JP2008255356A - Ba−Sr−Ca含有化合物およびこれを含む白色発光素子 - Google Patents
Ba−Sr−Ca含有化合物およびこれを含む白色発光素子 Download PDFInfo
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Abstract
【解決手段】Ba酸化物と、Sr酸化物と、Ca酸化物と、Eu酸化物、Mn酸化物、Sm酸化物、Sn酸化物、Sb酸化物、Ce酸化物、Pr酸化物、Nd酸化物、Gd酸化物、Tb酸化物、Dy酸化物、Ho酸化物、Er酸化物、Tm酸化物、Yb酸化物、およびBi酸化物からなる群から選択される少なくとも1種の金属酸化物と、Mg酸化物と、Si酸化物またはGe酸化物と、を含む混合物を出発物質として、還元雰囲気下で熱処理して得られうるBa−Sr−Ca含有化合物であって、紫外線照射によって白色発光する。
【選択図】図2
Description
出発物質として、BaCO3 5.65g、SrCO3 4.23g、CaCO3 2.87g、Eu2O3 0.31g、MgO 0.5g、およびSiO2 2.98gを混合した。得られた混合物は、Ba:Sr:Ca=1:1:1のmol比であり、Euを1mol%で含んだ。この混合物をアルミナ坩堝に入れて、これを電気炉に置いた。還元性雰囲気下(5% H2および95% N2)で、1200℃で5時間熱処理した。このようにして得た焼結体を粉砕して粉末状にし、蒸留水で洗浄し、最後に100℃のオーブンで乾燥して白色蛍光体サンプル1を得た。この白色蛍光体を用いて、励起光源として紫外線発光ダイオード(波長:390nm)を使用して、図2に示すような白色発光素子1を製造した。
出発物質として、BaCO3 5g、SrCO3 7.48g、CaCO3 2.54g、Eu2O3 0.41g、MgO 0.45g、およびSiO2 2.69gを用いて、Ba:Sr:Ca=1:2:1のmol比で、Euを3mol%を含む混合物を製造した点を除いては、実施例1と同様の方法同様の方法で白色蛍光体サンプル2および白色発光素子2を得た
[実施例3]Euを5mol%で混合
出発物質として、BaCO3 6.68g、SrCO3 5g、CaCO3 6.78g、Eu2O3 0.55g、MgO 0.6g、およびSiO2 3.60gを用いて、Ba:Sr:Ca=1:1:2のmol比を有し、Euを5mol%を含む混合物を製造した点を除いては、実施例1と同様の方法同様の方法で白色蛍光体サンプル3および白色発光素子3を得た。
出発物質として、BaCO3 11.08g、SrCO3 2.07g、CaCO3 1.40g、Eu2O3 0.92g、MgO 0.5g、およびSiO2 2.98gを用いて、Ba:Sr:Ca=4:1:1のmol比で混合物を製造した点を除いては、実施例1と同様の方法で白色蛍光体サンプル4および白色発光素子4を得た。
出発物質として、BaCO3 2.77g、SrCO3 8.29g、CaCO3 1.40g、Eu2O3 0.92g、MgO 0.5g、およびSiO2 2.98gを用いて、Ba:Sr:Ca=1:4:1のmol比で混合物を製造した点を除いては、実施例1と同様の方法で白色蛍光体サンプル5および白色発光素子5を得た。
出発物質として、BaCO3 2.77g、SrCO3 2.07g、CaCO3 5.62g、Eu2O3 0.92g、MgO 0.5g、およびSiO2 2.98gを用いて、Ba:Sr:Ca=1:1:4のmol比で混合物を製造した点を除いては、実施例1と同様の方法で白色蛍光体サンプル6および白色発光素子6を得た。
市販の赤色蛍光体のLa2O2S:Eu3+、市販の緑色蛍光体のBAM:Eu2+、Mn2+および市販の青色蛍光体のSr5(PO4)3Cl:Eu2+を用いて、白色発光素子とした際に、5000K day white color(昼白色)となるように混合物を製造した。そして、実施例と1と同様の方法で、白色蛍光体(比較例1)および白色発光素子(比較例1)を得た。
20 金ワイヤ、
30 電気リード線、
40 白色蛍光体、
50 エポキシモールド層、
60 成形モールド、
70 エポキシドームレンズ。
Claims (18)
- Ba酸化物と、
Sr酸化物と、
Ca酸化物と、
Eu酸化物、Mn酸化物、Sm酸化物、Sn酸化物、Sb酸化物、Ce酸化物、Pr酸化物、Nd酸化物、Gd酸化物、Tb酸化物、Dy酸化物、Ho酸化物、Er酸化物、Tm酸化物、Yb酸化物、およびBi酸化物からなる群から選択される少なくとも1種の金属酸化物と、
Mg酸化物と、
Si酸化物またはGe酸化物と、
を含む混合物を出発物質として、還元雰囲気下で熱処理して得られうるBa−Sr−Ca含有化合物であって、
前記混合物中の各元素のmol比は、Ba:Sr:Ca:(Eu、Mn、Sm、Sn、Sb、Ce、Pr、Nd、Gd、Tb、Dy、Ho、Er、Tm、Yb、およびBi):Mg:(SiおよびGe)=x:y:z:(7−x−y−z):a:bとした場合に、0<x<7、0<y<7、0<z<7、x+y+z<7、0.9<a<1.1、および3.6<b<4.4であり、
紫外線照射によって白色発光することを特徴とするBa−Sr−Ca含有化合物。 - 前記白色発光は、色温度3000〜6500Kの範囲の発光であることを特徴とする、請求項1に記載のBa−Sr−Ca含有化合物。
- 前記白色発光は、色温度3500〜6000Kの範囲の発光であることを特徴とする、請求項2に記載のBa−Sr−Ca含有化合物。
- 前記熱処理は、1000〜1300℃で3〜10時間焼結することによる、請求項1〜3のいずれか1項に記載のBa−Sr−Ca含有化合物。
- 前記Eu酸化物、Mn酸化物、Sm酸化物、Sn酸化物、Sb酸化物、Ce酸化物、Pr酸化物、Nd酸化物、Gd酸化物、Tb酸化物、Dy酸化物、Ho酸化物、Er酸化物、Tm酸化物、Yb酸化物、およびBi酸化物からなる群から選択される少なくとも1種の金属酸化物が、Eu2O3であり、
前記Si酸化物またはGe酸化物が、SiO2であることを特徴とする、請求項1〜4のいずれか1項に記載のBa−Sr−Ca含有化合物。 - 請求項1〜5のいずれか1項に記載のBa−Sr−Ca含有化合物を含む白色蛍光体を有する白色発光素子。
- 紫外線発光ダイオードをさらに含む、請求項6に記載の白色発光素子。
- 前記紫外線発光ダイオードが放出する光は、370〜430nmの波長を有する紫外線であることを特徴とする、請求項7に記載の白色発光素子。
- 前記光は、390〜420nmの波長を有する紫外線であることを特徴とする、請求項8に記載の白色発光素子。
- 赤色蛍光体をさらに含むことを特徴とする、請求項6〜9のいずれか1項に記載の白色発光素子。
- 前記赤色蛍光体は、Y2O3:Eu3+,Bi3+(Sr,Ca,Ba,Mg,Zn)2P2O7:Eu2+,Mn2+;(Ca,Sr,Ba,Mg,Zn)10(PO4)6(F,Cl,Br,OH):Eu2+,Mn2+;(Gd,Y,Lu,La)2O3:Eu3+,Bi3+;(Gd,Y,Lu,La)2O2S:Eu3+,Bi3+;(Gd,Y,Lu,La)BO3:Eu3+,Bi3+;(Gd,Y,Lu,La)(P,V)O4:Eu3+,Bi3+;(Ca,Sr)S:Eu2+;CaLa2S4:Ce3+;(Ba,Sr,Ca)MgP2O7:Eu2+,Mn2+;(Y,Lu)2WO6:Eu3+,Mo6+;(Ba,Sr,Ca)xSiyNz:Eu2+(0.5≦x≦3.1、5≦y≦8、0<z≦3)および(Sr,Ca,Ba,Mg,Zn)2SiO4:Eu2+、Mn2+からなる群から選択される少なくとも1種を含むことを特徴とする、請求項10に記載の白色発光素子。
- 信号灯、通信機器、ディスプレイ装置のバックライト、または照明に用いられることを特徴とする、請求項7〜11のいずれか1項に記載の白色発光素子。
- 請求項6〜11のいずれか1項に記載の白色発光素子を含むランプ。
- 請求項6〜11のいずれか1項に記載の白色発光素子を含む自己発光液晶表示素子。
- Ba酸化物;Sr酸化物;Ca酸化物;Eu酸化物、Mn酸化物、Sm酸化物、Sn酸化物、Sb酸化物、Ce酸化物、Pr酸化物、Nd酸化物、Gd酸化物、Tb酸化物、Dy酸化物、Ho酸化物、Er酸化物、Tm酸化物、Yb酸化物、およびBi酸化物からなる群から選択される少なくとも1種の金属酸化物;Mg酸化物;ならびにSi酸化物またはGe酸化物を、各元素のmol比が、Ba:Sr:Ca:(Eu、Mn、Sm、Sn、Sb、Ce、Pr、Nd、Gd、Tb、Dy、Ho、Er、Tm、Yb、およびBi):Mg:(SiおよびGe)=x:y:z:(7−x−y−z):a:bとした場合に、0<x<7、0<y<7、0<z<7、x+y+z<7、0.9<a<1.1、および3.6<b<4.4となる割合で混合して、出発物質を形成する工程と、
前記出発物質を還元雰囲気下で熱処理して蛍光体を得る工程と、
を含む蛍光体の製造方法。 - 前記蛍光体を粉砕する工程と、
粉砕した前記蛍光体を蒸留水で洗浄する工程と、
洗浄した前記蛍光体を乾燥して白色蛍光体を得る工程と、
をさらに含むことを特徴とする請求項15に記載の製造方法。 - 前記還元雰囲気は、水素、ヘリウム、窒素、アルゴン、およびアンモニアからなる群から選択される少なくとも1種で形成されることを特徴とする、請求項15または16に記載の製造方法。
- 請求項7〜12のいずれか1項に記載の白色発光素子において、
前記紫外線発光ダイオードが放出する紫外線を前記白色蛍光体に照射して、前記白色蛍光体から白色光を発光させる発光方法。
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KR1020070031930A KR100846483B1 (ko) | 2007-03-30 | 2007-03-30 | Ba-Sr-Ca 함유 화합물 및 이를 포함한 백색 발광소자 |
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JP2009256596A (ja) * | 2008-03-19 | 2009-11-05 | Sumitomo Chemical Co Ltd | 蛍光体 |
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TWI393764B (zh) * | 2010-10-15 | 2013-04-21 | Chi Mei Corp | A phosphor and a light emitting device |
TWI393763B (zh) * | 2010-10-15 | 2013-04-21 | Chi Mei Corp | A phosphor and a light emitting device |
CN108003452A (zh) * | 2017-12-29 | 2018-05-08 | 淄博赢信达知识产权咨询服务有限公司 | 大棚膜用聚乙烯组合物及其制备方法 |
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