Preparation method of In2O3/SnO2 gas sensitive material with porous structure
A technology of gas-sensing materials and multi-channels, which is applied in the field of preparation of In2O3/SnO2 multi-channel structure gas-sensing materials, can solve the problems of difficult detection of gas types and difficult materials, and achieve improved gas sensitivity, simple raw material preparation, and clean production Effect
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Embodiment 1
[0016] Will be commercially available In 2 o 3 and SnO 2 powder into the steel mold (In 2 o 3 :SnO 2 =4:1), according to the conditions of pressing pressure of 90MPa and holding pressure for 3 minutes, the green body was pressed into a green body, and then the green body was put into a sintering furnace for in-situ sintering growth. ℃, heat preservation for 1 hour, then raise the temperature to 1300 degree Celsius, heat preservation for 5 hours, and finally cool down with the furnace. The oxygen flow rate was maintained at 8 L / min during the temperature rise.
Embodiment 2
[0018] Will be commercially available In 2 o 3 and SnO 2 powder into the steel mold (In 2 o 3 :SnO 2 =7:3), according to the conditions of pressing pressure of 65MPa and holding pressure for 2 minutes, the green body was pressed into a green body, and then the green body was put into a sintering furnace for in-situ sintering growth. ℃, keep warm for 2 hours, then raise the temperature to 1450 ℃, keep warm for 2 hours, preferably cool with the furnace. The oxygen flow rate was maintained at 5 L / min during the heating process.
Embodiment 3
[0020] Will be commercially available In 2 o 3 and SnO 2 powder into the steel mold (In 2 o 3 :SnO 2 =3:2), according to the conditions of pressing pressure of 80MPa and holding pressure for 5 minutes, the green body was pressed into a green body, and then the green body was put into a sintering furnace for in-situ sintering growth. ℃, keep warm for 1h, then raise the temperature to 1250°C, keep warm for 3h, preferably cool with the furnace. The oxygen flow rate was maintained at 3 L / min during the temperature rise.
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