CERAMICS INTERNATIONAL
·
2024
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IF 5.1
Qingqing Yu,Fumin Lu,Ligan Ma,Peican Dai,Fangfang Hu,Hai Guo,Rongfei Wei
Multifunctional materials with optical temperature sensing and anti-counterfeiting properties have vast application prospects in our daily life, but the development of them still faces huge challenges. Herein, a novel SrY 2 O 4 :Bi 3+ ,Er 3+ phosphor with multicolor luminescence was synthesized triumphantly. Stimulated by different ultraviolet (UV) lights, the sample exhibits blue or green emissions, while emits yellow up-conversion luminescence under 980 nm laser irradiation. Interestingly, abnormal thermal quenching and thermal stimulation enhanced persistent luminescence are realized in SrY 2 O 4 :Bi 3+ ,Er 3+ . Benefiting from the distinct responses of Bi 3+ and Er 3+ luminescence to temperature, thermochromism is verified when excited by UV or 980 nm light. Furthermore, the color shift from yellow-green to dark yellow is seen as the 980 nm laser power density reduces or the distance between laser source and the sample increases. Based on the luxuriant luminescence properties, multimode optical temperature sensing and dynamic anti-counterfeiting are constructed. All findings indicate that the multicolor emissive SrY 2 O 4 :Bi 3+ ,Er 3+ material offers a fresh outline for the exploitation of multiple optical thermometry and anti-counterfeiting.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Weilun Qian,Yan Ma,Zhoufu Wang,Hao Liu,Zhongfeng Xia,Zhenghuang Quan,Xitang Wang,Shenghao Zeng,Weidong Fu,Luwei Fu
The near-infrared (NIR) reflective thermal insulation coating can effectively reflect heat and protect the base materials. With excellent high-temperature stability and low thermal conductivity, SrY 2 O 4 attracted much attention due to its unique thermophysical characteristics. However, the NIR reflectance of SrY 2 O 4 is scarcely reported. In this work, a novel low-temperature solid-state reaction synthesis of SrY 2 O 4 is explored, which aims to solve the problems of high temperature (1400–1650 °C) and repeated calcination during the synthesis process via conventional solid-state reaction method, and the NIR reflectance of SrY 2 O 4 is evaluated. SrY 2 O 4 powders with few Y 2 O 3 impurities are obtained at 1100–1300 °C via low-temperature solid-state reaction method. And Y 2 O 3 impurities are successfully eliminated, resulting in a simple synthesis of single-phase SrY 2 O 4 powder at 1200 °C by adjusting the ratio of raw materials to n (Sr 2+ ):n (Y 3+ ) = 1.10:2. The thermal decomposition process and composition of the precursor were analyzed by Fourier transform infrared spectrum (FTIR) and thermogravimetric/differential scanning calorimetry (TG-DSC), respectively. The cell parameters, micromorphology, NIR reflectance and thermal conductivity of SrY 2 O 4 powders synthesized via low-temperature and conventional solid-state reaction method are comparative studied. The result shows that single-phase SrY 2 O 4 powder obtained via low-temperature solid-state reaction method has smaller cell parameters, minor particle size and higher NIR reflectance. The NIR reflectance maintains above 90 % and thermal conductivity at 25 °C is 7.37 W m −1 K −1 .
研究领域:
材料科学
·
热物理学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
·
2023
·
IF 5.7
Xuewei Luo,Hantao Li,Shuo Huang,Kaiyun Li,Jianping Li,Xiuen Yang,Chunhui Xu,Shuen Hou,Hongyun Jin
Anti-spinel oxide SrY 2 O 4 has attracted extensive attention as a promising host lattice due to its outstanding high-temperature structural stability and large thermal expansion coefficient (TEC). However, the overhigh thermal conductivity limits its application in the field of thermal barrier coatings . To address this issue, a novel high-entropy Sr(Y 0.2 Sm 0.2 Gd 0.2 Dy 0.2 Yb 0.2 ) 2 O 4 ceramic was designed and synthesized for the first time via the solid-state method. It is found that the thermal conductivity of Sr(Y 0.2 Sm 0.2 Gd 0.2 Dy 0.2 Yb 0.2 ) 2 O 4 is reduced to 1.61 W·m −1 ·K −1 , 53 % lower than that of SrY 2 O 4 (3.44 W·m −1 ·K −1 ) at 1500 °C. Furthermore, reasonable TEC (11.53 ×10 −6 K −1 , 25 °C ∼ 1500 °C), excellent phase stability, and improved fracture toughness (1.92 ± 0.04 MPa·m 1/2 ) remained for the high-entropy Sr(Y 0.2 Sm 0.2 Gd 0.2 Dy 0.2 Yb 0.2 ) 2 O 4 ceramic, making it a promising material for next-generation thermal barrier coatings.
研究领域:
材料科学
·
热能工程
✓ 已验证
产品关联
DOI
高影响因子
POWDER TECHNOLOGY
·
2023
·
IF 5.2
Kaiyun Li,Hantao Li,Shuo Huang,Xuewei Luo,Hongyun Jin
Due to the thermal and chemical stability, SrY 2 O 4 has a potential to be utilized as thermal barrier coatings materials. Unfortunately, the relative high synthesis temperature (> 1425 °C) of SrY 2 O 4 leads to high energy consumption limits its industrial production. To address this issue, a novel and easy fabricating approach for single-phased SrY 2 O 4 was explored at ultra-low temperature of 950 °C, in which isopropanol was used to disperse the powder slurry by ball milling . The XRD and high-resolution TEM results demonstrated that the obtained SrY 2 O 4 possesses an anti-spinel orthorhombic crystal structure . In addition, SrY 2 O 4 has good phase stability and high thermal expansion coefficient (11.06 × 10 −6 K −1 , RT ∼ 1200 °C) at high temperature, which implies that it is a good choice for thermal barrier coatings.
研究领域:
材料科学
·
热力学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yee-Shin Chang,Tai-Chen Kuo
ASr(YDy) 2 O 4 phosphors co-doped with La 3+ and Zn 2+ ions, prepared using a solid-state reaction method. The incorporation of La 3+ and Zn 2+ ions influences the crystal structure, surface morphology, and luminescent characteristics. X-ray diffraction analysis confirms a phase transition from SrY 2 O 4 to SrLa 2 O 4 with La 3+ substitution, while scanning electron microscopy reveals particle growth and morphological changes. The introduction of Zn 2+ enhances crystallinity and increases luminescence intensity at characteristic Dy 3+ emission peaks. Thermal quenching analysis demonstrates stable luminescence at elevated temperatures, indicating excellent thermal stability. The combined effects of La 3+ and Zn 2+ co-doping improve optical properties and material durability, making these phosphors promising for advanced photonic and lighting applications requiring high luminescent efficiency and thermal stability.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）