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Method for prolonging service life of graphite crucible for vanadium-nitrogen alloy
The invention discloses a method for prolonging the service life of a graphite crucible for vanadium-nitrogen alloy. The method comprises the following steps: (1) mixing monocrystalline silicon powder, silicon carbide powder and a binder to prepare slurry; (2) polishing the surface of the graphite crucible by using abrasive paper; (3) brushing the slurry on the surface of the graphite crucible, and performing normal-temperature drying, high-temperature baking and atmosphere firing on the brushed graphite crucible to form a slurry layer; and (4) repeating the step (3) for 3-5 times to prepare the protective coating of the graphite crucible. Monocrystalline silicon powder, silicon carbide powder and an adhesive are mixed to prepare slurry, the slurry is applied to the outer surface of the graphite crucible, a high-density protective coating is formed on the surface of the graphite crucible after drying, baking and firing, and gas causing pulverization of the graphite crucible in the vanadium-nitrogen alloy preparation process is isolated through the protective coating; the service life of the graphite crucible is prolonged, the consumption rate of the graphite crucible is reduced, and the production cost is reduced.
本发明公开了一种提高钒氮合金用石墨坩埚使用寿命的方法，包括：(1)将单晶硅粉、碳化硅粉以及粘结剂混合制成浆料；(2)用砂纸对石墨坩埚表面进行打磨；(3)将浆料涂刷于石墨坩埚表面，对涂刷后的石墨坩埚进行常温干燥、高温烘烤以及气氛烧制以形成浆料层；(4)对步骤(3)重复3～5次以制得石墨坩埚的保护涂层。本发明通过将单晶硅粉、碳化硅粉和粘接剂混合制成浆料涂覆于石墨坩埚外表面，经干燥、烘烤、烧制后在石墨坩埚表面形成高致密度的保护涂层，通过该保护涂层隔绝在钒氮合金制备过程中导致石墨坩埚粉化的气体，提升石墨坩埚的使用寿命，减缓石墨坩埚消耗速率，降低生产成本。
Method for prolonging service life of graphite crucible for vanadium-nitrogen alloy
The invention discloses a method for prolonging the service life of a graphite crucible for vanadium-nitrogen alloy. The method comprises the following steps: (1) mixing monocrystalline silicon powder, silicon carbide powder and a binder to prepare slurry; (2) polishing the surface of the graphite crucible by using abrasive paper; (3) brushing the slurry on the surface of the graphite crucible, and performing normal-temperature drying, high-temperature baking and atmosphere firing on the brushed graphite crucible to form a slurry layer; and (4) repeating the step (3) for 3-5 times to prepare the protective coating of the graphite crucible. Monocrystalline silicon powder, silicon carbide powder and an adhesive are mixed to prepare slurry, the slurry is applied to the outer surface of the graphite crucible, a high-density protective coating is formed on the surface of the graphite crucible after drying, baking and firing, and gas causing pulverization of the graphite crucible in the vanadium-nitrogen alloy preparation process is isolated through the protective coating; the service life of the graphite crucible is prolonged, the consumption rate of the graphite crucible is reduced, and the production cost is reduced.
本发明公开了一种提高钒氮合金用石墨坩埚使用寿命的方法，包括：(1)将单晶硅粉、碳化硅粉以及粘结剂混合制成浆料；(2)用砂纸对石墨坩埚表面进行打磨；(3)将浆料涂刷于石墨坩埚表面，对涂刷后的石墨坩埚进行常温干燥、高温烘烤以及气氛烧制以形成浆料层；(4)对步骤(3)重复3～5次以制得石墨坩埚的保护涂层。本发明通过将单晶硅粉、碳化硅粉和粘接剂混合制成浆料涂覆于石墨坩埚外表面，经干燥、烘烤、烧制后在石墨坩埚表面形成高致密度的保护涂层，通过该保护涂层隔绝在钒氮合金制备过程中导致石墨坩埚粉化的气体，提升石墨坩埚的使用寿命，减缓石墨坩埚消耗速率，降低生产成本。
Method for prolonging service life of graphite crucible for vanadium-nitrogen alloy
一种提高钒氮合金用石墨坩埚使用寿命的方法
TU ZHONGBING (author) / SHI QIHUA (author) / GAO LEIZHANG (author) / YIN DANFENG (author)
2022-12-09
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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