WO2020015247A1 - 一种硼酸盐荧光粉及其制备方法 - Google Patents

一种硼酸盐荧光粉及其制备方法 Download PDF

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WO2020015247A1
WO2020015247A1 PCT/CN2018/113306 CN2018113306W WO2020015247A1 WO 2020015247 A1 WO2020015247 A1 WO 2020015247A1 CN 2018113306 W CN2018113306 W CN 2018113306W WO 2020015247 A1 WO2020015247 A1 WO 2020015247A1
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compound containing
mixture
phosphor
heat treatment
chemical formula
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PCT/CN2018/113306
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English (en)
French (fr)
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高远
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武汉华星光电半导体显示技术有限公司
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Priority to US16/621,263 priority Critical patent/US11306247B2/en
Publication of WO2020015247A1 publication Critical patent/WO2020015247A1/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
    • C09K11/7797—Borates
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B20/00—Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Definitions

  • the invention relates to the field of making phosphors, in particular to a borate phosphor and a preparation method thereof.
  • the technology for realizing white LED is mainly phosphor conversion technology.
  • phosphor conversion technology There are two main ways of phosphor conversion technology.
  • One way is to use blue LEDs to excite yellow phosphors.
  • its light emission spectrum is mainly green and yellow components, and the red component is too small, which leads to the synthesis of white LEDs.
  • the color rendering index is low.
  • blue light directly participates in the formation of white light, and blue light is harmful to the human eye;
  • another way is to use the three primary color phosphors excited by ultraviolet or near-ultraviolet to synthesize white LEDs.
  • the color stability of white LEDs is very stable.
  • the red phosphor is very important for the synthesis of white LEDs.
  • the Eu3 + (positive trivalent europium ion) in the existing red phosphors absorbs near-ultraviolet light when the 4f-4f transition occurs. Weak, the luminous efficiency is very low.
  • the invention provides a borate phosphor, which can solve the problem of low luminous efficiency of the existing red phosphor.
  • the invention provides a method for preparing a borate phosphor.
  • the chemical formula of the phosphor is Ba 2-n Sr n Lu 5-xymz L m Ce x Tb y Eu z B 5 O 17 , where L is One or any combination of elements Gd, La, Sc, the x, the y, the z, the m, and the n are all mole fractions, the x, the y, the z,
  • the value ranges of m and n are: 0.001 ⁇ x ⁇ 0.3, 0.001 ⁇ y ⁇ 2, 0.01 ⁇ z ⁇ 0.3, 0 ⁇ m ⁇ 1, 0 ⁇ n ⁇ 0.5, and the preparation method includes:
  • step S10 ten raw materials A, B, C, D, E, F, G, H, I, and J are weighed, and the ten raw materials are mixed and ground to obtain a first mixture.
  • A is a compound containing Ba 2+
  • B is a compound containing Ce 3+
  • C is a compound containing Tb 3+
  • D is a compound containing Eu 3+
  • E is a compound containing B 3+ F is a compound containing Sr 2+
  • G is a compound containing La 3+
  • H is a compound containing Gd 3+
  • I is a compound containing Lu 3+
  • Step S20 performing a first heat treatment on the first mixture under a condition of a reducing gas to obtain a second mixture
  • step S30 the second mixture is subjected to a second heat treatment under the condition of a reducing gas, and after cooling and grinding, a chemical formula of Ba 2-n Sr n Lu 5-xymz L m Ce x Tb y is obtained.
  • the phosphor of Eu z B 5 O 17 wherein the reducing gas is carbon monoxide or hydrogen.
  • any one of the A, the B, the C, the D, the F, the G, the H, the I, and the J It contains at most one of Ba 2+ , Sr 2+ , Lu 3+ , Ce 3+ , Tb 3+ , Eu 3+ , La 3+ , Gd 3+ , Sc 3+ .
  • any one of the A, the B, the C, the D, the F, the G, the H, the I, and the J It is one or any combination of oxide, carbonate, nitrate, and halide.
  • the temperature of the first heat treatment is 350 ° C. to 600 ° C.
  • the time of the first heat treatment is 1 to 6 hours.
  • the temperature of the second heat treatment is 1000 ° C. to 1300 ° C., and the time of the second heat treatment is 2 to 24 hours.
  • the invention also provides a borate phosphor, the chemical formula of which is: Ba 2-n Sr n Lu 5-xymz L m Ce x Tb y Eu z B 5 O 17 , wherein the L Is one or any combination of the elements Gd, La, and Sc, the x, the y, the z, the m, and the n are all mole fractions, and the x, the y, and the z
  • the value ranges of m, n are: 0 ⁇ x ⁇ 0.6, 0 ⁇ y ⁇ 3, 0 ⁇ z ⁇ 0.4, 0 ⁇ m ⁇ 1, 0 ⁇ n ⁇ 0.5.
  • the ranges of the values of x, y, and z are: 0.001 ⁇ x ⁇ 0.3, 0.001 ⁇ y ⁇ 2, and 0.01 ⁇ z ⁇ 0.3.
  • the present invention provides another method for preparing a borate phosphor.
  • the chemical formula of the phosphor is Ba 2-n Sr n Lu 5-xymz L m Ce x Tb y Eu z B 5 O 17.
  • the L Is one or any combination of the elements Gd, La, and Sc, the x, the y, the z, the m, and the n are all mole fractions, and the x, the y, and the z
  • the value ranges of m and n are: 0 ⁇ x ⁇ 0.6, 0 ⁇ y ⁇ 3, 0 ⁇ z ⁇ 0.4, 0 ⁇ m ⁇ 1, 0 ⁇ n ⁇ 0.5, and the preparation method includes :
  • step S10 ten raw materials A, B, C, D, E, F, G, H, I, and J are weighed, and the ten raw materials are mixed and ground to obtain a first mixture.
  • the A is a compound containing Ba 2+
  • the B is a compound containing Ce 3+
  • the C is a compound containing Tb 3+
  • the D is a compound containing Eu 3+
  • the E is a compound containing B 3+ compounds
  • the F is a compound containing Sr 2+
  • the G is a compound containing La 3+
  • the H is a compound containing Gd 3+
  • the I is a compound containing Lu 3+
  • Said J is a compound containing Sc 3+ ;
  • Step S20 performing a first heat treatment on the first mixture under a condition of a reducing gas to obtain a second mixture
  • step S30 the second mixture is subjected to a second heat treatment under the condition of a reducing gas, and after cooling and grinding, a chemical formula of Ba 2-n Sr n Lu 5-xymz L m Ce x Tb y is obtained.
  • the phosphor of Eu z B 5 O 17 is obtained.
  • the ranges of the values of x, y, and z are: 0.001 ⁇ x ⁇ 0.3, 0.001 ⁇ y ⁇ 2, and 0.01 ⁇ z ⁇ 0.3.
  • any one of the A, the B, the C, the D, the F, the G, the H, the I, and the J It contains at most one of Ba 2+ , Sr 2+ , Lu 3+ , Ce 3+ , Tb 3+ , Eu 3+ , La 3+ , Gd 3+ , Sc 3+ .
  • any one of the A, the B, the C, the D, the F, the G, the H, the I, and the J It is one or any combination of oxide, carbonate, nitrate, and halide.
  • the reducing gas is carbon monoxide or hydrogen.
  • the temperature of the first heat treatment is 350 ° C. to 600 ° C.
  • the time of the first heat treatment is 1 to 6 hours.
  • the temperature of the second heat treatment is 1000 ° C. to 1300 ° C., and the time of the second heat treatment is 2 to 24 hours.
  • the beneficial effects of the present invention are: the cerium, europium and thallium co-doped borate phosphors provided by the present invention have stable crystal phases, high luminous efficiency, and good thermal stability, and can be used to synthesize white LEDs for ultraviolet LEDs or near-ultraviolet LEDs
  • the method for preparing a borate phosphor provided by the present invention has simple process, easy operation and no pollution.
  • FIG. 1 is a flowchart of steps in a manufacturing method according to Embodiment 1 of the present invention
  • FIG. 2 is an x-ray diffraction spectrum of the phosphor according to the first embodiment of the present invention
  • FIG. 3 is an excitation spectrum diagram of the phosphor according to the first embodiment of the present invention.
  • FIG. 4 is an emission spectrum chart of the phosphor according to the first embodiment of the present invention.
  • the present invention is directed to existing red phosphors. Because Eu 3+ in the existing red phosphors undergoes a 4f-4f transition in the near-ultraviolet LED, the absorption is very weak, and the luminous efficiency is very low. When white and blue phosphors are used to synthesize white LEDs, the problems of unstable colors and low luminous efficiency occur, which further affects the technical problems of the display. This embodiment can solve this defect.
  • the chemical formula of the phosphor provided in this embodiment is Ba 2 Lu 2.85 Ce 0.05 Tb 2 Eu 0.1 B 5 O 17 , and the preparation method includes:
  • Step S10 Weigh out ten raw materials A, B, C, D, E, F, G, H, I, and J, and mix and grind the ten raw materials to obtain a first mixture;
  • A is BaCO 3 (barium carbonate), B is CeO 2 (cerium dioxide), C is Tb 4 O 7 (hafnium oxide), and D is Eu 2 O 3 (dioxide Ii), E is H 3 BO 3 (boric acid), F is SrCO 3 (strontium carbonate), G is La 2 O 3 (lanthanum trioxide), and H is Gd 2 O 3 ( Hafnium oxide), I is Lu 2 O 3 (hafnium oxide), J is Sc 2 O 3 (hafnium oxide), the purity of the BaCO 3 and the SrCO 3 is more than 99.7%, and the H 3 The purity of BO 3 is 99.8% or more, the CeO 2 , the Tb 4 O 7 , the La 2 O 3 , the Lu 2 O 3 , the Sc 2 O 3 , the Gd 2 O 3 and all The purity of Eu 2 O 3 is above 99%;
  • the ratio is 2: 1.425: 0.05: 0.5: 0.05: 5, the mass of H 3 BO 3 is weighed to be 0.3092g, and other raw materials are weighed according to the molar fraction ratio, as shown in Table 1.
  • the A, the B, the C, the D, the E, and the I are ground in an agate mortar and mixed uniformly to obtain the first mixture.
  • the first mixture is placed in a corundum crucible and covered;
  • Step S20 performing a first heat treatment on the first mixture under a condition of a reducing gas to obtain a second mixture
  • the step S20 includes the following steps:
  • step S201 the high-temperature furnace to be used is evacuated and then filled with gas CO.
  • the purpose of the vacuum is to prevent the air and moisture in the high-temperature furnace from affecting the reaction.
  • the purpose of the CO charging is to provide reducing conditions for the reaction so that Performing a redox reaction between the reactant and the CO;
  • step S202 the corundum crucible is placed in the high temperature furnace filled with CO gas, and the first sintering is performed at 450 ° C.
  • the first sintering time is 4 hours to obtain the second mixture. ;
  • step S30 the second mixture is subjected to a second heat treatment under the condition of a reducing gas, and after cooling and grinding, the fluorescent formula of Ba 2 Lu 2.85 Ce 0.05 Tb 2 Eu 0.1 B 5 O 17 is obtained . powder;
  • the temperature is increased to 1200 ° C, and the temperature is kept constant, and the second sintering of the second mixture is continued, and the second sintering time is 10 hours, and the natural cooling is waited for After that, and appropriate grinding is performed to obtain the phosphor;
  • sintering is a high-temperature solid-phase reaction process, and the sintering is to transform a powdery material into a dense body.
  • FIG. 2 is a comparison diagram of an x-ray diffraction spectrum of the phosphor and an x-ray diffraction spectrum of a standard substance in this embodiment, where the x-ray diffraction spectrum of the phosphor is located in the figure
  • the upper part of the x-ray diffraction spectrum of the standard substance it can be seen from the figure that the position of the diffraction peak (upper row) of the phosphor prepared in this example is almost the same as that of the control peak of the diffraction spectrum (lower row) of the standard substance.
  • FIG. 3 is an excitation spectrum diagram of the phosphor of the selected embodiment. It can be seen from the figure that the phosphor has a high luminous intensity under the excitation of 230-380 nm excitation light.
  • the emission spectrum chart of the phosphor in the embodiment of FIG. 4 shows that the peak wavelength of the emission spectrum of the phosphor is 617 nanometers at the wavelength of 347 nanometers excitation light.
  • the preparation method provided in this embodiment can achieve red light emission with a main peak at 617 nanometers under 230-380 nanometer excitation, and has high color purity.
  • the chemical formula of the phosphor in this embodiment is Ba 2 Lu 4.898 Ce 0.001 Tb 0.001 Eu 0.1 B 5 O 17.
  • the method for preparing the phosphor in this embodiment includes:
  • Step S10 Weigh out ten raw materials A, B, C, D, E, F, G, H, I, and J, and mix and grind the ten raw materials to obtain a first mixture;
  • A is BaCO 3 (barium carbonate), B is CeO 2 (cerium dioxide), C is Tb 4 O 7 (hafnium oxide), and D is Eu 2 O 3 (dioxide Ii), E is H 3 BO 3 (boric acid), F is SrCO 3 (strontium carbonate), G is La 2 O 3 (lanthanum trioxide), and H is Gd 2 O 3 ( Hafnium oxide), I is Lu 2 O 3 (hafnium oxide), J is Sc 2 O 3 (hafnium oxide), the purity of the BaCO 3 and the SrCO 3 is more than 99.7%, and the H 3 The purity of BO 3 is 99.8% or more, the CeO 2 , the Tb 4 O 7 , the La 2 O 3 , the Lu 2 O 3 , the Sc 2 O 3 , the Gd 2 O 3 and all The purity of Eu 2 O 3 is above 99%;
  • the ratio is 2: 2.449: 0.001: 0.00025: 0.05: 5, the mass of H 3 BO 3 is weighed to be 0.3092g, and other raw materials are weighed according to the molar fraction ratio, as shown in Table 2.
  • the A, the B, the C, the D, the E, and the I are ground in an agate mortar and mixed uniformly to obtain the first mixture.
  • the first mixture is placed in a corundum crucible and covered;
  • Step S20 performing a first heat treatment on the first mixture under a condition of a reducing gas to obtain a second mixture
  • the step S20 includes the following steps:
  • step S201 the high-temperature furnace to be used is evacuated and then filled with gas CO.
  • the purpose of the vacuum is to prevent the air and moisture in the high-temperature furnace from affecting the reaction.
  • the purpose of the CO charging is to provide reducing conditions for the reaction so that Performing a redox reaction between the reactant and the CO;
  • step S202 the corundum crucible is placed in the high temperature furnace filled with CO gas, and the first sintering is performed at 480 ° C.
  • the first sintering time is 4 hours to obtain the second mixture. ;
  • step S30 the second mixture is subjected to a second heat treatment under the condition of a reducing gas. After cooling and grinding, the fluorescent formula of Ba 2 Lu 4.898 Ce 0.001 Tb 0.001 Eu 0.1 B 5 O 17 is obtained . powder;
  • the temperature is increased to 1200 ° C, and the temperature is kept constant, and the second sintering of the second mixture is continued, and the second sintering time is 10 hours, and the natural cooling is waited for After that, and appropriate grinding is performed to obtain the phosphor;
  • sintering is a high-temperature solid-phase reaction process, and the sintering is to transform a powdery material into a dense body.
  • the x-ray diffraction spectrum, excitation spectrum, and emission spectrum of the phosphor of this preferred embodiment are similar to those of the first embodiment, but the emission light intensity of Ce 3+ and Tb 3+ in this embodiment in the red light region is weaker than that ⁇ ⁇ 1 ⁇ The first embodiment.
  • the chemical formula of the phosphor in this embodiment is Ba 1.5 Sr 0.5 Lu 4.898 Ce 0.001 Tb 0.001 Eu 0.1 B 5 O 17.
  • the method for preparing the phosphor in this embodiment includes:
  • Step S10 Weigh out ten raw materials A, B, C, D, E, F, G, H, I, and J, and mix and grind the ten raw materials to obtain a first mixture;
  • A is BaCO 3 (barium carbonate), B is CeO 2 (cerium dioxide), C is Tb 4 O 7 (hafnium oxide), and D is Eu 2 O 3 (dioxide Ii), E is H 3 BO 3 (boric acid), F is SrCO 3 (strontium carbonate), G is La 2 O 3 (lanthanum trioxide), and H is Gd 2 O 3 ( Hafnium oxide), I is Lu 2 O 3 (hafnium oxide), J is Sc 2 O 3 (hafnium oxide), the purity of the BaCO 3 and the SrCO 3 is more than 99.7%, and the H 3 The purity of BO 3 is 99.8% or more, the CeO 2 , the Tb 4 O 7 , the La 2 O 3 , the Lu 2 O 3 , the Sc 2 O 3 , the Gd 2 O 3 and all The purity of Eu 2 O 3 is above 99%;
  • the molar fraction ratio of BO 3 is 1.5: 0.5: 2.449: 0.001: 0.00025: 0.05: 5.
  • the mass of H 3 BO 3 is weighed to 0.3092 g. Other raw materials are weighed according to the molar fraction ratio, as shown in Table 3.
  • the A, the B, the C, the D, the E, the F, and the I are ground in an agate mortar, and are mixed uniformly to obtain the first A mixture, placing the first mixture in a corundum crucible and capping;
  • Step S20 performing a first heat treatment on the first mixture under a condition of a reducing gas to obtain a second mixture
  • the step S20 includes the following steps:
  • step S201 the high-temperature furnace to be used is evacuated and then filled with gas CO.
  • the purpose of the vacuum is to prevent the air and moisture in the high-temperature furnace from affecting the reaction.
  • the purpose of the CO charging is to provide reducing conditions for the reaction so that Performing a redox reaction between the reactant and the CO;
  • step S202 the corundum crucible is placed in the high temperature furnace filled with CO gas, and the first sintering is performed at 460 ° C.
  • the first sintering time is 4 hours to obtain the second mixture. ;
  • step S30 the second mixture is subjected to a second heat treatment under the condition of a reducing gas. After cooling and grinding, a chemical formula of Ba 1.5 Sr 0.5 Lu 4.898 Ce 0.001 Tb 0.001 Eu 0.1 B 5 O 17 is obtained. Mentioned phosphor;
  • the temperature is increased to 1200 ° C, and the temperature is maintained constant, and the second sintering of the second mixture is continued, and the second sintering time is 8 hours, and then the natural cooling After that, and appropriate grinding is performed to obtain the phosphor;
  • sintering is a high-temperature solid-phase reaction process, and the sintering is to transform a powdery material into a dense body.
  • the x-ray diffraction spectrum, excitation spectrum, and emission spectrum of the phosphor of this embodiment are similar to those of the first embodiment, but the emission light intensity of Ce 3+ and Tb 3+ in the red light region in this embodiment are weaker than those in the red light region.
  • the chemical formula of the phosphor in this embodiment is Ba 2 Lu 1.85 La 1.0 Ce 0.05 Tb 2 Eu 0.1 B 5 O 17.
  • the method for preparing the phosphor in this embodiment includes:
  • Step S10 Weigh out ten raw materials A, B, C, D, E, F, G, H, I, and J, and mix and grind the ten raw materials to obtain a first mixture;
  • A is BaCO 3 (barium carbonate), B is CeO 2 (cerium dioxide), C is Tb 4 O 7 (hafnium oxide), and D is Eu 2 O 3 (dioxide Ii), E is H 3 BO 3 (boric acid), F is SrCO 3 (strontium carbonate), G is La 2 O 3 (lanthanum trioxide), and H is Gd 2 O 3 ( Hafnium oxide), I is Lu 2 O 3 (hafnium oxide), J is Sc 2 O 3 (hafnium oxide), the purity of the BaCO 3 and the SrCO 3 is more than 99.7%, and the H 3 The purity of BO 3 is 99.8% or more, the CeO 2 , the Tb 4 O 7 , the La 2 O 3 , the Lu 2 O 3 , the Sc 2 O 3 , the Gd 2 O 3 and all The purity of Eu 2 O 3 is above 99%;
  • the molar fraction ratio of H 3 BO 3 is 2: 0.925: 0.5: 0.05: 0.5: 0.05: 5, the mass of H 3 BO 3 is weighed to 0.3092g, and other raw materials are weighed according to the molar fraction ratio, as shown in Table 4.
  • the A, the B, the C, the D, the E, the G, and the I are ground in an agate mortar and mixed, and the first A mixture, placing the first mixture in a corundum crucible and capping;
  • Step S20 performing a first heat treatment on the first mixture under a condition of a reducing gas to obtain a second mixture
  • the step S20 includes the following steps:
  • step S201 the high-temperature furnace to be used is evacuated and then filled with gas CO.
  • the purpose of the vacuum is to prevent the air and moisture in the high-temperature furnace from affecting the reaction.
  • the purpose of the CO charging is to provide reducing conditions for the reaction so that Performing a redox reaction between the reactant and the CO;
  • step S202 the corundum crucible is placed in the high temperature furnace filled with CO gas, and the first sintering is performed at 450 ° C.
  • the first sintering time is 4 hours to obtain the second mixture. ;
  • step S30 the second mixture is subjected to a second heat treatment under the condition of a reducing gas. After cooling and grinding, a chemical formula of Ba 2 Lu 1.85 La 1.0 Ce 0.05 Tb 2 Eu 0.1 B 5 O 17 is obtained.
  • the temperature is increased to 1190 ° C, and the temperature is maintained constant, and the second sintering of the second mixture is continued, and the second sintering time is 14 hours, and the natural cooling is waited for After that, and appropriate grinding is performed to obtain the phosphor;
  • sintering is a high-temperature solid-phase reaction process, and the sintering is to transform a powdery material into a dense body.
  • the x-ray diffraction spectrum, excitation spectrum, and emission spectrum of the phosphor of the embodiment are similar to those of the first embodiment, but the emitted light intensity of Ce 3+ and Tb 3+ in the red light region in this embodiment are weaker than those in the implementation.
  • Example 1 The x-ray diffraction spectrum, excitation spectrum, and emission spectrum of the phosphor of the embodiment are similar to those of the first embodiment, but the emitted light intensity of Ce 3+ and Tb 3+ in the red light region in this embodiment are weaker than those in the implementation.
  • Example 1 The x-ray diffraction spectrum, excitation spectrum, and emission spectrum of the phosphor of the embodiment are similar to those of the first embodiment, but the emitted light intensity of Ce 3+ and Tb 3+ in the red light region in this embodiment are weaker than those in the implementation.
  • Example 1 The x-ray diffraction spectrum, excitation spectrum, and emission spectrum of the phosphor of the embodiment are similar to those of the first embodiment, but the
  • the chemical formula of the phosphor in this embodiment is Ba 2 Lu 1.85 Gd 1.0 Ce 0.05 Tb 2 Eu 0.1 B 5 O 17.
  • the method for preparing the phosphor in this embodiment includes:
  • Step S10 Weigh out ten raw materials A, B, C, D, E, F, G, H, I, and J, and mix and grind the ten raw materials to obtain a first mixture;
  • A is BaCO 3 (barium carbonate), B is CeO 2 (cerium dioxide), C is Tb 4 O 7 (hafnium oxide), and D is Eu 2 O 3 (dioxide Ii), E is H 3 BO 3 (boric acid), F is SrCO 3 (strontium carbonate), G is La 2 O 3 (lanthanum trioxide), and H is Gd 2 O 3 ( Hafnium oxide), I is Lu 2 O 3 (hafnium oxide), J is Sc 2 O 3 (hafnium oxide), the purity of the BaCO 3 and the SrCO 3 is more than 99.7%, and the H 3 The purity of BO 3 is 99.8% or more, the CeO 2 , the Tb 4 O 7 , the La 2 O 3 , the Lu 2 O 3 , the Sc 2 O 3 , the Gd 2 O 3 and all The purity of Eu 2 O 3 is above 99%;
  • the molar fraction ratio of H 3 BO 3 is 2: 0.925: 0.5: 0.05: 0.5: 0.05: 5.
  • the mass of H 3 BO 3 is weighed to 0.3092 g. Other raw materials are weighed according to the molar fraction ratio, as shown in Table 5.
  • the A, the B, the C, the D, the E, the H, and the I are ground in an agate mortar, and are mixed uniformly to obtain the first A mixture, placing the first mixture in a corundum crucible and capping;
  • Step S20 performing a first heat treatment on the first mixture under a condition of a reducing gas to obtain a second mixture
  • the step S20 includes the following steps:
  • step S201 the high-temperature furnace to be used is evacuated and then filled with gas CO.
  • the purpose of the vacuum is to prevent the air and moisture in the high-temperature furnace from affecting the reaction.
  • the purpose of the CO charging is to provide reducing conditions for the reaction so that Performing a redox reaction between the reactant and the CO;
  • step S202 the corundum crucible is placed in the high temperature furnace filled with CO gas, and the first sintering is performed at 450 ° C.
  • the first sintering time is 4 hours to obtain the second mixture. ;
  • step S30 the second mixture is subjected to a second heat treatment under the condition of a reducing gas. After cooling and grinding, a chemical formula of Ba 2 Lu 1.85 Gd 1.0 Ce 0.05 Tb 2 Eu 0.1 B 5 O 17 is obtained. Mentioned phosphor;
  • the temperature is increased to 1200 ° C, and the temperature is kept constant, and the second sintering of the second mixture is continued, and the second sintering time is 10 hours, and the natural cooling is waited for After that, and appropriate grinding is performed to obtain the phosphor;
  • sintering is a high-temperature solid-phase reaction process, and the sintering is to transform a powdery material into a dense body.
  • the x-ray diffraction spectrum, excitation spectrum, and emission spectrum of the phosphor of this embodiment are similar to those of the first embodiment, but the emission light intensity of Ce 3+ and Tb 3+ in the red light region in this embodiment are weaker than those in the red light region.
  • the chemical formula of the phosphor in this embodiment is Ba 2 Lu 1.35 Gd 1.5 Ce 0.05 Tb 2 Eu 0.1 B 5 O 17.
  • the method for preparing the phosphor in this embodiment includes:
  • Step S10 Weigh out ten raw materials A, B, C, D, E, F, G, H, I, and J, and mix and grind the ten raw materials to obtain a first mixture;
  • A is BaCO 3 (barium carbonate), B is CeO 2 (cerium dioxide), C is Tb 4 O 7 (hafnium oxide), and D is Eu 2 O 3 (dioxide Ii), E is H 3 BO 3 (boric acid), F is SrCO 3 (strontium carbonate), G is La 2 O 3 (lanthanum trioxide), and H is Gd 2 O 3 ( Hafnium oxide), I is Lu 2 O 3 (hafnium oxide), J is Sc 2 O 3 (hafnium oxide), the purity of the BaCO 3 and the SrCO 3 is more than 99.7%, and the H 3 The purity of BO 3 is 99.8% or more, the CeO 2 , the Tb 4 O 7 , the La 2 O 3 , the Lu 2 O 3 , the Sc 2 O 3 , the Gd 2 O 3 and all The purity of Eu 2 O 3 is above 99%;
  • the molar fraction ratio of H 3 BO 3 is 2: 0.675: 0.75: 0.05: 0.5: 0.05: 5.
  • the mass of H 3 BO 3 is weighed to 0.3092 g. Other raw materials are weighed according to the molar fraction ratio, as shown in Table 6.
  • the A, the B, the C, the D, the E, the H, and the I are ground in an agate mortar, and are mixed uniformly to obtain the first A mixture, placing the first mixture in a corundum crucible and capping;
  • Step S20 performing a first heat treatment on the first mixture under a condition of a reducing gas to obtain a second mixture
  • the step S20 includes the following steps:
  • step S201 the high-temperature furnace to be used is evacuated and then filled with gas CO.
  • the purpose of the vacuum is to prevent the air and moisture in the high-temperature furnace from affecting the reaction.
  • the purpose of the CO charging is to provide reducing conditions for the reaction so that Performing a redox reaction between the reactant and the CO;
  • step S202 the corundum crucible is placed in the high temperature furnace filled with CO gas, and the first sintering is performed at 450 ° C.
  • the first sintering time is 5 hours to obtain the second mixture. ;
  • step S30 the second mixture is subjected to a second heat treatment under the condition of a reducing gas. After cooling and grinding, a chemical formula of Ba 2 Lu 1.35 Gd 1.5 Ce 0.05 Tb 2 Eu 0.1 B 5 O 17 is obtained. Mentioned phosphor;
  • the temperature is increased to 1250 ° C., and the temperature is kept constant, and the second sintering of the second mixture is continued, and the second sintering time is 10 hours, and then the natural cooling is performed. After that, and appropriate grinding is performed to obtain the phosphor;
  • sintering is a high-temperature solid-phase reaction process, and the sintering is to transform a powdery material into a dense body.
  • the x-ray diffraction spectrum, excitation spectrum, and emission spectrum of the phosphor of this embodiment are similar to those of the first embodiment, but the emission light intensity of Ce 3+ and Tb 3+ in the red light region in this embodiment are weaker than those in the red light region.
  • the chemical formula of the phosphor in this embodiment is Ba 2 Lu 1.85 Sc 1.0 Ce 0.05 Tb 2 Eu 0.1 B 5 O 17.
  • the method for preparing the phosphor in this embodiment includes:
  • Step S10 Weigh out ten raw materials A, B, C, D, E, F, G, H, I, and J, and mix and grind the ten raw materials to obtain a first mixture;
  • A is BaCO 3 (barium carbonate), B is CeO 2 (cerium dioxide), C is Tb 4 O 7 (hafnium oxide), and D is Eu 2 O 3 (dioxide Ii), E is H 3 BO 3 (boric acid), F is SrCO 3 (strontium carbonate), G is La 2 O 3 (lanthanum trioxide), and H is Gd 2 O 3 ( Hafnium oxide), I is Lu 2 O 3 (hafnium oxide), J is Sc 2 O 3 (hafnium oxide), the purity of the BaCO 3 and the SrCO 3 is more than 99.7%, and the H 3 The purity of BO 3 is 99.8% or more, the CeO 2 , the Tb 4 O 7 , the La 2 O 3 , the Lu 2 O 3 , the Sc 2 O 3 , the Gd 2 O 3 and all The purity of Eu 2 O 3 is above 99%;
  • the molar fraction ratio of H 3 BO 3 is 2: 0.925: 0.5: 0.05: 0.5: 0.05: 5.
  • the mass of H 3 BO 3 is weighed to 0.3092g, and other raw materials are weighed according to the molar fraction ratio, as shown in Table 7.
  • the A, the B, the C, the D, the E, the I, and the J are ground in an agate mortar, and after they are mixed uniformly, the first A mixture, placing the first mixture in a corundum crucible and capping;
  • Step S20 performing a first heat treatment on the first mixture under a condition of a reducing gas to obtain a second mixture
  • the step S20 includes the following steps:
  • step S201 the high-temperature furnace to be used is evacuated and then filled with gas CO.
  • the purpose of the vacuum is to prevent the air and moisture in the high-temperature furnace from affecting the reaction.
  • the purpose of the CO charging is to provide reducing conditions for the reaction so that Performing a redox reaction between the reactant and the CO;
  • step S202 the corundum crucible is placed in the high temperature furnace filled with CO gas, and the first sintering is performed at 450 ° C.
  • the first sintering time is 4 hours to obtain the second mixture. ;
  • step S30 the second mixture is subjected to a second heat treatment under the condition of a reducing gas, and after cooling and grinding, a chemical formula of Ba 2 Lu 1.85 Sc 1.0 Ce 0.05 Tb 2 Eu 0.1 B 5 O 17 is obtained. Mentioned phosphor;
  • the temperature is increased to 1200 ° C, and the temperature is kept constant, and the second sintering of the second mixture is continued, and the second sintering time is 24 hours, and the natural cooling is waited After that, and appropriate grinding is performed to obtain the phosphor;
  • sintering is a high-temperature solid-phase reaction process, and the sintering is to transform a powdery material into a dense body.
  • the x-ray diffraction spectrum, excitation spectrum, and emission spectrum of the phosphor of this embodiment are similar to those of the first embodiment, but the emission light intensity of Ce 3+ and Tb 3+ in the red light region in this embodiment are weaker than those in the red light region.
  • the chemical formula of the phosphor in this embodiment is Ba 2 Lu 1 Ce 0.6 Tb 3 Eu 0.4 B 5 O 17.
  • the method for preparing the phosphor in this embodiment includes:
  • Step S10 Weigh out ten raw materials A, B, C, D, E, F, G, H, I, and J, and mix and grind the ten raw materials to obtain a first mixture;
  • A is BaCO 3 (barium carbonate), B is CeO 2 (cerium dioxide), C is Tb 4 O 7 (hafnium oxide), and D is Eu 2 O 3 (dioxide Ii), E is H 3 BO 3 (boric acid), F is SrCO 3 (strontium carbonate), G is La 2 O 3 (lanthanum trioxide), and H is Gd 2 O 3 ( Hafnium oxide), I is Lu 2 O 3 (hafnium oxide), J is Sc 2 O 3 (hafnium oxide), the purity of the BaCO 3 and the SrCO 3 is more than 99.7%, and the H 3 The purity of BO 3 is 99.8% or more, the CeO 2 , the Tb 4 O 7 , the La 2 O 3 , the Lu 2 O 3 , the Sc 2 O 3 , the Gd 2 O 3 and all The purity of Eu 2 O 3 is above 99%;
  • the ratio is 2: 0.5: 0.6 :: 0.75: 0.2: 5, the mass of H 3 BO 3 is weighed to 0.3092g, and other raw materials are weighed according to the molar fraction ratio, as shown in Table 8.
  • the A, the B, the C, the D, and the I are ground in an agate mortar and mixed uniformly to obtain the first mixture, and the first A mixture is placed in a corundum crucible and covered;
  • Step S20 performing a first heat treatment on the first mixture under a condition of a reducing gas to obtain a second mixture
  • the step S20 includes the following steps:
  • step S201 the high-temperature furnace to be used is evacuated and then filled with gas CO.
  • the purpose of the vacuum is to prevent the air and moisture in the high-temperature furnace from affecting the reaction.
  • the purpose of the CO charging is to provide reducing conditions for the reaction so that Performing a redox reaction between the reactant and the CO;
  • step S202 the corundum crucible is placed in the high temperature furnace filled with CO gas, and the first sintering is performed at 500 ° C.
  • the first sintering time is 3 hours to obtain the second mixture. ;
  • step S30 the second mixture is subjected to a second heat treatment under a condition of a reducing gas, and after cooling and grinding, the fluorescence of the formula Ba 2 Lu 1 Ce 0.6 Tb 3 Eu 0.4 B 5 O 17 is obtained . powder;
  • the temperature is increased to 1200 ° C., and the temperature is kept constant, and the second sintering of the second mixture is continued, and the second sintering time is 11 hours, and then the natural cooling is performed. After that, and appropriate grinding is performed to obtain the phosphor;
  • sintering is a high-temperature solid-phase reaction process, and the sintering is to transform a powdery material into a dense body.
  • the x-ray diffraction spectrum, excitation spectrum, and emission spectrum of the phosphor of this embodiment are similar to those of the first embodiment, but the emission light intensity of Ce 3+ and Tb 3+ in the red light region in this embodiment are weaker than those in the red light region.
  • the borate phosphor provided by the present invention has stable crystal phase, high luminous efficiency, and good thermal stability, and can be used to synthesize white LEDs from ultraviolet LEDs or near-ultraviolet LEDs.
  • the borate phosphor provided by the present invention is prepared The method has simple process, easy operation and no pollution.

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Abstract

一种硼酸盐荧光粉及其制备方法，该荧光粉的化学通式为Ba 2-nSr nLu 5-x-y-m-zL mCe xTb yEu zB 5O 17，L为元素Gd、La、Sc中的一种或任意组合，x、y、z、m、n的取值范围分别为：0<x≤0.6，0<y≤3，0<z≤0.4，0≤m≤1，0≤n≤0.5。本发明提供的硼酸盐荧光粉晶相稳定，发光效率高，热稳定性佳，能够用于紫外LED或近紫外LED合成白光LED。

Description

一种硼酸盐荧光粉及其制备方法 技术领域
本发明涉及荧光粉制作领域，尤其涉及一种硼酸盐荧光粉及其制备方法。
 背景技术
在当今追求低碳经济的主流趋势中，具有高效、节能、环保、经久耐用等特点的白光LED（Light Emitting Diode，发光二极管）成为新一代照明光源。
目前，实现白光LED的技术中主要是荧光粉转换技术。荧光粉转换技术主要有两种途径，一种途径是利用蓝光LED激发黄色荧光粉，虽然光转换效率高，但是其发光光谱主要为绿色和黄色成分，红色成分过少，导致合成的白光LED的显色指数较低，另外，由于蓝光直接参与构成白光，而蓝光对人眼有害；另一种途径是利用紫外或近紫外激发的红、绿、蓝三基色荧光粉合成白光LED，该方法合成的白光LED的色彩稳定，其中，红色荧光粉对合成白光LED至关重要，但是现有的红色荧光粉中的Eu3+（正三价铕离子）在发生4f-4f跃迁时在近紫外光的吸收很弱，发光效率很低。
综上所述，现有的红色荧光粉中的Eu3+发生4f-4f跃迁时在近紫外LED的吸收很弱，发光效率很低，而导致红色荧光粉在与绿、蓝两基色荧光粉合成白光LED时，出现色彩不稳定，发光效率低的问题。
 技术问题
本发明提供一种硼酸盐荧光粉，能够解决现有的红色荧光粉发光效率低的问题。
 技术解决方案
为解决上述问题，本发明提供的技术方案如下：
本发明提供一种硼酸盐荧光粉的制备方法，所述荧光粉的化学通式为Ba 2-nSr nLu 5-x-y-m-zL mCe xTb yEu zB 5O 17，所述L为元素Gd、La、Sc中的一种或任意组合，所述x、所述y、所述z、所述m以及所述n均为摩尔分数，所述x、所述y、所述z、所述m以及所述n的取值范围分别为：0.001<x≤0.3，0.001<y≤2，0.01<z≤0.3，0≤m≤1，0≤n≤0.5，所述制备方法包括：
步骤S10，分别称取A、B、C、D、E、F、G、H、I、J十种原料，并对所述十种原料进行混合、研磨，得到第一混合物，其中，所述A是含有Ba 2+的化合物，所述B是含有Ce 3+的化合物，所述C是含有Tb 3+的化合物，所述D是含有Eu 3+的化合物，所述E是含有B 3+的化合物，所述F是含有Sr 2+的化合物，所述G是含有La 3+的化合物，所述H是含有Gd 3+的化合物，所述I是含有Lu 3+的化合物，所述J是含有Sc 3+的化合物；
步骤S20，在具有还原气体的条件下，将所述第一混合物进行第一次热处理，得到第二混合物；
步骤S30，在具有还原气体的条件下，将所述第二混合物进行第二次热处理，待冷却、研磨后，得到化学通式为Ba 2-nSr nLu 5-x-y-m-zL mCe xTb yEu zB 5O 17的所述荧光粉，其中，所述还原气体为一氧化碳或者氢气。
在本发明的至少一种实施例中，所述G中的La 3+、所述H中的Gd 3+以及所述J中的Sc 3+摩尔数之和为a，所述A中的Ba 2+、所述F中的Sr 2+、所述I中的Lu 3+、所述B中的Ce 3+、所述C中的Tb 3+、所述D中的Eu 3+以及所述E中的B 3+的摩尔数与所述a的比值为Ba 2+：Sr 2+：Lu 3+：Ce 3+：Tb 3+：Eu 3+：a=（2-n）：n：（5-x-y-m-z）：x：y：z：5：m。
在本发明的至少一种实施例中，所述A、所述B、所述C、所述D、所述F、所述G、所述H、所述I以及所述J中的任意一者至多含有Ba 2+、Sr 2+、Lu 3+、Ce 3+、Tb 3+、Eu 3+、La 3+、Gd 3+、Sc 3+中的一种金属离子。
在本发明的至少一种实施例中，所述A、所述B、所述C、所述D、所述F、所述G、所述H、所述I以及所述J中的任意一者为氧化物、碳酸盐、硝酸盐、卤化物中的一种或任意组合。
在本发明的至少一种实施例中，所述第一次热处理的温度是350℃~600℃，所述第一次热处理的时间是1~6小时。
在本发明的至少一种实施例中，所述第二次热处理的温度是1000℃~1300℃，所述第二次热处理的时间是2~24小时。
本发明还提供一种硼酸盐荧光粉，所述荧光粉的化学通式为：Ba 2-nSr nLu 5-x-y-m-zL mCe xTb yEu zB 5O 17，其中，所述L为元素Gd、La、Sc中的一种或任意组合，所述x、所述y、所述z、所述m、所述n均为摩尔分数，所述x、所述y、所述z、所述m、所述n的取值范围分别为：0<x≤0.6，0<y≤3，0<z≤0.4，0≤m≤1，0≤n≤0.5。
在本发明的至少一种实施例中，所述x、所述y以及所述z的取值范围分别为：0.001<x≤0.3，0.001<y≤2，0.01<z≤0.3。
本发明提供另一种硼酸盐荧光粉的制备方法，所述荧光粉的化学通式为Ba 2-nSr nLu 5-x-y-m-zL mCe xTb yEu zB 5O 17，所述L为元素Gd、La、Sc中的一种或任意组合，所述x、所述y、所述z、所述m以及所述n均为摩尔分数，所述x、所述y、所述z、所述m以及所述n的取值范围分别为：0<x≤0.6，0<y≤3，0<z≤0.4，0≤m≤1，0≤n≤0.5，所述制备方法包括：
步骤S10，分别称取A、B、C、D、E、F、G、H、I、J十种原料，并对所述十种原料进行混合、研磨，得到第一混合物，其中，
所述A是含有Ba 2+的化合物，所述B是含有Ce 3+的化合物，所述C是含有Tb 3+的化合物，所述D是含有Eu 3+的化合物，所述E是含有B 3+的化合物，所述F是含有Sr 2+的化合物，所述G是含有La 3+的化合物，所述H是含有Gd 3+的化合物，所述I是含有Lu 3+的化合物，所述J是含有Sc 3+的化合物；
步骤S20，在具有还原气体的条件下，将所述第一混合物进行第一次热处理，得到第二混合物；
步骤S30，在具有还原气体的条件下，将所述第二混合物进行第二次热处理，待冷却、研磨后，得到化学通式为Ba 2-nSr nLu 5-x-y-m-zL mCe xTb yEu zB 5O 17的所述荧光粉。
在本发明的至少一种实施例中，所述x、所述y以及所述z的取值范围分别为：0.001<x≤0.3，0.001<y≤2，0.01<z≤0.3。
在本发明的至少一种实施例中，所述G中的La 3+、所述H中的Gd 3+以及所述J中的Sc 3+摩尔数之和为a，所述A中的Ba 2+、所述F中的Sr 2+、所述I中的Lu 3+、所述B中的Ce 3+、所述C中的Tb 3+、所述D中的Eu 3+以及所述E中的B 3+的摩尔数与所述a的比值为Ba 2+：Sr 2+：Lu 3+：Ce 3+：Tb 3+：Eu 3+：a=（2-n）：n：（5-x-y-m-z）：x：y：z：5：m。
在本发明的至少一种实施例中，所述A、所述B、所述C、所述D、所述F、所述G、所述H、所述I以及所述J中的任意一者至多含有Ba 2+、Sr 2+、Lu 3+、Ce 3+、Tb 3+、Eu 3+、La 3+、Gd 3+、Sc 3+中的一种金属离子。
在本发明的至少一种实施例中，所述A、所述B、所述C、所述D、所述F、所述G、所述H、所述I以及所述J中的任意一者为氧化物、碳酸盐、硝酸盐、卤化物中的一种或任意组合。
在本发明的至少一种实施例中，所述还原气体为一氧化碳或者氢气。
在本发明的至少一种实施例中，所述第一次热处理的温度是350℃~600℃，所述第一次热处理的时间是1~6小时。
在本发明的至少一种实施例中，所述第二次热处理的温度是1000℃~1300℃，所述第二次热处理的时间是2~24小时。
 有益效果
本发明的有益效果为：本发明提供的铈、铽、铕共掺杂的硼酸盐荧光粉晶相稳定，发光效率高，热稳定性佳，能够用于紫外LED或近紫外LED合成白光LED；另外，本发明提供的硼酸盐荧光粉制备方法，工艺简单，易操作，无污染。
 附图说明
为了更清楚地说明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单介绍，显而易见地，下面描述中的附图仅仅是发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明实施例一的制备方法的步骤流程图；
图2为本发明实施例一的荧光粉的x射线衍射谱图；
图3为本发明实施例一的荧光粉的激发光谱图；
图4为本发明实施例一的荧光粉的发射光谱图。
 本发明的实施方式
以下各实施例的说明是参考附加的图示，用以例示本发明可用以实施的特定实施例。本发明所提到的方向用语，例如[上]、[下]、[前]、[后]、[左]、[右]、[内]、[外]、[侧面]等，仅是参考附加图式的方向。因此，使用的方向用语是用以说明及理解本发明，而非用以限制本发明。在图中，结构相似的单元是用以相同标号表示。
本发明针对现有的红色荧光粉，由于现有的红色荧光粉中的Eu 3+发生4f-4f跃迁时在近紫外LED的吸收很弱，发光效率很低，而导致红色荧光粉在与绿、蓝两基色荧光粉合成白光LED时，出现色彩不稳定，发光效率低的问题，进而影响显示的技术问题，本实施例能够解决该缺陷。
实施例一
如图1所示，本实施例提供的所述荧光粉的化学式为Ba 2Lu 2.85Ce 0.05Tb 2Eu 0.1B 5O 17，所述制备方法包括：
步骤S10，分别称取A、B、C、D、E、F、G、H、I、J十种原料，并对所述十种原料进行混合、研磨，得到第一混合物；
其中，所述A为BaCO 3（碳酸钡），所述B为CeO 2（二氧化铈），所述C为Tb 4O 7（氧化铽），所述D为Eu 2O 3（三氧化二铕），所述E为H 3BO 3（硼酸），所述F为SrCO 3（碳酸锶），所述G为La 2O 3（三氧化二镧），所述H为Gd 2O 3（氧化钆），所述I为Lu 2O 3（氧化镥），所述J为Sc 2O 3（氧化钪），所述BaCO 3和所述SrCO 3的纯度为99.7%以上，所述H 3BO 3的纯度为99.8%以上，所述CeO 2、所述Tb 4O 7、所述La 2O 3、所述Lu 2O 3、所述Sc 2O 3、所述Gd 2O 3以及所述Eu 2O 3的纯度均为99%以上；
按照各个原料在所述化学式中含有的元素的化学计量数比进行配制，本实施例化学式中各个元素的摩尔分数比为Ba：Lu：Ce：Tb：Eu：B=2：2.85：0.05：2：0.1：5，所述化学式中不含Sr、Gd、La和Sc元素，所述BaCO 3、Lu 2O 3、CeO 2、Tb 4O 7、Eu 2O 3、H 3BO 3的摩尔分数比为2：1.425：0.05：0.5：0.05：5，称取H 3BO 3的质量为0.3092g，其他原料按照摩尔分数比称取，如表1所示。
表1
原料 A B C D E F G H I J
化学式 BaCO3 CeO2 Tb4O7 Eu2O3 H3BO3 SrCO3 La2O3 Gd2O3 Lu2O3 Sc2O3
质量/g 0.3947 0.0086 0.3738 0.0176 0.3092 0 0 0 0.5671 0
然后，将所述A、所述B、所述C、所述D、所述E以及所述I置于玛瑙研钵中进行研磨，并将其混合均匀后，得到所述第一混合物，将所述第一混合物置于刚玉坩埚中，加盖；
步骤S20，在具有还原气体的条件下，将所述第一混合物进行第一次热处理，得到第二混合物；
所述步骤S20，包括以下步骤：
步骤S201，对待使用的高温炉进行抽真空，之后充入气体CO，抽真空目的是防止所述高温炉中的空气及水分对反应造成影响，充入CO的目的是为反应提供还原条件，使得反应物与所述CO进行氧化还原反应；
步骤S202，将所述刚玉坩埚置于充有CO气体的所述高温炉中，在450℃下，进行第一次烧结，所述第一次烧结的时间为4小时，得到所述第二混合物；
步骤S30，在具有还原气体的条件下，将所述第二混合物进行第二次热处理，待冷却、研磨后，得到化学式为Ba 2Lu 2.85Ce 0.05Tb 2Eu 0.1B 5O 17的所述荧光粉；
具体地，在所述高温炉中，将温度升至1200℃，并保持恒温，继续对所述第二混合物进行第二次烧结，所述第二次烧结的时间为10小时，等其自然冷却后，并进行适当研磨，得到所述荧光粉；
其中，烧结是高温固相反应过程，所述烧结是将粉状物料转变为致密体。
如图2所示，图2为本实施例的所述荧光粉的x射线衍射谱与标准物质的x射线衍射谱的对比图，其中，图中所述荧光粉的x射线衍射谱位于所述标准物质的x射线衍射谱的上方；从图中可以看出，本实施例制备的所述荧光粉的衍射谱（上排）与标准物质的衍射谱（下排）的对照峰位置几乎一致，存在的杂相很少，且峰型尖锐，表明本实施例中用到的高温固相反应法合成的产物纯度较高。
如图3所示，图3为选实施例的荧光粉的激发光谱图，从图中可以看出，所述荧光粉在230~380纳米的激发光激发下，发光强度较高。
如图4所示，图4实施例的荧光粉的发射光谱图，从图中可以看出，在347纳米激发光波长下，所述荧光粉的发射光谱的峰值波长为617纳米。
本实施例提供的所述制备方法，在230~380纳米激发下，可以实现主峰位于617纳米的红光发射，色纯度较高。
实施例二
本实施例的所述荧光粉的化学式为Ba 2Lu 4.898Ce 0.001Tb 0.001Eu 0.1B 5O 17，本实施例的所述荧光粉的制备方法包括：
步骤S10，分别称取A、B、C、D、E、F、G、H、I、J十种原料，并对所述十种原料进行混合、研磨，得到第一混合物；
其中，所述A为BaCO 3（碳酸钡），所述B为CeO 2（二氧化铈），所述C为Tb 4O 7（氧化铽），所述D为Eu 2O 3（三氧化二铕），所述E为H 3BO 3（硼酸），所述F为SrCO 3（碳酸锶），所述G为La 2O 3（三氧化二镧），所述H为Gd 2O 3（氧化钆），所述I为Lu 2O 3（氧化镥），所述J为Sc 2O 3（氧化钪），所述BaCO 3和所述SrCO 3的纯度为99.7%以上，所述H 3BO 3的纯度为99.8%以上，所述CeO 2、所述Tb 4O 7、所述La 2O 3、所述Lu 2O 3、所述Sc 2O 3、所述Gd 2O 3以及所述Eu 2O 3的纯度均为99%以上；
按照各个原料在所述化学式中含有的元素的化学计量数比进行配制，本实施例化学式中各个元素的摩尔分数比为Ba：Lu：Ce：Tb：Eu：B=2：4.898：0.001：0.001：0.1：5，所述化学式中不含Sr、Gd、La和Sc元素，所述BaCO 3、Lu 2O 3、CeO 2、Tb 4O 7、Eu 2O 3、H 3BO 3的摩尔分数比为2：2.449：0.001：0.00025：0.05：5，称取H 3BO 3的质量为0.3092g，其他原料按照摩尔分数比称取，如表2所示。
表2
原料 A B C D E F G H I J
化学式 BaCO3 CeO2 Tb4O7 Eu2O3 H3BO3 SrCO3 La2O3 Gd2O3 Lu2O3 Sc2O3
质量/g 0.3947 0.0002 0.0002 0.0176 0.3092 0 0 0 0.9745 0
然后，将所述A、所述B、所述C、所述D、所述E以及所述I置于玛瑙研钵中进行研磨，并将其混合均匀后，得到所述第一混合物，将所述第一混合物置于刚玉坩埚中，加盖；
步骤S20，在具有还原气体的条件下，将所述第一混合物进行第一次热处理，得到第二混合物；
所述步骤S20，包括以下步骤：
步骤S201，对待使用的高温炉进行抽真空，之后充入气体CO，抽真空目的是防止所述高温炉中的空气及水分对反应造成影响，充入CO的目的是为反应提供还原条件，使得反应物与所述CO进行氧化还原反应；
步骤S202，将所述刚玉坩埚置于充有CO气体的所述高温炉中，在480℃下，进行第一次烧结，所述第一次烧结的时间为4小时，得到所述第二混合物；
步骤S30，在具有还原气体的条件下，将所述第二混合物进行第二次热处理，待冷却、研磨后，得到化学式为Ba 2Lu 4.898Ce 0.001Tb 0.001Eu 0.1B 5O 17的所述荧光粉；
具体地，在所述高温炉中，将温度升至1200℃，并保持恒温，继续对所述第二混合物进行第二次烧结，所述第二次烧结的时间为10小时，等其自然冷却后，并进行适当研磨，得到所述荧光粉；
其中，烧结是高温固相反应过程，所述烧结是将粉状物料转变为致密体。
本优选实施例的所述荧光粉的x射线衍射光谱、激发光谱以及发射光谱与实施例一相似，但本实施例的  Ce 3+与Tb 3+在红光区域的发射光强度均弱于所述实施例一。
实施例三
本实施例的所述荧光粉的化学式为Ba 1.5Sr 0.5Lu 4.898Ce 0.001Tb 0.001Eu 0.1B 5O 17，本实施的所述荧光粉的制备方法包括：
步骤S10，分别称取A、B、C、D、E、F、G、H、I、J十种原料，并对所述十种原料进行混合、研磨，得到第一混合物；
其中，所述A为BaCO 3（碳酸钡），所述B为CeO 2（二氧化铈），所述C为Tb 4O 7（氧化铽），所述D为Eu 2O 3（三氧化二铕），所述E为H 3BO 3（硼酸），所述F为SrCO 3（碳酸锶），所述G为La 2O 3（三氧化二镧），所述H为Gd 2O 3（氧化钆），所述I为Lu 2O 3（氧化镥），所述J为Sc 2O 3（氧化钪），所述BaCO 3和所述SrCO 3的纯度为99.7%以上，所述H 3BO 3的纯度为99.8%以上，所述CeO 2、所述Tb 4O 7、所述La 2O 3、所述Lu 2O 3、所述Sc 2O 3、所述Gd 2O 3以及所述Eu 2O 3的纯度均为99%以上；
按照各个原料在所述化学式中含有的元素的化学计量数比进行配制，本实施例化学式中各个元素的摩尔分数比为Ba：Sr：Lu：Ce：Tb：Eu：B=1.5：0.5：4.898：0.001：0.001：0.1：5，所述化学式中不含Gd、La和Sc元素，所述BaCO 3、SrCO 3、Lu 2O 3、CeO 2、Tb 4O 7、Eu 2O 3、H 3BO 3的摩尔分数比为1.5：0.5：2.449：0.001：0.00025：0.05：5，称取H 3BO 3的质量为0.3092g，其他原料按照摩尔分数比称取，如表3所示。
表3
原料 A B C D E F G H I J
化学式 BaCO3 CeO2 Tb4O7 Eu2O3 H3BO3 SrCO3 La2O3 Gd2O3 Lu2O3 Sc2O3
质量/g 0.2960 0.0002 0.0002 0.0176 0.3092 0.0738 0 0 0.9745 0
然后，将所述A、所述B、所述C、所述D、所述E、所述F以及所述I置于玛瑙研钵中进行研磨，并将其混合均匀后，得到所述第一混合物，将所述第一混合物置于刚玉坩埚中，加盖；
步骤S20，在具有还原气体的条件下，将所述第一混合物进行第一次热处理，得到第二混合物；
所述步骤S20，包括以下步骤：
步骤S201，对待使用的高温炉进行抽真空，之后充入气体CO，抽真空目的是防止所述高温炉中的空气及水分对反应造成影响，充入CO的目的是为反应提供还原条件，使得反应物与所述CO进行氧化还原反应；
步骤S202，将所述刚玉坩埚置于充有CO气体的所述高温炉中，在460℃下，进行第一次烧结，所述第一次烧结的时间为4小时，得到所述第二混合物；
步骤S30，在具有还原气体的条件下，将所述第二混合物进行第二次热处理，待冷却、研磨后，得到化学式为Ba 1.5Sr 0.5Lu 4.898Ce 0.001Tb 0.001Eu 0.1B 5O 17的所述荧光粉；
具体地，在所述高温炉中，将温度升至1200℃，并保持恒温，继续对所述第二混合物进行第二次烧结，所述第二次烧结的时间为8小时，等其自然冷却后，并进行适当研磨，得到所述荧光粉；
其中，烧结是高温固相反应过程，所述烧结是将粉状物料转变为致密体。
本实施例的所述荧光粉的x射线衍射光谱、激发光谱以及发射光谱与实施例一相似，但本实施例的 Ce 3+与Tb 3+在红光区域的发射光强度均弱于所述实施例一。
实施例四
本实施例的所述荧光粉的化学式为Ba 2Lu 1.85La 1.0Ce 0.05Tb 2Eu 0.1B 5O 17，本实施的所述荧光粉的制备方法包括：
步骤S10，分别称取A、B、C、D、E、F、G、H、I、J十种原料，并对所述十种原料进行混合、研磨，得到第一混合物；
其中，所述A为BaCO 3（碳酸钡），所述B为CeO 2（二氧化铈），所述C为Tb 4O 7（氧化铽），所述D为Eu 2O 3（三氧化二铕），所述E为H 3BO 3（硼酸），所述F为SrCO 3（碳酸锶），所述G为La 2O 3（三氧化二镧），所述H为Gd 2O 3（氧化钆），所述I为Lu 2O 3（氧化镥），所述J为Sc 2O 3（氧化钪），所述BaCO 3和所述SrCO 3的纯度为99.7%以上，所述H 3BO 3的纯度为99.8%以上，所述CeO 2、所述Tb 4O 7、所述La 2O 3、所述Lu 2O 3、所述Sc 2O 3、所述Gd 2O 3以及所述Eu 2O 3的纯度均为99%以上；
按照各个原料在所述化学式中含有的元素的化学计量数比进行配制，本实施例化学式中各个元素的摩尔分数比为Ba：Lu：La：Ce：Tb：Eu：B=2：1.85：1.0：0.05：2：0.1：5，所述化学式中不含Sr、Gd和Sc元素，所述BaCO 3、Lu 2O 3、La 2O 3、CeO 2、Tb 4O 7、Eu 2O 3、H 3BO 3的摩尔分数比为2：0.925：0.5：0.05：0.5：0.05：5，称取H 3BO 3的质量为0.3092g，其他原料按照摩尔分数比称取，如表4所示。
表4
原料 A B C D E F G H I J
化学式 BaCO3 CeO2 Tb4O7 Eu2O3 H3BO3 SrCO3 La2O3 Gd2O3 Lu2O3 Sc2O3
质量/g 0.3947 0.0086 0.3738 0.0176 0.3092 0 0.1629 0 0.3681 0
然后，将所述A、所述B、所述C、所述D、所述E、所述G以及所述I置于玛瑙研钵中进行研磨，并将其混合均匀后，得到所述第一混合物，将所述第一混合物置于刚玉坩埚中，加盖；
步骤S20，在具有还原气体的条件下，将所述第一混合物进行第一次热处理，得到第二混合物；
所述步骤S20，包括以下步骤：
步骤S201，对待使用的高温炉进行抽真空，之后充入气体CO，抽真空目的是防止所述高温炉中的空气及水分对反应造成影响，充入CO的目的是为反应提供还原条件，使得反应物与所述CO进行氧化还原反应；
步骤S202，将所述刚玉坩埚置于充有CO气体的所述高温炉中，在450℃下，进行第一次烧结，所述第一次烧结的时间为4小时，得到所述第二混合物；
步骤S30，在具有还原气体的条件下，将所述第二混合物进行第二次热处理，待冷却、研磨后，得到化学通式为Ba 2Lu 1.85La 1.0Ce 0.05Tb 2Eu 0.1B 5O 17的所述荧光粉；
具体地，在所述高温炉中，将温度升至1190℃，并保持恒温，继续对所述第二混合物进行第二次烧结，所述第二次烧结的时间为14小时，等其自然冷却后，并进行适当研磨，得到所述荧光粉；
其中，烧结是高温固相反应过程，所述烧结是将粉状物料转变为致密体。
实施例的所述荧光粉的x射线衍射光谱、激发光谱以及发射光谱与实施例一相似，但本实施例的     Ce 3+与Tb 3+在红光区域的发射光强度均弱于所述实施例一。
实施例五
本实施例的所述荧光粉的化学式为Ba 2Lu 1.85Gd 1.0Ce 0.05Tb 2Eu 0.1B 5O 17，本实施的所述荧光粉的制备方法包括：
步骤S10，分别称取A、B、C、D、E、F、G、H、I、J十种原料，并对所述十种原料进行混合、研磨，得到第一混合物；
其中，所述A为BaCO 3（碳酸钡），所述B为CeO 2（二氧化铈），所述C为Tb 4O 7（氧化铽），所述D为Eu 2O 3（三氧化二铕），所述E为H 3BO 3（硼酸），所述F为SrCO 3（碳酸锶），所述G为La 2O 3（三氧化二镧），所述H为Gd 2O 3（氧化钆），所述I为Lu 2O 3（氧化镥），所述J为Sc 2O 3（氧化钪），所述BaCO 3和所述SrCO 3的纯度为99.7%以上，所述H 3BO 3的纯度为99.8%以上，所述CeO 2、所述Tb 4O 7、所述La 2O 3、所述Lu 2O 3、所述Sc 2O 3、所述Gd 2O 3以及所述Eu 2O 3的纯度均为99%以上；
按照各个原料在所述化学式中含有的元素的化学计量数比进行配制，本实施例化学式中各个元素的摩尔分数比为Ba：Lu：Gd：Ce：Tb：Eu：B=2：1.85：1.0：0.05：2：0.1：5，所述化学式中不含Sr、La和Sc元素，所述BaCO 3、Lu 2O 3、Gd 2O 3、CeO 2、Tb 4O 7、Eu 2O 3、H 3BO 3的摩尔分数比为2：0.925：0.5：0.05：0.5：0.05：5，称取H 3BO 3的质量为0.3092g，其他原料按照摩尔分数比称取，如表5所示。
表5
原料 A B C D E F G H I J
化学式 BaCO3 CeO2 Tb4O7 Eu2O3 H3BO3 SrCO3 La2O3 Gd2O3 Lu2O3 Sc2O3
质量/g 0.3947 0.0086 0.3738 0.0176 0.3092 0 0 0.1813 0.3681 0
然后，将所述A、所述B、所述C、所述D、所述E、所述H以及所述I置于玛瑙研钵中进行研磨，并将其混合均匀后，得到所述第一混合物，将所述第一混合物置于刚玉坩埚中，加盖；
步骤S20，在具有还原气体的条件下，将所述第一混合物进行第一次热处理，得到第二混合物；
所述步骤S20，包括以下步骤：
步骤S201，对待使用的高温炉进行抽真空，之后充入气体CO，抽真空目的是防止所述高温炉中的空气及水分对反应造成影响，充入CO的目的是为反应提供还原条件，使得反应物与所述CO进行氧化还原反应；
步骤S202，将所述刚玉坩埚置于充有CO气体的所述高温炉中，在450℃下，进行第一次烧结，所述第一次烧结的时间为4小时，得到所述第二混合物；
步骤S30，在具有还原气体的条件下，将所述第二混合物进行第二次热处理，待冷却、研磨后，得到化学式为Ba 2Lu 1.85Gd 1.0Ce 0.05Tb 2Eu 0.1B 5O 17的所述荧光粉；
具体地，在所述高温炉中，将温度升至1200℃，并保持恒温，继续对所述第二混合物进行第二次烧结，所述第二次烧结的时间为10小时，等其自然冷却后，并进行适当研磨，得到所述荧光粉；
其中，烧结是高温固相反应过程，所述烧结是将粉状物料转变为致密体。
本实施例的所述荧光粉的x射线衍射光谱、激发光谱以及发射光谱与实施例一相似，但本实施例的 Ce 3+与Tb 3+在红光区域的发射光强度均弱于所述实施例一。
实施例六
本实施例的所述荧光粉的化学式为Ba 2Lu 1.35Gd 1.5Ce 0.05Tb 2Eu 0.1B 5O 17，本实施的所述荧光粉的制备方法包括：
步骤S10，分别称取A、B、C、D、E、F、G、H、I、J十种原料，并对所述十种原料进行混合、研磨，得到第一混合物；
其中，所述A为BaCO 3（碳酸钡），所述B为CeO 2（二氧化铈），所述C为Tb 4O 7（氧化铽），所述D为Eu 2O 3（三氧化二铕），所述E为H 3BO 3（硼酸），所述F为SrCO 3（碳酸锶），所述G为La 2O 3（三氧化二镧），所述H为Gd 2O 3（氧化钆），所述I为Lu 2O 3（氧化镥），所述J为Sc 2O 3（氧化钪），所述BaCO 3和所述SrCO 3的纯度为99.7%以上，所述H 3BO 3的纯度为99.8%以上，所述CeO 2、所述Tb 4O 7、所述La 2O 3、所述Lu 2O 3、所述Sc 2O 3、所述Gd 2O 3以及所述Eu 2O 3的纯度均为99%以上；
按照各个原料在所述化学式中含有的元素的化学计量数比进行配制，本实施例化学式中各个元素的摩尔分数比为Ba：Lu：Gd：Ce：Tb：Eu：B=2：1.35：1.5：0.05：2：0.1：5，所述化学式中不含Sr、La和Sc元素，所述BaCO 3、Lu 2O 3、Gd 2O 3、CeO 2、Tb 4O 7、Eu 2O 3、H 3BO 3的摩尔分数比为2：0.675：0.75：0.05：0.5：0.05：5，称取H 3BO 3的质量为0.3092g，其他原料按照摩尔分数比称取，如表6所示。
表6
原料 A B C D E F G H I J
化学式 BaCO3 CeO2 Tb4O7 Eu2O3 H3BO3 SrCO3 La2O3 Gd2O3 Lu2O3 Sc2O3
质量/g 0.3947 0.0086 0.3738 0.0176 0.3092 0 0 0.2719 0.2687 0
然后，将所述A、所述B、所述C、所述D、所述E、所述H以及所述I置于玛瑙研钵中进行研磨，并将其混合均匀后，得到所述第一混合物，将所述第一混合物置于刚玉坩埚中，加盖；
步骤S20，在具有还原气体的条件下，将所述第一混合物进行第一次热处理，得到第二混合物；
所述步骤S20，包括以下步骤：
步骤S201，对待使用的高温炉进行抽真空，之后充入气体CO，抽真空目的是防止所述高温炉中的空气及水分对反应造成影响，充入CO的目的是为反应提供还原条件，使得反应物与所述CO进行氧化还原反应；
步骤S202，将所述刚玉坩埚置于充有CO气体的所述高温炉中，在450℃下，进行第一次烧结，所述第一次烧结的时间为5小时，得到所述第二混合物；
步骤S30，在具有还原气体的条件下，将所述第二混合物进行第二次热处理，待冷却、研磨后，得到化学式为Ba 2Lu 1.35Gd 1.5Ce 0.05Tb 2Eu 0.1B 5O 17的所述荧光粉；
具体地，在所述高温炉中，将温度升至1250℃，并保持恒温，继续对所述第二混合物进行第二次烧结，所述第二次烧结的时间为10小时，等其自然冷却后，并进行适当研磨，得到所述荧光粉；
其中，烧结是高温固相反应过程，所述烧结是将粉状物料转变为致密体。
本实施例的所述荧光粉的x射线衍射光谱、激发光谱以及发射光谱与实施例一相似，但本实施例的 Ce 3+与Tb 3+在红光区域的发射光强度均弱于所述实施例一。
实施例七
本实施例的所述荧光粉的化学式为Ba 2Lu 1.85Sc 1.0Ce 0.05Tb 2Eu 0.1B 5O 17，本实施的所述荧光粉的制备方法包括：
步骤S10，分别称取A、B、C、D、E、F、G、H、I、J十种原料，并对所述十种原料进行混合、研磨，得到第一混合物；
其中，所述A为BaCO 3（碳酸钡），所述B为CeO 2（二氧化铈），所述C为Tb 4O 7（氧化铽），所述D为Eu 2O 3（三氧化二铕），所述E为H 3BO 3（硼酸），所述F为SrCO 3（碳酸锶），所述G为La 2O 3（三氧化二镧），所述H为Gd 2O 3（氧化钆），所述I为Lu 2O 3（氧化镥），所述J为Sc 2O 3（氧化钪），所述BaCO 3和所述SrCO 3的纯度为99.7%以上，所述H 3BO 3的纯度为99.8%以上，所述CeO 2、所述Tb 4O 7、所述La 2O 3、所述Lu 2O 3、所述Sc 2O 3、所述Gd 2O 3以及所述Eu 2O 3的纯度均为99%以上；
按照各个原料在所述化学式中含有的元素的化学计量数比进行配制，本实施例化学式中各个元素的摩尔分数比为Ba：Lu：Sc：Ce：Tb：Eu：B=2：1.85：1.0：0.05：2：0.1：5，所述化学式中不含Sr、La和Gd元素，所述BaCO 3、Lu 2O 3、Sc 2O 3、CeO 2、Tb 4O 7、Eu 2O 3、H 3BO 3的摩尔分数比为2：0.925：0.5：0.05：0.5：0.05：5，称取H 3BO 3的质量为0.3092g，其他原料按照摩尔分数比称取，如表7所示。
表7
原料 A B C D E F G H I J
化学式 BaCO3 CeO2 Tb4O7 Eu2O3 H3BO3 SrCO3 La2O3 Gd2O3 Lu2O3 Sc2O3
质量/g 0.3947 0.0086 0.3738 0.0176 0.3092 0 0 0 0.3681 0.0689
然后，将所述A、所述B、所述C、所述D、所述E、所述I以及所述J置于玛瑙研钵中进行研磨，并将其混合均匀后，得到所述第一混合物，将所述第一混合物置于刚玉坩埚中，加盖；
步骤S20，在具有还原气体的条件下，将所述第一混合物进行第一次热处理，得到第二混合物；
所述步骤S20，包括以下步骤：
步骤S201，对待使用的高温炉进行抽真空，之后充入气体CO，抽真空目的是防止所述高温炉中的空气及水分对反应造成影响，充入CO的目的是为反应提供还原条件，使得反应物与所述CO进行氧化还原反应；
步骤S202，将所述刚玉坩埚置于充有CO气体的所述高温炉中，在450℃下，进行第一次烧结，所述第一次烧结的时间为4小时，得到所述第二混合物；
步骤S30，在具有还原气体的条件下，将所述第二混合物进行第二次热处理，待冷却、研磨后，得到化学式为Ba 2Lu 1.85Sc 1.0Ce 0.05Tb 2Eu 0.1B 5O 17的所述荧光粉；
具体地，在所述高温炉中，将温度升至1200℃，并保持恒温，继续对所述第二混合物进行第二次烧结，所述第二次烧结的时间为24小时，等其自然冷却后，并进行适当研磨，得到所述荧光粉；
其中，烧结是高温固相反应过程，所述烧结是将粉状物料转变为致密体。
本实施例的所述荧光粉的x射线衍射光谱、激发光谱以及发射光谱与实施例一相似，但本实施例的 Ce 3+与Tb 3+在红光区域的发射光强度均弱于所述实施例一。
实施例八
本实施例的所述荧光粉的化学式为Ba 2Lu 1Ce 0.6Tb 3Eu 0.4B 5O 17，本实施的所述荧光粉的制备方法包括：
步骤S10，分别称取A、B、C、D、E、F、G、H、I、J十种原料，并对所述十种原料进行混合、研磨，得到第一混合物；
其中，所述A为BaCO 3（碳酸钡），所述B为CeO 2（二氧化铈），所述C为Tb 4O 7（氧化铽），所述D为Eu 2O 3（三氧化二铕），所述E为H 3BO 3（硼酸），所述F为SrCO 3（碳酸锶），所述G为La 2O 3（三氧化二镧），所述H为Gd 2O 3（氧化钆），所述I为Lu 2O 3（氧化镥），所述J为Sc 2O 3（氧化钪），所述BaCO 3和所述SrCO 3的纯度为99.7%以上，所述H 3BO 3的纯度为99.8%以上，所述CeO 2、所述Tb 4O 7、所述La 2O 3、所述Lu 2O 3、所述Sc 2O 3、所述Gd 2O 3以及所述Eu 2O 3的纯度均为99%以上；
按照各个原料在所述化学式中含有的元素的化学计量数比进行配制，本实施例化学式中各个元素的摩尔分数比为Ba：Lu：Ce：Tb：Eu：B=2：1：0.6：3：0.4：5，所述化学式中不含Sr、Sc、La和Gd元素，所述BaCO 3、Lu 2O 3、CeO 2、Tb 4O 7、Eu 2O 3、H 3BO 3的摩尔分数比为2：0.5：0.6：：0.75：0.2：5，称取H 3BO 3的质量为0.3092g，其他原料按照摩尔分数比称取，如表8所示。
表8
原料 A B C D E F G H I J
化学式 BaCO3 CeO2 Tb4O7 Eu2O3 H3BO3 SrCO3 La2O3 Gd2O3 Lu2O3 Sc2O3
质量/g 0.3947 0.1033 0.5608 0.0704 0.3092 0 0 0 0.1990 0
然后，将所述A、所述B、所述C、所述D、以及所述I置于玛瑙研钵中进行研磨，并将其混合均匀后，得到所述第一混合物，将所述第一混合物置于刚玉坩埚中，加盖；
步骤S20，在具有还原气体的条件下，将所述第一混合物进行第一次热处理，得到第二混合物；
所述步骤S20，包括以下步骤：
步骤S201，对待使用的高温炉进行抽真空，之后充入气体CO，抽真空目的是防止所述高温炉中的空气及水分对反应造成影响，充入CO的目的是为反应提供还原条件，使得反应物与所述CO进行氧化还原反应；
步骤S202，将所述刚玉坩埚置于充有CO气体的所述高温炉中，在500℃下，进行第一次烧结，所述第一次烧结的时间为3小时，得到所述第二混合物；
步骤S30，在具有还原气体的条件下，将所述第二混合物进行第二次热处理，待冷却、研磨后，得到化学式为Ba 2Lu 1Ce 0.6Tb 3Eu 0.4B 5O 17的所述荧光粉；
具体地，在所述高温炉中，将温度升至1200℃，并保持恒温，继续对所述第二混合物进行第二次烧结，所述第二次烧结的时间为11小时，等其自然冷却后，并进行适当研磨，得到所述荧光粉；
其中，烧结是高温固相反应过程，所述烧结是将粉状物料转变为致密体。
本实施例的所述荧光粉的x射线衍射光谱、激发光谱以及发射光谱与实施例一相似，但本实施例的 Ce 3+与Tb 3+在红光区域的发射光强度均弱于所述实施例一。
有益效果：本发明提供的硼酸盐荧光粉晶相稳定，发光效率高，热稳定性佳，能够用于紫外LED或近紫外LED合成白光LED；另外，本发明提供的硼酸盐荧光粉制备方法，工艺简单，易操作，无污染。
综上所述，虽然本发明已以优选实施例揭露如上，但上述优选实施例并非用以限制本发明，本领域的普通技术人员，在不脱离本发明的精神和范围内，均可作各种更动与润饰，因此本发明的保护范围以权利要求界定的范围为准。

Claims (16)

  1. 一种硼酸盐荧光粉的制备方法，其中，所述荧光粉的化学通式为Ba 2-nSr nLu 5-x-y-m-zL mCe xTb yEu zB 5O 17，所述L为元素Gd、La、Sc中的一种或任意组合，所述x、所述y、所述z、所述m以及所述n均为摩尔分数，所述x、所述y、所述z、所述m以及所述n的取值范围分别为：0.001<x≤0.3，0.001<y≤2，0.01<z≤0.3，0≤m≤1，0≤n≤0.5，所述制备方法包括：
    步骤S10，分别称取A、B、C、D、E、F、G、H、I、J十种原料，并对所述十种原料进行混合、研磨，得到第一混合物，其中，
    所述A是含有Ba 2+的化合物，所述B是含有Ce 3+的化合物，所述C是含有Tb 3+的化合物，所述D是含有Eu 3+的化合物，所述E是含有B 3+的化合物，所述F是含有Sr 2+的化合物，所述G是含有La 3+的化合物，所述H是含有Gd 3+的化合物，所述I是含有Lu 3+的化合物，所述J是含有Sc 3+的化合物；
    步骤S20，在具有还原气体的条件下，将所述第一混合物进行第一次热处理，得到第二混合物；
    步骤S30，在具有还原气体的条件下，将所述第二混合物进行第二次热处理，待冷却、研磨后，得到化学通式为Ba 2-nSr nLu 5-x-y-m-zL mCe xTb yEu zB 5O 17的所述荧光粉，其中，所述还原气体为一氧化碳或者氢气。
  2. 根据权利要求1述的制备方法，其中，所述G中的La 3+、所述H中的Gd 3+以及所述J中的Sc 3+摩尔数之和为a，所述A中的Ba 2+、所述F中的Sr 2+、所述I中的Lu 3+、所述B中的Ce 3+、所述C中的Tb 3+、所述D中的Eu 3+以及所述E中的B 3+的摩尔数与所述a的比值为Ba 2+：Sr 2+：Lu 3+：Ce 3+：Tb 3+：Eu 3+：a=（2-n）：n：（5-x-y-m-z）：x：y：z：5：m。
  3. 根据权利要求1所述的制备方法，其中，所述A、所述B、所述C、所述D、所述F、所述G、所述H、所述I以及所述J中的任意一者至多含有Ba 2+、Sr 2+、Lu 3+、Ce 3+、Tb 3+、Eu 3+、La 3+、Gd 3+、Sc 3+中的一种金属离子。
  4. 根据权利要求3所述的制备方法，其中，所述A、所述B、所述C、所述D、所述F、所述G、所述H、所述I以及所述J中的任意一者为氧化物、碳酸盐、硝酸盐、卤化物中的一种或任意组合。
  5. 根据权利要求1所述的制备方法，其中，所述第一次热处理的温度是350℃~600℃，所述第一次热处理的时间是1~6小时。
  6. 根据权利要求1所述的制备方法，其中，所述第二次热处理的温度是1000℃~1300℃，所述第二次热处理的时间是2~24小时。
  7. 一种硼酸盐荧光粉，其中，所述荧光粉的化学通式为：Ba 2-nSr nLu 5-x-y-m-zL mCe xTb yEu zB 5O 17，其中，
    所述L为元素Gd、La、Sc中的一种或任意组合，
    所述x、所述y、所述z、所述m、所述n均为摩尔分数，所述x、所述y、所述z、所述m、所述n的取值范围分别为：0<x≤0.6，0<y≤3，0<z≤0.4，0≤m≤1，0≤n≤0.5。
  8. 根据权利要求7所述硼酸盐荧光粉，其中，所述x、所述y以及所述z的取值范围分别为：0.001<x≤0.3，0.001<y≤2，0.01<z≤0.3。
  9. 一种硼酸盐荧光粉的制备方法，其中，所述荧光粉的化学通式为Ba 2-nSr nLu 5-x-y-m-zL mCe xTb yEu zB 5O 17，所述L为元素Gd、La、Sc中的一种或任意组合，所述x、所述y、所述z、所述m以及所述n均为摩尔分数，所述x、所述y、所述z、所述m以及所述n的取值范围分别为：0<x≤0.6，0<y≤3，0<z≤0.4，0≤ m≤ 1，0≤ n≤ 0.5，所述制备方法包括：
    步骤S10，分别称取A、B、C、D、E、F、G、H、I、J十种原料，并对所述十种原料进行混合、研磨，得到第一混合物，其中，
    所述A是含有Ba 2+的化合物，所述B是含有Ce 3+的化合物，所述C是含有Tb 3+的化合物，所述D是含有Eu 3+的化合物，所述E是含有B 3+的化合物，所述F是含有Sr 2+的化合物，所述G是含有La 3+的化合物，所述H是含有Gd 3+的化合物，所述I是含有Lu 3+的化合物，所述J是含有Sc 3+的化合物；
    步骤S20，在具有还原气体的条件下，将所述第一混合物进行第一次热处理，得到第二混合物；
    步骤S30，在具有还原气体的条件下，将所述第二混合物进行第二次热处理，待冷却、研磨后，得到化学通式为Ba 2-nSr nLu 5-x-y-m-zL mCe xTb yEu zB 5O 17的所述荧光粉。
  10. 根据权利要求9所述的制备方法，其中，所述x、所述y以及所述z的取值范围分别为：0.001<x≤0.3，0.001<y≤2，0.01<z≤0.3。
  11. 根据权利要求9所述的制备方法，其中，所述G中的La 3+、所述H中的Gd 3+以及所述J中的Sc 3+摩尔数之和为a，所述A中的Ba 2+、所述F中的Sr 2+、所述I中的Lu 3+、所述B中的Ce 3+、所述C中的Tb 3+、所述D中的Eu 3+以及所述E中的B 3+的摩尔数与所述a的比值为Ba 2+：Sr 2+：Lu 3+：Ce 3+：Tb 3+：Eu 3+：a=（2-n）：n：（5-x-y-m-z）：x：y：z：5：m。
  12. 根据权利要求9所述的制备方法，其中，所述A、所述B、所述C、所述D、所述F、所述G、所述H、所述I以及所述J中的任意一者至多含有Ba 2+、Sr 2+、Lu 3+、Ce 3+、Tb 3+、Eu 3+、La 3+、Gd 3+、Sc 3+中的一种金属离子。
  13. 根据权利要求12所述的制备方法，其中，所述A、所述B、所述C、所述D、所述F、所述G、所述H、所述I以及所述J中的任意一者为氧化物、碳酸盐、硝酸盐、卤化物中的一种或任意组合。
  14. 根据权利要求9所述的制备方法，其中，所述还原气体为一氧化碳或者氢气。
  15. 根据权利要求9所述的制备方法，其中，所述第一次热处理的温度是350℃~600℃，所述第一次热处理的时间是1~6小时。
  16. 根据权利要求3所述的制备方法，其中，所述第二次热处理的温度是1000℃~1300℃，所述第二次热处理的时间是2~24小时。
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