CN106865978A - A kind of middle Pyrex and its application - Google Patents
A kind of middle Pyrex and its application Download PDFInfo
- Publication number
- CN106865978A CN106865978A CN201710195155.9A CN201710195155A CN106865978A CN 106865978 A CN106865978 A CN 106865978A CN 201710195155 A CN201710195155 A CN 201710195155A CN 106865978 A CN106865978 A CN 106865978A
- Authority
- CN
- China
- Prior art keywords
- pyrex
- kovar alloy
- glass
- sealing
- middle pyrex
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C3/00—Glass compositions
- C03C3/04—Glass compositions containing silica
- C03C3/076—Glass compositions containing silica with 40% to 90% silica, by weight
- C03C3/089—Glass compositions containing silica with 40% to 90% silica, by weight containing boron
- C03C3/091—Glass compositions containing silica with 40% to 90% silica, by weight containing boron containing aluminium
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C27/00—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing
- C03C27/02—Joining pieces of glass to pieces of other inorganic material; Joining glass to glass other than by fusing by fusing glass directly to metal
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C4/00—Compositions for glass with special properties
- C03C4/0092—Compositions for glass with special properties for glass with improved high visible transmittance, e.g. extra-clear glass
Abstract
The invention discloses a kind of middle Pyrex and its application.Middle Pyrex of the invention by following weight than component constitute：SiO272~75%；B2O312.8~13.7%；Al2O35.1~7.5%；CaO 0.1~1.4%；Na2O 0.5~4.5%；K2O 1.1~3%.The average coefficient of linear expansion of middle Pyrex of the invention is (5.0 ± 0.1) × 10‑6K‑1, with kovar alloy（Kovar 4J29）Thermal coefficient of expansion match, so after by Pyrex sealing in kovar alloy and this, due to the coefficient of expansion that matches, its swell increment is identical when in use, thus kovar alloy with this in Pyrex can reliable sealing-in, so as to ensure the vacuum leakproofness of thermal-collecting tube.
Description
Technical field
The present invention relates to field of solar evacuated collector tube, more particularly to a kind of middle Pyrex and its application.
Background technology
From high temperature solar vacuum heat-collecting pipe structure, the vacuum sealing between outer layer glass tube and interior metal pipe is
Realized by the seal of glass and kovar alloy.Usually, the temperature in use of interior metal pipe is 300 ~ 550 DEG C, and
The temperature in use of outer layer glass tube is general not over 150 DEG C.It is swollen except being carried out using bellows to adapt to the influence that the temperature difference is caused
Bulk compensation is outer, also needs to ensure reliable sealing-in using the glass tube with kovar alloy same coefficient of thermal expansion（Explain：Two kinds of heat are swollen
The different material of swollen coefficient is sealed and is heated, and raises mutually synthermal two kinds of material heat expansion amounts difference, i.e., be connected to originally
Two kinds of materials together, a kind of expansion it is big, another kind expansion it is small, at sealing-in just be easy to leak）, so as to ensure collection
The vacuum leakproofness of heat pipe.
The content of the invention
It is an object of the invention to provide a kind of and kovar alloy matched expansion coefficient middle Pyrex.
Method for sealing another object of the present invention is to provide upper middle Pyrex and kovar alloy.
Above-mentioned purpose of the invention is achieved through the following technical solutions：
A kind of middle Pyrex, by following weight than component constitute：SiO272~75%；B2O312.8~13.7%；Al2O3
5.1~7.5%；CaO 0.1~1.4%；Na2O 0.5~4.5%；K2O 1.1~3%。
A kind of middle Pyrex, the component of optimum weight ratio is configured to：SiO272%；B2O312.8%；Al2O37%；CaO
1.4%；Na2O 4.5%；K2O 2.3%。
The application of middle Pyrex, kovar alloy and the middle Pyrex that will be processed by annealing in hydrogen atmosphere are while heated to 500 DEG C
More than, kovar alloy is injected into glass end face about 5mm when glass is in molten state, now glass and kovar alloy complete double edge
Sealing-in.
Beneficial effects of the present invention：
The average coefficient of linear expansion of middle Pyrex of the invention is (5.0 ± 0.1) × 10-6K-1, with kovar alloy（Kovar
4J29）Thermal coefficient of expansion match, so by kovar alloy and this in Pyrex sealing after, due to the expansion for matching
Its swell increment is identical when in use for coefficient, so kovar alloy and the reliable sealing-in of Pyrex energy in this, so as to ensure thermal-collecting tube
Vacuum leakproofness.
The transmitance of middle Pyrex of the invention is 91.5 ~ 92%（The full spectrum of solar energy）, so using borosilicate glass in this
When glass makes solar vacuum heat-collecting pipe, sun light transmission rate of Pyrex is high in this, so as to ensure that thermal-collecting tube absorbs big portion
The solar energy for dividing.
The softening point temperature of middle Pyrex of the invention is 785 DEG C ± 10 DEG C, considerably beyond solar energy heat collection pipe highest
Temperature in use（550℃）, it is possible to using Pyrex in this as thermal-collecting tube material.
Middle Pyrex of the invention resistance to mechanical impact for diameter 30mm steel balls in the free drop impact of 80cm eminences not
Breakage, when so making thermal-collecting tube using Pyrex in this, has certain impact resistance, so that spoilage is low.
Its tensile strength after Pyrex in this and kovar alloy sealing-in is big（Maximum 27KN）, cold-resistant thermal shock resistance properties it is strong
（Temperature difference >=220 DEG C）, vacuum sealing performance it is good（<5×10-10Pa·L/m3）.
Specific embodiment
To describe technology contents of the invention in detail, realizing target effect, it is explained in detail below in conjunction with implementation method.
Embodiment 1
The middle Pyrex of the present embodiment, by following weight ratio（Based on oxide）Component constitute：SiO272%；B2O3
12.8%；Al2O37%；CaO 1.4%；Na2O 4.5%；K2O 2.3%。
Embodiment 2
The middle Pyrex of the present embodiment, by following weight ratio（Based on oxide）Component constitute：SiO273%；B2O3
13.7%；Al2O35.1%；CaO 1.3%；Na2O 3.9%；K2O 3%。
Embodiment 3
The middle Pyrex of the present embodiment, by following weight ratio（Based on oxide）Component constitute：SiO275%；B2O313%；
Al2O37.5%；CaO 0.1%；Na2O 3.3%；K2O 1.1%。
Embodiment 4
The middle Pyrex of the present embodiment, by following weight ratio（Based on oxide）Component constitute：SiO275%；B2O3
13.5%；Al2O37.4%；CaO 0.9%；Na2O 0.5%；K2O 2.7%。
Embodiment 5
The middle Pyrex of the present embodiment, by following weight ratio（Based on oxide）Component constitute：SiO274%；B2O3
13.6%；Al2O36%；CaO 0.3%；Na2O 4.1%；K2O 2%。
Embodiment 6
The middle Pyrex of the present embodiment, by following weight ratio（Based on oxide）Component constitute：SiO274.8%；B2O3
13.6%；Al2O36.8%；CaO 0.8%；Na2O 2.2%；K2O 1.8%。
In the present invention, there is provided middle Pyrex, by following weight ratio（Based on oxide）Component constitute：SiO2 72~
75%；B2O312.8~13.7%；Al2O35.1~7.5%；CaO 0.1~1.4%；Na2O 0.5~4.5%；K2O 1.1~3%。
The physicochemical property of the middle Pyrex in the present invention is：
Average coefficient of linear expansion：α=(5.0±0.1)×10-6K-1(t=20℃~300℃)
Density：ρ=2.32±0.02g/cm3(t=20℃)
Transmitance： 91.5~92%（The full spectrum of solar energy）
Softening point temperature：785℃±10℃
Water resistance：It is I grade at 98 DEG C, is I grade at 121 DEG C
Acid-proof alkaline：It is acidproof S1 grades（DIN 12116-2001）, it is alkaline-resisting A2 grades（GB/T 6580-1997）
Cold-resistant thermal impact：Temperature difference >=220 DEG C
Resistance to mechanical is impacted：Diameter 30mm steel balls are not damaged in the free drop impact of 80cm eminences.
Average coefficient of linear expansion of Pyrex is (5.0 ± 0.1) × 10 in this-6K-1, with kovar alloy（Kovar
4J29）Thermal coefficient of expansion match, so by kovar alloy and this in Pyrex sealing after, due to the expansion for matching
Its swell increment is identical when in use for coefficient, so kovar alloy and the reliable sealing-in of Pyrex energy in this, so as to ensure thermal-collecting tube
Vacuum leakproofness.
Transmitance of Pyrex is 91.5 ~ 92% in this（The full spectrum of solar energy）, so being made using Pyrex in this
During solar vacuum heat-collecting pipe, sun light transmission rate of Pyrex is high in this, so as to ensure that thermal-collecting tube absorption is most too
Positive energy.
Softening point temperature of Pyrex is 785 DEG C ± 10 DEG C in this, and temperature is used considerably beyond solar energy heat collection pipe highest
Degree（550℃）, it is possible to using Pyrex in this as thermal-collecting tube material.
Resistance to mechanical impact of Pyrex is that diameter 30mm steel balls are not damaged in the free drop impact of 80cm eminences in this, this
When sample makes thermal-collecting tube using Pyrex in this, certain impact resistance is had, so that spoilage is low.
Pyrex and kovar alloy process for sealing in this：During sealing-in, the kovar alloy and middle boron that will be processed by annealing in hydrogen atmosphere
Kovar alloy is injected glass end face about 5mm while heated to more than 500 DEG C by silica glass when glass is in molten state（Glass wall
Thickness is more than can cut down wall thickness）, now glass and kovar alloy complete double edge sealing-in.
In this after borosilicate glass tube and kovar alloy sealing-in, tensile strength test, cold and hot is carried out to glass-to-metal sealing section
Shock-testing and vacuum sealing performance are tested, and its result is：Tensile resistence, maximum 27KN；Cold-resistant thermal shock resistance properties, temperature difference >=
220℃；Vacuum sealing performance,<5×10-10Pa·L/m3.
Embodiments of the invention are the foregoing is only, the scope of the claims of the invention is not thereby limited, it is every to utilize this hair
The equivalent transformation that bright description is made, or other related technical fields are directly or indirectly used in, similarly it is included in
In scope of patent protection of the invention.
Claims (3)
1. a kind of middle Pyrex, it is characterised in that by following weight than component constitute：SiO272~75%；B2O3 12.8~
13.7%；Al2O35.1~7.5%；CaO 0.1~1.4%；Na2O 0.5~4.5%；K2O 1.1~3%。
2. middle Pyrex according to claim 1, it is characterised in that the component of optimum weight ratio is configured to：SiO2
72%；B2O312.8%；Al2O37%；CaO 1.4%；Na2O 4.5%；K2O 2.3%。
3. the application of the middle Pyrex according to claim 1 to 2 any one, it is characterised in that at will be by annealing in hydrogen atmosphere
Kovar alloy is injected glass while heated to more than 500 DEG C by the kovar alloy of reason and middle Pyrex when glass is in molten state
Glass end face about 5mm, now glass and kovar alloy complete double edge sealing-in.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710195155.9A CN106865978A (en) | 2017-03-29 | 2017-03-29 | A kind of middle Pyrex and its application |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710195155.9A CN106865978A (en) | 2017-03-29 | 2017-03-29 | A kind of middle Pyrex and its application |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106865978A true CN106865978A (en) | 2017-06-20 |
Family
ID=59159421
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710195155.9A Pending CN106865978A (en) | 2017-03-29 | 2017-03-29 | A kind of middle Pyrex and its application |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108455842A (en) * | 2018-02-10 | 2018-08-28 | 山东东方伟民新热力科技有限公司 | A kind of production method of borosilicate glass, glass tube and glass tube |
| CN110553407A (en) * | 2019-09-24 | 2019-12-10 | 陕西宝光真空电器股份有限公司 | Sealing method of outer glass tube for medium-high temperature vacuum heat collecting tube |
| CN112694254A (en) * | 2021-01-04 | 2021-04-23 | 河北光兴半导体技术有限公司 | Medium borosilicate glass composition, medium borosilicate glass, and preparation method and application thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1657460A (en) * | 2004-02-18 | 2005-08-24 | 肖特股份有限公司 | Application of glass for glass-metal composite |
| WO2013046732A1 (en) * | 2011-09-30 | 2013-04-04 | 旭硝子株式会社 | Glass for solar-heat-collecting tube, glass tube for solar-heat-collecting tube, and solar-heat-collecting tube |
| CN104176931A (en) * | 2014-07-21 | 2014-12-03 | 沧州四星玻璃制管有限公司 | Special neutral borosilicate glass tube for solar medium/high-temperature heat collection tubes and manufacturing method thereof |
-
2017
- 2017-03-29 CN CN201710195155.9A patent/CN106865978A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1657460A (en) * | 2004-02-18 | 2005-08-24 | 肖特股份有限公司 | Application of glass for glass-metal composite |
| WO2013046732A1 (en) * | 2011-09-30 | 2013-04-04 | 旭硝子株式会社 | Glass for solar-heat-collecting tube, glass tube for solar-heat-collecting tube, and solar-heat-collecting tube |
| CN104176931A (en) * | 2014-07-21 | 2014-12-03 | 沧州四星玻璃制管有限公司 | Special neutral borosilicate glass tube for solar medium/high-temperature heat collection tubes and manufacturing method thereof |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108455842A (en) * | 2018-02-10 | 2018-08-28 | 山东东方伟民新热力科技有限公司 | A kind of production method of borosilicate glass, glass tube and glass tube |
| CN110553407A (en) * | 2019-09-24 | 2019-12-10 | 陕西宝光真空电器股份有限公司 | Sealing method of outer glass tube for medium-high temperature vacuum heat collecting tube |
| CN112694254A (en) * | 2021-01-04 | 2021-04-23 | 河北光兴半导体技术有限公司 | Medium borosilicate glass composition, medium borosilicate glass, and preparation method and application thereof |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170620 |
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