CN210778670U - Clamping piece for die for producing rare earth eutectic phosphors with different thicknesses by guide die method - Google Patents
Clamping piece for die for producing rare earth eutectic phosphors with different thicknesses by guide die method Download PDFInfo
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- CN210778670U CN210778670U CN201921993897.7U CN201921993897U CN210778670U CN 210778670 U CN210778670 U CN 210778670U CN 201921993897 U CN201921993897 U CN 201921993897U CN 210778670 U CN210778670 U CN 210778670U
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Abstract
The utility model discloses a clamping piece for a mold for producing rare earth eutectic fluorophors with different thicknesses by a guide mold method, wherein the shape of the clamping piece is the same as that of a mold plate of the mold, the clamping piece is a rectangular piece made of molybdenum, a rectangular groove with the same shape and position as those of a channel groove is arranged at the bottom edge of the clamping piece, and a round hole II with the same position and size as those of a round through hole of the mold plate is arranged on the side surface of the clamping piece; clamping the clamping piece between the two templates, penetrating the circular through holes of the two templates and the circular hole II of the clamping piece through the threaded rod, and then screwing and fixing the clamping piece from the outer sides of the two templates by using two nuts; the clamping pieces and the template are aligned and basically overlapped together; tungsten filaments with the diameter of 0.2-0.3mm are wound between the clamping pieces and the template and between the clamping pieces and the threaded rods between the clamping pieces and the template and between the clamping pieces, and the gaps with the diameter of 0.2-0.3mm are kept; growing on the top of the two templates, inoculating seed crystal at the top of the mold, and pulling the molten raw material to obtain the rare earth eutectic phosphor with desired thickness.
Description
Technical Field
The utility model belongs to the production facility field of eutectic fluorophor, in particular to clamping piece for mould of different thickness tombarthite eutectic fluorophor of mold-guiding method production.
Background
White light LEDs have characteristics of high luminous efficiency, low power consumption, long service life, high safety and reliability, environmental protection and the like, and are widely applied to many fields of display screens, automobile industry, backlight sources, roads, houses, landscape lighting and the like in recent years.
The traditional white light LED is obtained by mixing yellow light generated by exciting radiation of blue light chip + Ce: YAG fluorescent powder; in the conventional package structure in which the phosphor is dispersed in the form of particles in the transparent resin, there are the following disadvantages:
1) the refractive index (1.83) of the Ce: YAG fluorescent powder particles is greatly different from the refractive index (1.4-1.6) of silica gel and resin, and strong scattering phenomenon can occur when light enters the fluorescent powder gel (the larger the difference of the refractive index between scattering interfaces is, the stronger the light scattering is), so that the luminous efficiency of the chip is reduced and waste heat is generated;
2) the inconsistency of parameters such as LED color temperature and the like can be caused by the factors such as the fluctuation of the appearance and the particle size of the fluorescent powder, the uneven coating thickness, the precipitation in the dispensing process and the like, additional grading treatment is needed, and the technological process and the cost are additionally increased;
3) because the maximum service temperature of the silica gel is generally 200 ℃, the silica gel can generate performance deterioration even yellowing and cracking after long-time use, and the service life and the reliability of the LED are reduced.
Rare earth eutectic fluorophor (YAG: Ce-Al)2O3) The eutectic phosphor is Y2O3And Al2O3Mixing and doping CeO according to a certain proportion2Then melting, and growing the mixture by cooling according to a certain growth condition; the two crystal phases are mutually staggered in three dimensions to form a complex winding structure, the average size of the two phases is changed in a certain range according to different growth conditions, the macroscopical appearance is better in uniformity, and the problem of nonuniformity caused by sedimentation and the like in a fluorescent powder system is avoided; because the crystal grows from the melt, the two phases are tightly combined on the atomic scale, other defects such as air holes and the like do not exist, and the refractive index is very close to that in the visible light range (YAG: 1.83-1.84, Al2O31.77-1.78), thereby greatly avoiding the back scattering loss of the traditional powder adhesive structure; the tiny refractive index difference can change the light transmission path to a certain extent, the optical waveguide effect of light in a single-phase uniform medium is damaged, the light extraction efficiency of the fluorescent body is improved, and meanwhile, the original blue light of the chip and the yellow light generated by the stimulated radiation of the fluorescent body are better mixed, so that the uniform and divergent white light output is more facilitated on the laser illumination with excellent exciting light direction; meanwhile, two phases forming the eutectic system have good thermal conductivity and thermal stability, so that the eutectic phosphor also has excellent thermal properties of ceramic and single crystal materials.
The inventor independently develops a mould in the process of researching the production of the rare earth eutectic phosphor, and the mould is used for manufacturing and producing the rare earth eutectic phosphor; the specific structure of the device is shown in figures 1-3, and comprises two symmetrically-arranged sheet templates 1, a crucible 2 for placing the templates 1, and a fastening device for fastening the two templates 1 relatively; the two templates 1 are the same in shape and size and are rectangular; the bottom surfaces of the formworks 1 are planes, the bottom surfaces are provided with channel grooves 3, the channel grooves 3 penetrate through the front and the back of the formworks 1, and circular through holes 4 are formed in the same positions of the middle parts of the two formworks 1; the fastening device comprises a threaded rod 5 and nuts 6, the threaded rod 5 is used for penetrating through the circular through holes 4 of the two templates 1, and then the two nuts 6 are used for screwing and fixing the two templates 1 from the outer sides; a gap of 0.2-0.3mm needs to be kept between the two templates 1; winding a tungsten wire with the diameter of 0.2-0.3mm on the threaded rod 5; after the two templates 1 are fastened together, they are vertically placed in the center of the interior of the crucible 2.
The use method of the die comprises the following steps: after the two templates 1 are relatively fastened together, the two templates are vertically placed in the center of the inner part of the crucible 2; will Y2O3And Al2O3Mixing and doping CeO according to a certain proportion2Then sintering treatment is carried out, and then the treated raw materials are placed in a crucible 2 and are filled to ensure that the two templates 1 are kept vertical; then the mould is placed in a growth furnace, raw materials are melted in the growth furnace, due to the capillary effect formed by the gap of 0.2-0.3mm between the two templates 1, the melted raw materials can enter from the channel grooves 3 at the bottoms of the two templates 1 and grow upwards along the gap, the melted raw materials are grown on the top surfaces of the two templates 1, and the seed crystal 7 is connected to the top end of the mould to pull the melted raw materials, so that a single crystal with the shape similar to the edge of the mould can be grown by continuous solidification and crystallization; the temperature of the mould in the growth furnace is about 1800 ℃, so the template 1, the crucible 2 and the fastening device are preferably made of molybdenum, can resist high temperature and ensure the manufacturing requirement; the crystal can be grown by applying the mould; the growth speed is high and can reach dozens of mm/h, the growth interface is stable, and the growth quality is uniform.
The mold is patented, and in subsequent researches, the inventor finds that the mold can only produce eutectic phosphors with one thickness, and cannot produce rare earth eutectic phosphors with different thicknesses according to requirements; therefore, the clamping piece matched with the mould is designed and developed on the basis.
Disclosure of Invention
An object of the utility model is to provide a clamping piece for mould of different thickness tombarthite eutectic fluorophors is produced to die-guiding method for produce the tombarthite eutectic fluorophor of different thickness.
The utility model adopts the technical scheme as follows: a clamping piece for a mold for producing rare earth eutectic phosphors with different thicknesses by a guide mold method is disclosed, wherein the mold comprises two symmetrically-arranged sheet-shaped templates, a crucible for placing the templates and a fastening device for relatively fastening the two templates together; the two templates are the same in shape and size and are rectangular; the bottom surfaces of the templates are planes, and the bottom surfaces are provided with channel grooves which penetrate through the front and the back of the templates; the fastening device comprises a threaded rod and nuts, the threaded rod is used for penetrating through the circular through holes of the two templates and then is screwed and fixed from the outer sides of the two templates by the two nuts; and a tungsten wire with the diameter of 0.2-0.3mm is wound on the threaded rod between the two templates to keep a gap of 0.2-0.3 mm; after the two templates are relatively fastened together, the two templates are vertically placed in the center of the inner part of the crucible; the clamping piece is a rectangular piece made of molybdenum, the bottom edge of the clamping piece is provided with a rectangular groove with the same shape and position as the channel groove, and the side surface of the clamping piece is provided with a circular hole II with the same position and size as the circular through hole of the template; clamping the clamping piece between the two templates, penetrating the circular through holes of the two templates and the circular hole II of the clamping piece through the threaded rod, and then screwing and fixing the clamping piece from the outer sides of the two templates by using two nuts; the clamping pieces and the template are aligned and basically overlapped together; and tungsten filaments with the diameter of 0.2-0.3mm are wound between the clamping pieces and the template and between the clamping pieces and the threaded rods between the clamping pieces and the template and between the clamping pieces, and the gaps with the diameter of 0.2-0.3mm are kept.
Preferably, the clamping piece is a rectangular piece with the thickness of 0.3-0.7 mm.
The beneficial effects of the utility model reside in that: the utility model provides a clamping piece for mould of different thickness tombarthite eutectic fluorophors of mold-guiding method production for produce the tombarthite eutectic fluorophor of different thickness.
Drawings
Fig. 1 is a schematic view of the overall structure of the mold.
Fig. 2 is a schematic view of the disassembled structure of the mold.
FIG. 3 is a cross-sectional view of a template placed in a crucible.
Fig. 4 is a schematic view of a clip.
In the figure: the device comprises a template 1, a crucible 2, a channel groove 3, a through hole 4, a threaded rod 5, a nut 6, seed crystals 7, a clamping piece 8, a rectangular groove 9, a circular hole II 10 and a tungsten filament 11.
Detailed Description
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings, which are only used for illustrating the technical solutions of the present invention and are not limited.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention; furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated; thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other; the specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.
As shown in fig. 1-4, a clamping piece for a mold for producing rare earth eutectic phosphors with different thicknesses by a guide mold method, the mold comprises two symmetrically-arranged sheet-shaped templates 1, a crucible 2 for placing the templates 1, and a fastening device for fastening the two templates 1 relatively; the two templates 1 are the same in shape and size and are rectangular; the bottom surfaces of the formworks 1 are planes, the bottom surfaces are provided with channel grooves 3, the channel grooves 3 penetrate through the front and back surfaces of the formworks 1, and two symmetrical circular through holes 4 are arranged at the same positions in the middle parts of the two formworks 1; the fastening device comprises a threaded rod 5 and nuts 6, the threaded rod 5 is used for penetrating through the circular through holes 4 of the two templates 1, and then the two nuts 6 are used for screwing and fixing the two templates 1 from the outer sides; a gap of 0.2-0.3mm needs to be kept between the two templates 1; a tungsten wire 11 with the diameter of 0.2-0.3mm is wound on the threaded rod 5; after the two templates 1 are relatively fastened together, the two templates are vertically placed in the center of the inner part of the crucible 2; the shape of the clamping piece 8 is the same as that of the template 1, the clamping piece is a molybdenum rectangular piece with the thickness of 0.3-0.7mm, a rectangular groove 9 with the same shape and position as the channel groove 3 is arranged at the bottom edge of the clamping piece, and a circular hole two 10 with the same position and size as the circular through hole 4 of the template 1 is arranged on the side surface of the clamping piece 8.
The use method of the clamping piece 8 comprises the following steps: according to the thickness requirement of the rare earth eutectic phosphor to be produced, a certain number of clamping pieces are selected, the clamping pieces 8 are clamped between the two templates 1, the threaded rods 5 penetrate through the circular through holes 4 of the two templates 1 and the circular holes 10 of the clamping pieces, and then the two templates 1 are screwed and fixed by two nuts 6; the jaws 8 are aligned with the formwork 1, substantially coinciding together; gaps of 0.2-0.3mm are kept between the clamping pieces 8 and the template 1 and between the clamping pieces; tungsten wires 11 with the diameter of 0.2-0.3mm can be wound on the threaded rods 5 between the clamping pieces and the template and between the clamping pieces; the purpose of this is that the melted raw material will enter from the channel groove 3 at the bottom of the two templates 1, grow upwards along the gap between the clamping pieces and the templates and between the clamping pieces, grow out on the top surfaces of the two templates 1, and connect the seed crystal 7 at the top end of the mold to pull the melted raw material, finally to obtain the rare earth eutectic fluorophor with the desired thickness.
Although the present invention has been described in detail with reference to the foregoing examples, it will be apparent to those skilled in the art that modifications may be made to the above-described embodiments, or equivalent changes and modifications may be made to some of the technical features of the embodiments.
Claims (2)
1. A clamping piece for a mold for producing rare earth eutectic phosphors with different thicknesses by a guide mold method is disclosed, wherein the mold comprises two symmetrically-arranged sheet-shaped templates, a crucible for placing the templates and a fastening device for relatively fastening the two templates together; the two templates are the same in shape and size and are rectangular; the bottom surfaces of the templates are planes, and the bottom surfaces are provided with channel grooves which penetrate through the front and the back of the templates; the fastening device comprises a threaded rod and nuts, the threaded rod is used for penetrating through the circular through holes of the two templates and then is screwed and fixed from the outer sides of the two templates by the two nuts; and a tungsten wire with the diameter of 0.2-0.3mm is wound on the threaded rod between the two templates to keep a gap of 0.2-0.3 mm; after the two templates are relatively fastened together, the two templates are vertically placed in the center of the inner part of the crucible; the clamping piece is a rectangular piece made of molybdenum, the bottom edge of the clamping piece is provided with a rectangular groove with the same shape and position as the channel groove, and the side surface of the clamping piece is provided with a circular hole II with the same position and size as the circular through hole of the template; clamping the clamping piece between the two templates, penetrating the circular through holes of the two templates and the circular hole II of the clamping piece through the threaded rod, and then screwing and fixing the clamping piece from the outer sides of the two templates by using two nuts; the clamping piece is aligned with the template; and tungsten filaments with the diameter of 0.2-0.3mm are wound between the clamping pieces and the template and between the clamping pieces and the threaded rods between the clamping pieces and the template and between the clamping pieces, and the gaps with the diameter of 0.2-0.3mm are kept.
2. The clip for mold used in producing rare earth eutectic phosphors of different thicknesses by the guided mode method according to claim 1, wherein: the clamping piece is a rectangular piece with the thickness of 0.3-0.7 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921993897.7U CN210778670U (en) | 2019-11-19 | 2019-11-19 | Clamping piece for die for producing rare earth eutectic phosphors with different thicknesses by guide die method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921993897.7U CN210778670U (en) | 2019-11-19 | 2019-11-19 | Clamping piece for die for producing rare earth eutectic phosphors with different thicknesses by guide die method |
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| Publication Number | Publication Date |
|---|---|
| CN210778670U true CN210778670U (en) | 2020-06-16 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921993897.7U Active CN210778670U (en) | 2019-11-19 | 2019-11-19 | Clamping piece for die for producing rare earth eutectic phosphors with different thicknesses by guide die method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210778670U (en) |
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