JP5234781B2 - 蛍光体とその製造方法および発光器具 - Google Patents
蛍光体とその製造方法および発光器具 Download PDFInfo
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- JP5234781B2 JP5234781B2 JP2008502746A JP2008502746A JP5234781B2 JP 5234781 B2 JP5234781 B2 JP 5234781B2 JP 2008502746 A JP2008502746 A JP 2008502746A JP 2008502746 A JP2008502746 A JP 2008502746A JP 5234781 B2 JP5234781 B2 JP 5234781B2
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- IRPGOXJVTQTAAN-UHFFFAOYSA-N 2,2,3,3,3-pentafluoropropanal Chemical compound FC(F)(F)C(F)(F)C=O IRPGOXJVTQTAAN-UHFFFAOYSA-N 0.000 description 1
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- 229910052596 spinel Inorganic materials 0.000 description 1
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- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
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Description
0.00001≦ a ≦0.1・・・・・・・・・・(i)
0≦ b ≦0.40・・・・・・・・・・・・・・・・(ii)
0.10≦ c ≦0.48・・・・・・・・・・・・(iii)
0.25≦ d ≦0.60・・・・・・・・・・・・(iv)
0.02≦ e ≦0.35・・・・・・・・・・・・(v)
以上の条件を満たし、励起源を照射することにより波長300nmから700nmの範囲の波長にピークを持つ蛍光を発光することを特徴とする蛍光体。
0.25≦ c ≦0.48・・・・・・・・・・・・(vi)
0.45≦ d ≦0.60・・・・・・・・・・・・(vii)
0.02≦ e ≦0.20・・・・・・・・・・・・(viii)
の条件を満たすことを特徴とする上記(1)に記載の蛍光体。
2 LEDチップ
3、4 導電性端子
5 ワイヤーボンド
6 樹脂層
7 容器
8 赤色蛍光体
9 緑色蛍光体
10 青色蛍光体
11、12、13 紫外線発光セル
14、15、16、17 電極
18、19 誘電体層
20 保護層
21、22 ガラス基板
51 ガラス
52 陰極
53 陽極
54 ゲート
55 エミッタ
56 蛍光体
57 電子
0.00001≦ a ≦0.1・・・・・・・・・・(i)
0≦ b ≦0.40・・・・・・・・・・・・・・・・(ii)
0.10≦ c ≦0.48・・・・・・・・・・・・(iii)
0.25≦ d ≦0.60・・・・・・・・・・・・(iv)
0.02≦ e ≦0.35・・・・・・・・・・・・(v)
原料粉末は、比表面積3.3m2/g、酸素含有量0.79%の窒化アルミニウム粉末(トクヤマ製Fグレード)、比表面積13.6m2/g、純度99.99%の酸化アルミニウム粉末(大明化学製タイミクロングレード)、純度99.9%の炭酸マンガン粉末(高純度化学製試薬級)、および純度99.9%の酸化ユーロピウム粉末および酸化セリウム粉末(信越化学製)を用いた。
原料粉末は、実施例1〜43と同じもの、および、平均粒径0.5μm、酸素含有量0.93重量%、α型含有量92%の窒化ケイ素粉末(宇部興産製E10グレード)、純度99.9%の炭酸カルシウム粉末(高純度化学製試薬級)、および酸化マグネシウム粉末(神島化学製)を用いた。実施例44〜46の設計組成も表1にまとめる。
Claims (19)
- 組成式MaAbAlcOdNe(ただし、Mは、Mn、Ce、Euから選ばれる少なくとも1種以上であり、Aは、Si、Mg、Caから選ばれる少なくとも1種以上であり、式中a+b+c+d+e=1とする)で示される無機結晶であって、AlON結晶、またはAlON固溶体結晶であるか、あるいはAlONと同一の結晶構造を持ち、金属元素Mが固溶してなる無機結晶を含む蛍光体であって、パラメータa、b、c、d、eは、
0.00001≦ a ≦0.1・・・・・・・・・・(i)
0≦ b ≦0.40・・・・・・・・・・・・・・・(ii)
0.10≦ c ≦0.48・・・・・・・・・・・・(iii)
0.25≦ d ≦0.60・・・・・・・・・・・・(iv)
0.02≦ e ≦0.35・・・・・・・・・・・・・(v)
以上の条件を満たし、励起源を照射することにより波長300nmから700nmの範囲の波長にピークを持つ蛍光を発光することを特徴とする蛍光体。 - A元素を含まない、すなわちb値が0であり、パラメータc、d、eが、
0.25≦ c ≦0.48・・・・・・・・・・・・(vi)
0.45≦ d ≦0.60・・・・・・・・・・・・(vii)
0.02≦ e ≦0.20・・・・・・・・・・・・(viii)
の条件を満たすことを特徴とする請求項1に記載の蛍光体。 - 前記無機結晶は、AlON結晶、またはAlON固溶体結晶であり、金属イオンを構成する金属元素Mが固溶した請求項1に記載の蛍光体。
- 前記励起源が100nm以上500nm以下の波長を持つ紫外線または可視光、電子線、X線のいずれかであることを特徴とする請求項1に記載の蛍光体。
- 金属イオンを構成する金属元素Mとして少なくともEuを含有し、励起源を照射することにより波長350nmから450nmの範囲の波長にピークを持つ蛍光を発光することを特徴とする請求項1に記載の蛍光体。
- 230nmから350nmの範囲の波長に励起スペクトルのピークを持つことを特徴とする請求項5に記載の蛍光体。
- 金属イオンを構成する金属元素Mとして少なくともCeを含有し、励起源を照射することにより波長350nmから450nmの範囲の波長にピークを持つ蛍光を発光することを特徴とする請求項1に記載の蛍光体。
- 230nmから350nmの範囲の波長に励起スペクトルのピークを持つことを特徴とする請求項7に記載の蛍光体。
- 金属イオンを構成する金属元素Mとして少なくともMnを含有し、励起源を照射することにより波長470nmから570nmの範囲の波長にピークを持つ蛍光を発光することを特徴とする請求項1に記載の蛍光体。
- 230nmから450nmの範囲の波長に励起スペクトルのピークを持つことを特徴とする請求項9に記載の蛍光体。
- 金属イオンを構成する金属元素Mとして少なくともCeとMnを含有し、励起源を照射することにより波長470nmから570nmの範囲の波長にピークを持つ蛍光を発光することを特徴とする請求項1に記載の蛍光体。
- 150nmから350nmの範囲の波長に励起スペクトルのピークを持つことを特徴とする請求項11に記載の蛍光体。
- 元素Mの金属、酸化物、炭酸塩、窒化物、フッ化物、塩化物、酸窒化物またはそれらの組合せ(ただし、Mは、Mn、Ce、Euから選ばれる1種または2種以上の元素)と、元素Aの金属、酸化物、炭酸塩、窒化物、フッ化物、塩化物、酸窒化物またはそれらの組合せ(ただし、Aは、Si、Mg、Caから選ばれる1種または2種以上の元素)と、窒化アルミニウムと、酸化アルミニウムとを少なくとも含む原料混合物を、相対嵩密度40%以下の充填率に保持した状態で容器に充填した後に、0.1MPa以上100MPa以下の窒素雰囲気中において、1500℃以上2200℃以下の温度範囲で焼成することを特徴とする請求項1に記載の蛍光体の製造方法。
- 330〜470nmの波長の光を発する発光光源と蛍光体から構成される照明器具において、前記蛍光体は、請求項1に記載の蛍光体を含むことを特徴とする照明器具。
- 前記発光光源はLEDまたはLDを含み、
前記蛍光体は、330〜420nmの励起光により550nm〜600nmの波長に発光ピークを持つ黄色蛍光体をさらに含むことを特徴とする請求項14に記載の照明器具。 - 前記発光光源はLEDまたはLDを含み、
前記蛍光体は、330〜420nmの励起光により600nm〜700nmの波長に発光ピークを持つ赤色蛍光体をさらに含むことを特徴とする請求項15に記載の照明器具。 - 前記発光光源はLEDまたはLDを含み、
前記蛍光体は、330〜420nmの励起光により450nm〜500nmの波長に発光ピークを持つ青色蛍光体をさらに含むことを特徴とする請求項16に記載の照明器具。 - 励起源と蛍光体を含む画像表示装置であって、前記蛍光体は請求項1に記載の蛍光体を含むことを特徴とする画像表示装置。
- 蛍光表示管(VFD)、フィールドエミッションディスプレイ(FEDまたはSED)、または陰極線管(CRT)のいずれかを含み、
前記励起源が加速電圧10V以上30kV以下の電子線であることを特徴とする請求項18に記載の画像表示装置。
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