion and the sealing-in metal.
Hot-press sealing is a kind of special welding process that belongs in the material solid-state welding technology.Normally to closure heating and pressurization, make it produce the viscous deformation of trace in the junction, and then interatomic phase mutual diffusion takes place realize sealing-in.Temperature and pressure is the basic parameter of decision hot-press sealing.For fear of the oxidation sealing-in of welding material in heat-processed normally under the gas shield condition or carry out in the vacuum oven.
The present invention has carried out great improvement to the pressuring method of sealing-in process, has doubly just begun to apply 40-150kg/cm to it rapidly by cylinder when softening when pure lead solder temperature reaches welding fusing point 0.7-0.9
2Surge pressure, make scolder be out of shape decomposition rapidly, when its future and oxidation still, just formed the gastight sealing surface, for reaching this purpose, can be controlled in during pressurization between 50 μ s～2min.
In order to make Glass tubing in the sealing-in process, can tolerate 150kg/cm
2Pressure, glass-tube must be made 35 °～65 ° form of flanges by the end face of sealing-in.The shaping of flange garden system in glass work lathe forms, and in order to form good hermetic seal flange, end face should keep flat attitude smooth.In order to make a flange holding capacity itself reasonable, the shape of flange is can be less than 10 by its leak rate of glass-to-metal seal face of sealing-in in this way
-11Torr.L/sec, welding is to carry out under the condition of heating and pressurizing, thereby welding temperature only is 0.7-0.9 times of the scolder fusing point, this temperature is lower than the strain temperature of glass, directly in atmosphere, carry out during welding, need not anneal after the welding, solve the stress of sealing that causes because of the coefficient of expansion is different between metal and the glass.
Below in conjunction with accompanying drawing glass-to-metal seal technology of the present invention is described in detail.
Accompanying drawing: vacuum tube glass-metal fever press seal structural representation
Wherein: 1.Fe-Ni expansion alloy end cap
2. φ 1.5 lead-based solder
3. glass-tube flange
BTZ-2 type heat pipe-type flange vacuum tube collector.
One end of φ 100 glass-tubes is fired flange at 45, end face of flange and metal end surface are cleaned respectively and are deoiled, the centre inserts and puts φ 1.5 ring-type lead solders, when partly being heated to 300 ℃, sealing-in applies the surge pressure of 1800kg to end face, attack time is 50 μ s, and the sealing surface that obtains can reach Q 〉=1 * 10
-11The resistance to air loss of mbarl/s.
Claims (1)
1, a kind of hot-pressing process for glass-metal sealing is characterized in that:
(1) adopt lead solder, sealing temperature is 0.70～0.90 times of lead welding fusing point.
(2) scolder is impacted pressurization during sealing-in, pressure is 40～150kg/cm
2, the time is 50 μ s-2min.
(3) pressurization adopts flange directly to support force way, and the shape of flange adopts 30 °～65 ° flanges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93101627 CN1028632C (en) | 1993-02-18 | 1993-02-18 | Hot-pressing process for glass-metal sealing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 93101627 CN1028632C (en) | 1993-02-18 | 1993-02-18 | Hot-pressing process for glass-metal sealing |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1076180A CN1076180A (en) | 1993-09-15 |
| CN1028632C true CN1028632C (en) | 1995-05-31 |
Family
ID=4983690
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 93101627 Expired - Fee Related CN1028632C (en) | 1993-02-18 | 1993-02-18 | Hot-pressing process for glass-metal sealing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1028632C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1061014C (en) * | 1997-07-09 | 2001-01-24 | 东莞辉扬灯饰艺品有限公司 | Metal and glass combined products and its making technology |
| CN1077554C (en) * | 1998-12-17 | 2002-01-09 | 张入通 | Glass-metal aluminum wire hot press sealing process |
| CN102052788B (en) * | 2009-11-11 | 2016-08-17 | 施国樑 | Vacuum circulating heat-collecting element |
| CN102052789B (en) * | 2009-11-11 | 2016-09-28 | 施中天 | Overheating protective vacuum circulation heat collection element |
| CN102052777B (en) * | 2009-11-11 | 2014-08-06 | 海宁伊满阁太阳能科技有限公司 | Solar heat-collecting device with overheating protection vacuum circulating heat-collecting elements |
| CN102180602B (en) * | 2011-03-17 | 2013-06-19 | 日出东方太阳能股份有限公司 | Glass metal sealing process for solar vacuum heat-collecting tube |
| CN106757275B (en) * | 2016-12-07 | 2018-11-02 | 四川华丰企业集团有限公司 | Low temperature glass process for sealing after a kind of titanium alloy electrochemical oxidation |
-
1993
- 1993-02-18 CN CN 93101627 patent/CN1028632C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1076180A (en) | 1993-09-15 |
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| Date | Code | Title | Description |
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| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB02 | Change of applicant information |
Applicant after: Beijing Sunda Solar Energy Technology Co., Ltd. Applicant before: Beijing Solar Energy Research Inst. |
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| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: SOLAR ENERGY INST., BEIJING TO: BEIJING SANGDA SOLAR ENERGY TECHNOLOGY CO. LTD. |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |