JP2007112707A - 高純度で易流動性を有する金属酸化物粉末の製造方法 - Google Patents
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Abstract
【解決手段】本発明の側面によれば、イットリア及びアルミナ粉末のような金属酸化物粉末(供給材料)は、プラズマ装置を用いて処理される。その処理は、通常、プラズマ装置を用いた供給材料の空中での加熱と溶融とからなる。そのプラズマ装置は、所定の電極供給機と冷却システムとを有するプラズマトーチ、粉末供給機、粉末を収集するチャンバー、及び、除塵システムを備える。加熱された粉末は、自由落下状態で急速に冷却される、溶融された球形の小滴を形成する。プラズマ高密度化処理は、いくつかの不純物である酸化物を除去し、粒子の形態を変化させ、粉末の見掛け密度を向上させる。
【選択図】図1
Description
110 プラズマシステム
112 プラズマプルーム
120 粉末供給機
122 粉末材料
130 粉末収集器
132 生成物
134 微粒子
140 除塵システム
Claims (15)
- 粉末供給材料をプラズマ流に注入する段階と、
前記プラズマ流によって前記粉末供給材料を溶融し、溶融された小滴を形成する段階と、
前記溶融された小滴を自由落下状態で冷却し、凝固された球形の小滴を形成する段階と、を含み、
前記凝固された球形の小滴は、前記粉末供給材料より高い密度レベルと純度レベルとを有する、金属酸化物粉末の製造方法。 - 所定の粒径を超える前記凝固された球形の小滴を収集する収集段階をさらに含む、請求項1に記載の方法。
- 前記収集段階は、前記所定の粒径未満の前記凝固された球形の小滴を分離することをさらに含む、請求項2に記載の方法。
- 前記所定の粒径未満の前記凝固された球形の小滴は、除塵フィルタ内に回収される、請求項3に記載の方法。
- 前記収集された凝固された球形の小滴の粒径は、約5μmから150μmである、請求項2に記載の方法。
- 前記自由落下状態の継続時間は、前記溶融された小滴の空中での凝固を可能にするために、前記処理された粉末の粒径と見掛け密度に依存して変更される、請求項1に記載の方法。
- 前記粉末供給材料は、その前の高密度化処理から得られた凝固された球形の小滴である、請求項1に記載の方法。
- 前記凝固された小滴は、99重量%より高い純度と、約1.5g/ccより高い見掛け密度と、約60s/50gより低い流動性とを有する、請求項1に記載の方法。
- 前記粉末供給材料は、火炎熱分解、凝集、融合粉砕、凝集沈殿、または、他の化学処理を用いて製造された金属酸化物粉末である、請求項1に記載の方法。
- 粉末供給材料をプラズマ流に注入する段階と、
前記プラズマ流によって前記粉末供給材料を溶融し、溶融された小滴を形成する段階と、
前記溶融された小滴を自由落下状態で冷却し、凝固された球形の小滴を形成する段階と、によって形成された高純度易流動性粉末。 - 前記凝固された球形の小滴は、前記粉末供給材料より高い純度レベルを有する、請求項10に記載の粉末。
- 前記凝固された球形の小滴は、前記粉末供給材料の粉末流動性より改善された粉末流動性を有する、請求項10に記載の粉末。
- 前記凝固された球形の小滴は、前記粉末供給材料の粉末孔より減少された粉末孔を有する、請求項10に記載の粉末。
- 前記凝固された球形の小滴の粉末の総合密度は、前記粉末供給材料の密度より大きい、請求項10に記載の粉末。
- 前記凝固された球形の小滴の純度は、99%より高く、前記凝固された小滴の密度は、約1.0g/ccより高く、前記凝固された球形の小滴の流動性は、60s/50g未満である、請求項10に記載の粉末。
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KR20180061385A (ko) * | 2016-09-08 | 2018-06-07 | (주)세원하드페이싱 | 고유동성 용사 분말 및 이의 제조 방법 |
JP2019512611A (ja) * | 2016-09-08 | 2019-05-16 | セウォン ハードフェイシング カンパニー リミテッドSewon Hard Facing Co.,Ltd. | 高流動性溶射粉末及びその製造方法 |
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JP2021513001A (ja) * | 2018-01-31 | 2021-05-20 | サン−ゴバン サントル ド レシェルシュ エ デテュド ユーロペアン | エッチングチャンバーをコーティングする為の粉末 |
KR20190113259A (ko) * | 2018-03-28 | 2019-10-08 | (주)세원하드페이싱 | 유동성 향상을 위한 마이크로파 플라즈마를 이용한 세라믹 분말의 표면 처리 방법 |
KR102085420B1 (ko) | 2018-03-28 | 2020-03-05 | (주)세원하드페이싱 | 유동성 향상을 위한 마이크로파 플라즈마를 이용한 세라믹 분말의 표면 처리 방법 |
WO2022138410A1 (ja) * | 2020-12-22 | 2022-06-30 | 信越化学工業株式会社 | 希土類酸化物溶射材料及びその製造方法、並びに希土類酸化物溶射膜及びその形成方法 |
JP2022098519A (ja) * | 2020-12-22 | 2022-07-04 | 信越化学工業株式会社 | 希土類酸化物溶射材料及びその製造方法、並びに希土類酸化物溶射膜及びその形成方法 |
JP7359136B2 (ja) | 2020-12-22 | 2023-10-11 | 信越化学工業株式会社 | 粒子状溶射材料及び希土類酸化物溶射材料の製造方法、並びに希土類酸化物溶射膜及びその形成方法 |
Also Published As
Publication number | Publication date |
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EP1777302B1 (en) | 2009-07-15 |
DE602006007780D1 (de) | 2009-08-27 |
US7931836B2 (en) | 2011-04-26 |
CA2563892C (en) | 2016-02-16 |
US20110129399A1 (en) | 2011-06-02 |
US8518358B2 (en) | 2013-08-27 |
US20070110655A1 (en) | 2007-05-17 |
CA2563892A1 (en) | 2007-04-21 |
ES2328395T3 (es) | 2009-11-12 |
CN1951861B (zh) | 2012-06-27 |
EP1777302A1 (en) | 2007-04-25 |
JP5328092B2 (ja) | 2013-10-30 |
CN1951861A (zh) | 2007-04-25 |
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