Method for manufacturing two-section type ceramic metal halide lamp electric arc tube
The technology of a ceramic metal halide lamp and a manufacturing method, which is applied to the manufacture of ships or lead wires, can solve problems such as air leakage and arc tube cracks, and achieve the effects of simple process, reduced environmental hazards, and good sealing.
Inactive Publication Date: 2014-02-12
XIAMEN HONGLU TUNGSTEN MOLYBDENUM IND CO LTD
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Problems solved by technology
Method 2 requires strict control of the sintering shrinkage between the arc tube parts, and the mismatch of the sintering shrinkage will cause cracks or air leakage in the arc tube
Method used
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Experimental program
Comparison scheme
Effect test
Embodiment 1
[0021] The particle size D was obtained by wet milling 50 0.6μm Al 2 o 3 Powder 998.5g with 0.5g of MgO, 1g of Er 2 o 3 Mix the powders evenly (the mass ratio of the above powders can also be adjusted between 70-90:0.05-0.15:0.05-0.15 according to the needs), the wet grinding time is 24h, dry the wet-milled powder at 100°C for 6h, dry The final powder is passed through a 200-mesh sieve for later use.
[0022] (1) At a temperature of 140°C (adjustable between 130-150°C as required), the above-mentioned doped Al 2 o 3 The powder is uniformly mixed with 100g polyethylene glycol, 80g polypropylene and 20g stearic acid to obtain a mixture;
[0023] The binding agent in the present embodiment is made up of above-mentioned polyethylene glycol, polypropylene and hard acid, and this binding agent must comprise the water-soluble organic matter of 40-60%, and the rest comprises polypropylene, polyethylene, polyoxymethylene, hard acid. One or more of fatty acid and zinc stearate, t...
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The invention discloses a method for manufacturing a two-section type ceramic metal halide lamp electric arc tube. The method for manufacturing the two-section type ceramic metal halide lamp electric arc tube comprises the following steps: (1) uniformly mixing magnesium oxide powder, alumina powder, rare earth oxide powder and a binder containing a water soluble organic matter into a mixture at the temperature of 130-150 DEG C; (2) preparing the mixture into a blank in a half electric arc tube shape by adopting a ceramic powder injection forming technology; (3) taking two blanks in the half electric arc tube shape, binding the two blanks each other under the action of vapour, and maintaining a certain pressure, so that the two blanks are connected into a whole, namely a blank overall; (4) heating the blank overall, so as to remove the organic matter in the blank overall; (5) preserving heat of the blank overall after the organic matter is removed for 1.5-2.5 hours at the temperature of 900-1100 DEG C, thus a pre-sintered electric arc tube is obtained; (6) sintering the pre-sintered electric arc tube, thus the ceramic metal halide lamp electric arc tube is obtained. By adopting the method for manufacturing the two-section type ceramic metal halide lamp electric arc tube, one pair of blanks of the half electric arc tube can be effectively connected, and a technological process is simple.
Description
technical field [0001] The invention relates to a method for manufacturing an arc tube of a two-stage ceramic metal halide lamp. Background technique [0002] Ceramic metal halide lamps have the advantages of long life, high luminous efficiency, and good color rendering. The arc tube is the core component of the ceramic metal halide lamp. The arc tube is composed of a bulb in the middle and sleeves at both ends. Two-stage ceramic arc tube manufacturing methods mainly include the following two methods: Method 1: Use isostatic pressing or powder injection molding to manufacture half of the arc tube green body, and then connect it into a complete arc tube by heating and melting the green body. Finally, the finished product is obtained by degreasing and sintering; method 2: use isostatic pressing or powder injection molding process to manufacture half arc tube green body, and then make the two half arc tubes have different shrinkage rates through process control, and finally c...
Claims
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Login to View More IPC IPC(8): C04B35/622C04B35/10H01J9/24
Inventor 喻大钊王威宋久鹏蔡协勇刘盈霞彭福生于洋
Owner XIAMEN HONGLU TUNGSTEN MOLYBDENUM IND CO LTD