Ceramic metal halide lamp for table lamp and preparation method

Abstract

The invention belongs to the technical field of electricity, and relates to a ceramic metal halide lamp for a table lamp and a preparation method. The invention aims to solve the problem of how to use a metal halide lamp as a table lamp. The invention provides a ceramic metal halide lamp for a table lamp, which comprises an electric arc tube, the electric arc tube is arranged in a shell, two ends of the electric arc tube are welded with a niobium rod through a molybdenum rod, a sheet getter is welded on the molybdenum rod, the shell is made of semitransparent alumina ceramics, two ends of the shell are provided with ceramic plugs, one end of the shell is a split ceramic plug, and two ends of the shell are integral ceramic plugs. One end of the electric arc tube is inserted into the integral porcelain plug, and the other end is provided with the split porcelain plug and sealed through the solder ring. The table lamp is compact in structure and very suitable for being used in table lamps; the ceramic shell is semitransparent ceramic, fluorescent powder spraying is not needed, and environmental protection is achieved; a vacuum furnace sealing process and an electric arc tube sealing process are adopted, the lamp tube is inserted into a mold, 10-16 lamp tubes can be sealed at a time, the sealing efficiency is high, and the consistency is better.

Description

Technical Field

[0001] The invention belongs to the field of electrical technology and relates to a ceramic metal halide lamp for a table lamp and a preparation method thereof. Background Art

[0002] Table lamps are household appliances used for lighting in people's lives. Currently, most of the bulbs used in table lamps are LED bulbs. LED table lamps are table lamps that use light-emitting diodes as light sources, which can directly convert electricity into light. However, the longer the LED lamp is turned on, the faster the phosphor in the light source decays, resulting in the blue light band that the human eye is exposed to becoming increasingly intense, causing damage to the human eye. Therefore, long-term exposure to LED light sources can easily cause dizziness, discomfort, and even eye damage, increasing the risk of eye diseases. Ceramic metal halide lamps are a point light source with no purple light rendering, continuous spectrum, and natural white light. They are harmless to the eyes and are particularly suitable as table lamp light sources. However, due to their large size, ceramic metal halide lamps are inconvenient to use as table lamps. Summary of the invention

[0003] 1. Technical problems to be solved: Metal halide lamps are large in size. How to use metal halide lamps as desk lamps?

[0004] 2. Technical solution: In order to solve the above problems, the present invention provides a ceramic metal halide lamp for a table lamp, including an arc tube, wherein the arc tube is arranged in an outer shell, the two ends of the arc tube are welded to a niobium rod through a molybdenum rod, and a sheet-like getter is welded to the molybdenum rod. The outer shell is a translucent alumina ceramic, and ceramic plugs are arranged at both ends of the outer shell, one end is a split ceramic plug, and the other end is an integral ceramic plug. One end of the arc tube is inserted into the integral ceramic plug, and the other end is installed with the split ceramic plug, and is sealed by a solder ring.

[0005] The shell material is a mixture of aluminum oxide, zirconium oxide, magnesium oxide, cerium oxide and titanium oxide.

[0006] The mass percentage of the zirconium oxide is 0.001-0.5‰; the mass percentage of the magnesium oxide is 0.001-0.5‰; the mass percentage of the cerium oxide is 0.001-0.5‰, the mass percentage of the titanium oxide is 0.5-1‰, and the rest is aluminum oxide.

[0007] The solder ring comprises a large solder ring, a first small solder ring and a second small solder ring of the same structure. The large solder ring is located between the ceramic plug and the shell at one end, the first small solder ring is located between the niobium rod and the ceramic plug at one end, and the second small solder ring is located between the niobium rod and the ceramic plug at the other end.

[0008] The present invention also provides a method for preparing the ceramic metal halide lamp for a desk lamp, comprising the following steps: Step S01: preparing a shell.

[0009] Step S02: insert the shell into the mold with one end facing upward and the other end facing downward, then insert the arc tube 4 with the molybdenum rod and the niobium rod welded into the shell, and install the split ceramic plug, the first large solder ring and the small solder ring on one end.

[0010] Step S03: Place the sample into a vacuum sealing furnace and perform sealing at 1300-1500° C. under an argon atmosphere.

[0011] Step S04: After one end is sealed and cooled, the two ends are sealed, and the lamp with one end sealed is turned around and inserted into the mold to assemble the second large solder ring.

[0012] Step S05: After entering the vacuum sealing furnace and evacuating the vacuum, the two ends are sealed at 1250-1350° C., and the preparation is completed.

[0013] 3. Beneficial effects: The invention has a compact structure and is very suitable for use in table lamps; the ceramic shell is translucent ceramic, does not need to be sprayed with fluorescent powder, and is more environmentally friendly; a vacuum furnace is used for sealing, and the arc tube sealing process is used to insert the lamp tube into the mold, and 10-16 lamps can be sealed at a time with high sealing efficiency and better consistency. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the present invention.

[0015] Figure 2 Ceramic shell diagram Figure 3 This is a schematic diagram of the ceramic metal halide lamp sealing mold.

[0016] Explanation of the reference numerals: 1. arc tube; 2. molybdenum rod; 3. getter; 4. ceramic shell; 5. niobium rod; 6. split ceramic plug; 7-1. large solder ring; 7-2. first small solder ring; 7-3 second small solder ring. DETAILED DESCRIPTION

[0017] The present invention is described in detail below with reference to the accompanying drawings and embodiments.

[0018] like Figure 1 As shown, a ceramic metal halide lamp for a desk lamp comprises an arc tube 1, wherein the arc tube 1 is arranged in a shell 4, wherein both ends of the arc tube 1 are welded to a niobium rod 5 via a molybdenum rod 2, and a sheet-like getter 3 is welded to the molybdenum rod 2. The shell 4 is a translucent alumina ceramic having a UV filtering function, and ceramic plugs are arranged at both ends of the shell 4, wherein one end is a split ceramic plug 6 and the other ends are integral ceramic plugs, wherein one end of the arc tube 1 is inserted into the integral ceramic plug and the other end is installed with the split ceramic plug 6, and the arc tube 1 is sealed by a solder ring.

[0019] This patent is for ceramic tube materials. The original quartz tube can only be sealed by pressure, so the finished product is larger in size. The outer tube of the ceramic metal halide lamp in this patent is a ceramic tube, which uses a sealing process similar to that of the arc tube, using high temperature to melt the solder ring between the ceramic plug and the ceramic tube for sealing.

[0020] Because the original ceramic metal halide lamp is a quartz tube compression process, the compression end must have a molybdenum sheet assembly to lead out the conductivity, and the compression end is relatively long, so the entire structure is relatively large.

[0021] In one embodiment, the shell 4 is made of a mixture of aluminum oxide, zirconium oxide, magnesium oxide, cerium oxide and titanium oxide. The two components of zirconium oxide and magnesium oxide can effectively inhibit the growth of aluminum oxide crystals, so that the size of aluminum oxide crystals remains within a suitable range. The two components of cerium oxide and titanium oxide make the aluminum oxide ceramic have a UV filter function. In one embodiment, the mass percentage of zirconium oxide is 0.001-0.5‰; the mass percentage of magnesium oxide is 0.001-0.5‰; the mass percentage of cerium oxide is 0.001-0.5‰, the mass percentage of titanium oxide is 0.5-1‰, and the rest is aluminum oxide.

[0022] In one embodiment, the solder ring comprises a large solder ring (7-1), a first small solder ring (7-2) with the same structure, and a second small solder ring (7-3), wherein the large solder ring (7-1) is located between the ceramic plug at one end and the housing (4), the first small solder ring (7-2) is located between the niobium rod (5) and the ceramic plug at one end, and the second small solder ring (7-3) is located between the niobium rod (5) and the ceramic plug at the other end.

[0023] The present invention also provides a method for preparing the ceramic metal halide lamp for a desk lamp, comprising the following steps: Step S01: preparing a shell.

[0024] Step S02: insert the shell 4 into the mold with one end facing upward and the other end facing downward, then insert the arc tube 4 with the molybdenum rod 2 and the niobium rod 5 welded into the shell 4, and install the split ceramic plug 6, the solder ring 7-1 and the first small solder ring 7-2 on one end.

[0025] Step S03: Place the sample into a vacuum sealing furnace and perform sealing at 1300-1500° C. under an argon atmosphere.

[0026] Step S04: After one end is sealed and cooled, the two ends are sealed, and the lamp with one sealed end is turned around and inserted into the mold to assemble the second small solder ring 7-3.

[0027] Step S05: After entering the vacuum sealing furnace and evacuating the vacuum, the two ends are sealed at 1250-1350° C., and the preparation is completed.

[0028] In one embodiment, the mold is provided with a plurality of holes for placing the shell 4. The mold of the present invention has 10-16 holes.

[0029] Because of the mold and process, the outer tube of the existing double-ended lamp is a quartz tube, which is sealed on a press-sealing machine, that is, it is first melted and then sealed, and only one end can be sealed each time, and then the other end. The outer tube of the ceramic metal halide lamp of the present invention is a ceramic tube, which is sealed in a sealing furnace in a glove box, similar to the sealing process of arc tubes, and the lamp tube is inserted into the mold, so 10-16 can be sealed at a time.

[0030] In one embodiment, the method for preparing the housing 4 comprises the following steps: Step S61: Mix aluminum oxide, zirconium oxide, magnesium oxide, cerium oxide and titanium oxide powders, add deionized water and binder powders, mix, and add deionized water and binder.

[0031] Step S62: Add the above mixture into a ball mill and grind for 11-13 hours, preferably 12 hours.

[0032] Step S63: Granulate the mixture, add the mixture particles into an isostatic pressing machine and press them into a tube. The ceramic plug is formed by an injection molding machine.

[0033] Step S64: pre-sinter the tube and the porcelain plug, and then assemble the porcelain plug at one end of the porcelain tube and put it into the hydrogen burning furnace to sinter it into a semi-split porcelain tube.

Claims

1. A ceramic metal halide lamp for a desk lamp, comprising an arc tube (1), the arc tube (1) being arranged in a housing (4), the two ends of the arc tube (1) being welded to a niobium rod (5) via a molybdenum rod (2), a sheet-like getter (3) being welded to the molybdenum rod (2), and characterized in that: The shell (4) is made of translucent alumina ceramics. Ceramic plugs are arranged at both ends of the shell (4), one end is a split ceramic plug (6), and the other end is an integral ceramic plug. The arc tube (1) has one end inserted into the integral ceramic plug and the other end mounted with the split ceramic plug (6), and is sealed by a solder ring.

2. The ceramic metal halide lamp for a desk lamp as claimed in claim 1, characterized in that: The material of the shell (4) is a mixture of aluminum oxide, zirconium oxide, magnesium oxide, cerium oxide and titanium oxide.

3. The ceramic metal halide lamp for a desk lamp as claimed in claim 2, characterized in that: The mass percentage of the zirconium oxide is 0.001-0.5‰; the mass percentage of the magnesium oxide is 0.001-0.5‰; the mass percentage of the cerium oxide is 0.001-0.5‰, the mass percentage of the titanium oxide is 0.5-1‰, and the rest is aluminum oxide.

4. The ceramic metal halide lamp for a desk lamp as claimed in claim 1, characterized in that: The solder ring comprises a large solder ring (7-1), a first small solder ring (7-2) having the same structure, and a second small solder ring (7-3); the large solder ring (7-1) is located between a ceramic plug at one end and a housing (4); the first small solder ring (7-2) is located between a niobium rod (5) and the ceramic plug at one end; and the second small solder ring (7-3) is located between the niobium rod (5) and the ceramic plug at the other end.

5. A method for preparing a ceramic metal halide lamp for a desk lamp as claimed in any one of claims 1 to 4, characterized in that: The following steps are involved: Step S01: preparing a shell; Step S02: insert the housing (4) into the mold with one end facing upward and the other end facing downward, then insert the arc tube (4) with the molybdenum rod (2) and the niobium rod (5) welded into the housing (4), and install the split ceramic plug (6), the solder ring (7-1) and the first small solder ring (7-2) on one end; Step S03: entering a vacuum sealing furnace and sealing at 1300-1500° C. under an argon atmosphere; Step S04: After one end is sealed and cooled, the two ends are sealed again, and the lamp with one end sealed is turned around and inserted into the mold to assemble the second small solder ring (7-3); Step S05: After entering the vacuum sealing furnace and evacuating the vacuum, the two ends are sealed at 1250-1350° C., and the preparation is completed.

6. The preparation method according to claim 5, characterized in that: The preparation method of the shell (4) is as follows: Step S61: firstly, aluminum oxide, zirconium oxide, magnesium oxide, cerium oxide and titanium oxide powders are mixed, and deionized water and a binder are added; Step S62: adding the above mixture into a ball mill and grinding for 11-13 hours; Step S63: the mixture is then granulated, and the mixture particles are added to an isostatic pressing machine to be pressed into a tube shape, and the ceramic plug is formed by an injection molding machine; Step S64: Finally, the tube and the porcelain plug are pre-sintered, and after sintering, one end of the porcelain tube is assembled with the porcelain plug and put into the hydrogen burning furnace to sinter into a semi-split porcelain tube.

7. The preparation method according to claim 5, characterized in that: The mold is provided with a plurality of holes for placing the outer shell (4).

8. The preparation method according to claim 7, characterized in that: The number of the holes is 10-16.

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