YTaO4: Er < 3 + > / Yb < 3 + > coated 8YSZ: Er < 3 + > / Yb < 3 + > core-shell structure thermal barrier coating fluorescence temperature probe and preparation method thereof
By preparing a fluorescent temperature probe with a core-shell structure of YTaO4:Er3+/Yb3+@8YSZ:Er3+/Yb3+ thermal barrier coating, the shortcomings of thermal barrier coating materials in temperature monitoring were overcome, and high-sensitivity temperature detection and coating performance improvement were achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-26
- Publication Date
- 2026-03-27
AI Technical Summary
Existing thermal barrier coating materials are inadequate in monitoring internal temperatures, making it difficult to detect localized overheating in real time and assess operating conditions, which can lead to potential failures and catastrophic damage.
A core-shell structured YTaO4:Er3+/Yb3+@8YSZ:Er3+/Yb3+ thermal barrier coating fluorescent temperature probe was prepared using the sol-gel method and the hydrothermal method. By combining YTaO4:Er3+/Yb3+ as the core material and 8YSZ:Er3+/Yb3+ as the shell material, both fluorescence performance and tight bonding with the substrate were achieved.
It achieves highly sensitive temperature monitoring, can emit green light under 980 nm excitation, provides real-time temperature information, improves the bonding strength and thermal fatigue life of the coating, and has good fluorescence performance.
Smart Images
Figure CN121736751A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application belongs to the field of preparation of ceramic materials and luminescence technology, and particularly relates to a core-shell structure YTaO4: Er 3+ / Yb 3+ @8YSZ: Er 3+ / Yb 3+ Thermal barrier coating fluorescent temperature probe and preparation method thereof. BACKGROUND
[0002] Temperature sensing technology transforms thermal barrier coatings (TBCs) from passive thermal insulation components to "smart" sensing layers that can actively report their health status. During engine operation, TBC failure can lead to overheating and melting of the underlying metal substrate. This failure is often caused by excessive growth of the thermally grown oxide (TGO) layer, sintering, or spallation of the ceramic layer, which are closely related to temperature and time. Therefore, real-time monitoring of the internal temperature of the thermal section component is crucial for evaluating coating integrity and predicting failure. Real-time temperature sensing can detect local overheating early and provide a direct assessment of the severity of the service conditions, thereby helping to prevent catastrophic damage.
[0003] Rare earth tantalate (RETaO4) is an important potential category of TBC materials, with characteristics such as chemical stability, low thermal conductivity, excellent oxidation resistance, and higher TEC, among which YTaO4 has great research value. YTaO4 has the advantage of good ferroelasticity, which is beneficial to improve the toughness of TBCs. The Young's modulus of the polycrystalline YTaO4 ceramic material exhibits strong anisotropy. YTaO4 ceramic has better thermal stability and thermal insulation than current TBC materials.
[0004] 8YSZ has a relatively high coefficient of thermal expansion, which is more close to the nickel-based superalloy substrate. This can significantly reduce the large interfacial stress generated by the difference in thermal expansion and contraction during heating and cooling, and fundamentally improve the bonding strength and thermal fatigue life of the coating. And 8YSZ realizes perfect fusion with the current two major preparation technologies, atmospheric plasma spraying (APS) and electron beam physical vapor deposition (EB-PVD).
[0005] YTaO4: Er 3+ / Yb 3+ @8YSZ: Er 3+ / Yb 3+ As a core-shell structure, it combines the advantages of two TBCs, YTaO4: Er 3+ / Yb 3+ 8YSZ: Er 3+ / Yb 3+As a shell, it can be tightly integrated with the substrate while protecting the internal core material, enabling it to emit light stably.
[0006] In this patent, a core-shell structured YTaO4:Er was prepared using the sol-gel method and the hydrothermal method. 3+ / Yb 3+ @8YSZ: Er 3+ / Yb 3+ Fluorescent temperature probe with thermal barrier coating. Results show that YTaO4:Er was successfully prepared. 3+ / Yb 3+ @8YSZ:Er 3+ / Yb 3+ The core-shell material emits green light at a wavelength of 556 nm when excited at 980 nm, and has high temperature sensitivity at 300 K, which can be better applied to thermal barrier coatings to monitor the service temperature of thermal barrier coatings in real time. Summary of the Invention
[0007] The purpose of this invention is to prepare a core-shell structured YTaO4:Er 3+ / Yb 3+ @8YSZ: Er 3+ / Yb 3+ Fluorescent temperature probe with thermal barrier coating. The prepared YTaO4:Er core-shell structure... 3+ / Yb 3+ @8YSZ: Er 3+ / Yb 3+ It possesses the advantages of both types of TBCs. The YTaO4:Er studied in this invention... 3+ / Yb 3+ @8YSZ: Er 3+ / Yb 3+ The preparation method of the core-shell structure can meet the performance requirements of thermal barrier coating materials to a certain extent and has good fluorescence properties.
[0008] To achieve the above objectives, the present invention employs the following technical solution:
[0009] YTaO4:Er was prepared by sol-gel method 3+ / Yb 3+ The nuclear material was prepared using TaCl5, Yb(NO3)3·5H2O, Y(NO3)3·6H2O and Er(NO3)3·6H2O as raw materials, anhydrous ethanol as the reaction base liquid, PEG 10000 as the dispersant and citric acid as the complexing agent.
[0010] (1) Using a spatula, weigh out a certain amount of Ta in a molar ratio of 1:1. 5+ and RE 3+Citric acid and PEG10000
[0011] (2) Place all the drugs into anhydrous ethanol, stir until completely dissolved and thoroughly mixed to obtain a transparent sol system.
[0012] (3) The gel was aged and dried to obtain a dry gel.
[0013] (4) Grind the dry gel into powder, calcine it in a tube furnace, and then grind it again to obtain YTaO4:Er 3+ / Yb 3+ Ceramic powder.
[0014] (5) Preparation of YTaO4 by hydrothermal method: Er 3+ / Yb 3+ @8YSZ: Er 3+ / Yb 3+ The core-shell material uses Y(NO3)3·6H2O and ZrOCl2·8H2O as raw materials, with urea providing an alkaline environment.
[0015] (6) YTaO4: Er 3+ / Yb 3+ The powder was mixed with H2O2 solution and added to a high-temperature reactor for hydrothermal reaction of YTaO4:Er 3+ / Yb 3+ Surface treatment of nuclear materials.
[0016] (7) The experiment was conducted according to a molar ratio of core material to shell material of 1:8. Weigh out the treated YTaO4: Er 3+ / Yb 3+ powder.
[0017] (8) Weigh out the corresponding masses of Y(NO3)3·6H2O and ZrOCl2·8H2O according to the molar ratio Y: Zr = 0.08: 0.92.
[0018] (9) According to the molar ratio RE 3+ Urea ratio: 1:2 Weigh out urea.
[0019] (10) Weigh the medicine and the surface-treated nuclear material and put them into deionized water and stir to mix.
[0020] (11) Place the well-mixed solution into a high-pressure reactor for hydrothermal reaction. Once the reaction is complete, a white precipitate is obtained.
[0021] (12) Remove the white precipitate, wash it 5 times, and then dry it.
[0022] (13) After thoroughly grinding the dried powder, calcine it in a muffle furnace and then grind it again to obtain YTaO4: Er3+ / Yb 3 + @8YSZ: Er 3+ / Yb 3+ Core-shell materials.
[0023] The purpose of this invention is to prepare a core-shell structured YTaO4:Er 3+ / Yb 3+ @8YSZ: Er 3+ / Yb 3+ Fluorescent temperature probe with thermal barrier coating. The prepared YTaO4:Er core-shell structure... 3+ / Yb 3+ @8YSZ: Er 3+ / Yb 3+ It possesses the advantages of both types of TBCs. The YTaO4:Er studied in this invention... 3+ / Yb 3+ @8YSZ: Er 3+ / Yb 3+ The preparation method of the core-shell structure can meet the performance requirements of thermal barrier coating materials to a certain extent and has good fluorescence properties.
[0024] The advantages of this invention compared to other TBC luminescent ceramic materials are mainly reflected in the following points:
[0025] (1) The present invention uses the sol-gel method and the hydrothermal method to prepare core-shell materials.
[0026] (2) The prepared YTaO4: Er 3+ / Yb 3+ @8YSZ: Er 3+ / Yb 3+ Core-shell structured materials hold promise as a stable thermal barrier coating fluorescent probe.
[0027] (3) The prepared YTaO4: Er 3+ / Yb 3+ @8YSZ: Er 3+ / Yb 3+ Core-shell structured materials have high temperature sensitivity and are a new choice for next-generation intelligent thermal barrier coating materials. Attached Figure Description
[0028] Figure 1 YTaO4: Er prepared in Example 1 3+ / Yb 3+ XRD pattern of nuclear material.
[0029] Figure 2 YTaO4: Er prepared in Example 1 3+ / Yb 3+ @8YSZ: Er 3+ / Yb 3+ TEM image of core-shell structured ceramic powder.
[0030] Figure 3 YTaO4: Er prepared in Example 1 3+ / Yb 3+ @8YSZ: Er 3+ / Yb 3+ Mapping diagram of core-shell structured ceramic powder.
[0031] Figure 4 YTaO4: Er prepared in Example 1 3+ / Yb 3+ @8YSZ: Er 3+ / Yb 3+ Upconversion emission spectrum of a core-shell fluorescent temperature probe excited at 980 nm.
[0032] Figure 5 YTaO4: Er prepared in Example 1 3+ / Yb 3+ @8YSZ: Er 3+ / Yb 3+ CIE chromaticity diagram of a core-shell fluorescent temperature probe under 980 nm excitation conditions.
[0033] Figure 6 YTaO4: Er prepared in Example 1 3+ / Yb 3+ @8YSZ: Er 3+ / Yb 3+ Temperature-dependent upconversion emission curves of a core-shell structured fluorescent temperature probe.
[0034] Figure 7 YTaO4: Er prepared in Example 1 3+ / Yb 3+ @8YSZ: Er 3+ / Yb 3+ Relative sensitivity curves of a core-shell structured fluorescent temperature probe. Detailed Implementation
[0035] The present invention will be further described in detail below with reference to specific embodiments, but these embodiments do not limit the scope of the present invention in any way.
[0036] Example 1
[0037] A core-shell structure YTaO4:Er 3+ / Yb 3+@8YSZ: Er 3+ / Yb 3+ A fluorescent temperature probe with a thermal barrier coating and its preparation method are detailed below:
[0038] YTaO4:Er was prepared by sol-gel method 3+ / Yb 3+ Nuclear materials were prepared using TaCl5, Yb(NO3)3·5H2O, Y(NO3)3·6H2O, and Er(NO3)3·6H2O as raw materials, anhydrous ethanol as the reaction substrate, PEG 10000 as the dispersant, and citric acid as the complexing agent. A certain amount of TaCl5 was weighed out using a spatula at a molar ratio of 1:1. 5+ and RE 3+ Next, weigh out citric acid and PEG 10000, add all the drugs to anhydrous ethanol, stir until completely dissolved and thoroughly mixed to obtain a transparent sol system. Aging and drying yield a dry gel. Grind the dry gel into powder, calcine it in a tube furnace, and then grind it again to obtain YTaO4:Er 3+ / Yb 3+ Ceramic powder.
[0039] Hydrothermal preparation of YTaO4: Er 3+ / Yb 3+ @8YSZ: Er 3+ / Yb 3+ Core-shell materials. YTaO4: Er 3+ / Yb 3+ The powder was mixed with H2O2 solution and added to a high-temperature reactor for hydrothermal reaction, to react with YTaO4:Er 3+ / Yb 3+ Surface treatment of the nuclear material was carried out. The experiment was conducted according to a molar ratio of nuclear material to shell material of 1:8. Y(NO3)3·6H2O and ZrOCl2·8H2O were taken using a spatula, and urea was used to provide an alkaline environment. The corresponding masses of Y(NO3)3·6H2O and ZrOCl2·8H2O were weighed according to the molar ratio Y:Zr = 0.08:0.92, and then processed according to RE... 3+ Urea was weighed at a molar ratio of 1:2. The weighed reagent was then mixed with the surface-treated nuclear material in deionized water. The mixture was placed in a high-pressure reactor for hydrothermal reaction. After the reaction was complete, a white precipitate was obtained. The white precipitate was removed and washed five times. The washed and dried powder was then thoroughly ground and calcined in a muffle furnace before grinding again to obtain YTaO4:Er. 3+ / Yb 3+ @8YSZ: Er 3+ / Yb 3+ Core-shell materials.
[0040] The prepared YTaO4: Er 3+ / Yb 3+ The nuclear material was subjected to XRD testing, by the attached Figure 1 As can be seen, the diffraction peaks of the obtained product are consistent with those of the standard PDF card, indicating that the experiment successfully prepared YTaO4:Er 3+ / Yb 3+ Ceramic material, specifically M'-YTaO4, Er 3+ / Yb 3+ The addition of [a substance] did not change the crystal structure type; it remained M' type.
[0041] By analyzing YTaO4: Er 3+ / Yb 3+ @8YSZ: Er 3+ / Yb 3+ TEM testing, from the attached Figure 2 As can be seen from this, the obtained material is a core-shell material.
[0042] From the appendix Figure 3 The mapping results show that there is a hollow portion in the elemental distribution of Zr, and the elemental distribution of Ta exactly matches the hollow portion, indicating that YTaO4:Er was successfully prepared. 3+ / Yb 3+ @8YSZ: Er 3+ / Yb 3+ Core-shell structured fluorescent temperature probe.
[0043] From the appendix Figure 4 It can be seen that at an excitation wavelength of 980 nm, YTaO4:Er 3+ / Yb 3+ @8YSZ: Er 3+ / Yb 3+ Core-shell fluorescent temperature probes are based on Er 3+ It is the luminescent center.
[0044] From the appendix Figure 5 It can be seen from the data that at an excitation wavelength of 980 nm, YTaO4: Er 3+ / Yb 3+ @8YSZ: Er 3+ / Yb 3+ The core-shell structured fluorescent temperature probe emits green light at 556 nm.
[0045] From the appendix Figure 6 The luminescence properties at different temperatures can be observed, YTaO4: Er 3+ / Yb 3+ @8YSZ: Er 3+ / Yb 3+The luminescence performance of the core-shell structured fluorescent temperature probe gradually decreases with increasing temperature, and the luminescence is strongest at 300 K.
[0046] From the appendix Figure 7 It can be seen from YTaO4: Er 3+ / Yb 3+ @8YSZ: Er 3+ / Yb 3+ The relative sensitivity of the core-shell structured fluorescent temperature probes is optimal at 300 K.
Claims
1. A core-shell structure YTa04:Er 3+ / Yb 3+ @8YSZ:Er 3+ / Yb 3+ A thermal barrier coating fluorescent temperature probe and a preparation method thereof, characterized in that a sol-gel method and a hydrothermal method are used for preparation, and the main steps are as follows: First, the sol-gel method was used to prepare YTaO4: Er 3+ / Yb 3+ core material, TaCl5, Yb(NO3)3.5H2O, Y(NO3)3.6H2O and Er(NO3)3.6H2O as raw materials, anhydrous ethanol as the reaction bottom liquid, PEG 10000 as the dispersant, and citric acid as the complexing agent. A medicine spoon was used to take a certain amount of Ta 5+ and RE 3+ , and citric acid and PEG 10000 were weighed. All medicines were put into anhydrous ethanol, stirred to completely dissolve, and mixed thoroughly to obtain a transparent sol system. Aging and drying obtained a dry gel. The dry gel was ground into powder, put into a tube furnace for calcination, and then ground to obtain YTaO4: Er 3+ / Yb 3+ ceramic powder. YTaO4: Er was prepared by hydrothermal method again 3+ / Yb 3+ @8YSZ: Er 3+ / Yb 3+ core-shell material. YTaO4: Er 3+ / Yb 3+ The powder was mixed with H2O2 solution and added to the high-temperature reaction kettle for hydrothermal reaction. YTaO4: Er 3+ / Yb 3+ core material was surface treated. The experiment was carried out according to the molar ratio of core material to shell material of 1:
8. Y(NO3)3·6H2O and ZrOCl2·8H2O were taken with a medicine spoon, and urea provided an alkaline environment. According to the molar ratio Y:Zr = 0.08:0.92, Y(NO3)3·6H2O and ZrOCl2·8H2O of corresponding mass were weighed, and RE 3+ : urea = 1:2 was weighed, and the weighed medicines and the surface treated core material were put into deionized water and stirred to mix, the mixed solution was put into a high-pressure reaction kettle for hydrothermal reaction, and white precipitate was obtained after the reaction was completed. The white precipitate was taken out and washed 5 times, and then the washed and dried powder was put into a muffle furnace for calcination and grinding after being fully ground, to obtain YTaO4: Er 3+ / Yb 3+ @8YSZ: Er 3+ / Yb 3+ core-shell material.
2. YTa04:Er as claimed in claim 1 3+ / Yb 3+ @8YSZ:Er 3+ / Yb 3+ thermal barrier coating material. Characterized in that, YTaO4: Er 3+ / Yb 3+ @8YSZ: Er 3+ / Yb 3+ core-shell material, and under the excitation of 980 nm, the emission spectrum emits green light at 556 nm wavelength, indicating that YTaO4: Er 3+ / Yb 3+ @8YSZ: Er 3+ / Yb 3+ has good fluorescence performance and high temperature measurement sensitivity, and is a new choice for new generation of intelligent thermal barrier coating materials.