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Patent Agency Ranking
公开(公告)号：KR1020060133788A
公开(公告)日：2006-12-27
申请号：KR1020050053630
申请日：2005-06-21
Applicant: 한국화학연구원
Abstract: Provided is a method for preparing a thiogallate-based green phosphor which is lowered in heat treatment temperature, does not use additional flux or toxic component and improves the efficiency of a phosphor. The method comprises the steps of mixing 0.5-1.1 mol of an alkaline earth metal precursor, 1.8-2.2 mol of a gallium precursor and 0.001-0.5 mol of an activator precursor to prepare a metal mixture, adding sulfur to the metal mixture, and ball milling the obtained mixture to prepare a thiogallate-based green phosphor precursor; and heat treating the obtained thiogallate-based green phosphor precursor at a temperature of 700-1,000 deg.C under the atmosphere of a mixture gas comprising nitrogen and hydrogen. Preferably the alkaline earth metal precursor is a sulfide or nitride of a metal selected from Ca, Sr and Ba; the gallium precursor is an oxide or nitride; and the activator precursor is a compound of Eu or Ce.
Abstract translation: 本发明提供一种制备在热处理温度下降低的硫代镓酸盐型绿色荧光体的方法，不使用附加的助熔剂或有毒成分，提高荧光体的效率。 该方法包括将0.5-1.1mol碱土金属前体，1.8-2.2mol镓前体和0.001-0.5mol活化剂前体混合以制备金属混合物，向金属混合物中加入硫和球 研磨所得混合物以制备基于硫代镓酸盐的绿色荧光体前体; 在700〜1000℃的温度下，在氮气和氢气的混合气体气氛下，热处理得到的硫代镓酸盐型绿色荧光体前体。 优选地，碱土金属前体是选自Ca，Sr和Ba的金属的硫化物或氮化物; 镓前体是氧化物或氮化物; 并且活化剂前体是Eu或Ce的化合物。
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公开(公告)号：KR1020060133309A
公开(公告)日：2006-12-26
申请号：KR1020050053105
申请日：2005-06-20
Applicant: 한국화학연구원
Abstract: Provided are a novel magnesium thiogallate-based green phosphor which has a wide excitation wavelength of 300-510 nm and is useful for an LED, its preparation method, and a display material using the phosphor. The magnesium thiogallate-based green phosphor is represented by Mg_(x-a) A_z Ga_y S_(x+1.5y): Eu_a, wherein A is Ca, Sr or their mixture; 0.4
Abstract translation: 提供了一种新颖的硫代镓酸镁基荧光粉，其具有300-510nm的宽激发波长，并且可用于LED，其制备方法和使用该荧光体的显示材料。 基于硫代镓酸盐的绿色荧光体由Mg_（x-a）A_z Ga_y S_（x + 1.5y）：Eu_a表示，其中A是Ca，Sr或它们的混合物; 0.4 <= X <= 4; 2 <= y <= 12; 0.001 <= A <= 0.3; 0 <= z <1。 该方法包括称量硫化镁，硫化镓和活化剂硫化物并混合它们的步骤; 并在700-1200℃的温度下在包含氮气和氢气的混合气体条件下热处理所得到的混合物。 优选地，氮和氢的比例为60-95：5-40体积比。
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公开(公告)号：KR1020060131524A
公开(公告)日：2006-12-20
申请号：KR1020050052031
申请日：2005-06-16
Applicant: 한국화학연구원
IPC: C09K11/71
Abstract: Provided is a method for preparing red phosphor based on sulfide of alkali earth metal having improved luminous property at the condition excluding solvent and noxious ingredient for decreasing a temperature, in which heating is achieved at lower temperature than conventional method. The method comprises the steps of (1) dispersing an acid solution containing 0.5-0.9999 mole of alkali earth metal precursor and 0.0001-0.5 mole of europium precursor dissolved therein, into distilled water to prepare an aqueous solution of metal mixture, (2) adding an aqueous solution of sulfate and sulfide of metal of period 3 in elements periodic table to the aqueous solution of metal mixture, adjusting a pH of the solution to 5-10, and filtrating and drying the solution to prepare a precursor of phosphor based on sulfide alkali earth metal sulfide, and (3) heating the precursor at 600-1000 deg.C at the atmosphere of mixture of nitrogen and hydrogen gases.
Abstract translation: 本发明提供一种制备基于硫酸盐的碱土金属硫化物的方法，其在除了溶剂和有害成分之外的条件下具有改善的发光性能，用于降低温度，其中在比常规方法更低的温度下实现加热。 该方法包括以下步骤：（1）将含有0.5-0.9999摩尔碱土金属前体和0.0001-0.5摩尔溶解在其中的铕前体的酸溶液分散到蒸馏水中以制备金属混合物的水溶液，（2）加入 元素周期表中周期3的金属硫酸盐和硫化物水溶液与金属混合物的水溶液，将溶液的pH调节至5-10，并过滤并干燥溶液以制备基于硫化物的磷光体前体 碱土金属硫化物，和（3）在氮气和氢气混合气氛下在600-1000℃加热前体。
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公开(公告)号：KR1020060131523A
公开(公告)日：2006-12-20
申请号：KR1020050052030
申请日：2005-06-16
Applicant: 한국화학연구원
IPC: C09K11/71
Abstract: Provided is a method for preparing a red phosphor based sulfide of alkali earth metal by coprecipitation and pH control, which does not use a separate flux for decreasing a temperature, and uses a mixture of hydrogen and nitrogen in place of noxious gases such as H2S or CS2, and thus is expected to have environmentally and economically excellences. The method comprises the steps of (i) dissolving 0.5-0.9999 mole of precursor of alkali earth metal and 0.0001-0.5 mole of europium precursor into acid to obtain an acidic solution, dispersing the acidic solution into C1-C5 alcohol, and adjusting a pH of the solution to 3-5 to prepare a mixed metal solution, (ii) introducing an aqueous solution of sulfate and sulfide of period 3 metal having pH 8-10 to the mixed metal solution, to adjust a pH to 6-8, and then filtrating and drying the solution to prepare a precursor of phosphor based on alkali earth metal sulfide, and (iii) heating the precursor of phosphor at 600-1000 deg.C at the atmosphere of mixture of nitrogen and hydrogen gases.
Abstract translation: 本发明提供了一种通过共沉淀和pH控制制备红色荧光体的碱土金属硫化物的方法，其不使用单独的助熔剂来降低温度，并且使用氢和氮的混合物代替有害气体如H 2 S或 CS2，因此预期在环境和经济上都是优秀的。 该方法包括以下步骤：（i）将0.5-0.9999摩尔碱土金属前体和0.0001-0.5摩尔铕前体溶解在酸中，得到酸性溶液，将酸性溶液分散在C1-C5醇中，并调节pH 的溶液至3-5以制备混合金属溶液，（ii）将pH8-10的第3期金属的硫酸盐和硫化物水溶液引入混合金属溶液中，将pH调节至6-8， 然后过滤并干燥溶液以制备基于碱土金属硫化物的荧光体前体，和（iii）在氮和氢气混合气氛下在600-1000摄氏度加热磷光体前体。
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