CN214032255U - High thermal shock nature sealing glass prefab - Google Patents
High thermal shock nature sealing glass prefab Download PDFInfo
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- CN214032255U CN214032255U CN202022188907.9U CN202022188907U CN214032255U CN 214032255 U CN214032255 U CN 214032255U CN 202022188907 U CN202022188907 U CN 202022188907U CN 214032255 U CN214032255 U CN 214032255U
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- sealing glass
- ceramic layer
- thermal shock
- high thermal
- sealing
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Abstract
The utility model discloses a high thermal shock sealing glass prefabricated member which is used for sealing a preformed hole of a metal shell and comprises sealing glass, wherein the sealing glass is provided with at least one through hole for a metal lead to pass through; the end of the sealing glass facing the outside of the metal shell is provided with a ceramic layer, the melting point of the ceramic layer is more than 1000 ℃, and the thermal expansion of the ceramic layerExpansion coefficient less than or equal to 11 x 10‑6/° c; the through hole penetrates through the ceramic layer. Because the utility model discloses a sealing glass sets up towards the outer one end of metal casing the ceramic layer, ceramic layer coefficient of thermal expansion is little, and thermal shock resistance is high, at the thermal cycle in-process, can keep out and postpone most thermal transmission, plays better guard action to its inboard sealing glass to realize the holistic high thermal shock nature of prefab.
Description
Technical Field
The utility model relates to a glass product, in particular to a high thermal shock sealing glass prefabricated member.
Background
The sensor or the chip is usually packaged in the metal protection shell to ensure that the performance of the sensor or the chip is not influenced by the temperature and the humidity of the external environment, so that the service life of the device is prolonged, and the accuracy is ensured. The lead wire penetrates through the metal protective shell to provide power supply, signals or other required detection information for the sensor or the chip.
In the field of packaging, only glass-to-metal seals and metal-to-metal welds are hermetic seals. In a device with a metal lead penetrating through a metal shell, the metal-metal welding is conductive, so that the connection part of the metal lead and the metal shell can be connected only by adopting sealing glass.
Because the thermal expansion coefficient of metal is large, in order to realize a good sealing effect, the sealing glass is required to have a thermal expansion coefficient which is matched with that of metal, but the glass with a high thermal expansion coefficient belongs to soft glass, and the strength and the thermal shock resistance are poor. Microcracks are easy to appear in the long-term high-low temperature cycle process, so that the air tightness is failed; cracking is easy to occur in a high-strength quenching shock heating cycle (500 ℃ to 0 ℃).
SUMMERY OF THE UTILITY MODEL
The utility model provides a high thermal shock nature sealing-in glass prefab to the technical problem that prior art exists.
The utility model provides a technical scheme that its technical problem adopted is:a high-thermal-shock sealing glass prefabricated member is used for sealing a preformed hole of a metal shell and comprises sealing glass, wherein the sealing glass is provided with at least one through hole for a metal lead to pass through; the end of the sealing glass facing the outside of the metal shell is provided with a ceramic layer, the melting point of the ceramic layer is more than 1000 ℃, and the thermal expansion coefficient of the ceramic layer is less than or equal to 11 multiplied by 10-6/° c; the through hole penetrates through the ceramic layer.
Further, the ceramic layer is made of one or more of cordierite, 95 porcelain, silicon carbide, mullite, alumina, yttria, zirconia and talc.
Further, the thickness of the ceramic layer is 1-3 mm.
Further, the sealing glass has a thermal expansion coefficient of 5 × 10-6～11×10-6And/or the sealing temperature of the sealing glass is 600-1000 ℃.
Further, the ceramic layer and the sealing glass are integrally formed.
Further, the ceramic layer covers the end face of one end, facing the outside of the metal shell, of the sealing glass on the whole.
Furthermore, the sealing glass and the ceramic layer are cylindrical, the thickness of the sealing glass is larger than that of the ceramic layer, and the diameter of the sealing glass is consistent with that of the ceramic layer.
Compared with the prior art, the utility model discloses following beneficial effect has:
because the utility model discloses a sealing glass sets up towards the outer one end of metal casing the ceramic layer, ceramic layer coefficient of thermal expansion is little, and thermal shock resistance is high, at the thermal cycle in-process, can keep out and postpone most thermal transmission, plays better guard action to its inboard sealing glass to realize the holistic high thermal shock nature of prefab.
The present invention will be described in further detail with reference to the accompanying drawings and examples; however, the sealing glass preform with high thermal shock property of the present invention is not limited to the embodiment.
Drawings
Fig. 1 is a schematic structural diagram of the first embodiment of the present invention;
fig. 2 is a schematic structural diagram of the second embodiment of the present invention.
Detailed Description
Example one
Referring to fig. 1, the sealing glass preform with high thermal shock property of the present invention is used for sealing a preformed hole of a metal shell, and includes a sealing glass 1, wherein the sealing glass 1 is provided with a through hole 3 for a metal lead to pass through; the end of the sealing glass 1 facing the outside of the metal shell is provided with a ceramic layer 2, and the ceramic layer 2 covers the whole end face of the end of the sealing glass 1 facing the outside of the metal shell. The melting point of the ceramic layer 2 is more than 1000 ℃, and the thermal expansion coefficient of the ceramic layer 2 is less than or equal to 11 multiplied by 10-6The thickness of the ceramic layer 2 is 1 to 3 mm/DEG C. The through-hole 3 penetrates the ceramic layer 2.
In this embodiment, the material of the ceramic layer 2 is one or more of cordierite, 95 porcelain, silicon carbide, mullite, alumina, yttria, zirconia, talc, and the like.
In this embodiment, the sealing glass 1 has a thermal expansion coefficient of 5 × 10-6～11×10-6And/or the sealing temperature of the sealing glass 1 is 600-1000 ℃. The sealing glass 1 should have a thermal expansion coefficient between the metal lead and the metal casing.
In this embodiment, the ceramic layer 2 and the sealing glass 1 are obtained by integral molding and heat treatment.
In this embodiment, the sealing glass 1 and the ceramic layer 2 are both cylindrical, the thickness of the sealing glass 1 is greater than that of the ceramic layer 2, and the diameter of the sealing glass 1 is consistent with that of the ceramic layer 2.
The utility model discloses a high thermal shock nature sealing-in glass prefab, its preparation flow includes following step:
1) respectively granulating the sealing glass powder and the ceramic powder to obtain particles with good fluidity of 60-80 meshes;
2) in the process of press dry pressing and forming, glass granulating materials are firstly sealed and then ceramic granulating materials are added;
3) directly pressing and forming by adopting 1-6 t of pressure;
4) according to the characteristics of the sealing glass, the glass forming is carried out within the softening temperature range of +/-50 ℃.
The integral forming process is characterized in that 1% -5% of sealing glass powder is added during ceramic powder granulation.
The utility model discloses a high thermal shock nature sealing glass prefab embodies with the table form below the utility model discloses a thermal shock resistance experimental result:
therefore, the utility model discloses at the thermal cycle in-process, can utilize the ceramic layer to keep out and postpone most thermal transmission, play better guard action to its inboard sealing glass to realize the holistic high thermal shock nature of prefab.
Example two
Referring to fig. 2, the difference between the high thermal shock sealing glass preform of the present invention and the first embodiment is: the sealing glass 1 is provided with two through holes 3, and the two through holes 3 respectively penetrate through the ceramic layer 2 and can be used for two metal leads to penetrate through. Therefore, the utility model discloses constitute the diplopore prefab, nevertheless increase or reduce the size or the quantity of through-hole, can not influence the essence of the utility model design.
The above embodiments are only used to further illustrate the present invention, but the present invention is not limited to the embodiments, and any simple modification, equivalent change and modification of the technical entity of the present invention to the above embodiments all fall into the protection scope of the present invention.
Claims (7)
1. A sealing glass preform with high thermal shock property for sealing connectionThe preformed hole of the metal shell comprises sealing glass, and the sealing glass is provided with at least one through hole for the metal lead to pass through; the method is characterized in that: the end of the sealing glass facing the outside of the metal shell is provided with a ceramic layer, the melting point of the ceramic layer is more than 1000 ℃, and the thermal expansion coefficient of the ceramic layer is less than or equal to 11 multiplied by 10-6/° c; the through hole penetrates through the ceramic layer.
2. A high thermal shock sealing glass preform according to claim 1, wherein: the ceramic layer is made of one of cordierite, 95 porcelain, silicon carbide, mullite, alumina, yttrium oxide, zirconium oxide and talc.
3. A high thermal shock sealing glass preform according to claim 1, wherein: the thickness of the ceramic layer is 1-3 mm.
4. A high thermal shock sealing glass preform according to claim 1, wherein: the sealing glass has a thermal expansion coefficient of 5 × 10-6～11×10-6And/or the sealing temperature of the sealing glass is 600-1000 ℃.
5. A high thermal shock sealing glass preform according to claim 1, wherein: the ceramic layer and the sealing glass are integrally formed.
6. A high thermal shock sealing glass preform according to claim 1, wherein: the ceramic layer covers the end face of one end, facing the outside of the metal shell, of the sealing glass completely.
7. A high thermal shock sealing glass preform according to claim 1, wherein: the sealing glass and the ceramic layer are both cylindrical, the thickness of the sealing glass is larger than that of the ceramic layer, and the diameter of the sealing glass is consistent with that of the ceramic layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022188907.9U CN214032255U (en) | 2020-09-29 | 2020-09-29 | High thermal shock nature sealing glass prefab |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022188907.9U CN214032255U (en) | 2020-09-29 | 2020-09-29 | High thermal shock nature sealing glass prefab |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214032255U true CN214032255U (en) | 2021-08-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022188907.9U Active CN214032255U (en) | 2020-09-29 | 2020-09-29 | High thermal shock nature sealing glass prefab |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214032255U (en) |
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2020
- 2020-09-29 CN CN202022188907.9U patent/CN214032255U/en active Active
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