CN211125557U - Lanthanum hexaboride cathode - Google Patents
Lanthanum hexaboride cathode Download PDFInfo
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- CN211125557U CN211125557U CN201922415527.1U CN201922415527U CN211125557U CN 211125557 U CN211125557 U CN 211125557U CN 201922415527 U CN201922415527 U CN 201922415527U CN 211125557 U CN211125557 U CN 211125557U
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- lanthanum hexaboride
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Abstract
The utility model discloses a lanthanum hexaboride negative pole, including the AEI base, AEI base both sides alternate the rigid coupling respectively and have the pin, are equipped with ceramic sheath between the pin, and ceramic sheath both sides are respectively through supporting area and pin upper end rigid coupling, set up the internal thread in the ceramic sheath, are equipped with cathode spare in the ceramic sheath, and cathode spare is offered the external screw thread and is passed through the ceramic post that threaded connection's mode and ceramic sheath are connected and insert the cable heating rod of establishing ceramic post central point position including the outside, and the carbon hoop has been cup jointed on cable heating rod top, and the carbon hoop intussuseption is equipped with the lanthanum hexaboride crystal. The utility model discloses a ceramic cover's setting, through ceramic post and the ceramic cover threaded connection with the negative pole piece, convenient to detach installs, and then does benefit to the maintenance change of negative pole piece and wherein each part.
Description
Technical Field
The utility model belongs to electron source field, concretely relates to lanthanum hexaboride negative pole.
Background
The lanthanum hexaboride single crystal is a crystal with a special structure, has good electrical conductivity of metal and low work function, and can obtain a direct current emission current of 0-100A/cm 2 when working at 1400-1680 ℃, which is far better than an oxide and a pure metal cathode.
In the prior art, a ceramic column of a cathode piece in a lanthanum hexaboride cathode is directly and fixedly connected with the upper end of a pin through a supporting belt, when the cathode piece or one of the cathode piece and the pin needs to be maintained and replaced, the cathode piece is difficult to directly detach from the pin, and the installation at the later stage is troublesome even if the cathode piece or one of the cathode piece and the pin needs to be maintained and replaced; or when the cathode piece needs to be replaced, the supporting belt is replaced together, and the cost is increased while the material is consumed.
SUMMERY OF THE UTILITY MODEL
The utility model provides a lanthanum hexaboride negative pole is equipped with the ceramic cover to the not enough that prior art exists, with the ceramic post and the ceramic cover threaded connection of negative pole piece, convenient to detach installs, and then does benefit to and maintains the change.
The utility model discloses a realize through following technical scheme: the utility model provides a lanthanum hexaboride negative pole, includes the AEI base, AEI base both sides alternate the rigid coupling respectively and have the pin, be equipped with the ceramic sheath between the pin, the ceramic sheath both sides respectively through support the area with pin upper end rigid coupling, set up the internal thread in the ceramic sheath, be equipped with cathode spare in the ceramic sheath, cathode spare including the outside set up the external screw thread and through threaded connection the ceramic cover connect the ceramic post and insert the cable heating rod of establishing ceramic post central point, the carbon hoop has been cup jointed on cable heating rod top, the carbon hoop intussuseption is equipped with lanthanum hexaboride crystal.
The AEI base is cylindrical.
The supporting belt is detachably connected with the upper end of the pin through a fastening screw.
The lanthanum hexaboride crystal is of a cylindrical structure, and the top end of the cylinder is in a cone configuration.
Compared with the prior art, the beneficial effects of the utility model are that: the utility model discloses a ceramic cover's setting, through ceramic post and the ceramic cover threaded connection with the negative pole piece, convenient to detach installs, and then does benefit to the maintenance change of negative pole piece and wherein each part.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
In the drawings: an AEI base; 2. a pin; 3. a support band; 4. a ceramic sheath; 5. a cathode member; 51. a ceramic post; 52. a cable heating rod; 6. a carbon hoop; 7. lanthanum hexaboride crystals.
Detailed Description
The lanthanum hexaboride cathode shown in fig. 1 in the drawings of the specification comprises an AEI base 1, wherein pins 2 are respectively inserted and fixedly connected to two sides of the AEI base 1, ceramic sleeves 4 are arranged between the pins 2, two sides of each ceramic sleeve 4 are respectively fixedly connected to the upper ends of the pins 2 through supporting bands 3, internal threads are formed in the ceramic sleeves 4, cathode pieces 5 are arranged in the ceramic sleeves 4, each cathode piece 5 comprises a ceramic column 51 and a cable heating rod 52, the ceramic column 51 is externally provided with external threads and is connected with the ceramic sleeves 4 in a threaded connection mode, the cable heating rod 52 is inserted in the center of the ceramic column 51, a carbon hoop 6 is sleeved at the top end of the cable heating rod 52, and lanthanum hexaboride crystals 7 are filled in the carbon hoop 6.
The AEI base 1 is cylindrical.
The supporting band 3 is detachably connected with the upper end of the pin 2 through a fastening screw.
The lanthanum hexaboride crystal 7 is in a cylindrical structure, and the top end of the cylinder is in a cone configuration.
The utility model discloses a ceramic cover's setting, through ceramic post and the ceramic cover threaded connection with the negative pole piece, convenient to detach installs, and then does benefit to the maintenance change of negative pole piece and wherein each part.
In summary, the present invention is only a preferred embodiment, and is not intended to limit the scope of the present invention, and all equivalent changes and modifications of the shapes, structures, features and spirit described in the claims of the present invention should be included in the scope of the present invention.
Claims (4)
1.A lanthanum hexaboride cathode characterized by: including AEI base (1), AEI base (1) both sides alternate the rigid coupling respectively and have pin (2), be equipped with ceramic cover (4) between pin (2), ceramic cover (4) both sides respectively through supporting area (3) with pin (2) upper end rigid coupling, the internal thread has been seted up in ceramic cover (4), be equipped with cathode spare (5) in ceramic cover (4), cathode spare (5) including the outside seted up the external screw thread and through threaded connection the mode with ceramic post (51) that ceramic cover (4) are connected and insert cable heating rod (52) of establishing at ceramic post (51) central point, carbon hoop (6) have been cup jointed on cable heating rod (52) top, carbon hoop (6) intussuseption is equipped with lanthanum hexaboride crystal (7).
2. The lanthanum hexaboride cathode according to claim 1 wherein: the AEI base (1) is cylindrical.
3. The lanthanum hexaboride cathode according to claim 1 wherein: the supporting belt (3) is detachably connected with the upper end of the pin (2) through a fastening screw.
4. The lanthanum hexaboride cathode according to claim 1 wherein: the lanthanum hexaboride crystal (7) is of a cylindrical structure, and the top end of the cylinder is of a conical configuration.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922415527.1U CN211125557U (en) | 2019-12-28 | 2019-12-28 | Lanthanum hexaboride cathode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922415527.1U CN211125557U (en) | 2019-12-28 | 2019-12-28 | Lanthanum hexaboride cathode |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211125557U true CN211125557U (en) | 2020-07-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922415527.1U Active CN211125557U (en) | 2019-12-28 | 2019-12-28 | Lanthanum hexaboride cathode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211125557U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112103154A (en) * | 2020-09-22 | 2020-12-18 | 成都创元电子有限公司 | Indirect-heating lanthanum hexaboride cathode |
-
2019
- 2019-12-28 CN CN201922415527.1U patent/CN211125557U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112103154A (en) * | 2020-09-22 | 2020-12-18 | 成都创元电子有限公司 | Indirect-heating lanthanum hexaboride cathode |
| CN112103154B (en) * | 2020-09-22 | 2023-11-14 | 成都创元电子有限公司 | Indirect heating lanthanum hexaboride cathode |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20220629 Address after: No3, No4, no31-2, xingchuangtiandi, No. 1449, Wenchang East Road, Xiannv Town, Jiangdu District, Yangzhou City, Jiangsu Province, 225000 Patentee after: Jiangsu pailaite Photoelectric Technology Co.,Ltd. Address before: 225000 17 Shawan South Road, Guangling Industrial Park, Guangling District, Yangzhou City, Jiangsu Province Patentee before: Jiangsu plasma Machinery Co.,Ltd. |