JP2021523089A - アルミニウムと酸素の燃焼合成と水アトマイズ法によるアルミナベース固溶体セラミック粉末の製造方法 - Google Patents
アルミニウムと酸素の燃焼合成と水アトマイズ法によるアルミナベース固溶体セラミック粉末の製造方法 Download PDFInfo
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Abstract
【解決手段】本発明の製造方法は、原料を乾燥させ、均一に混合し、混合物を高圧反応器に入れ、酸素含有雰囲気で点火し、高温燃焼によって合成反応を行い、高温溶融物を形成した後1s〜60s保温してから、次にノズルを開けて高温溶融物をノズルから噴出させ、液相を急速冷却することで、アルミナベース固溶体セラミック粉末を得る。
【選択図】 図3
Description
(1)共沈法
(2)水熱法
(3)ゾル‐ゲル法
図2は高圧反応器中のノズルホルダの構造概略図である。
図3は実施例1で製造されるアルミナベース固溶体セラミック粉末の形状である。
図4は実施例1で得られるアルミナベース固溶体セラミックの断面組織のミクロ構造である。
前記押え板4は円板形ラック部材6−1の上面に設置され、押え板4は第1段差円孔とねじで接続され、押え板4の中心には押え板貫通孔が開設される。
O2ガスだけを導入する場合、アルミニウムと酸素の燃焼合成の反応式は以下のとおりである。
4Al+3O2→2Al2O3
4Al+3O2→2Al2O3
8Al+3N2+6ZrO2→4Al2O3+6ZrN
実施形態2
実施形態3
実施形態4
本実施形態と実施形態1から3の相違点は以下のとおりである。前記酸素含有雰囲気は酸素、酸素と空気の混合ガス又は酸素と窒素の混合ガスである。
酸素含有雰囲気が酸素である場合、酸素の気圧は5MPa〜50MPaである。
その他は実施形態1から3と同様である。
O2ガスだけを導入する場合、アルミニウムと酸素の燃焼合成の反応式は以下のとおりである。
4Al+3O2→2Al2O3
O2/N2混合ガスを導入する場合、アルミニウムと酸素の燃焼合成の方程式は以下のとおりである(最終生成物をAl2O3/ZrO2として例とする):
4Al+3O2→2Al2O3
8Al+3N2+6ZrO2→4Al2O3+6ZrN
実施形態5
その他は発明を実施形態4と同様である。
実施形態6
実施形態7
実施例1
実施例2
実施例3
実施例4
実施例5
実施例6
実施例7
実施例8
実施例9
実施例10
実施例11
アルミニウムと酸素の燃焼合成と水アトマイズ法によるアルミナベース固溶体セラミック粉末の製造方法であって、具体的には以下の工程によって完成する。
実施例12
アルミニウムと酸素の燃焼合成と水アトマイズ法によるアルミナベース固溶体セラミック粉末の製造方法であって、具体的には以下の工程によって完成する。
実施例13
アルミニウムと酸素の燃焼合成と水アトマイズ法によるアルミナベース固溶体セラミック粉末の製造方法であって、具体的には以下の工程によって完成する。
Claims (5)
- 原料を乾燥させ、均一に混合し、混合物を高圧反応器に入れ、酸素含有雰囲気で点火し、高温燃焼によって合成反応を行い、高温溶融物を形成した後1s〜60s保温し、次にノズルを開け、高温溶融物をノズルから噴出させ、液相を急速冷却することで、アルミナベース固溶体セラミック粉末を得るという工程を含み、
前記原料はアルミニウム粉末及び希釈剤であり、混合物におけるアルミニウム粉末の質量割合は10%〜40%であり、希釈剤の質量割合は60%〜90%である、ことを特徴とするアルミニウムと酸素の燃焼合成と水アトマイズ法によるアルミナベース固溶体セラミック粉末の製造方法。 - 前記希釈剤が酸化アルミニウム、ジルコニア、酸化マグネシウム、酸化カルシウム、酸化ストロンチウム、酸化スカンジウム、酸化鉄、酸化モリブデン、酸化バリウム、酸化バナジウム、酸化チタン、酸化クロム、酸化コバルト、酸化ニッケル、酸化イットリウム、酸化ニオブ、酸化ハフニウム、酸化タンタル、酸化ランタン、酸化セリウム、酸化プラセオジム、酸化ネオジム、酸化サマリウム、酸化ユーロピウム、酸化ガドリニウム、酸化テルビウム、酸化ジスプロシウム、酸化ホルミウム、酸化エルビウム、酸化ツリウム、酸化イッテルビウム、酸化ケイ素及び酸化ルテチウムのうちの一つ又は複数である、ことを特徴とする請求項1に記載のアルミニウムと酸素の燃焼合成と水アトマイズ法によるアルミナベース固溶体セラミック粉末の製造方法。
- 前記アルミニウムと酸素の燃焼合成物にジルコニアが含まれる場合、酸化イットリウムとジルコニアのモル比は(0〜20):100であり、酸化セリウムとジルコニアのモル比は(0〜30):100であり、酸化マグネシウムとジルコニアのモル比は(0〜28):100であり、酸化カルシウムとジルコニアのモル比は(0〜33.45):100であり、酸化チタンとジルコニアのモル比は(0〜44.41):100であり、酸化スカンジウムとジルコニアのモル比は(0〜20):100である、ことを特徴とする請求項2に記載のアルミニウムと酸素の燃焼合成と水アトマイズ法によるアルミナベース固溶体セラミック粉末の製造方法。
- 前記酸素含有雰囲気は酸素、酸素と空気の混合ガス又は酸素と窒素の混合ガスを含み、
酸素含有雰囲気が酸素である場合、酸素の気圧は5MPa〜50MPaであり、
酸素含有雰囲気が酸素と空気の混合ガスである場合、酸素含有雰囲気における酸素の気圧は5MPa〜50MPaであり、空気の気圧は0MPa〜20MPaであり、
酸素含有雰囲気が酸素と窒素の混合ガスである場合、酸素含有雰囲気における酸素の気圧は5MPa〜50MPaであり、窒素の気圧は0MPa〜20MPaである、ことを特徴とする請求項3に記載のアルミニウムと酸素の燃焼合成と水アトマイズ法によるアルミナベース固溶体セラミック粉末の製造方法。 - 混合物を高圧反応器に入れ、まず混合物を25〜300℃まで加熱し、さらに酸素含有雰囲気で点火し、高温燃焼により合成反応を行う、ことを特徴とする請求項4に記載のアルミニウムと酸素の燃焼合成と水アトマイズ法によるアルミナベース固溶体セラミック粉末の製造方法。
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