WO2012009845A1 - 一种发光材料及其制备方法 - Google Patents

一种发光材料及其制备方法 Download PDF

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WO2012009845A1
WO2012009845A1 PCT/CN2010/075254 CN2010075254W WO2012009845A1 WO 2012009845 A1 WO2012009845 A1 WO 2012009845A1 CN 2010075254 W CN2010075254 W CN 2010075254W WO 2012009845 A1 WO2012009845 A1 WO 2012009845A1
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luminescent material
source compound
geo
nay
material according
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PCT/CN2010/075254
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French (fr)
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周明杰
时朝璞
马文波
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海洋王照明科技股份有限公司
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Priority to JP2013518929A priority Critical patent/JP5667289B2/ja
Priority to EP10854875.1A priority patent/EP2597132B1/en
Priority to CN201080066839.5A priority patent/CN102906223B/zh
Priority to PCT/CN2010/075254 priority patent/WO2012009845A1/zh
Priority to US13/700,506 priority patent/US9034205B2/en
Publication of WO2012009845A1 publication Critical patent/WO2012009845A1/zh

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    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7783—Luminescent, 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
    • C09K11/7793—Germanates
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
    • C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
    • C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
    • C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
    • C09K11/7775—Germanates
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J1/00—Details of electrodes, of magnetic control means, of screens, or of the mounting or spacing thereof, common to two or more basic types of discharge tubes or lamps
    • H01J1/02—Main electrodes
    • H01J1/30—Cold cathodes, e.g. field-emissive cathode
    • H01J1/304—Field-emissive cathodes
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01J—ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
    • H01J31/00—Cathode ray tubes; Electron beam tubes
    • H01J31/08—Cathode ray tubes; Electron beam tubes having a screen on or from which an image or pattern is formed, picked up, converted, or stored
    • H01J31/10—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes
    • H01J31/12—Image or pattern display tubes, i.e. having electrical input and optical output; Flying-spot tubes for scanning purposes with luminescent screen
    • H01J31/123—Flat display tubes
    • H01J31/125—Flat display tubes provided with control means permitting the electron beam to reach selected parts of the screen, e.g. digital selection
    • H01J31/127—Flat display tubes provided with control means permitting the electron beam to reach selected parts of the screen, e.g. digital selection using large area or array sources, i.e. essentially a source for each pixel group
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B41/00—Circuit arrangements or apparatus for igniting or operating discharge lamps
    • H05B41/14—Circuit arrangements
    • H05B41/36—Controlling

Definitions

  • the invention belongs to the technical field of luminescent materials, and in particular relates to a luminescent material and a preparation method thereof.
  • Field emission display is a flat panel display newly developed in recent years. It belongs to low voltage cold cathode emission. This special emission feature gives FED Many different performances than other flat panel displays: low operating voltage (200 ⁇ 5000V), low power consumption, high brightness, thin, small size, light weight, good stability, long life, fast response, full color display, no Perspective limitations and compatibility with the environment.
  • the fluorescent materials used in field emission devices are mainly sulfide series, oxide series and sulfur oxide series phosphors used in conventional cathode ray tubes and projection television tubes.
  • the luminescence brightness is higher and has certain conductivity, but it is easily decomposed under the bombardment of large beam electron beams, releasing the elemental sulfur "poisoning" cathode tip and generating other
  • the precipitate covers the surface of the phosphor, which reduces the luminous efficiency of the phosphor and shortens the service life of the field emission device.
  • the oxide phosphor has good stability, but the luminous efficiency is not high enough, and the material is generally an insulator, and both properties have to be improved and improved.
  • the present invention provides a citrate luminescent material doped with a rare earth element, which has high conductivity, stability, and high luminous efficiency.
  • the mixed powder was subjected to a sintering treatment, and then cooled to room temperature and ground to obtain the above-mentioned luminescent material.
  • the luminescent material is doped with rare earth elements and sodium ions to form a ceric acid luminescent material containing rare earth elements, which effectively improves the stability and luminescent properties of the luminescent material. Moreover, due to the presence of sodium ions, the conductive property of the luminescent material is effectively improved; the presence of the rare earth element enables the luminescent material to selectively emit red, green, blue and other colors under the excitation of the cathode ray, which can be better
  • the invention is applied to a field emission device.
  • the luminescent materials are obtained by directly mixing and sintering the respective source components, thereby making the preparation process simple, the cost is low, and the invention has broad application prospects.
  • Example 1 is a luminescence spectrum of a luminescent material prepared in Example 2 of the present invention under excitation of a cathode ray at an acceleration voltage of 5 kV;
  • Example 2 is a luminescence spectrum of a luminescent material prepared in Example 5 of the present invention under excitation of a cathode ray at an acceleration voltage of 5 kV;
  • Example 3 is a luminescence spectrum of a luminescent material prepared in Example 6 of the present invention under excitation of a cathode ray at an acceleration voltage of 5 kV;
  • FIG. 4 is a flow chart of a method for preparing a luminescent material according to the present invention.
  • the luminescent material of the embodiment of the invention has the chemical formula: NaY 1-x Ln x GeO 4 , wherein Ln is a rare earth element, and x has a value ranging from 0 ⁇ x ⁇ 0.2.
  • the Ln includes one of Eu, Tb, Tm, Sm, Dy, and Bi;
  • the value range of x is preferably 0.001 ⁇ x ⁇ 0.15.
  • the luminescent material is doped with a rare earth element to form a strontium silicate material containing a rare earth element and a sodium ion, thereby effectively improving the stability and luminescent properties of the luminescent material, and appropriately adjusting the ratio of each element in the luminescent material, such as
  • NaY 1-x Ln x GeO 4 preferably has a value range of 0.001 ⁇ x ⁇ 0.15, and when Ln is preferably one of Eu, Tb, Tm, Sm, Dy, and Bi, it can be further improved.
  • the stability and luminous efficiency of the luminescent material is doped with a rare earth element to form a strontium silicate material containing a rare earth element and a sodium ion, thereby effectively improving the stability and luminescent properties of the luminescent material, and appropriately adjusting the ratio of each element in the luminescent material, such as
  • NaY 1-x Ln x GeO 4 preferably has a value range of 0.001 ⁇ x ⁇ 0.
  • the conductive property of the luminescent material is effectively improved; the presence of rare earth elements enables the luminescent material to emit red, green, blue, etc. under the excitation of a cathode ray.
  • Light of different colors such as a rare earth element containing Tm, Sm, Dy, Bi, etc., emits blue light, and the luminescent material containing a rare earth element such as Eu emits red light, and the luminescent material containing a rare earth element such as Tb emits green light. It can be preferably applied to field emission devices.
  • the preparation process comprises the following steps:
  • the mixed powder is subjected to a sintering treatment, and then cooled to room temperature and ground to obtain the luminescent material.
  • the source compound of Na is preferably at least one of Na carbonate, sodium oxalate, sodium acetate, sodium fluoride, sodium chloride, and sodium bromide;
  • the source compound is preferably at least one of an oxide, a nitrate, a carbonate, and an oxalate of Ln;
  • the source compound of Y is preferably an oxide, a nitrate, a carbonate or an oxalate of Y.
  • At least one of; the source compound of Ge is preferably an oxide of Ge.
  • the Ln preferably includes one of Eu, Tb, Tm, Sm, Dy, and Bi; and the value of x is preferably 0.001 ⁇ x ⁇ 0.15.
  • the respective source compounds are mixed and then ground to uniformly mix the respective source compounds.
  • the method of grinding can be ball milling or other methods of grinding commonly used in the art.
  • the sintering is performed in the presence of an air atmosphere, and the sintering temperature is preferably 900 to 1350 ° C, the time is preferably 2 to 20 h, and more preferably the temperature is 1100 to 1300 ° C, time. It is 2 ⁇ 10h.
  • the luminescent material product of the present embodiment obtained after sintering can also be ground into a powder.
  • the grinding method can be ball milling or other grinding methods commonly used in the art. In order to ensure that the molecular structure of the product is not destroyed, a ball milling method is preferably employed.
  • the luminescent materials are obtained by directly mixing and sintering the respective source compounds, thereby making the preparation process simple, the cost is low, and the production and application prospects are broad.
  • compositions of the luminescent materials and their preparation methods, as well as their properties and the like, are exemplified below by various embodiments.
  • the NaY 0.999 Sm 0.001 GeO 4 luminescent material of this example emits blue light under the excitation of a cathode ray.
  • the NaY 0.99 Bi 0.01 GeO 4 luminescent material of this example emits blue light under the excitation of a cathode ray.
  • the luminescence spectrum of the NaY 0.99 Bi 0.01 GeO 4 luminescent material prepared in this example under the excitation of cathode ray is shown in FIG. 1 , and the citrate luminescent material prepared in this embodiment has high luminescence efficiency and excellent luminescence property.
  • the weighed raw materials are ground and uniformly mixed in an agate mortar, and then placed in a corundum crucible, and the corundum crucible is placed in a high-temperature box furnace, and heated to 1350 ° C in an air atmosphere, and the calcination is performed under the conditions 2 After an hour, it was cooled to room temperature, and the cooled product was ground to obtain a NaY 0.8 Dy 0.2 GeO 4 luminescent material.
  • the NaY 0.8 Dy 0.2 GeO 4 luminescent material of this example emits blue light under the excitation of a cathode ray.
  • the NaY 0.99 Tm 0.01 GeO 4 luminescent material of this example emits blue light under the excitation of a cathode ray.
  • the NaY 0.95 Eu 0.05 GeO 4 luminescent material of this example emits red light under the excitation of a cathode ray.
  • the luminescence spectrum of the NaY 0.95 Eu 0.05 GeO 4 red luminescent material prepared by the embodiment of the present invention is excited by the cathode ray.
  • the bismuth silicate luminescent material prepared in the embodiment has high luminescence efficiency and excellent luminescence property. .
  • 0.4101 g of sodium acetate (CH 3 CO 2 Na), 0.4798 g of yttrium oxide (Y 2 O 3 ), 0.1402 g of lanthanum oxide (Tb 4 O 7 ), and 0.5230 g of cerium oxide (GeO 2 ) were weighed.
  • the prepared raw materials are ground and uniformly mixed in an agate mortar, and then placed in a corundum crucible.
  • the corundum crucible is placed in a high-temperature box furnace and heated to 1100 ° C in an air atmosphere. After the calcination for 10 hours under this condition, After cooling to room temperature, the cooled product was ground to obtain a NaY 0.85 Tb 0.15 GeO 4 luminescent material.
  • the NaY 0.85 Tb 0.15 GeO 4 luminescent material of this example emits green light under the excitation of a cathode ray.
  • the luminescence spectrum of the NaY 0.85 Tb 0.15 GeO 4 green luminescent material prepared by the embodiment of the present invention under the excitation of the cathode ray is shown in FIG. 3 , and the citrate luminescent material prepared in the embodiment has high luminescence efficiency and excellent luminescence property. .

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Description

一种发光材料及其制备方法 技术领域
本发明属于发光材料技术领域，具体涉及一种发光材料及其制备方法。
背景技术
场发射显示器（FED）是近几年新发展起来的一种平板显示器，属于低电压冷阴极发射，这种特殊的发射特点赋予FED 许多不同于其他平板显示器的优异性能：工作电压低（200～5000V）、功耗小、亮度高、薄、体积小、重量轻、稳定性好、寿命长、响应速度快、全彩显示、无视角限制和对环境的兼容性好等。
制备优良性能场发射器件的关键因素之一是高性能荧光粉体的制备。目前场发射器件所采用的荧光材料主要是一些用于传统阴极射线管和投影电视显像管的硫化物系列、氧化物系列和硫氧化物系列荧光粉。对于硫化物和硫氧化物系列荧光粉来说，发光亮度较高，且具有一定的导电性，但在大束流电子束的轰击下容易发生分解，放出单质硫“毒化”阴极针尖，并生成其他沉淀物覆盖在荧光粉表面，降低了荧光粉的发光效率，缩短了场发射器件的使用寿命。氧化物荧光粉稳定性能好，但发光效率不够高，并且材料一般为绝缘体，两者性能都有待改进和提高。
 技术问题
有鉴于此，本发明提供一种掺杂有稀土元素的锗酸盐发光材料，该发光材料的导电性强，稳定性和发光效率高。
以及，提供一种制备工艺简单、成本低的发光材料制备方法。
 技术解决方案
本发明解决上述技术问题所采用的技术方案是：
一种发光材料，其化学通式为：NaY1-xLnxGeO4，其中，Ln为稀土元素，x的取值范围为0＜x≤0.2。
以及，一种发光材料制备方法，其包括如下步骤：
按照化学通式NaY1-xLnxGeO4中各元素的化学计量比，称取Na的源化合物、Ln的源化合物、Y的源化合物、Ge的源化合物，其中，Ln为稀土元素，x的取值范围为0＜x≤0.2；
将所述Na的源化合物、Ln的源化合物、Y的源化合物、Ge的源化合物混合，研磨成混合粉体；
将混合粉体进行烧结处理，然后冷却至室温，研磨，得到所述的发光材料。
 有益效果
在上述发光材料及其制备方法中，该发光材料中掺杂了稀土元素和钠离子，构成含稀土元素的锗酸盐发光材料，有效提高了该发光材料的稳定和发光性能。而且，由于钠离子的存在，有效提高了该发光材料的导电性能；稀土元素的存在，使得该发光材料在阴极射线激发下可以选择发射红、绿、蓝等不同颜色的光，可以较好地应用于场发射器件中；在该发光材料制备方法中，将各源组分直接混合并烧结，即可获得发光材料，从而使得制备工艺简单、成本低，具有广阔的生产应用前景。
附图说明
下面将结合附图及实施例对本发明作进一步说明，附图中：
图1是本发明实施例2制备的发光材料在加速电压为5KV下的阴极射线激发下的发光光谱图；
图2是本发明实施例5制备的发光材料在加速电压为5KV下的阴极射线激发下的发光光谱图；
图3是本发明实施例6制备的发光材料在加速电压为5KV下的阴极射线激发下的发光光谱图；
图4为本发明发光材料制备方法流程图。
 本发明的实施方式
为了使本发明的目的、技术方案及优点更加清楚明白，以下结合附图及实施例，对本发明进行进一步详细说明。应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
本发明实施例发光材料，其化学通式为：NaY1-xLnxGeO4，其中，Ln为稀土元素，x的取值范围为0＜x≤0.2。
上述Ln优选为包含Eu、Tb、Tm、Sm、Dy、Bi中的一种； x的取值范围优选为0.001≤x≤0.15。
在上述发光材料中掺杂了稀土元素构成含稀土元素和钠离子的锗酸盐发光材料，有效提高了该发光材料的稳定和发光性能，当适当调整该发光材料中各元素的比例，如该发光材料化学通式NaY1-xLnxGeO4中x的取值范围优选为0.001≤x≤0.15，Ln优选为Eu、Tb、Tm、Sm、Dy、Bi中的一种时，能进一步提高该发光材料的稳定性和发光效率.而且，由于钠离子的存在，有效提高了该发光材料的导电性能；稀土元素的存在，使得该发光材料在阴极射线激发下可以发射红、绿、蓝等不同颜色的光，如含Tm、Sm、Dy、Bi等稀土元素的该发光材料发射蓝光，含Eu等稀土元素的该发光材料发射红光，含Tb等稀土元素的该发光材料发射绿光，可以较好地应用于场发射器件中。
以及，本发明发光材料制备方法，如图4所示，其制备工艺流程包括如下步骤：
S1. 按照化学通式NaY1-xLnxGeO4中各元素的化学计量比，称取Na的源化合物、Ln的源化合物、Y的源化合物、Ge的源化合物，其中，Ln为稀土元素，x的取值范围为0＜x≤0.2；
S2. 将所述Na的源化合物、Ln的源化合物、Y的源化合物、Ge的源化合物混合，研磨成混合粉体；
S3. 将混合粉体进行烧结处理，然后冷却至室温，研磨，得到所述的发光材料。
上述发光材料制备方法的S1步骤中，所述Na的源化合物优选为Na的碳酸盐、草酸钠、醋酸钠、氟化钠、氯化钠、溴化钠中的至少一种；所述Ln的源化合物优选为Ln的氧化物、硝酸盐、碳酸盐、草酸盐中的至少一种；所述Y的源化合物优选为Y的氧化物、硝酸盐、碳酸盐、草酸盐中的至少一种；所述Ge的源化合物优选为Ge的氧化物。
上述发光材料制备方法的S1步骤中，所述Ln优选包含Eu、Tb、Tm、Sm、Dy、Bi中的一种；所述x的取值范围优选为0.001≤x≤0.15。
上述发光材料制备方法的S2步骤中，优选方案是将各源化合物混合后，进行研磨，使各源化合物充分混合均匀。研磨的方式可以是球磨或其他本技术领域常用的研磨方式。
上述发光材料制备方法的S3步骤中，所述烧结是在空气气氛存在条件下进行的，烧结的温度优选为900~1350℃，时间优选为2~20h，更优选为温度1100~1300℃，时间为2~10h。烧结后所得到的本实施例发光材料产物还可以进行研磨成粉，研磨的方式可以是球磨或其他本技术领域常用的研磨方式，为了保证该产物的分子结构不被破坏，优选采用球磨方式。
在该发光材料制备方法中，将各源化合物直接混合并烧结，即可获得发光材料，从而使得制备工艺简单、成本低，具有广阔的生产应用前景。
以下通过多个实施例来举例说明发光材料的不同组成及其制备方法，以及其性能等方面。
实施例1
NaY0.999Sm0.001GeO4发光材料及其制备
首先称取溴化钠(NaBr) 0.5145g、硝酸钇(Y(NO3)3) 1.3732g、硝酸钐(Sm(NO3)3) 0.0017g、二氧化锗(GeO2) 0.5230g，然后将称量好的原料在玛瑙研钵中研磨混合均匀后装入刚玉坩埚中，将该刚玉坩埚放入高温箱式炉中，在空气气氛下升温到900℃，在此条件下保温烧结20小时后，再冷却到室温，将冷却后的产物研磨，即可得到NaY0.999Sm0.001GeO4蓝光发光材料。本实施例的NaY0.999Sm0.001GeO4发光材料在阴极射线激发下发射蓝光。
实施例2
NaY0.99Bi0.01GeO4发光材料
首先称取氟化钠(NaF) 0.2100g、氧化钇(Y2O3) 0.5589g、氧化铋(Bi2O3) 0.0116g、二氧化锗(GeO2) 0.5230g，然后将称量好的原料在玛瑙研钵中研磨混合均匀后装入刚玉坩埚中，将该刚玉坩埚放入高温箱式炉中，在空气气氛下升温到1200℃，在此条件下保温烧结5小时后，再冷却到室温，将冷却后的产物研磨，即可得到NaY0.99Bi0.01GeO4发光材料。本实施例的NaY0.99Bi0.01GeO4发光材料在阴极射线激发下发射蓝光。本实施例制备的NaY0.99Bi0.01GeO4发光材料在阴极射线激发下的发光光谱图如图1所示，本实施例制备的锗酸盐发光材料发光效率高，具有优良的发光性能。
实施例3
NaY0.8Dy0.2GeO4发光材料
首先称取氯化钠(NaCl) 0.2922g、碳酸钇(Y2(CO3)3) 0.7156g、碳酸镝(Dy2(CO3)3) 0.2525g、二氧化锗(GeO2) 0.5230g，然后将称量好的原料在玛瑙研钵中研磨混合均匀后装入刚玉坩埚中，将该刚玉坩埚放入高温箱式炉中，在空气气氛下升温到1350℃，在此条件下保温煅烧2小时后，再冷却到室温，将冷却后的产物研磨，即可得到NaY0.8Dy0.2GeO4发光材料。本实施例的NaY0.8Dy0.2GeO4发光材料在阴极射线激发下发射蓝光。
实施例4
NaY0.99Tm0.01GeO4蓝光发光材料
首先称取草酸钠(Na2C2O4) 0.335g、草酸钇(Y2(C2O4)3) 1.0936g、草酸铥(Tm2(C2O4)3) 0.0150g、二氧化锗(GeO2) 0.5230g，然后将称量好的原料在玛瑙研钵中研磨混合均匀后装入刚玉坩埚中，将该刚玉坩埚放入高温箱式炉中，在空气气氛下升温到1300℃，在此条件下保温煅烧6小时后，再冷却到室温，将冷却后的产物研磨，即可得到NaY0.99Tm0.01GeO4发光材料。本实施例的NaY0.99Tm0.01GeO4发光材料在阴极射线激发下发射蓝光。
实施例5
NaY0.95Eu0.05GeO4发光材料
首先称取碳酸钠(Na2CO3) 0.2650g、氧化钇(Y2O3) 0.5363g、氧化铕(Eu2O3) 0.0440g、二氧化锗(GeO2) 0.5230g，然后将称量好的原料在玛瑙研钵中研磨混合均匀后装入刚玉坩埚中，将该刚玉坩埚放入高温箱式炉中，在空气气氛下升温到1200℃，在此条件下保温烧结5小时后，再冷却到室温，将冷却后的产物研磨，即可得到NaY0.95Eu0.05GeO4红光发光材料。本实施例的NaY0.95Eu0.05GeO4发光材料在阴极射线激发下发射红光。本发明实施例制备的NaY0.95Eu0.05GeO4红光发光材料在阴极射线激发下的发光光谱图如图2所示，本实施例制备的锗酸盐发光材料发光效率高，具有优良的发光性能。
实施例6
NaY0.85Tb0.15GeO4发光材料
首先称取醋酸钠(CH3CO2Na) 0.4101g、氧化钇(Y2O3) 0.4798g、氧化铽(Tb4O7) 0.1402g、二氧化锗(GeO2) 0.5230g，然后将称量好的原料在玛瑙研钵中研磨混合均匀后装入刚玉坩埚中，将该刚玉坩埚放入高温箱式炉中，在空气气氛下升温到1100℃，在此条件下保温煅烧10小时后，再冷却到室温，将冷却后的产物研磨，即可得到NaY0.85Tb0.15GeO4发光材料。本实施例的NaY0.85Tb0.15GeO4发光材料在阴极射线激发下发射绿光。本发明实施例制备的NaY0.85Tb0.15GeO4绿光发光材料在阴极射线激发下的发光光谱图如图3所示，本实施例制备的锗酸盐发光材料发光效率高，具有优良的发光性能。
以上所述仅为本发明的较佳实施例而已，并不用以限制本发明，凡在本发明的精神和原则之内所作的任何修改、等同替换和改进等，均应包含在本发明的保护范围之内。

Claims (10)

  1. 一种发光材料，其化学通式为：NaY1-xLnxGeO4，其中，Ln为稀土元素，x的取值范围为0＜x≤0.2。
  2. 如权利要求1所述的发光材料，其特征在于：所述Ln包含Eu、Tb、Tm、Sm、Dy、Bi中的一种。
  3. 如权利要求1所述的发光材料，其特征在于：所述x的取值范围为0.001≤x≤0.15。
  4. 一种发光材料制备方法，其包括如下步骤：
    按照化学通式NaY1-xLnxGeO4中各元素的化学计量比，称取Na的源化合物、Ln的源化合物、Y的源化合物、Ge的源化合物，其中，Ln为稀土元素，x的取值范围为0＜x≤0.2；
    将所述Na的源化合物、Ln的源化合物、Y的源化合物、Ge的源化合物混合，研磨成混合粉体；
    将混合粉体进行烧结处理，然后冷却至室温，研磨，得到所述的发光材料。
  5. 如权利要求4所述的发光材料制备方法，其特征在于：
    所述Na的源化合物为Na的碳酸盐、草酸钠、醋酸钠、氟化钠、氯化钠、溴化钠中的至少一种；
    所述Ln的源化合物为Ln的氧化物、硝酸盐、碳酸盐、草酸盐中的至少一种；
    所述Y的源化合物为Y的氧化物、硝酸盐、碳酸盐、草酸盐中的至少一种；
    所述Ge的源化合物为Ge的氧化物。
  6. 如权利要求4所述的发光材料制备方法，其特征在于：所述烧结的温度为900~1350℃，时间为2~20h。
  7. 如权利要求4或6所述的发光材料制备方法，其特征在于：所述烧结的温度为1100~1300℃，时间为2~10h。
  8. 如权利要求4所述的发光材料制备方法，其特征在于：所述Ln包含Eu、Tb、Tm、Sm、Dy、Bi中的一种。
  9. 如权利要求4所述的发光材料制备方法，其特征在于：所述x的取值范围为0.001≤x≤0.15。
  10. 如权利要求4所述的发光材料制备方法，其特征在于：所述烧结处理是在空气气氛存在条件下进行的。
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