Gettering material and preparation method thereof as well as getter
A technology of getter material and reducing agent, applied in separation methods, chemical instruments and methods, other chemical processes, etc., can solve problems such as poor adsorption
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[0043] The preparation method of the above getter material has a simple preparation process, no by-products and no pollution, and the reaction is easy to control. The obtained getter material can be used below 150 °C without high-temperature activation, and it adsorbs H 2 O, O 2 、H 2 , CO and CO 2 The gas effect is good, the cost is low, and it is suitable for maintaining the air pressure at 10 below 150°C. -2 ~10 2 Pa medium and low vacuum environment.
[0044] The invention also provides a getter. The getter in this preferred embodiment includes a desiccant material and a getter material. Specifically, the drying material is selected from at least one of alkali metal oxides and alkaline earth metal oxides. The dry material can absorb a large amount of H 2 O and CO 2 , so as to better maintain the vacuum environment.
[0045] Preferably, the mass ratio of the dry material to the getter material is 400-10:1. More preferably, the mass ratio of the dry material to the...
Embodiment 1
[0050] 90 grams of cerium oxide and 10 grams of copper oxide were stirred and mixed, and then 0.5 grams of calcium particles were added and mixed, and the mixture was put into a muffle furnace, and calcined at 900° C. for 1 hour with argon for reduction reaction to obtain a reduced mixture. The reduction mixture and 1 g of palladium oxide were mechanically ball milled for 2 h to obtain a getter material. Calcium oxide and getter materials are formulated into a getter according to a mass ratio of 100:1 to make a getter package, and put into a vacuum insulation panel for aging test.
Embodiment 2
[0052] 60 grams of cerium oxide and 40 grams of copper oxide were ball-milled for 2 hours, and then 0.7 grams of magnesium powder was added and mixed evenly. The mixture was put into an intermediate frequency induction furnace, and calcined at 1000° C. for 1 hour with argon gas for reduction reaction to obtain a reduction mixture. The reduction mixture was mechanically ball-milled with 4 g of palladium oxide and 1 g of silver oxide for 2 h to obtain a getter material. Lithium oxide and getter material are formulated into a getter according to a mass ratio of 50:1 to make a getter bag, which is put into a vacuum insulation panel for aging test. The total mass of the getter package is the same as in Example 1, and the test conditions such as the vacuum degree of the vacuum insulation panel are the same as in Example 1.
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