Daily Archives: May 24, 2016

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May 24, 2016

The invention relates to such as high-pressure sodium lamps, metal halide lamps, Super Sapphire tubes for gas discharge lamps such as high-pressure mercury lamp.

To date, the high pressure sodium lamp and metal halide lamp, high pressure mercury vapor lamps used in gas discharge lamps, such as Sapphire tube, are made of a single alumina. UV light transmission due to alumina, will cause harm to the human body. In addition, after metal substances such as sodium alumina, attenuation of light larger, life short.
Object of the present invention is to provide an impervious to UV light, harmless to human body and long service life of Sapphire tubes for gas discharge lamps.
Sapphire tube for gas discharge lamps of the invention is made of the following components (weight): alumina (Al2O3) 90~110; magnesium oxide (MgO) 0.05~0.6; cerium oxide (CeO2) 0.05~0.5; titanium oxide (TiO2) 0.05~0.5.

Sapphire tubes for the preparation of the invention of the gas discharge lamp the optimization weight distribution range is: alumina (Al2O3) 90~105; magnesium oxide (MgO) 0.1~0.4; cerium oxide (CeO2) 0.05~0.3; titanium oxide (TiO2) 0.05~0.2.
Preparation of Sapphire for the invention of the gas discharge lamp tube is the best weight ratio: alumina (Al2O3) 95 copies of magnesium oxide (MgO) 0.2; cerium oxide (CeO2) 0.2; titanium oxide (TiO2) 0.1.
Preparation gas put electric with Sapphire tube of method is: first with to ion water and industrial alcohol on Crystal furnace for cleaning; zhihou, will alumina (Al2O3), and magnesium oxide (MgO), and oxidation CE (CeO2) and oxidation titanium (TiO2) reset into has several crystal device of Mo Crucible within; again zhihou, will with raw materials of Mo Crucible reset into Crystal furnace within, while loaded good seed crystal, and on good introduction Crystal Shi of contact location; closed door, On its pumping vacuum to 1~0.1Pa Hou, filling into argon gas to atmospheric; then, on MO crucible for heating, makes therein of raw materials melting and appeared liquid streamlines; at, declined seed crystal axis, makes seed crystal close crystal device above, and on its for baking 3-5 minutes, adjustment introduction Crystal temperature makes seed crystal end Department is like melt non-melt Shi, again will seed crystal contact Crystal table; stay seed crystal and Crystal table Shang melting has of raw materials full melt received Hou, makes crystal table temperature fell to Crystal temperature (2053 ± 10 ℃); last, in Crystal temperature Xia , Drop shoulders, straight up to the Crystal pulling up; after treating the Crystal and Crystal table from the gradually cooling down, to one hour stop after heating, let them cool to room temperature, remove the single crystal Sapphire tube is the invention of Sapphire tubes for gas discharge lamps.
Due to business cost invention of gas put electric with Sapphire tube of above group copies in the contains oxidation CE (CeO2) and oxidation titanium (TiO2) can will UV absorption and conversion into visible, not only increases has gas put electric of brightness, also not on human caused hurt; and due to business cost invention of gas put electric with Sapphire tube of group copies in the contains magnesium oxide (MgO), can anti-sodium, and SC, metal material of corrosion, light failure small, greatly to improve has gas put electric of using life.
Following is the embodiment of the invention according to weigh the ratio of raw materials: alumina 950 grams 2 grams of magnesium oxide; 2 grams of cerium oxide; 1 gram of titanium oxide. Among them, the alumina is 99.95%.
Will above raw materials business cost invention of gas put electric with Sapphire tube of method is: 1. first with to ion water and industrial alcohol wipe NET Crystal furnace furnace; 2. will alumina (Al2O3), and magnesium oxide (MgO), and oxidation CE (CeO2) and oxidation titanium (TiO2) reset into has 10 a crystal device of Mo Crucible within; 3. will with raw materials of Mo Crucible reset into Crystal furnace within. While packed seeds and good Crystal contact position. Then, close the door, after vacuuming it with a vacuum pump to the 1~0.1Pa, filled with argon gas to atmospheric pressure (atmospheric); 4. heating of the molybdenum Crucible, to (2,100 Celsius) makes the raw material melting and liquid line appears; at this point, slowly declining seed crystal axis, seeds close to the mold over and bake for 4 minutes. Adjust the temperature to seed when end is like melt non-melt, will seed contact table, seeding and crystallization of molten material after welding fully on the table, crystalline surface temperature drops to the crystallization temperature (2053 ± 10 degrees c); 5. crystallization temperature, drop shoulders, straight up to Crystal resistant finish. After treating the Crystal and Crystal table from the gradually cooling down, stop heating after one hour, let them cool to room temperature, open the single crystal furnace, remove the single crystal Sapphire tube, is the invention of Sapphire tubes for gas discharge lamps.

Source: http://www.ch-microtek.com/