Antimonate near-infrared luminescent material and preparation method thereof

Abstract

The invention discloses an antimonate near-infrared luminescent material and a preparation method thereof. The chemical expression of the luminescent material is YGd (Sc1-x-yGay) SbO7: xCr < 3 + >, in the formula, x is equal to 0.003-0.1, and y is equal to 0-0.97. The preparation method comprises the following steps: weighing the corresponding raw materials of yttrium oxide, gadolinium oxide, scandium oxide, gallium oxide, antimony oxide and chromium oxide according to the stoichiometric ratio of the chemical formula, then grinding and uniformly mixing the raw materials to obtain a mixture, putting the mixture into a crucible, sintering for 2-7 hours in a high-temperature furnace in an air atmosphere at 1100-1300 DEG C, and cooling to room temperature to obtain the yttrium oxide-gadolinium oxide-scandium oxide-gallium oxide-antimony oxide composite material. And cooling to room temperature to obtain the antimonate near-infrared luminescent material. The obtained antimonate near-infrared luminescent material emits near-infrared light under the excitation of a blue light chip, and the emission peak value is near 760 nm. The luminescent material is good in dispersity, uniform in granularity, good in chemical stability and high in luminous efficiency, an excitation band of the luminescent material covers purple and blue light regions, and the luminescent material can be used as a near-infrared luminescent material for a blue light LED.

Description

Technical Field

[0001] This invention relates to the field of luminescent materials technology, and in particular to an antimonate near-infrared luminescent material and its preparation method. Background Technology

[0002] Near-infrared luminescent materials have attracted extensive research due to their wide applicability in biomedical imaging, non-destructive testing, night vision technology, and supplemental lighting for plants on balconies. Unlike traditional near-infrared light sources such as halogen or tungsten halogen lamps, these materials exhibit superior characteristics in terms of luminous efficiency, operational stability, and structural flexibility. With key advantages such as low cost, high efficiency, compact structure, and excellent portability, pc-LEDs based on these materials show great potential in the integration of intelligent optoelectronic devices. However, the design and synthesis of high-performance near-infrared luminescent materials remain a core research objective in this field.

[0003] Currently, Eu 2+ Mn 2+ Ni 2+ and Cr 3+ Activator ions have been extensively studied as broadband near-infrared emission centers. However, determining a suitable host lattice, such as Eu... 2+ and Mn 2+ Providing a sufficiently strong crystal field environment with ions to induce large crystal field splitting and achieve emission above 800 nm remains a significant challenge. It has been reported that Eu... 2+ or Mn 2+ Doped luminescent materials can achieve near-infrared emission, but the development of such systems still faces significant limitations. Ni 2+ Ions are considered promising broadband near-infrared emitters, with emission bands covering the NIR-II window (1000-1600 nm), but their emission efficiency remains relatively low. In contrast, Cr... 3+ The activated luminescent materials exhibit excellent broadband near-infrared emission properties. They show significant absorption in the blue region, and their emission wavelengths can be tuned over a broad spectral range of 600 to 1400 nm. The tuning effect is highly dependent on the intensity of the surrounding crystal field. In crystal fields of varying intensities, Cr... 3+ Ions (3d 3 Different emission modes can be exhibited: under a strong crystal field, spin-forbidden... 2 E→ 4 The A2 transition produces a sharp emission with a long lifetime (milliseconds), while under weaker crystal fields, spin-allowed emission... 4 T2→ 4 The A2 transition produces a broad emission band but a short lifetime (microseconds). Based on these characteristics, it is currently the most widely studied activated ion for broadband near-infrared luminescent materials. Cr 3+Activating luminescent materials has become one of the research hotspots for near-infrared materials used in LEDs in recent years. Summary of the Invention

[0004] The purpose of this invention is to provide an antimonate near-infrared luminescent material and its preparation method.

[0005] To achieve the above objectives, the technical solution adopted by this invention is as follows: its antimonate near-infrared luminescent material has the following chemical expression:

[0006] YGd(Sc 1-x-y Ga y SbO7: xCr 3+ ,

[0007] In the formula, x = 0.003~0.1, y = 0~0.97.

[0008] The preparation method of the antimonate near-infrared luminescent material of the present invention includes the following steps:

[0009] According to the chemical formula YGd(Sc) 1-x-y Ga y SbO7: xCr 3+ The corresponding raw materials are weighed according to the stoichiometric ratio. The raw materials are yttrium oxide, gadolinium oxide, scandium oxide, gallium oxide, antimony oxide and chromium oxide, where x = 0.003~0.1 and y = 0~0.97. The mixture is ground and mixed to obtain a mixture. The mixture is placed in a crucible and sintered in a high-temperature furnace at a specific atmosphere and 1100~1300℃ for 2~7 hours. After cooling to room temperature, the antimonate near-infrared luminescent material is obtained.

[0010] Furthermore, the specific atmosphere described in this invention is an air atmosphere.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] (1) The luminescent material of the present invention uses antimonate salt as the matrix material. Antimonate luminescent materials have the advantages of good chemical stability and thermal stability, and low sintering temperature. Compared with silicate near-infrared luminescent materials, the present invention has the advantages of low reaction temperature and simple synthesis process; compared with phosphate and aluminate near-infrared luminescent materials, the present invention has the advantages of good chemical stability and moisture resistance; compared with fluoride near-infrared luminescent materials, the present invention has the advantages of excellent chemical stability and thermal stability.

[0013] (2) This invention uses Cr 3+A near-infrared luminescent material was prepared as an activator. Compared with other antimonate green luminescent materials, its emission band is wider (half-width at half maximum of about 117 nm). In addition, the luminescent material has a wide excitation bandwidth, covering the violet and blue light regions. The excitation peak is located near 450 nm, which overlaps well with the emission peak of the blue light chip and can be effectively excited.

[0014] (3) By adding gallium oxide, the emission intensity of the sample can be significantly enhanced. Attached Figure Description

[0015] Figure 1 The X-ray diffraction (XRD) patterns of the luminescent materials prepared in the comparative examples and Examples 1-7 provided by this invention;

[0016] Figure 2 This invention provides emission spectra of the luminescent materials prepared in Examples 1-7 (excitation wavelength 450 nm);

[0017] Figure 3 The excitation (monitoring wavelength 763 nm) and emission spectrum (excitation wavelength 450 nm) of the luminescent material prepared in Example 4 of this invention are shown.

[0018] Figure 4 Scanning electron microscope (SEM) image of the luminescent material prepared in Example 4 of this invention;

[0019] Figure 5 The X-ray diffraction (XRD) patterns of the luminescent materials prepared in the comparative examples and Examples 8-12 provided by this invention;

[0020] Figure 6 Emission spectra of luminescent materials prepared in Examples 4 and 8-12 of this invention (excitation wavelength 450 nm).

[0021] Figure 7 Comparison of emission intensity of luminescent materials prepared in Examples 4 and 8-12 of this invention (excitation wavelength 450 nm). Detailed Implementation

[0022] Comparative Example:

[0023] According to YGdScSbO7, Y2O3, Gd2O3, Sc2O3 and Sb2O5 were weighed out in a molar ratio of 1:1:1:1. After being thoroughly ground and mixed evenly, the mixture was placed in an alumina crucible and then placed in a tube furnace and calcined at 1300℃ for 2 hours in an air atmosphere. After cooling to room temperature, antimonate near-infrared luminescent material was obtained.

[0024] from Figure 1As can be seen from the XRD pattern of the luminescent material in this embodiment, the trends of the d-value and relative intensity of the product are consistent with the standard data (ICSD-41717) of YGdScSbO7, indicating that the material synthesized in this embodiment has high purity.

[0025] Example 1:

[0026] According to YGd(Sc 1-x-y Ga y SbO7: xCr 3+ In the formula, x=0.003 and y=0, Y2O3, Gd2O3, Sc2O3, Sb2O5 and Cr2O3 are weighed out in a molar ratio of 1:1:0.997:1:0.003. After being thoroughly ground and mixed evenly, the mixture is placed in a corundum crucible and then placed in a tube furnace and calcined at 1100℃ for 7 hours in an air atmosphere. After cooling to room temperature, antimonate near-infrared luminescent material is obtained.

[0027] from Figure 1 As can be seen from the XRD pattern, the trends in the d-value and relative intensity of the luminescent material in this embodiment are consistent with the standard data (ICSD-41717) of YGdScSbO7, indicating that the material synthesized in this embodiment has high purity. The excitation spectrum of the luminescent material in this embodiment is a broad spectrum, covering both violet and blue light regions, with the excitation peak located near 450 nm. The high peak value indicates that the fluorescent material in this embodiment can be effectively excited by a blue light chip. When the excitation wavelength is 450 nm, from... Figure 2 As can be seen from the data, the emission of the luminescent material in this embodiment is broadband near-infrared emission of trivalent chromium ions, with the emission peak located near 763nm, indicating that the luminescent material in this embodiment is suitable as a near-infrared luminescent material excited by blue light.

[0028] Example 2:

[0029] According to YGd(Sc 1-x-y Ga y SbO7: xCr 3+ In the formula, x=0.005 and y=0, Y2O3, Gd2O3, Sc2O3, Sb2O5 and Cr2O3 are weighed out in a molar ratio of 1:1:0.995:1:0.005. After being thoroughly ground and mixed evenly, the mixture is placed in a corundum crucible and then placed in a tube furnace and calcined at 1200℃ for 5 hours in an air atmosphere. After cooling to room temperature, antimonate near-infrared luminescent material is obtained.

[0030] from Figure 1As can be seen from the XRD pattern, the trends in the d-value and relative intensity of the luminescent material in this embodiment are consistent with the standard data (ICSD-41717) of YGdScSbO7, indicating that the material synthesized in this embodiment has high purity. The excitation spectrum of the luminescent material in this embodiment is a broad spectrum, covering both violet and blue light regions, with the excitation peak located near 450 nm. The high peak value indicates that the fluorescent material in this embodiment can be effectively excited by a blue light chip. When the excitation wavelength is 450 nm, from... Figure 2 As can be seen from the data, the emission of the luminescent material in this embodiment is broadband near-infrared emission of trivalent chromium ions, with the emission peak located near 763nm, indicating that the luminescent material in this embodiment is suitable as a near-infrared luminescent material excited by blue light.

[0031] Example 3:

[0032] According to YGd(Sc 1-x-y Ga y SbO7: xCr 3+ In the formula, x=0.01, y=0, Y2O3, Gd2O3, Sc2O3, Sb2O5 and Cr2O3 are weighed out in a molar ratio of 1:1:0.99:1:0.01. After being thoroughly ground and mixed evenly, the mixture is placed in a corundum crucible and then placed in a tube furnace and calcined at 1250℃ for 4 hours in an air atmosphere. After cooling to room temperature, antimonate near-infrared luminescent material is obtained.

[0033] from Figure 1 As can be seen from the XRD pattern, the trends in the d-value and relative intensity of the luminescent material in this embodiment are consistent with the standard data (ICSD-41717) of YGdScSbO7, indicating that the material synthesized in this embodiment has high purity. The excitation spectrum of the luminescent material in this embodiment is a broad spectrum, covering both violet and blue light regions, with the excitation peak located near 450 nm. The high peak value indicates that the fluorescent material in this embodiment can be effectively excited by a blue light chip. When the excitation wavelength is 450 nm, from... Figure 2 As can be seen from the data, the emission of the luminescent material in this embodiment is broadband near-infrared emission of trivalent chromium ions, with the emission peak located near 763nm, indicating that the luminescent material in this embodiment is suitable as a near-infrared luminescent material excited by blue light.

[0034] Example 4:

[0035] According to YGd(Sc 1-x-y Ga y SbO7: xCr 3+In the formula, x=0.03 and y=0, Y2O3, Gd2O3, Sc2O3, Sb2O5 and Cr2O3 are weighed out in a molar ratio of 1:1:0.97:1:0.03. After being thoroughly ground and mixed evenly, the mixture is placed in a corundum crucible and then placed in a tube furnace and calcined at 1300℃ for 2 hours in an air atmosphere. After cooling to room temperature, antimonate near-infrared luminescent material is obtained.

[0036] from Figure 1 As can be seen from the XRD pattern, the trends in the d-value and relative intensity of the luminescent material in this embodiment are consistent with the standard data (ICSD-41717) for YGdScSbO7, indicating that the material synthesized in this embodiment has high purity. Figure 3 As can be seen, the excitation spectrum of the luminescent material in this embodiment is a broad spectrum, covering both violet and blue light regions, with the excitation peak located near 450 nm. The high peak value indicates that the fluorescent material in this embodiment can be effectively excited by a blue light chip. Under excitation with 450 nm wavelength light, the emission of the luminescent material in this embodiment is broadband near-infrared emission of trivalent chromium ions, with the emission peak located near 763 nm, indicating that the luminescent material in this embodiment is suitable as a near-infrared luminescent material excited by blue light. From... Figure 4 As can be seen from the above, the luminescent material in this embodiment has good dispersion, and the powder particle size is about 10 micrometers.

[0037] Example 5:

[0038] According to YGd(Sc 1-x-y Ga y SbO7: xCr 3+ In the formula, x=0.05 and y=0, Y2O3, Gd2O3, Sc2O3, Sb2O5 and Cr2O3 are weighed out in a molar ratio of 1:1:0.95:1:0.05. After being thoroughly ground and mixed evenly, the mixture is placed in a corundum crucible and then placed in a tube furnace and calcined at 1300℃ for 2 hours in an air atmosphere. After cooling to room temperature, antimonate near-infrared luminescent material is obtained.

[0039] from Figure 1 As can be seen from the XRD pattern, the trends in the d-value and relative intensity of the luminescent material in this embodiment are consistent with the standard data (ICSD-41717) of YGdScSbO7, indicating that the material synthesized in this embodiment has high purity. The excitation spectrum of the luminescent material in this embodiment is a broad spectrum, covering both violet and blue light regions, with the excitation peak located near 450 nm. The high peak value indicates that the fluorescent material in this embodiment can be effectively excited by a blue light chip. When the excitation wavelength is 450 nm, from... Figure 2As can be seen from the data, the emission of the luminescent material in this embodiment is broadband near-infrared emission of trivalent chromium ions, with the emission peak located near 763nm, indicating that the luminescent material in this embodiment is suitable as a near-infrared luminescent material excited by blue light.

[0040] Example 6:

[0041] According to YGd(Sc 1-x-y Ga y SbO7: xCr 3+ In the formula, x=0.07 and y=0, Y2O3, Gd2O3, Sc2O3, Sb2O5 and Cr2O3 are weighed out in a molar ratio of 1:1:0.93:1:0.07. After being thoroughly ground and mixed evenly, the mixture is placed in a corundum crucible and then placed in a tube furnace and calcined at 1300℃ for 2 hours in an air atmosphere. After cooling to room temperature, antimonate near-infrared luminescent material is obtained.

[0042] from Figure 1 As can be seen from the XRD pattern, the trends in the d-value and relative intensity of the luminescent material in this embodiment are consistent with the standard data (ICSD-41717) of YGdScSbO7, indicating that the material synthesized in this embodiment has high purity. The excitation spectrum of the luminescent material in this embodiment is a broad spectrum, covering both violet and blue light regions, with the excitation peak located near 450 nm. The high peak value indicates that the fluorescent material in this embodiment can be effectively excited by a blue light chip. When the excitation wavelength is 450 nm, from... Figure 2 As can be seen from the data, the emission of the luminescent material in this embodiment is broadband near-infrared emission of trivalent chromium ions, with the emission peak located near 763nm, indicating that the luminescent material in this embodiment is suitable as a near-infrared luminescent material excited by blue light.

[0043] Example 7:

[0044] According to YGd(Sc 1-x-y Ga y SbO7: xCr 3+ In the formula, x=0.1 and y=0, Y2O3, Gd2O3, Sc2O3, Sb2O5 and Cr2O3 are weighed out in a molar ratio of 1:1:0.9:1:0.1. After being thoroughly ground and mixed evenly, the mixture is placed in a corundum crucible and then placed in a tube furnace and calcined at 1250℃ for 4 hours in an air atmosphere. After cooling to room temperature, antimonate near-infrared luminescent material is obtained.

[0045] from Figure 1As can be seen from the XRD pattern, the trends in the d-value and relative intensity of the luminescent material in this embodiment are consistent with the standard data (ICSD-41717) of YGdScSbO7, indicating that the material synthesized in this embodiment has high purity. The excitation spectrum of the luminescent material in this embodiment is a broad spectrum, covering both violet and blue light regions, with the excitation peak located near 450 nm. The high peak value indicates that the fluorescent material in this embodiment can be effectively excited by a blue light chip. When the excitation wavelength is 450 nm, from... Figure 2 As can be seen from the data, the emission of the luminescent material in this embodiment is broadband near-infrared emission of trivalent chromium ions, with the emission peak located near 763nm, indicating that the luminescent material in this embodiment is suitable as a near-infrared luminescent material excited by blue light.

[0046] Example 8:

[0047] According to YGd(Sc 1-x-y Ga y SbO7: xCr 3+ In the formula, x=0.03, y=0.2. Y2O3, Gd2O3, Sc2O3, Ga2O3, Sb2O5 and Cr2O3 are weighed out with a molar ratio of 1:1:0.77:0.2:1:0.03. After being thoroughly ground and mixed evenly, the mixture is placed in a corundum crucible and then placed in a tube furnace and calcined at 1300℃ for 2 hours in an air atmosphere. After cooling to room temperature, antimonate near-infrared luminescent material is obtained.

[0048] from Figure 5 As can be seen from the XRD pattern, the trends in the d-value and relative intensity of the luminescent material in this embodiment are consistent with the standard data (ICSD-41717) of YGdScSbO7, indicating that the material synthesized in this embodiment has high purity. The excitation spectrum of the luminescent material in this embodiment is a broad spectrum, covering both violet and blue light regions, with the excitation peak located near 450 nm. The high peak value indicates that the fluorescent material in this embodiment can be effectively excited by a blue light chip. When the excitation wavelength is 450 nm, from... Figure 6 As can be seen from the data, the emission of the luminescent material in this embodiment is broadband near-infrared emission of trivalent chromium ions, with the emission peak located near 763 nm, indicating that the luminescent material in this embodiment is suitable as a blue-light-excited near-infrared luminescent material. Figure 7 As can be seen, the emission intensity of the luminescent material in this embodiment is increased compared with that in embodiment 4, indicating that the addition of Ga2O3 can enhance the emission of trivalent chromium ions.

[0049] Example 9:

[0050] According to YGd(Sc 1-x-y Ga y SbO7: xCr 3+In the formula, x=0.03, y=0.4. Y2O3, Gd2O3, Sc2O3, Ga2O3, Sb2O5 and Cr2O3 are weighed out with a molar ratio of 1:1:0.57:0.4:1:0.03. After being thoroughly ground and mixed evenly, the mixture is placed in a corundum crucible and then placed in a tube furnace and calcined at 1300℃ for 2 hours in air atmosphere. After cooling to room temperature, antimonate near-infrared luminescent material is obtained.

[0051] from Figure 5 As can be seen from the XRD pattern, the trends in the d-value and relative intensity of the luminescent material in this embodiment are consistent with the standard data (ICSD-41717) of YGdScSbO7, indicating that the material synthesized in this embodiment has high purity. The excitation spectrum of the luminescent material in this embodiment is a broad spectrum, covering both violet and blue light regions, with the excitation peak located near 450 nm. The high peak value indicates that the fluorescent material in this embodiment can be effectively excited by a blue light chip. When the excitation wavelength is 450 nm, from... Figure 6 As can be seen from the data, the emission of the luminescent material in this embodiment is broadband near-infrared emission of trivalent chromium ions, with the emission peak located near 763 nm, indicating that the luminescent material in this embodiment is suitable as a blue-light-excited near-infrared luminescent material. Figure 7 As can be seen, the emission intensity of the luminescent material in this embodiment is increased compared with that in embodiment 4, indicating that the addition of Ga2O3 can enhance the emission of trivalent chromium ions.

[0052] Example 10:

[0053] According to YGd(Sc 1-x-y Ga y SbO7: xCr 3+ In the formula, x=0.03, y=0.6. Y2O3, Gd2O3, Sc2O3, Ga2O3, Sb2O5 and Cr2O3 are weighed out with a molar ratio of 1:1:0.37:0.6:1:0.03. After being thoroughly ground and mixed evenly, the mixture is placed in a corundum crucible and then placed in a tube furnace and calcined at 1300℃ for 2 hours in an air atmosphere. After cooling to room temperature, antimonate near-infrared luminescent material is obtained.

[0054] from Figure 5 As can be seen from the XRD pattern, the trends in the d-value and relative intensity of the luminescent material in this embodiment are consistent with the standard data (ICSD-41717) of YGdScSbO7, indicating that the material synthesized in this embodiment has high purity. The excitation spectrum of the luminescent material in this embodiment is a broad spectrum, covering both violet and blue light regions, with the excitation peak located near 450 nm. The high peak value indicates that the fluorescent material in this embodiment can be effectively excited by a blue light chip. When the excitation wavelength is 450 nm, from... Figure 6As can be seen from the data, the emission of the luminescent material in this embodiment is broadband near-infrared emission of trivalent chromium ions, with the emission peak located near 763 nm, indicating that the luminescent material in this embodiment is suitable as a blue-light-excited near-infrared luminescent material. Figure 7 As can be seen, the emission intensity of the luminescent material in this embodiment is increased compared with that in embodiment 4, indicating that the addition of Ga2O3 can enhance the emission of trivalent chromium ions.

[0055] Example 11:

[0056] According to YGd(Sc 1-x-y Ga y SbO7: xCr 3+ In the formula, x=0.03, y=0.8. Y2O3, Gd2O3, Sc2O3, Ga2O3, Sb2O5 and Cr2O3 are weighed out with a molar ratio of 1:1:0.17:0.8:1:0.03. After being thoroughly ground and mixed evenly, the mixture is placed in a corundum crucible and then placed in a tube furnace and calcined at 1300℃ for 2 hours in an air atmosphere. After cooling to room temperature, antimonate near-infrared luminescent material is obtained.

[0057] from Figure 5 As can be seen from the XRD pattern, the trends in the d-value and relative intensity of the luminescent material in this embodiment are consistent with the standard data (ICSD-41717) of YGdScSbO7, indicating that the material synthesized in this embodiment has high purity. The excitation spectrum of the luminescent material in this embodiment is a broad spectrum, covering both violet and blue light regions, with the excitation peak located near 450 nm. The high peak value indicates that the fluorescent material in this embodiment can be effectively excited by a blue light chip. When the excitation wavelength is 450 nm, from... Figure 6 As can be seen from the data, the emission of the luminescent material in this embodiment is broadband near-infrared emission of trivalent chromium ions, with the emission peak located near 763 nm, indicating that the luminescent material in this embodiment is suitable as a blue-light-excited near-infrared luminescent material. Figure 7 As can be seen from the data, the emission intensity of the luminescent material in this embodiment is 9.2 times higher than that in embodiment 4, indicating that the addition of Ga2O3 can enhance the emission of trivalent chromium ions.

[0058] Example 12:

[0059] According to YGd(Sc 1-x-y Ga y SbO7: xCr 3+In the formula, x=0.03 and y=1, Y2O3, Gd2O3, Ga2O3, Sb2O5 and Cr2O3 are weighed out in a molar ratio of 1:1:0.97:1:0.03. After being thoroughly ground and mixed evenly, the mixture is placed in a corundum crucible and then placed in a tube furnace and calcined at 1300℃ for 2 hours in an air atmosphere. After cooling to room temperature, antimonate near-infrared luminescent material is obtained.

[0060] from Figure 5 As can be seen from the XRD pattern, the trends in the d-value and relative intensity of the luminescent material in this embodiment are consistent with the standard data (ICSD-41717) of YGdScSbO7, indicating that the material synthesized in this embodiment has high purity. The excitation spectrum of the luminescent material in this embodiment is a broad spectrum, covering both violet and blue light regions, with the excitation peak located near 450 nm. The high peak value indicates that the fluorescent material in this embodiment can be effectively excited by a blue light chip. When the excitation wavelength is 450 nm, from... Figure 6 As can be seen from the data, the emission of the luminescent material in this embodiment is broadband near-infrared emission of trivalent chromium ions, with the emission peak located near 763 nm, indicating that the luminescent material in this embodiment is suitable as a blue-light-excited near-infrared luminescent material. Figure 7 As can be seen from the data, the emission intensity of the luminescent material in this embodiment is increased compared with that in embodiment 4, indicating that the addition of Ga2O3 can enhance the emission of trivalent chromium ions.

[0061] The above embodiments are used to explain and illustrate the present invention, but not to limit the present invention. Any modifications and changes made to the present invention within the spirit and scope of the claims shall fall within the protection scope of the present invention.

Claims

1. An antimonate near-infrared luminescent material, characterized in that, The luminescent material has the following chemical formula: YGd(Sc 1-x-y Ga y SbO7: xCr 3+ In the formula, x = 0.003~0.1, y = 0~0.

97.

2. A method for preparing the antimonate near-infrared luminescent material according to claim 1, characterized in that... Includes the following steps: According to the chemical formula YGd(Sc) 1-x-y Ga y SbO7: xCr 3+ The corresponding raw materials are weighed according to the stoichiometric ratio. The raw materials are yttrium oxide, gadolinium oxide, scandium oxide, gallium oxide, antimony oxide and chromium oxide, where x = 0.003~0.1 and y = 0~1. The mixture is ground and mixed to obtain a mixture. The mixture is placed in a crucible and sintered in a high-temperature furnace at a specific atmosphere and 1100~1300℃ for 2~7 hours. After cooling to room temperature, the antimonate near-infrared luminescent material is obtained.

3. The method for preparing antimonate near-infrared luminescent materials as described in claim 2, characterized in that: The specific atmosphere referred to is the air atmosphere.

Images