Getter material, method for manufacturing getter material, method for manufacturing getter-material-containing composition, and method for manufacturing glass panel unit
A method for manufacturing a glass panel unit, which reduces the amount of a getter material to enable a gettering ability to be realized at a relatively low temperature less likely to cause damage. The method includes a step of producing a getter material by heating an unprocessed getter material at a temperature higher than a prescribed temperature Te; a step of producing a preassembled component including a first and second glass pane, a heat-fusible sealing material, an internal space, and a gas adsorbent containing the getter material, and an evacuation port; a step of forming a frame body hermetically bonding the first glass pane and the second glass pane together by melting the heat-fusible sealing material with heat; and a step of heating the gas adsorbent at the prescribed temperature Te while the internal space is evacuated by exhausting air in the internal space through the evacuation port.
1. A method for manufacturing glass panel unit, the method comprising:
a step of producing a getter material including
a step of preparing an unprocessed getter material in which a retention component is held by a getter material body, the retention component being oxygen,
a step of generating the getter material body by heating the unprocessed getter material at a first temperature to vaporize and desorb the retention component from the getter material body,
a step of producing the getter material by causing an adsorption component to be adsorbed on the getter material body, the getter material including the getter material body and the adsorption component adsorbed on the getter material body,
the adsorption component being at least one component selected from the group consisting of nitrogen, hydrogen, carbon dioxide, water, neon, xenon, carbon hydride, and carbon hydride derivative;
a step of producing a preassembled component including
a first glass pane,
a second glass pane facing the first glass pane,
a heat-fusible sealing material disposed between the first glass pane and the second glass pane, being in contact with the first glass pane and the second glass pane, and having a frame shape,
an internal space surrounded by the first glass pane, the second glass pane, and the heat-fusible sealing material having the frame shape,
a gas adsorbent containing the getter material and disposed in the internal space, and
an evacuation port connecting the internal space to an outside space;
a step of forming a frame body by melting the heat-fusible sealing material with heat and then hardening the heat-fusible sealing material to form the frame body, wherein the frame body hermetically bonds the first glass pane and the second glass pane together; and
a step of heating the gas adsorbent at a second temperature lower than the first temperature while the internal space is evacuated by exhausting air in the internal space through the evacuation port.
2. The method of claim 1 , wherein
the preassembled component further includes
a partition dividing the internal space into a first space and a second space having the evacuation port; and
an air passage connecting the first space to the second space, and
the method further includes a step of, after the gas adsorbent is heated, deforming the partition at a temperature higher than the second temperature to form a partition wall closing the air passage while the internal space is evacuated by exhausting the air through the evacuation port, and defining the first space and the second space by the partition wall.
3. The method of claim 1 , wherein
the unprocessed getter material is heated in an atmosphere of an inert gas containing at least one component selected from the group consisting of neon, xenon, and argon or in an evacuated state.