CN111778026B - Temperature sensing fluorescent powder based on co-doped rare earth ion luminescence characteristics and preparation method thereof - Google Patents
Temperature sensing fluorescent powder based on co-doped rare earth ion luminescence characteristics and preparation method thereof Download PDFInfo
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Abstract
The invention relates to the technical field of remote temperature measurement, in particular to molybdate fluorescent powder and a preparation method thereof. The invention aims to solve the problem that the relative sensitivity of a temperature sensing material adopted by the existing fluorescence intensity ratio type optical temperature sensor is low. The general chemical formula of the temperature sensing fluorescent powder is NaM 1‑x‑ y Pr x Tb y (MoO 4 ) 2 M represents La or Y, wherein x is more than or equal to 0.01 and less than or equal to 0.02, and Y is more than or equal to 0.02 and less than or equal to 0.05. The method comprises the following steps: weighing nitrate mixture corresponding to each rare earth element as a raw material, and dissolving the raw material into deionized water to prepare a rare earth solution; preparing a sodium molybdate solution; slowly dripping the sodium molybdate solution into the rare earth solution, magnetically stirring, heating in a reaction kettle for reaction to obtain white turbid liquid, centrifugally separating precipitates in the white turbid liquid, drying, grinding and sintering to obtain the temperature sensing fluorescent powder. The invention is used for the technical field of remote temperature measurement.
Description
Technical Field
The invention relates to the technical field of remote temperature measurement, in particular to molybdate fluorescent powder and a preparation method thereof.
Background
At present, most temperature sensors in the market adopt a liquid thermometer, a thermocouple and the like to measure the temperature by contacting with an object to be measured. However, in some environments, such as high-voltage power transmission, highly toxic environments and the like, the traditional contact thermometer cannot perform measurement, and a remote temperature measurement technology is needed, so that it is very important to explore a novel non-contact temperature measurement technology. In recent years, the research on temperature sensing materials activated by rare earth ions has become one of the main directions of non-contact temperature measurement technology, and at present, optical temperature sensing technology based on rare earth ion luminescence can be divided into three types in principle: (1) The fluorescence intensity type temperature sensing is used for temperature sensing according to the change relation of the luminous intensity along with the temperature, is simple to operate, is simple and convenient to process data, but the luminous intensity is easily influenced by experimental conditions, and increases the error of experimental data. (2) Fluorescence lifetime type temperature sensing is used for measuring the change relation between fluorescence lifetime and temperature, the fluorescence lifetime measurement is basically not influenced by excitation intensity and the angle of a sample, and more accurate temperature measurement can be realized. (3) The Fluorescence Intensity Ratio (FIR) type optical temperature sensing measures the relationship between the ratio of fluorescence intensity emitted from the thermal coupling energy level of rare earth ions and temperature, overcomes the defect of single-energy level fluorescence intensity temperature measurement, has simple experimental operation, and is the best temperature sensing mode at present. The main parameters reflecting the property of the fluorescence intensity ratio type temperature sensing material include sensitivity, relative sensitivity and the like, wherein the main parameter for evaluating the performance of the fluorescence intensity ratio type temperature sensing material is the relative sensitivity, but the relative sensitivity of the current temperature sensing material is lower, so that the temperature sensing material with higher relative sensitivity needs to be searched.
The reported single-doped temperature sensing fluorescent powder with application prospect mainly uses Er 3+ Using Er as luminescent center 3+ Two thermally coupled energy levels: ( 4 S 3/2 And 2 H 11/2 ) Intensity ratio of luminescence to temperature, but Er 3+ A 980nm laser source is required as a luminescence center for excitation, and the resulting thermal effect adversely affects the measurement accuracy of temperature. And Er 3+ The two thermal coupling energy levels are green light emitting, the colors are relatively close, and the change of the temperature cannot be intuitively reflected through the change of the light emitting colors. In addition, er is used 3+ The self structure is limited, the relative sensitivity of the prepared fluorescent powder is 0.7 to 1 percent -1 Further improvement is difficult. Eu is mainly utilized by the emerging co-doped temperature sensing fluorescent powder in recent years 3+ And Tb 3+ As a luminescence center, eu changes depending on temperature although the co-doped luminescence color changes 3+ And Tb 3+ The thermal quenching trend difference is not very large, so the change range of the luminescent color is small, and the practical application significance is not large. Eu (Eu) 3+ And Tb 3+ The fluorescence intensity ratio of (A) does not change significantly with temperature, the relative sensitivity can only reach 1.2% -1 Left and right, compared with Er 3+ The degree of improvement of the single-doped fluorescent powder is limited.
Disclosure of Invention
The invention provides temperature sensing fluorescent powder based on the luminescent characteristic of co-doped rare earth ions and a preparation method thereof, aiming at solving the problem that the relative sensitivity of a temperature sensing material adopted by the existing fluorescence intensity ratio type optical temperature sensor is low.
Temperature sensing fluorescent powder based on co-doped rare earth ion luminescence characteristic and having chemical general formula of NaM 1-x-y Pr x Tb y (MoO 4 ) 2 M represents La or Y, wherein x is more than or equal to 0.01 and less than or equal to 0.02, and Y is more than or equal to 0.02 and less than or equal to 0.05.
The preparation method of the temperature sensing fluorescent powder based on the light-emitting characteristic of the co-doped rare earth ions is carried out according to the following steps:
1. nitrate corresponding to each element is weighed and mixed as a raw material according to the molar ratio (1-x-Y) of M, pr and Tb, wherein M represents La or Y, x is more than or equal to 0.01 and less than or equal to 0.02, and Y is more than or equal to 0.02 and less than or equal to 0.05; dissolving raw materials in deionized water to prepare a rare earth solution; the concentration of the rare earth solution is 0.12-0.13 mol/L; wherein the concentration of Pr element is 0.00125 mol/L-0.0025 mol/L, and the concentration of Tb element is 0.0025 mol/L-0.00625 mol/L; the concentration of the element expressed by M is 0.11625 mol/L-0.12125 mol/L;
2. na is mixed with 2 MoO 4 ·2H 2 Dissolving O in deionized water to prepare molybdate solution; the concentration of the molybdate solution is 0.4-0.6 mol/L;
3. slowly dripping molybdate solution into the rare earth solution, magnetically stirring for 15-20 min, pouring the obtained solution into a reaction kettle, transferring the solution into an oven, and heating for 20-24 h at 160-180 ℃ to obtain white turbid solution;
4. transferring the white turbid liquid into a centrifugal tube, performing centrifugal separation to obtain a precipitate, and drying the precipitate in a drying oven at the temperature of 60-80 ℃ for 6-8 h; and pouring the dried precipitate into a mortar, grinding the dried precipitate into powder, placing the mortar into a muffle furnace, sintering the mortar for 1 to 2 hours at the temperature of between 500 and 600 ℃, and cooling the mortar to room temperature along with the furnace to obtain the temperature sensing fluorescent powder based on the luminescent property of the co-doped rare earth ions.
The beneficial effects of the invention are:
the invention selects and uses the alkali metal-rare earth dimolybdate (NaM: (B))MoO 4 ) 2 M represents La or Y) as a host material because such molybdate has advantages of good thermal stability, chemical stability, light conversion efficiency, and the like. By using Tb 3+ And Pr 3+ As a luminescence center, the fluorescent powder prepared by the method can obtain green luminescence with the main peak of about 545nm and red luminescence with the main peak of about 605nm under the excitation of ultraviolet light, and the green luminescence and the red luminescence are respectively originated from Tb 3+ ( 5 D 4 - 7 F 5 ) And Pr 3+ ( 1 D 2 - 3 H 4 ) The transition of (2) emits light. The fluorescent powder prepared by the invention is excited by 270nm ultraviolet fluorescence, so that the influence of thermal effect generated by laser on temperature measurement is avoided. In addition, pr 3+ Slow thermal quenching of red light, tb 3+ The green light thermal quenching is obvious, so that the luminescent color of the fluorescent powder can realize continuous change from green to red, and the problem that the temperature change cannot be visually observed through the luminescent color is solved. Pr (Pr) of 3+ And Tb 3+ The fluorescence intensity ratio of (A) is obviously changed along with the temperature, the relative sensitivity is greatly improved and can reach 2.6 percent -1 Compared with the existing temperature sensing fluorescent powder, the fluorescent powder has obvious improvement.
In terms of preparation methods, common fluorescent powder preparation methods comprise a high-temperature solid phase method, a coprecipitation method, a sol-gel method and the like, but have the defects of long reaction time, high preparation temperature, difficult shape control, uneven doping, huge energy consumption and the like.
Drawings
FIG. 1 is an X-ray diffraction pattern of a temperature-sensing phosphor based on the luminescence property of a co-doped rare earth ion prepared in example 1;
FIG. 2 is an excitation spectrum of the temperature sensing phosphor based on the luminescence property of the co-doped rare earth ion prepared in example 1; wherein 1 represents the monitored emission wavelength λ em =605nm,2 denotes the monitoring emission wavelength λ em ＝545nm；
FIG. 3 is an emission spectrum of the temperature sensing phosphor based on the co-doped rare earth ion luminescence property prepared in example 1 when excited by 270nm ultraviolet light at room temperature;
FIG. 4 is a temperature dependent emission spectrum of the temperature sensing phosphor based on the co-doped rare earth ion luminescence property prepared in example 1 under 270nm ultraviolet excitation;
FIG. 5 is a graph showing the relationship between the fluorescence intensity ratio and the temperature of the temperature sensing phosphor based on the luminescence property of the co-doped rare earth ion prepared in example 1;
FIG. 6 is a graph showing the relationship between the sensitivity and the temperature of the temperature-sensitive phosphor based on the luminescence property of the co-doped rare earth ion prepared in example 1;
FIG. 7 is a graph showing the relationship between the relative sensitivity and temperature of a temperature-sensitive phosphor based on the luminescence property of co-doped rare earth ions prepared in example 1;
fig. 8 is a graph of luminescent color coordinates of the temperature sensing phosphor based on the luminescent characteristics of the co-doped rare earth ions prepared in example 1.
Detailed Description
The first embodiment is as follows: the general chemical formula of the temperature sensing fluorescent powder based on the luminescent property of the co-doped rare earth ions is NaM 1-x-y Pr x Tb y (MoO 4 ) 2 M represents La or Y, wherein x is more than or equal to 0.01 and less than or equal to 0.02, and Y is more than or equal to 0.02 and less than or equal to 0.05.
In this embodiment, when the value of x is less than 0.01, the luminance of the phosphor is too low, and when x is greater than 0.02, significant concentration quenching may occur. The phosphor brightness is too low for y values less than 0.02 and significant concentration quenching may occur for y values greater than 0.05.
The second embodiment is as follows: the first difference between the present embodiment and the specific embodiment is: the temperature sensing fluorescent powder based on the co-doped rare earth ion luminescence characteristic obtains green luminescence with main peak at 545nm and red luminescence at 605nm under the excitation of ultraviolet light. The rest is the same as the first embodiment.
The third concrete implementation mode: the present embodiment differs from the first or second embodiment in that: x =0.01, y =0.03. The others are the same as in the first or second embodiment.
The fourth concrete implementation mode: the difference between this embodiment mode and one of the first to third embodiment modes is: x =0.01, y =0.04. The rest is the same as one of the first to third embodiments.
The fifth concrete implementation mode: the preparation method of the temperature sensing fluorescent powder based on the light emitting characteristic of the co-doped rare earth ions is carried out according to the following steps:
1. nitrate corresponding to each element is weighed and mixed as a raw material according to the molar ratio (1-x-Y) of M, pr and Tb, wherein M represents La or Y, x is more than or equal to 0.01 and less than or equal to 0.02, and Y is more than or equal to 0.02 and less than or equal to 0.05; dissolving raw materials in deionized water to prepare a rare earth solution; the concentration of the rare earth solution is 0.12-0.13 mol/L; wherein, the concentration of Pr element is 0.00125mol/L to 0.0025mol/L, and the concentration of Tb element is 0.0025mol/L to 0.00625mol/L; the concentration of the element expressed by M is 0.11625 mol/L-0.12125 mol/L;
2. mixing Na 2 MoO 4 ·2H 2 Dissolving O in deionized water to prepare molybdate solution; the concentration of the molybdate solution is 0.4-0.6 mol/L;
3. slowly dripping molybdate solution into rare earth solution, magnetically stirring for 15-20 min, pouring the obtained solution into a reaction kettle, transferring the solution into an oven, and heating for 20-24 h at 160-180 ℃ to obtain white turbid solution;
4. transferring the white turbid liquid into a centrifuge tube, carrying out centrifugal separation to obtain a precipitate, and drying the precipitate in a drying oven for 6-8 h at the temperature of 60-80 ℃; and pouring the dried precipitate into a mortar, grinding the dried precipitate into powder, placing the mortar into a muffle furnace, sintering the mortar for 1 to 2 hours at the temperature of between 500 and 600 ℃, and cooling the sintered mortar to room temperature along with the furnace to obtain the temperature sensing fluorescent powder based on the luminescent characteristic of the co-doped rare earth ions.
The fluorescent powder prepared by the embodiment can obtain green luminescence with the main peak positioned at about 545nm and red luminescence with the main peak positioned at about 605nm under the excitation of ultraviolet light, and the green luminescence and the red luminescence are respectively originated from Tb 3+ ( 5 D 4 - 7 F 5 ) And Pr 3+ ( 1 D 2 - 3 H 4 ) The transition of (2) emits light. Due to, tb 3+ And Pr 3+ Different thermal quenching tendency of luminescence, tb 3+ Green light thermal quenching tendency ratio Pr of 3+ The red light thermal quenching trend is more obvious, so, pr 3+ And Tb 3+ The fluorescence intensity ratio of the luminescence will increase with increasing temperature, and the temperature can be characterized by the fluorescence intensity ratio. In addition, due to Pr 3+ And Tb 3+ The color of the light emitted is different, and the color of the phosphor also changes significantly with temperature. In summary, optical temperature sensing can be achieved by using the fluorescence intensity ratio of rare earth ions. The following formula is followed to characterize temperature:
(1) Fluorescence intensity ratio:
R＝B+Cexp(-ΔE/K B T)
(2) Sensitivity:
(3) Relative sensitivity:
Δ E, B and C are constants associated with the material, K B Is the boltzmann constant and T is the thermodynamic temperature.
The sixth specific implementation mode is as follows: the fifth embodiment is different from the specific embodiment in that: the concentration of the rare earth solution in the first step is 0.125mol/L. The rest is the same as the fifth embodiment.
The seventh concrete implementation mode: the fifth or sixth embodiment is different from the fifth or sixth embodiment in that: and the concentration of the molybdate solution in the second step is 0.5mol/L. The other is the same as the fifth or sixth embodiment.
The following examples were used to demonstrate the beneficial effects of the present invention:
example 1:
NaY 0.94 Pr 0.01 Tb 0.05 (MoO 4 ) 2 the synthesis of (2):
1. 1.8001gY (NO) 3 ) 3 ·6H 2 O、0.1088g Tb(NO 3 ) 3 ·5H 2 O and 0.0218g Pr (NO) 3 ) 3 ·6H 2 Dissolving O in 40mL of deionized water to prepare a rare earth solution;
2. 2.4195g Na 2 MoO 4 ·2H 2 Dissolving O in 20mL of deionized water to prepare a molybdate solution;
3. slowly dripping molybdate solution into the rare earth solution, magnetically stirring for 20min, pouring the obtained solution into a stainless steel reaction kettle with a 100ml polytetrafluoroethylene inner container, transferring the solution into an oven, and heating for 24h at the temperature of 180 ℃ to obtain white turbid solution;
4. transferring the white turbid liquid into a centrifugal tube, performing centrifugal separation to obtain a precipitate, and drying the precipitate in a drying oven at the temperature of 80 ℃ for 8 hours; and pouring the dried precipitate into a mortar, grinding the dried precipitate into powder, placing the mortar into a muffle furnace, sintering the mortar for 2 hours at the temperature of 600 ℃, and cooling the mortar to room temperature along with the furnace to obtain the temperature sensing fluorescent powder based on the luminescent characteristic of the co-doped rare earth ions.
As can be seen from FIGS. 1 to 8, the phosphor can obtain green light emission with a main peak at about 545nm and red light emission at about 605nm under the excitation of ultraviolet light. Pr experimental monitoring 3+ And Tb 3+ The fluorescence intensity is obviously quenched compared with the red light, the temperature is represented by the ratio of the fluorescence intensities of the two rare earth ions, the fluorescence intensity ratio, the sensitivity and the relative sensitivity are calculated according to a formula, the Fluorescence Intensity Ratio (FIR) value of the obtained temperature sensing material is obviously changed within the range of 298K-483K, the light-emitting color range is large, the green color is changed into the red color, and the temperature measuring performance of the fluorescent powder is proved to be excellent.
Example 2:
NaY 0.97 Pr 0.01 Tb 0.02 (MoO 4 ) 2 the synthesis of (2):
1. 1.8576gY (NO) 3 ) 3 ·6H 2 O、0.0435g Tb(NO 3 ) 3 ·5H 2 O and 0.0218g Pr (NO) 3 ) 3 ·6H 2 Dissolving O in 40mL of deionized water to prepare a rare earth solution;
2. 2.4195g Na 2 MoO 4 ·2H 2 Dissolving O in 20mL of deionized water to prepare a molybdate solution;
3. slowly dripping molybdate solution into the rare earth solution, magnetically stirring for 20min, pouring the obtained solution into a stainless steel reaction kettle with a 100ml polytetrafluoroethylene inner container, transferring the solution into an oven, and heating for 24h at the temperature of 180 ℃ to obtain white turbid solution;
4. transferring the white turbid liquid into a centrifugal tube, performing centrifugal separation to obtain a precipitate, and drying the precipitate in a drying oven at the temperature of 80 ℃ for 8 hours; and pouring the dried precipitate into a mortar, grinding the dried precipitate into powder, placing the mortar into a muffle furnace, sintering the mortar for 2 hours at the temperature of 600 ℃, and cooling the mortar to room temperature along with the furnace to obtain the temperature sensing fluorescent powder based on the luminescent property of the co-doped rare earth ions.
The fluorescent powder can obtain green luminescence with main peak around 545nm and red luminescence with main peak around 605nm under the excitation of ultraviolet light (270 nm).
Example 3:
NaY 0.96 Pr 0.01 Tb 0.03 (MoO 4 ) 2 the synthesis of (2):
1. 1.8384gY (NO) 3 ) 3 ·6H 2 O、0.0653g Tb(NO 3 ) 3 ·5H 2 O and 0.0218g Pr (NO) 3 ) 3 ·6H 2 Dissolving O in 40mL of deionized water to prepare a rare earth solution;
2. 2.4195g of Na 2 MoO 4 ·2H 2 Dissolving O in 20mL of deionized water to prepare a molybdate solution;
3. slowly dripping molybdate solution into rare earth solution, magnetically stirring for 20min, pouring the obtained solution into a stainless steel reaction kettle with a 100ml polytetrafluoroethylene inner container, transferring the solution into an oven, and heating for 24h at 180 ℃ to obtain white turbid solution;
4. transferring the white turbid liquid into a centrifuge tube, carrying out centrifugal separation to obtain a precipitate, and drying the precipitate in a drying oven for 8 hours at the temperature of 80 ℃; and pouring the dried precipitate into a mortar, grinding the dried precipitate into powder, placing the mortar into a muffle furnace, sintering the mortar for 2 hours at the temperature of 600 ℃, and cooling the mortar to room temperature along with the furnace to obtain the temperature sensing fluorescent powder based on the luminescent characteristic of the co-doped rare earth ions.
The fluorescent powder can obtain green luminescence with main peak around 545nm and red luminescence with main peak around 605nm under the excitation of ultraviolet light (270 nm).
Example 4:
NaY 0.95 Pr 0.01 Tb 0.04 (MoO 4 ) 2 the synthesis of (2):
1. 1.8193gY (NO) 3 ) 3 ·6H 2 O、0.0870g Tb(NO 3 ) 3 ·5H 2 O and 0.0218g Pr (NO) 3 ) 3 ·6H 2 Dissolving O in 40mL of deionized water to prepare a rare earth solution;
2. 2.4195g Na 2 MoO 4 ·2H 2 Dissolving O in 20mL of deionized water to prepare a molybdate solution;
3. slowly dripping molybdate solution into the rare earth solution, magnetically stirring for 20min, pouring the obtained solution into a stainless steel reaction kettle with a 100ml polytetrafluoroethylene inner container, transferring the solution into an oven, and heating for 24h at the temperature of 180 ℃ to obtain white turbid solution;
4. transferring the white turbid liquid into a centrifuge tube, carrying out centrifugal separation to obtain a precipitate, and drying the precipitate in a drying oven for 8 hours at the temperature of 80 ℃; and pouring the dried precipitate into a mortar, grinding the dried precipitate into powder, placing the mortar into a muffle furnace, sintering the mortar for 2 hours at the temperature of 600 ℃, and cooling the mortar to room temperature along with the furnace to obtain the temperature sensing fluorescent powder based on the luminescent characteristic of the co-doped rare earth ions.
The fluorescent powder can obtain green luminescence with main peak around 545nm and red luminescence with main peak around 605nm under the excitation of ultraviolet light (270 nm).
Example 5:
NaY 0.96 Pr 0.02 Tb 0.02 (MoO 4 ) 2 the synthesis of (2):
1. 1.8384gY (NO) 3 ) 3 ·6H 2 O、0.0435g Tb(NO 3 ) 3 ·5H 2 O and 0.0435g Pr (NO) 3 ) 3 ·6H 2 Dissolving O in 40mL of deionized water to prepare a rare earth solution;
2. 2.4195g Na 2 MoO 4 ·2H 2 Dissolving O in 20mL of deionized water to prepare a molybdate solution;
3. slowly dripping molybdate solution into the rare earth solution, magnetically stirring for 20min, pouring the obtained solution into a stainless steel reaction kettle with a 100ml polytetrafluoroethylene inner container, transferring the solution into an oven, and heating for 24h at the temperature of 180 ℃ to obtain white turbid solution;
4. transferring the white turbid liquid into a centrifugal tube, performing centrifugal separation to obtain a precipitate, and drying the precipitate in a drying oven at the temperature of 80 ℃ for 8 hours; and pouring the dried precipitate into a mortar, grinding the dried precipitate into powder, placing the mortar into a muffle furnace, sintering the mortar for 2 hours at the temperature of 600 ℃, and cooling the mortar to room temperature along with the furnace to obtain the temperature sensing fluorescent powder based on the luminescent property of the co-doped rare earth ions.
The fluorescent powder can obtain green luminescence with main peak around 545nm and red luminescence with main peak around 605nm under the excitation of ultraviolet light (270 nm).
Claims (1)
1. A temperature sensing fluorescent powder based on the luminescent characteristic of co-doped rare earth ions is characterized in that the chemical formula of the temperature sensing fluorescent powder based on the luminescent characteristic of the co-doped rare earth ions is NaY 0.94 Pr 0.01 Tb 0.05 (MoO 4 ) 2 ；
The preparation method of the temperature sensing fluorescent powder based on the luminescent characteristic of the co-doped rare earth ions is carried out according to the following steps:
1. 1.8001gY (NO) 3 ) 3 ·6H 2 O、0.1088g Tb(NO 3 ) 3 ·5H 2 O and 0.0218g Pr (NO) 3 ) 3 ·6H 2 Dissolving O in 40mL of deionized water to prepare a rare earth solution;
2. 2.4195g of Na 2 MoO 4 ·2H 2 Dissolving O in 20mL of deionized water to prepare a molybdate solution;
3. slowly dripping molybdate solution into rare earth solution, magnetically stirring for 20min, pouring the obtained solution into a stainless steel reaction kettle with a 100ml polytetrafluoroethylene inner container, transferring the solution into an oven, and heating for 24h at 180 ℃ to obtain white turbid solution;
4. transferring the white turbid liquid into a centrifugal tube, performing centrifugal separation to obtain a precipitate, and drying the precipitate in a drying oven at the temperature of 80 ℃ for 8 hours; and pouring the dried precipitate into a mortar, grinding the dried precipitate into powder, placing the mortar into a muffle furnace, sintering the mortar for 2 hours at the temperature of 600 ℃, and cooling the mortar to room temperature along with the furnace to obtain the temperature sensing fluorescent powder based on the luminescent characteristic of the co-doped rare earth ions.
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| CN101781555A (en) * | 2009-01-16 | 2010-07-21 | 中国科学院福建物质结构研究所 | Deep red phosphor powder suitable to be excited by blue LED, preparation method thereof, and electric light source made by same |
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| CN101781555A (en) * | 2009-01-16 | 2010-07-21 | 中国科学院福建物质结构研究所 | Deep red phosphor powder suitable to be excited by blue LED, preparation method thereof, and electric light source made by same |
Non-Patent Citations (2)
| Title |
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| A Novel Optical Thermometry Strategy Based on Diverse Thermal Response from Two Intervalence Charge Transfer States;Yan Gao et al.;《Adv. Funct. Mater》;20160224;第26卷;第3139-3145页 * |
| Synthesis and optical temperature sensing performance of NaLa(MoO4)2:Tb3+, Eu3+ phosphors;Lixin Peng et al.;《Ceramics International》;20190704;第45卷;第20656-20663页 * |
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