JPWO2005066069A1 - 微粒子の製造方法及び製造装置 - Google Patents
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Abstract
Description
In−Sn合金(Sn9.6wt%)のアトマイズ粉末(平均粒径45μm)を、アセチレン炎に導入してITO(In2O3:SnO2=90:10wt%)粉末を乾式合成し、これをバグフィルターにより乾式回収し、実施例1のITO粉末とした。
実施例1と同様にしてアセチレン炎より乾式合成したITO粉末を、スプレー水により式回収し、これを実施例2のITO粉末とした。
湿式合成された酸化インジウム粉末を1000℃で仮焼した酸化インジウム粉末90質量%と、同様に湿式合成された酸化錫を1000℃で仮焼した酸化錫粉末10質量%とを乳鉢で混合したものを比較例1とし、標準品1とした。
共沈法により湿式合成されたITO粉末を比較例2のITO粉末とした。
湿式合成された酸化インジウム粉末と酸化錫粉末との混合物(酸化錫10wt%)の粉末を用いて1550℃以上で焼結した焼結体を粉砕したものを比較例3のITO粉末とした。
各実施例1,2及び各比較例1〜3のITO粉末について、SnO2固溶量を求めた。手順は以下の通りである。なお、試験の実施に先駆けて、実施例1,2及び比較例2,3のITO粉末については、1000℃×3時間、大気中で仮焼して、微小粒子として析出しているSnO2を成長させてSnO2として検出され易いようにした。
1.まず、誘導結合高周波プラズマ分光分析(ICP分光分析)した。この結果より、In、Sn以外は全て酸素Oであるとし、そのOの量は欠損している可能性があると仮定して、InとSnとの比を求め、このIn及びSnの全てがIn2O3、SnO2になったとしたときの重量比を算出した。
2.各実施例1,2及び各比較例1〜3のITO粉末について、粉末X線回折(XRD:(株)マックサイエンス社製、MXP18II)による分析を行い、SnO2析出量を求めた。すなわち、回折結果から、間化合物(In4Sn3O12)の有無を確認し、間化合物が検出されない場合には、比較例1の標準品1として各試料のIn2O3(222)積分回折強度及びSnO2(110)積分回折強度の比からSnO2の析出量(質量%)を求めた。すなわち、SnO2の析出量(質量%)は、X線回折の積分回折強度比から求められるSnO2の含有量であり、In2O3に固溶していないSnO2が1000℃程度の仮焼により成長してX線回折のSnO2(110)のピークとなると仮定している。X線回折の結果を図2〜図6に示す。
3.1及び2の結果から、ICP分析で検出されたが、X線回折ではSnO2(110)とは検出されないSnO2を、In2O3中のSnO2固溶量とした。
In−Sn合金(Sn9.6wt%)のアトマイズ粉末(平均粒径45μm)を、DCプラズマ炎に導入してITO(In2O3:SnO2=90:10wt%)粉末を乾式合成し、これをスプレー水により湿式回収し、実施例3のITO粉末とした。
比較例1と同様に、湿式合成された酸化インジウム粉末を1000℃で仮焼した酸化インジウム粉末90質量%と、同様に湿式合成された酸化錫を1000℃で仮焼した酸化錫粉末10質量%とを乳鉢で混合したものを比較例4とし、標準品2とした。
実施例3及び各比較例4のITO粉末について、試験例1と同様にSnO2固溶量を求めた。なお、粉末X線回折(XRD)はスペクトリス((株))社製のX’PertPRO MPDを用いて分析した。これらの結果を表2に示す。また、X線回折の結果を図7及び図8に示す。
Claims (16)
- 微粒子を製造する方法において、原料を液流、液滴又は粉末として、熱源中に供給し、生成物を霧状の液状流体により微粒子として捕獲し、気液分離により前記微粒子をスラリーとして回収することを特徴とする微粒子の製造方法。
- 請求の範囲1において、原料の溶湯から液流又は液滴を形成して前記熱源中に供給することを特徴とする微粒子の製造方法。
- 請求の範囲1において、原料のアトマイズ粉末を形成して前記熱源中に供給することを特徴とする微粒子の製造方法。
- 請求の範囲1〜3の何れかにおいて、前記気液分離をサイクロンを用いて行うことを特徴とする微粒子の製造方法。
- 請求の範囲1〜4の何れかにおいて、前記熱源が、アセチレン炎又はDCプラズマ炎であることを特徴とする微粒子の製造方法。
- 請求の範囲1〜5の何れかにおいて、前記液状流体が、水であることを特徴とする微粒子の製造方法。
- 請求の範囲1〜6の何れかにおいて、前記原料が、金属、合金、酸化物、窒化物及び酸窒化物から選択される少なくとも一種であることを特徴とする微粒子の製造方法。
- 請求の範囲1〜7の何れかにおいて、前記熱源が、酸化雰囲気又は窒化雰囲気の何れかであり、酸化物、窒化物及び酸窒化物の何れかの微粒子を得ることを特徴とする微粒子の製造方法。
- 請求の範囲1〜7の何れかにおいて、前記原料が、In−Sn合金又ITO粉末であり、酸化インジウム−酸化錫粉末を製造することを特徴とする微粒子の製造方法。
- 請求の範囲9において、錫含有量がSnO2換算で2.3〜45質量%である酸化インジウム−酸化錫粉末を製造することを特徴とする微粒子の製造方法。
- 請求の範囲1〜10の何れかにおいて、前記生成物の前記液状流体により捕獲する際の最大速度が、150m/sec以下であることを特徴とする微粒子の製造方法。
- 熱源中に原料を液流、液滴又は粉末として供給することにより得られる生成物を気体流体と共に導入する導入口と、導入された生成物に対して霧状の液状流体を噴射する流体噴射手段と、液状流体で捕獲された微粒子を気液分離して前記微粒子のスラリーを得る気液分離手段と、液状流体で捕獲できなかった微粒子を含む雰囲気流体の一部を流体滴噴射位置まで戻して循環させる循環手段とを具備することを特徴とする微粒子の製造装置。
- 請求の範囲12において、前記気液分離手段の下流側にさらに、液状流体で捕獲できなかった微粒子を含む雰囲気流体の一部を導入すると共に霧状の液状流体を噴射し気液分離して前記微粒子のスラリーを得る第2の気液分離手段を具備することを特徴とする微粒子の製造装置。
- 請求の範囲13において、前記気液分離手段の下流側にさらに、液状流体で捕獲できなかった微粒子を含む雰囲気流体の一部を前記第2の気液分離手段の導入部まで戻す第2の循環手段を具備することを特徴とする微粒子の製造装置。
- 請求の範囲12〜14の何れかにおいて、前記気液分離手段がサイクロンであることを特徴とする微粒子の製造装置。
- 請求の範囲12〜15の何れかにおいて、前記流体噴射手段が噴射した液状流体に微粒子が捕獲される際の最大速度が150m/sec以下であることを特徴とする微粒子の製造装置。
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US20050195966A1 (en) * | 2004-03-03 | 2005-09-08 | Sigma Dynamics, Inc. | Method and apparatus for optimizing the results produced by a prediction model |
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US20070163385A1 (en) | 2007-07-19 |
JP4864459B2 (ja) | 2012-02-01 |
KR100907735B1 (ko) | 2009-07-14 |
WO2005066069A1 (ja) | 2005-07-21 |
TW200536776A (en) | 2005-11-16 |
KR20060109505A (ko) | 2006-10-20 |
CN100522800C (zh) | 2009-08-05 |
CN1906125A (zh) | 2007-01-31 |
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