WO2011153692A1 - 氧化物锡酸盐发光材料及其制备方法 - Google Patents

氧化物锡酸盐发光材料及其制备方法 Download PDF

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WO2011153692A1
WO2011153692A1 PCT/CN2010/073720 CN2010073720W WO2011153692A1 WO 2011153692 A1 WO2011153692 A1 WO 2011153692A1 CN 2010073720 W CN2010073720 W CN 2010073720W WO 2011153692 A1 WO2011153692 A1 WO 2011153692A1
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oxide
luminescent material
stannate
compound
flux
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PCT/CN2010/073720
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French (fr)
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周明杰
马文波
梁小芳
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海洋王照明科技股份有限公司
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Priority to PCT/CN2010/073720 priority Critical patent/WO2011153692A1/zh
Priority to US13/702,151 priority patent/US8961826B2/en
Priority to EP10852685.6A priority patent/EP2581435B1/en
Priority to CN2010800668821A priority patent/CN102906220A/zh
Priority to JP2013513511A priority patent/JP5715242B2/ja
Publication of WO2011153692A1 publication Critical patent/WO2011153692A1/zh

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    • C09DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09KMATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7783Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals one of which being europium
    • C09K11/7784Chalcogenides
    • C09K11/7787Oxides

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  • the present invention relates to the field of luminescent materials and illumination technology, and in particular to an oxide stannate luminescent material and a preparation method thereof.
  • the field emission device has attracted attention due to its low operating voltage (200-5000V), low power consumption, and high brightness.
  • the principle of the FED is similar to that of a cathode ray tube (CRT). It emits light by bombarding the phosphor on the display.
  • the phosphors used are mainly divided into two categories: sulfide series and oxide series.
  • the phosphors of the sulfide series have high luminosity, but the stability is poor, and it is easy to decompose and generate sulfur under the low-pressure and high-current electron beam bombardment, so that the performance of the material itself is degraded, and the sulfur generated by the decomposition is "toxic" to the cathode emitting needle. "effect.
  • the oxide series has high stability, so the study of oxide series phosphors has a large market value.
  • the stannate Ln 2 Sn 2 0 7 is an important class of rare earth pyrochlore structural materials with good chemical stability and is widely used in piezoelectric and dielectric fields, and due to the improvement of the preparation method, stannic acid
  • the salt Ln 2 Sn 2 0 7 material has nano-structural properties and is increasingly used for research and application in nano-optoelectronic devices. It has been reported that Ln 2 Sn 2 0 7 :Eu 3+ material can be used as a red powder material for fluorescent lamps under ultraviolet excitation. However, stannate materials may be applied to field emission devices due to their good electrical properties, and in the existing reports, there are few studies on the use of stannate materials for field emission.
  • An oxide stannate luminescent material having a chemical formula of Ln 2 _ x Eu x Sn 2 0 7 , wherein Ln is any one of metals Gd, Y, and La, and X has a value ranging from 0.1 ⁇ x ⁇ 1.5.
  • the oxide stannate luminescent material of the above structure can be used as a red luminescent material in a field emission illuminating device due to its good electrical characteristics and good anti-shocking characteristics.
  • a method for preparing an oxide stannate luminescent material comprising the steps of: Sl, providing a Ln compound, an Eu compound, a Sn compound according to a molar ratio of each element in the chemical formula Ln 2 ⁇ c Eu x Sn 2 0 7 Raw material, grinding and mixing to form a mixture; wherein, Ln is any one of Gd, Y, La; 0.1 ⁇ x ⁇ 1.5;
  • the mixture is pre-fired at 300-500 ° C for 3-5 h, cooled to room temperature, ground into a mixed powder;
  • the mixed powder is calcined at 1200-1400 ° C for l-24 h, cooled to room temperature, and ground to obtain an oxide stannate luminescent material.
  • the Ln compound is an Ln oxide or an Ln nitrate.
  • the Eu compound is Eu 2 O 3 or Eu(N0 3 ) 3 .
  • the Sn compound is Sn0 2 or Sn(OH) 2 .
  • the method further comprises the step of adding a flux to the raw material mixture, wherein the flux is added in an amount of 1 to 5% of the total moles of each element in the oxide stannate luminescent material.
  • the flux is H 3 B0 3 or magnesium fluoride MgF 2 .
  • the oxide stannate luminescent material having the above chemical structure has good electrical characteristics and chemical stability, and has strong anti-electron bombardment ability, and can be widely used in field emission luminescent devices and the like.
  • the above preparation method is simple in operation, non-polluting, easy to control process conditions, low in preparation temperature, energy saving, low requirements on equipment, and good stability of the obtained luminescent material.
  • Fig. 1 is a chart showing the CL emission spectrum of the luminescent material prepared in Example 2 at an acceleration voltage of 3 kV. ⁇ detailed description ⁇
  • An oxide stannate luminescent material with stable luminescent properties the chemical formula of which is: Ln 2 _ x Eu x Sn 2 0 7 , wherein Ln is one of metals Gd, Y, La, and the value of x The range is 0.1 ⁇ x ⁇ 1.5.
  • a method for preparing an oxide stannate luminescent material is also provided below, according to a chemical formula Ln 2-x Eu x Sn 2 0 7 , 0.1 ⁇ x ⁇ 1.5 , weigh the corresponding proportion of Ln oxide or Ln nitrate, Eu 2 O 3 or Eu(N0 3 ) 3 , Sn0 2 or Sn(OH) 2 The mixture is mixed to form a mixture, and the mixture is pre-fired at 300-500 ° C for 3-5 hours, then cooled and ground, and finally the calcined product is calcined at 1200-1400 ° C for 1-24 hours, and cooled and ground. That is, the oxide stannate luminescent material L x Eu x Sn 2 0 7 is obtained .
  • the method further comprises the step of adding a flux to the mixture in a proportion of 0-5% of the moles of the oxide silicate luminescent material, wherein the flux is H 3 B0 3 or MgF 2 .
  • oxide stannate luminescent material the preparation method thereof, the luminescent property and the like of the specific examples will be further described in detail.
  • Example 2 preparing Y ⁇ EUCHSSI ⁇ C ⁇ luminescent material:
  • 0.5222 g of yttrium oxide Y 2 O 3 , 0.0660 g of lanthanum oxide Eu 2 0 3 , 0.7535 g of tin oxide Sn0 2 , and a flux (5%) boric acid H 3 BO 3 0.0077 g were weighed in a stoichiometric ratio. After thoroughly grinding all the materials in an agate mortar, they were pre-sintered at 500 ° C for 3 h in a corundum crucible, then cooled to room temperature and thoroughly ground again. Finally, the ground product was calcined at 1400 ° C for 5 h, cooled to room temperature, and after grinding, Y ⁇ Euo ⁇ Si ⁇ C ⁇ stannate red luminescent material was obtained.
  • Fig. 1 The emission spectrum of the stannate material YLSSEUCHSSI ⁇ C ⁇ under the excitation of a cathode ray with an acceleration voltage of 3 kV is shown in Fig. 1.
  • Eu ions are doped in Y 2 Sn 2 0 7 , Eu is in the center of symmetry, and emits orange-red light near 590 nm.
  • Such materials prepared by high temperature solid phase method can be used for field emission luminescent materials due to their good stability and their cathode ray luminescence properties.
  • Example 3 Preparation of YLsEU sSl ⁇ O?
  • Luminescent material Strontium oxide Y 2 0 3 0.4234 g, cerium oxide Eu 2 0 3 0.0440 g, tin hydroxide Sn(OH) 2 0.7636 g, flux (1%) boric acid H 3 B0 3 0.0015 g were weighed in a stoichiometric ratio. All the materials were thoroughly ground in an agate mortar, pre-sintered at 500 ° C for 2 h in a corundum crucible, then cooled to room temperature, and thoroughly ground again. Finally, the ground product was calcined at 1300 ° C for 5 h, cooled to room temperature, and YL EUO.SSI ⁇ C ⁇ stannate red luminescent material was obtained after grinding.
  • Example 4 Preparation of Gd L0 Eu L0 Sn 2 O 7 luminescent material:
  • Strontium oxide La 2 0 3 0.6109 g, cerium oxide Eu 2 0 3 0.2200 g, tin hydroxide Sn(OH) 2 0.7636 g, flux (3%) boric acid H 3 B0 3 0.0046 g were weighed in a stoichiometric ratio. All the materials were thoroughly ground in an agate mortar, pre-sintered in a corundum crucible at 400 ° C for 5 h, then cooled to room temperature and thoroughly ground again. Finally, the ground product was calcined at 1400 ° C for 12 h, cooled to room temperature, and polished to obtain a LauEuo.sSi ⁇ C ⁇ stannate red luminescent material.
  • the oxide stannate luminescent material having the above chemical structure has good electrical properties and good stability Qualitative, and strong anti-electron bombardment ability, can be widely used in field emission light-emitting devices and other fields.
  • the above preparation method is simple in operation, non-polluting, easy to control process conditions, low in preparation temperature, energy saving, low requirements on equipment, and good stability of the obtained luminescent material. By adding a flux to the mixture during the preparation, the reaction can be made more complete and the reaction temperature lowered.

Description

氧化物锡酸盐发光材料及其制备方法
【技术领域】
本发明涉及发光材料及照明技术领域, 尤其涉及一种氧化物锡酸盐发光材 料及其制备方法。
【背景技术】
场发射器件(FED ) 由于其具备较低的工作电压 (200-5000V ) 、 功耗小、 亮度高等优良特性而备受关注。 FED的原理和阴极射线管(CRT )类似, 是通过 电子束轰击显示屏上的荧光粉而发光, 所采用的荧光粉从组成上主要分为两大 类: 硫化物系列和氧化物系列。 硫化物系列的荧光粉具有较高的发光亮度, 但 稳定性差, 在低压大电流电子束轰击下易分解产生硫, 从而使材料本身的性能 衰退, 同时分解产生的硫对阴极发射针具有"毒化"作用。氧化物系列则具有较高 的稳定性, 因此, 研究氧化物系列荧光粉具有 ^[艮大的市场应用价值。
锡酸盐 Ln2Sn207是一类重要的稀土烧绿石结构材料, 其化学稳定性好, 被 广泛应用于压电、 介电学方面, 且由于随着制备方法的改进, 锡酸盐 Ln2Sn207 材料具有纳米结构特性, 越来越被用于纳米光电器件方面的研究应用。 据报道, Ln2Sn207:Eu3+材料在紫外光激发下, 可被用作荧光灯方面的红粉材料。 然而, 锡酸盐材料由于其具有良好的电特性, 有可能被应用于场发射器件方面, 而在 现有报道中, 关于锡酸盐材料用于场发射方面的研究较少。
【发明内容】
基于此, 有必要提供一种发光性能稳定的用于场发射器件方面的氧化物锡 酸盐发光材料。
一种氧化物锡酸盐发光材料, 化学通式为 Ln2_xEuxSn207, 其中, Ln为金属 Gd、 Y、 La中的任一种, X的取值范围为 0.1≤x≤1.5。
上述结构的氧化物锡酸盐发光材料由于其良好的电特性, 及良好的抗轰击 特性可作为场发射发光器件中的红色发光材料应用。 此外, 还有必要提供一种发光性能稳定的氧化物锡酸盐发光材料的制备方 法。
一种氧化物锡酸盐发光材料的制备方法, 包括如下步骤: Sl、 根据化学通 式 Ln2→cEuxSn207中各元素的摩尔比, 提供 Ln化合物、 Eu化合物、 Sn化合物的 原料,研磨混合均匀形成混合料;其中, Ln为 Gd、 Y、 La中的任一种; 0.1<x<1.5;
52、 将所述混合料经 300-500°C下预烧 3-5h, 冷却至室温, 研磨成混合粉体;
53、 将混合粉体于 1200-1400°C煅烧 l-24h, 冷却至室温, 研磨即得氧化物锡酸 盐发光材料。
优选的 , 所述 Ln化合物为 Ln氧化物或 Ln硝酸盐。
优选的, 所述 Eu化合物为 Eu203或 Eu(N03)3
优选的, 所述 Sn化合物为 Sn02或 Sn(OH)2
优选的, 步骤 S1中, 还包括向原料混合物中添加助熔剂的步骤, 所述助熔 剂的添加量为所述氧化物锡酸盐发光材料中各元素总摩尔数的 1〜5%。
优选的, 所述助熔剂为 H3B03或氟化镁 MgF2
具有上述化学结构的氧化物锡酸盐发光材料具有良好的电特性及化学稳定 性, 且抗电子轰击能力强, 可广泛应用于场发射发光器件等领域。
同时, 上述制备方法操作简单、 无污染、 工艺条件易控制、 制备温度低, 节约能源, 对设备要求低、 并且制得的发光材料稳定性好。
制备过程中通过在混合料中加入助熔剂, 可以使反应更充分, 反应温度降 低。 【附图说明】
图 1为实施例 2所制备的发光材料在加速电压为 3kv时的 CL发射光谱图。 【具体实施方式】
一种发光性能稳定的氧化物锡酸盐发光材料,其化学通式为: Ln2_xEuxSn207, 其中, Ln为金属 Gd、 Y、 La中的一种, x的取值范围为 0.1≤x≤1.5。
下面还提供了一种氧化物锡酸盐发光材料的制备方法, 根据化学通式 Ln2-xEuxSn207 , 0.1<x<1.5 , 称取相应比例的 Ln氧化物或 Ln硝酸盐、 Eu203或 Eu(N03)3、 Sn02或 Sn(OH)2为原料混合形成混合料,再将所述混合料于 300-500 °C 预烧 3-5小时后冷却研磨, 最后将预烧后的研磨产物于 1200-1400 °C煅烧 l-24h, 冷却研磨即得所述氧化物锡酸盐发光材料 L xEuxSn207
优选的, 还包括按氧化物硅酸盐发光材料摩尔数的 0-5%的比例向所述混合 料中加入助熔剂的步骤, 其中, 助熔剂为 H3B03或 MgF2
下面主要结合具体实施例对的氧化物锡酸盐发光材料及其制备方法作、 发 光性能等作进一步详细的介绍。
实施例 1 , 制备 Gd^Eu^Si^C^发光材料:
按化学计量比称取氧化札 Gd203 0.8156g、 氧化铕 Eu203 0.0880g、 氧化锡 Sn02 0.7535g、 助熔剂 (添加量为氧化物锡酸盐发光材料中各元素总摩尔数的 5%, 下同)硼酸 H3BO3 0.0077g。 将所有物质置于玛瑙研钵中充分研磨后, 放入 刚玉坩埚中在 400°C下预烧结 4h, 然后冷却至室温, 再次充分研磨。 最后, 将再 次研磨产物在 1200°C下煅烧 10h,冷却至室温,研磨后即得 Gd^Euc Si^C^锡酸盐 红色发光材料。 实施例 2 , 制备 Y^EUCHSSI^C^发光材料:
按化学计量比称取氧化钇 Y2O3 0.5222g、氧化铕 Eu203 0.0660g、氧化锡 Sn02 0.7535g、 助熔剂(5% )硼酸 H3BO3 0.0077g。 将所有物质置于玛瑙研钵中充分研 磨后, 放入刚玉坩埚中在 500 °C下预烧结 3h, 然后冷却至室温, 再次充分研磨。 最后, 将再次研磨产物在 1400°C下煅烧 5h , 冷却至室温, 研磨后即得 Y^Euo^Si^C^锡酸盐红色发光材料。
该锡酸盐材料 YLSSEUCHSSI^C^在加速电压为 3kv的阴极射线激发下的发射光 谱见图 1。 由图 1知, 在 Y2Sn207中掺杂 Eu离子, Eu处于对称中心格位, 发射位于 590nm附近的橙红色光。采用高温固相法制备得到的此类材料可由于其良好的稳 定性及其阴极射线发光特性, 可用于场发射发光材料。 实施例 3 , 制备 YLsEU sSl^O?发光材料: 按化学计量比称取氧化钇 Y203 0.4234g、 氧化铕 Eu203 0.0440g、 氢氧化锡 Sn(OH)2 0.7636g、 助熔剂 ( 1% )硼酸 H3B03 0.0015g。 将所有物质置于玛瑙研钵 中充分研磨后, 放入刚玉坩埚中在 500°C下预烧结 2h, 然后冷却至室温, 再次充 分研磨。 最后, 将再次研磨产物在 1300°C下煅烧 5h, 冷却至室温, 研磨后即得 YL EUO.SSI^C^锡酸盐红色发光材料。 实施例 4, 制备 GdL0EuL0Sn2O7发光材料:
按化学计量比称取硝酸札 Gd(N03)3'6H20 1.1284g、 硝酸铕 Eu(N03)3'6H20 1.1152g、 氧化锡 SnO2 0.7535g、 助熔剂 (2% ) 氟化镁 MgF2 0.003 lg。 将所有物 质置于玛瑙研钵中充分研磨后, 放入刚玉坩埚中在 300°C下预烧结 5h, 然后冷却 至室温, 再次充分研磨。 最后, 将再次研磨产物在 1300°C下煅烧 24h, 冷却至室 温, 研磨后即得 GCILOEULOSI^C^锡酸盐红色发光材料。 实施例 5, 制备 La sEuuSi^O?发光材料:
按化学计量比称取氧化镧 La203 0.2036g、 硝酸铕 Eu(N03)3'6H20 1.6728g、 氧化锡 SnO2 0.7535g、 助熔剂 ( 3% )硼酸 H3B03 0.0046g。 将所有物质置于玛瑙 研钵中充分研磨后, 放入刚玉坩埚中在 500 °C下预烧结 5h, 然后冷却至室温, 再 次充分研磨。 最后, 将再次研磨产物在 1200°C下煅烧 12h, 冷却至室温, 研磨后 即得 La sEuuSi^O?锡酸盐红色发光材料。 实施例 6, 制备 LauEu sSi^O?发光材料:
按化学计量比称取氧化镧 La203 0.6109g、 氧化铕 Eu203 0.2200g、 氢氧化锡 Sn(OH)2 0.7636g、 助熔剂 ( 3% )硼酸 H3B03 0.0046g。 将所有物质置于玛瑙研钵 中充分研磨后, 放入刚玉坩埚中在 400°C下预烧结 5h, 然后冷却至室温, 再次充 分研磨。 最后, 将再次研磨产物在 1400°C下煅烧 12h, 冷却至室温, 研磨后即得 LauEuo.sSi^C^锡酸盐红色发光材料。 具有上述化学结构的氧化物锡酸盐发光材料具有良好的电特性、 良好的稳 定性, 且抗电子轰击能力强, 可广泛应用于场发射发光器件等领域。 同时, 上述制备方法操作简单、 无污染、 工艺条件易控制、 制备温度低, 节约能源, 对设备要求低、 并且制得的发光材料稳定性好。 制备过程中通过在 混合料中加入助熔剂, 可以使反应更充分, 反应温度降低。 但并不能因此而理解为对本发明专利范围的限制。 应当指出的是, 对于本领域 的普通技术人员来说, 在不脱离本发明构思的前提下, 还可以做出若干变形和 改进, 这些都属于本发明的保护范围。 因此, 本发明专利的保护范围应以所附 权利要求为准。

Claims

权利要求书
1、 一种氧化物锡酸盐发光材料, 其特征在于, 化学通式为 Ln2_xEuxSn207, 其中, Ln为金属 Gd、 Y、 La中的任一种, x的取值范围为 0.1≤x≤1.5。
2、 一种氧化物锡酸盐发光材料的制备方法, 其特征在于, 该制备方法包括 如下步骤:
51、 根据化学通式 Ln2^EuxSn207中各元素的摩尔比, 提供 Ln化合物、 Eu 化合物、 Sn化合物的原料, 研磨混合均匀形成混合料; 其中, Ln为 Gd、 Y、 La中的任一种; 0.1<x<1.5;
52、 将所述混合料经 300-500°C下预烧 3-5h, 冷却至室温, 研磨成混合粉 体;
53、 将混合粉体于 1200-1400°C煅烧 l-24h, 冷却至室温, 研磨即得氧化物 锡酸盐发光材料。
3、 如权利要求 2氧化物锡酸盐发光材料的制备方法, 其特征在于, 所述 Ln 化合物为 Ln氧化物或 Ln硝酸盐。
4、 如权利要求 2氧化物锡酸盐发光材料的制备方法, 其特征在于, 所述 Eu 化合物为 Eu203或 Eu(N03)3
5、 如权利要求 2氧化物锡酸盐发光材料的制备方法, 其特征在于, 所述 Sn 化合物为 Sn02或 Sn(OH)2
6、 如权利要求 2氧化物锡酸盐发光材料的制备方法, 其特征在于, 步骤 S1 中, 还包括向原料混合物中添加助熔剂的步骤, 所述助熔剂的添加量为所述氧 化物锡酸盐发光材料中各元素总摩尔数的 1〜5%。
7、 如权利要求 6氧化物锡酸盐发光材料的制备方法, 其特征在于, 所述助 熔剂为 H3B03或氟化镁 MgF2
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