JP5467272B2 - M−c−n−o系蛍光体の製造方法 - Google Patents
M−c−n−o系蛍光体の製造方法 Download PDFInfo
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/65—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing carbon
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01F—COMPOUNDS OF THE METALS BERYLLIUM, MAGNESIUM, ALUMINIUM, CALCIUM, STRONTIUM, BARIUM, RADIUM, THORIUM, OR OF THE RARE-EARTH METALS
- C01F7/00—Compounds of aluminium
- C01F7/78—Compounds containing aluminium and two or more other elements, with the exception of oxygen and hydrogen
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/65—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing carbon
- C09K11/655—Aluminates; Silicates
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- Organic Chemistry (AREA)
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- Engineering & Computer Science (AREA)
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- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Luminescent Compositions (AREA)
Description
[1] IIIB族元素(M)、炭素(C)、窒素(N)及び酸素(O)からなるM−C−N−O系蛍光体の製造方法であって、
IIIB族元素含有化合物と含窒素有機化合物を含む混合物を加熱して熱分解物を生成させる工程、
得られた熱分解物を含む生成物を解砕する工程、及び
得られた解砕物を酸素含有雰囲気下で焼成する工程
を含む製造方法。
[2] 該混合物がさらに分散剤を含有する、[1]記載のM−C−N−O系蛍光体の製造方法。
[3] IIIB族元素含有化合物と含窒素有機化合物を含む混合物を加熱する温度が150℃〜600℃の範囲内である、[1]又は[2]に記載のM−C−N−O系蛍光体の製造方法。
[4] IIIB族元素含有化合物と含窒素有機化合物を含む混合物を窒素気流下で加熱する、[1]〜[3]のいずれかに記載のM−C−N−O系蛍光体の製造方法。
[5] 焼成温度が500℃〜1000℃の範囲内である、[1]〜[4]のいずれかに記載のM−C−N−O系蛍光体の製造方法。
[6] 焼成により得られた蛍光体生成物を粉砕する工程を更に含む、[1]〜[5]のいずれかに記載のM−C−N−O系蛍光体の製造方法。
[7] 前記粉砕工程において、蛍光体生成物の平均粒径が1μm以下になるように、該蛍光体生成物を粉砕する、[8]に記載のM−C−N−O系蛍光体の製造方法。
[8] IIIB族元素(M)がホウ素(B)である、[1]〜[7]のいずれかに記載のM−C−N−O系蛍光体の製造方法。
[9] IIIB族元素(M)がアルミニウム(Al)である、[1]〜[7]のいずれかに記載のM−C−N−O系蛍光体の製造方法。
[10] IRスペクトルにおいて、1200−1250cm−1に観測されるピーク強度と1300−1400cm−1に観測されるピーク強度の比が、0.5以上2以下である、[8]に記載の方法により製造されるM−C−N−O系蛍光体。
[11] [1]〜[9]のいずれかに記載の方法により製造される、平均粒径1μm以下のM−C−N−O系蛍光体。
キシダ化学株式会社製の無水ホウ酸(B2O3)2.44g(0.035モル)、和光純薬工業株式会社製の尿素〔(NH2)2CO〕10.5g(0.175モル)、PEG(分子量20000)1.2gを乳鉢で粉砕混合し、アルミナ製のるつぼに移して加熱炉に入れ、窒素気流下、昇温速度10℃/分で400℃まで昇温し、400℃で10分間加熱処理を行った。得られた粉末を乳鉢で解砕混合し、再度るつぼに移して加熱炉に入れ、大気雰囲気下、昇温速度10℃/分で800℃まで昇温し、800℃で10分間焼成した。
キシダ化学株式会社製の無水ホウ酸(B2O3)2.44g(0.035モル)、和光純薬工業株式会社製の尿素〔(NH2)2CO〕10.5g(0.175モル)、PEG(分子量20000)1.2gを乳鉢で粉砕混合し、アルミナ製のるつぼに移して加熱炉に入れ、大気雰囲気下、昇温速度10℃/分で800℃まで昇温し、800℃で10分間焼成した。得られた蛍光体の紫外線励起発光スペクトル結果を図2に示す。蛍光量子効率は51%であった。
和光純薬工業株式会社製のホウ酸(H3BO3)1.53g(0.025モル)、尿素〔(NH2)2CO〕15.3g(0.25モル)、PEG(分子量20000)1.0gを3000mlビーカーに取り、超純水33.3gを加え、ホットスターラー(回転数500rpm)を用いて攪拌、溶解した。得られた溶液をアルミナ製のるつぼに移して加熱炉に入れ、窒素気流下、昇温速度10℃/分で400℃まで昇温し、400℃で10分間加熱処理を行った。得られた粉末を乳鉢で解砕混合し、再度るつぼに移して加熱炉に入れ、大気雰囲気下、昇温速度20℃/分で800℃まで昇温し、800℃で30分間焼成した。得られた蛍光体の紫外線励起発光スペクトルを図3に示す。蛍光量子効率は44%であった。
和光純薬工業株式会社製のホウ酸(H3BO3)1.53g(0.025モル)、尿素〔(NH2)2CO〕15.3g(0.25モル)、PEG(分子量20000)1.0gを3000mlビーカーに取り、超純水33.3gを加え、ホットスターラー(回転数500rpm)を用いて攪拌、溶解した。得られた溶液をアルミナ製のるつぼに移して加熱炉に入れ、大気雰囲気下、昇温速度20℃/分で800℃まで昇温し、800℃で30分間焼成した。得られた蛍光体の紫外線励起発光スペクトルを図4に示す。蛍光量子効率は39%であった。
キシダ化学株式会社製の無水ホウ酸(B2O3)2.44g(0.035モル)、和光純薬工業株式会社製の尿素〔(NH2)2CO〕10.5g(0.175モル)、PEG(分子量20000)1.2gを乳鉢で粉砕混合し、アルミナ製のるつぼに移して加熱炉に入れ、窒素気流下、昇温速度10℃/分で400℃まで昇温し、400℃で10分間加熱処理を行った。得られた粉末を乳鉢で粉砕混合し、再度るつぼに移して加熱炉に入れ、大気雰囲気下、昇温速度10℃/分で800℃まで昇温し、800℃で90分間焼成した。得られた蛍光体の紫外線(350nm)励起発光スペクトル結果を図5に示す。蛍光量子効率は55%であった。
キシダ化学株式会社製の無水ホウ酸(B2O3)2.44g(0.035モル)、和光純薬工業株式会社製の尿素〔(NH2)2CO〕10.5g(0.175モル)、PEG(分子量20000)2.6gを乳鉢で粉砕混合し、アルミナ製のるつぼに移して加熱炉に入れ、窒素気流下、昇温速度10℃/分で400℃まで昇温し、400℃で10分間加熱処理を行った。得られた粉末を乳鉢で解砕混合し、再度るつぼに移して加熱炉に入れ、大気雰囲気下、昇温速度10℃/分で800℃まで昇温し、800℃で20分間焼成した。得られた蛍光体の紫外線(350nm)励起発光スペクトル結果を図6に示す。蛍光量子効率は53%であった。
実施例1で得られた平均粒径3μmの蛍光体粒子を100ml容器のボールミルに入れ、30分を5回繰り返し粉砕した。堀場製作所製LA−950を用いて粉砕後の蛍光体粒子の平均粒径が0.8μmであることを確認した。紫外線(350nm)励起発光スペクトルを測定したところ、得られた発光スペクトルは、実施例1と同様の形状を示し、蛍光量子収率も実施例1の蛍光体が56%であったのに対し、55%と殆ど変化していないことを確認した。
実施例2で得られた平均粒径2.5μmの蛍光体粒子を100ml容器のボールミルに入れ、30分を5回繰り返し粉砕した。堀場製作所製LA−950を用いて粉砕後の蛍光体粒子の平均粒径が0.6μmであることを確認した。紫外線(350nm)励起発光スペクトルを測定したところ、得られた発光スペクトルは、実施例2と同様の形状を示し、蛍光量子収率も実施例2の蛍光体が44%であったのに対し、45%と殆ど変化していないことを確認した。
和光純薬工業株式会社製の硝酸アルミニウム六水和物7.92g(0.024モル)、和光純薬工業株式会社製の尿素((NH2)2CO)15.0g(0.25モル)を300mlビーカーに取り、超純水33.3gを加え、ホットスターラー(回転数500rpm)を用いて攪拌、溶解させた。この混合溶液に和光純薬工業株式会社製のPEG(分子量2万)0.5gを添加して、再度ホットスターラーを用いて回転数500rpmで攪拌した。得られた原料溶液をアルミナ製のるつぼに移して加熱炉に入れ、窒素気流下、昇温速度10℃/分で400℃まで昇温し、400℃で10分間加熱処理を行った。得られた粉末を乳鉢で解砕混合し、再度るつぼに移して加熱炉に入れ、大気雰囲気下、昇温速度10℃/分で800℃まで昇温し、800℃で90分間焼成した。得られた蛍光体の紫外線(350nm)励起発光スペクトルの測定結果を図7に示す。蛍光量子効率は42%であった。
Claims (9)
- IIIB族元素(M)、炭素(C)、窒素(N)及び酸素(O)からなるM−C−N−O系蛍光体の製造方法であって、
IIIB族元素含有化合物と、含窒素有機化合物と、炭素を含む分散剤と、を含む混合物を加熱して熱分解物を生成させる工程、
得られた熱分解物を含む生成物を平均粒径0.1μm〜2mmの範囲まで解砕する工程、及び
得られた解砕物を酸素含有雰囲気下で焼成する工程
を含む製造方法。 - 前記分散剤は、ポリエーテル類、ポリアミド類又は水酸基含有ポリマーである高分子化合物もしくは多価アルコール類である、請求項1に記載のM−C−N−O系蛍光体の製造方法。
- IIIB族元素含有化合物と含窒素有機化合物を含む混合物を加熱する温度が150℃〜600℃の範囲内である、請求項1又は2に記載のM−C−N−O系蛍光体の製造方法。
- IIIB族元素含有化合物と含窒素有機化合物を含む混合物を不活性ガス雰囲気下で加熱する、請求項1〜3のいずれか1項に記載のM−C−N−O系蛍光体の製造方法。
- 焼成温度が500℃〜1000℃の範囲内である、請求項1〜4のいずれか1項に記載のM−C−N−O系蛍光体の製造方法。
- 焼成により得られた蛍光体生成物を粉砕する工程を更に含む、請求項1〜5のいずれか1項に記載のM−C−N−O系蛍光体の製造方法。
- 前記粉砕工程において、蛍光体生成物の平均粒径が1μm以下になるように、該蛍光体生成物を粉砕する、請求項6に記載のM−C−N−O系蛍光体の製造方法。
- IIIB族元素(M)がホウ素(B)である請求項1〜7のいずれか1項に記載のM−C−N−O系蛍光体の製造方法。
- IIIB族元素(M)がアルミニウム(Al)である請求項1〜7のいずれか1項に記載のM−C−N−O系蛍光体の製造方法。
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