The Experts below are selected from a list of 246 Experts worldwide ranked by ideXlab platform
Hiromasa Hanzawa - One of the best experts on this subject based on the ideXlab platform.
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Synthesis and luminescent properties of low oxygen contained Eu2+-doped Ca-α-SiAlON phosphor from Calcium Cyanamide reduction
Journal of Rare Earths, 2008Co-Authors: Xianqing Piao, Ken-ichi Machida, Takashi Horikawa, Hiromasa HanzawaAbstract:Abstract A new convenient Calcium Cyanamide (CaCN2) reduction route was developed to synthesize the Eu2+ activated Ca-α-SiAlON phosphors containing low oxygen content. The luminescence properties of the obtained products were investigated for white LEDs application. The critical Eu2+ concentration in various hosts and its effect on the photoluminescence properties were studied. The optimized sample (10at.% Eu2+ vs. Ca2+) could be efficiently excited by the current GaN/InGaN blue LED chips and provided emission intensity competitive with that of YAG:Ce3+ (P46-Y3) standard, revealing that this phosphor was a potential candidate for phosphor-converted white LEDs.
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Synthesis of Nitridosilicate CaSr1-xEuxSi5N8 (x = 0-1) Phosphor by Calcium Cyanamide Reduction for White Light-Emitting Diode Applications
Journal of The Electrochemical Society, 2008Co-Authors: Xianqing Piao, Ken-ichi Machida, Takashi Horikawa, Hiromasa HanzawaAbstract:A convenient Calcium Cyanamide (CaCN 2 ) reduction route was developed to synthesize the Eu 2+ -doped nitridosilicate phosphors, CaSr 1-x Eu x Si 5 N 8 (x = 0-1), and the photoluminescence properties of the obtained phosphors were characterized for solid-state lighting applications [white light-emitting diodes (LEDs)]. The Rietveld refinement analysis for undoped CaSrSi 5 N 8 was carried out in space group Pmn2 1 (no. 31) with a = 569.0(4) pm, b = 673.0(1) pm, and c = 932.0(6) pm. The Eu 2+ ions formed a complete solid solution by occupying the Sr 2+ sites in CaSrSi 5 N 8 host lattice. A typical sample doped with an optimized amount of Eu 2+ (2 atom % vs Ca/Sr) showed a broadband absorption covering the range from UV to visible region (380-500 nm) and strong red emission peaking at 629 nm, revealing that this phosphor was a potential candidate for the phosphor-converted white LEDs. Under excitation of 460 nm, this phosphor gave the intensity comparable (about 120%) to that of yttrium aluminum garnet YAG:Ce 3+ (P46-Y3) standard. The emission peaks of CaSr 1-x Eu x Si 5 N 8 :Eu 2+ varied from 625 to 680 nm with increasing Eu 2+ ion concentration. The redshifting behavior of the emission band dominantly contributed to the energy migration among Eu 2+ ions.
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synthesis of nitridosilicate casr1 xeuxsi5n8 x 0 1 phosphor by Calcium Cyanamide reduction for white light emitting diode applications
Journal of The Electrochemical Society, 2008Co-Authors: Xianqing Piao, Ken-ichi Machida, Takashi Horikawa, Hiromasa HanzawaAbstract:A convenient Calcium Cyanamide (CaCN 2 ) reduction route was developed to synthesize the Eu 2+ -doped nitridosilicate phosphors, CaSr 1-x Eu x Si 5 N 8 (x = 0-1), and the photoluminescence properties of the obtained phosphors were characterized for solid-state lighting applications [white light-emitting diodes (LEDs)]. The Rietveld refinement analysis for undoped CaSrSi 5 N 8 was carried out in space group Pmn2 1 (no. 31) with a = 569.0(4) pm, b = 673.0(1) pm, and c = 932.0(6) pm. The Eu 2+ ions formed a complete solid solution by occupying the Sr 2+ sites in CaSrSi 5 N 8 host lattice. A typical sample doped with an optimized amount of Eu 2+ (2 atom % vs Ca/Sr) showed a broadband absorption covering the range from UV to visible region (380-500 nm) and strong red emission peaking at 629 nm, revealing that this phosphor was a potential candidate for the phosphor-converted white LEDs. Under excitation of 460 nm, this phosphor gave the intensity comparable (about 120%) to that of yttrium aluminum garnet YAG:Ce 3+ (P46-Y3) standard. The emission peaks of CaSr 1-x Eu x Si 5 N 8 :Eu 2+ varied from 625 to 680 nm with increasing Eu 2+ ion concentration. The redshifting behavior of the emission band dominantly contributed to the energy migration among Eu 2+ ions.
Xianqing Piao - One of the best experts on this subject based on the ideXlab platform.
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Synthesis and luminescent properties of low oxygen contained Eu2+-doped Ca-α-SiAlON phosphor from Calcium Cyanamide reduction
Journal of Rare Earths, 2008Co-Authors: Xianqing Piao, Ken-ichi Machida, Takashi Horikawa, Hiromasa HanzawaAbstract:Abstract A new convenient Calcium Cyanamide (CaCN2) reduction route was developed to synthesize the Eu2+ activated Ca-α-SiAlON phosphors containing low oxygen content. The luminescence properties of the obtained products were investigated for white LEDs application. The critical Eu2+ concentration in various hosts and its effect on the photoluminescence properties were studied. The optimized sample (10at.% Eu2+ vs. Ca2+) could be efficiently excited by the current GaN/InGaN blue LED chips and provided emission intensity competitive with that of YAG:Ce3+ (P46-Y3) standard, revealing that this phosphor was a potential candidate for phosphor-converted white LEDs.
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Synthesis of Nitridosilicate CaSr1-xEuxSi5N8 (x = 0-1) Phosphor by Calcium Cyanamide Reduction for White Light-Emitting Diode Applications
Journal of The Electrochemical Society, 2008Co-Authors: Xianqing Piao, Ken-ichi Machida, Takashi Horikawa, Hiromasa HanzawaAbstract:A convenient Calcium Cyanamide (CaCN 2 ) reduction route was developed to synthesize the Eu 2+ -doped nitridosilicate phosphors, CaSr 1-x Eu x Si 5 N 8 (x = 0-1), and the photoluminescence properties of the obtained phosphors were characterized for solid-state lighting applications [white light-emitting diodes (LEDs)]. The Rietveld refinement analysis for undoped CaSrSi 5 N 8 was carried out in space group Pmn2 1 (no. 31) with a = 569.0(4) pm, b = 673.0(1) pm, and c = 932.0(6) pm. The Eu 2+ ions formed a complete solid solution by occupying the Sr 2+ sites in CaSrSi 5 N 8 host lattice. A typical sample doped with an optimized amount of Eu 2+ (2 atom % vs Ca/Sr) showed a broadband absorption covering the range from UV to visible region (380-500 nm) and strong red emission peaking at 629 nm, revealing that this phosphor was a potential candidate for the phosphor-converted white LEDs. Under excitation of 460 nm, this phosphor gave the intensity comparable (about 120%) to that of yttrium aluminum garnet YAG:Ce 3+ (P46-Y3) standard. The emission peaks of CaSr 1-x Eu x Si 5 N 8 :Eu 2+ varied from 625 to 680 nm with increasing Eu 2+ ion concentration. The redshifting behavior of the emission band dominantly contributed to the energy migration among Eu 2+ ions.
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synthesis of nitridosilicate casr1 xeuxsi5n8 x 0 1 phosphor by Calcium Cyanamide reduction for white light emitting diode applications
Journal of The Electrochemical Society, 2008Co-Authors: Xianqing Piao, Ken-ichi Machida, Takashi Horikawa, Hiromasa HanzawaAbstract:A convenient Calcium Cyanamide (CaCN 2 ) reduction route was developed to synthesize the Eu 2+ -doped nitridosilicate phosphors, CaSr 1-x Eu x Si 5 N 8 (x = 0-1), and the photoluminescence properties of the obtained phosphors were characterized for solid-state lighting applications [white light-emitting diodes (LEDs)]. The Rietveld refinement analysis for undoped CaSrSi 5 N 8 was carried out in space group Pmn2 1 (no. 31) with a = 569.0(4) pm, b = 673.0(1) pm, and c = 932.0(6) pm. The Eu 2+ ions formed a complete solid solution by occupying the Sr 2+ sites in CaSrSi 5 N 8 host lattice. A typical sample doped with an optimized amount of Eu 2+ (2 atom % vs Ca/Sr) showed a broadband absorption covering the range from UV to visible region (380-500 nm) and strong red emission peaking at 629 nm, revealing that this phosphor was a potential candidate for the phosphor-converted white LEDs. Under excitation of 460 nm, this phosphor gave the intensity comparable (about 120%) to that of yttrium aluminum garnet YAG:Ce 3+ (P46-Y3) standard. The emission peaks of CaSr 1-x Eu x Si 5 N 8 :Eu 2+ varied from 625 to 680 nm with increasing Eu 2+ ion concentration. The redshifting behavior of the emission band dominantly contributed to the energy migration among Eu 2+ ions.
Ken-ichi Machida - One of the best experts on this subject based on the ideXlab platform.
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Synthesis and luminescent properties of low oxygen contained Eu2+-doped Ca-α-SiAlON phosphor from Calcium Cyanamide reduction
Journal of Rare Earths, 2008Co-Authors: Xianqing Piao, Ken-ichi Machida, Takashi Horikawa, Hiromasa HanzawaAbstract:Abstract A new convenient Calcium Cyanamide (CaCN2) reduction route was developed to synthesize the Eu2+ activated Ca-α-SiAlON phosphors containing low oxygen content. The luminescence properties of the obtained products were investigated for white LEDs application. The critical Eu2+ concentration in various hosts and its effect on the photoluminescence properties were studied. The optimized sample (10at.% Eu2+ vs. Ca2+) could be efficiently excited by the current GaN/InGaN blue LED chips and provided emission intensity competitive with that of YAG:Ce3+ (P46-Y3) standard, revealing that this phosphor was a potential candidate for phosphor-converted white LEDs.
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Synthesis of Nitridosilicate CaSr1-xEuxSi5N8 (x = 0-1) Phosphor by Calcium Cyanamide Reduction for White Light-Emitting Diode Applications
Journal of The Electrochemical Society, 2008Co-Authors: Xianqing Piao, Ken-ichi Machida, Takashi Horikawa, Hiromasa HanzawaAbstract:A convenient Calcium Cyanamide (CaCN 2 ) reduction route was developed to synthesize the Eu 2+ -doped nitridosilicate phosphors, CaSr 1-x Eu x Si 5 N 8 (x = 0-1), and the photoluminescence properties of the obtained phosphors were characterized for solid-state lighting applications [white light-emitting diodes (LEDs)]. The Rietveld refinement analysis for undoped CaSrSi 5 N 8 was carried out in space group Pmn2 1 (no. 31) with a = 569.0(4) pm, b = 673.0(1) pm, and c = 932.0(6) pm. The Eu 2+ ions formed a complete solid solution by occupying the Sr 2+ sites in CaSrSi 5 N 8 host lattice. A typical sample doped with an optimized amount of Eu 2+ (2 atom % vs Ca/Sr) showed a broadband absorption covering the range from UV to visible region (380-500 nm) and strong red emission peaking at 629 nm, revealing that this phosphor was a potential candidate for the phosphor-converted white LEDs. Under excitation of 460 nm, this phosphor gave the intensity comparable (about 120%) to that of yttrium aluminum garnet YAG:Ce 3+ (P46-Y3) standard. The emission peaks of CaSr 1-x Eu x Si 5 N 8 :Eu 2+ varied from 625 to 680 nm with increasing Eu 2+ ion concentration. The redshifting behavior of the emission band dominantly contributed to the energy migration among Eu 2+ ions.
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synthesis of nitridosilicate casr1 xeuxsi5n8 x 0 1 phosphor by Calcium Cyanamide reduction for white light emitting diode applications
Journal of The Electrochemical Society, 2008Co-Authors: Xianqing Piao, Ken-ichi Machida, Takashi Horikawa, Hiromasa HanzawaAbstract:A convenient Calcium Cyanamide (CaCN 2 ) reduction route was developed to synthesize the Eu 2+ -doped nitridosilicate phosphors, CaSr 1-x Eu x Si 5 N 8 (x = 0-1), and the photoluminescence properties of the obtained phosphors were characterized for solid-state lighting applications [white light-emitting diodes (LEDs)]. The Rietveld refinement analysis for undoped CaSrSi 5 N 8 was carried out in space group Pmn2 1 (no. 31) with a = 569.0(4) pm, b = 673.0(1) pm, and c = 932.0(6) pm. The Eu 2+ ions formed a complete solid solution by occupying the Sr 2+ sites in CaSrSi 5 N 8 host lattice. A typical sample doped with an optimized amount of Eu 2+ (2 atom % vs Ca/Sr) showed a broadband absorption covering the range from UV to visible region (380-500 nm) and strong red emission peaking at 629 nm, revealing that this phosphor was a potential candidate for the phosphor-converted white LEDs. Under excitation of 460 nm, this phosphor gave the intensity comparable (about 120%) to that of yttrium aluminum garnet YAG:Ce 3+ (P46-Y3) standard. The emission peaks of CaSr 1-x Eu x Si 5 N 8 :Eu 2+ varied from 625 to 680 nm with increasing Eu 2+ ion concentration. The redshifting behavior of the emission band dominantly contributed to the energy migration among Eu 2+ ions.
Takashi Horikawa - One of the best experts on this subject based on the ideXlab platform.
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Synthesis and luminescent properties of low oxygen contained Eu2+-doped Ca-α-SiAlON phosphor from Calcium Cyanamide reduction
Journal of Rare Earths, 2008Co-Authors: Xianqing Piao, Ken-ichi Machida, Takashi Horikawa, Hiromasa HanzawaAbstract:Abstract A new convenient Calcium Cyanamide (CaCN2) reduction route was developed to synthesize the Eu2+ activated Ca-α-SiAlON phosphors containing low oxygen content. The luminescence properties of the obtained products were investigated for white LEDs application. The critical Eu2+ concentration in various hosts and its effect on the photoluminescence properties were studied. The optimized sample (10at.% Eu2+ vs. Ca2+) could be efficiently excited by the current GaN/InGaN blue LED chips and provided emission intensity competitive with that of YAG:Ce3+ (P46-Y3) standard, revealing that this phosphor was a potential candidate for phosphor-converted white LEDs.
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Synthesis of Nitridosilicate CaSr1-xEuxSi5N8 (x = 0-1) Phosphor by Calcium Cyanamide Reduction for White Light-Emitting Diode Applications
Journal of The Electrochemical Society, 2008Co-Authors: Xianqing Piao, Ken-ichi Machida, Takashi Horikawa, Hiromasa HanzawaAbstract:A convenient Calcium Cyanamide (CaCN 2 ) reduction route was developed to synthesize the Eu 2+ -doped nitridosilicate phosphors, CaSr 1-x Eu x Si 5 N 8 (x = 0-1), and the photoluminescence properties of the obtained phosphors were characterized for solid-state lighting applications [white light-emitting diodes (LEDs)]. The Rietveld refinement analysis for undoped CaSrSi 5 N 8 was carried out in space group Pmn2 1 (no. 31) with a = 569.0(4) pm, b = 673.0(1) pm, and c = 932.0(6) pm. The Eu 2+ ions formed a complete solid solution by occupying the Sr 2+ sites in CaSrSi 5 N 8 host lattice. A typical sample doped with an optimized amount of Eu 2+ (2 atom % vs Ca/Sr) showed a broadband absorption covering the range from UV to visible region (380-500 nm) and strong red emission peaking at 629 nm, revealing that this phosphor was a potential candidate for the phosphor-converted white LEDs. Under excitation of 460 nm, this phosphor gave the intensity comparable (about 120%) to that of yttrium aluminum garnet YAG:Ce 3+ (P46-Y3) standard. The emission peaks of CaSr 1-x Eu x Si 5 N 8 :Eu 2+ varied from 625 to 680 nm with increasing Eu 2+ ion concentration. The redshifting behavior of the emission band dominantly contributed to the energy migration among Eu 2+ ions.
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synthesis of nitridosilicate casr1 xeuxsi5n8 x 0 1 phosphor by Calcium Cyanamide reduction for white light emitting diode applications
Journal of The Electrochemical Society, 2008Co-Authors: Xianqing Piao, Ken-ichi Machida, Takashi Horikawa, Hiromasa HanzawaAbstract:A convenient Calcium Cyanamide (CaCN 2 ) reduction route was developed to synthesize the Eu 2+ -doped nitridosilicate phosphors, CaSr 1-x Eu x Si 5 N 8 (x = 0-1), and the photoluminescence properties of the obtained phosphors were characterized for solid-state lighting applications [white light-emitting diodes (LEDs)]. The Rietveld refinement analysis for undoped CaSrSi 5 N 8 was carried out in space group Pmn2 1 (no. 31) with a = 569.0(4) pm, b = 673.0(1) pm, and c = 932.0(6) pm. The Eu 2+ ions formed a complete solid solution by occupying the Sr 2+ sites in CaSrSi 5 N 8 host lattice. A typical sample doped with an optimized amount of Eu 2+ (2 atom % vs Ca/Sr) showed a broadband absorption covering the range from UV to visible region (380-500 nm) and strong red emission peaking at 629 nm, revealing that this phosphor was a potential candidate for the phosphor-converted white LEDs. Under excitation of 460 nm, this phosphor gave the intensity comparable (about 120%) to that of yttrium aluminum garnet YAG:Ce 3+ (P46-Y3) standard. The emission peaks of CaSr 1-x Eu x Si 5 N 8 :Eu 2+ varied from 625 to 680 nm with increasing Eu 2+ ion concentration. The redshifting behavior of the emission band dominantly contributed to the energy migration among Eu 2+ ions.
Yongsong Zhang - One of the best experts on this subject based on the ideXlab platform.
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effect of Calcium Cyanamide ammonium bicarbonate and lime mixture and ammonia water on survival of ralstonia solanacearum and microbial community
Scientific Reports, 2016Co-Authors: Xiaolin He, Hao Wu, Caixian Tang, Yongsong ZhangAbstract:Effect of Calcium Cyanamide, ammonium bicarbonate and lime mixture, and ammonia water on survival of Ralstonia solanacearum and microbial community
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Effect of Calcium Cyanamide, ammonium bicarbonate and lime mixture, and ammonia water on survival of Ralstonia solanacearum and microbial community.
Scientific reports, 2016Co-Authors: Lijuan Liu, Caixian Tang, Chengliang Sun, Xingxing Liu, Miao Liu, Chong Wei Jin, Yongsong ZhangAbstract:The inorganic nitrogenous amendments Calcium Cyanamide (CC), ammonia water (AW), and a mixture of ammonium bicarbonate with lime (A+L) are popularly used as fumigants to control soil-borne disease in China. However, it is unclear which of these fumigants is more effective in controlling R. solanacearum. This present study compared the efficiencies of the three nitrogenous amendments listed above at four nitrogen levels in suppressing the survival of R. solanacearum in soil. The CC showed the best ability to suppress R. solanacearum due to its highest capacity to increase soil and NO2(-) contents and pH. However, AW was more suitable to controlling bacterial wilt caused by R. solanacearum because it had a lower cost and its application rate of 0.25 g N kg(-1) soil could effectively suppress the survival of R. solanacearum. Additionally, soil microbial activity and community populations were restored to their initial state four weeks after the application of each fumigant, indicating that the three fumigants had few detrimental impacts on soil microbial activity and community structure with an exception of the suppression of R. solanacearum. The present study provides guidance for the selection of a suitable alkaline nitrogenous amendment and its application rate in controlling bacterial wilt.
