Transparency and Photoluminescence of Gas-Pressure Sintered Lu-α-SiAlON:Ce<sup>3+</sup> Ceramics
Transparency and Photoluminescence of Gas-Pressure Sintered Lu-α-SiAlON:Ce<sup>3+</sup> Ceramics
复制标题
气压烧结Lu-α-SiAlON:Ce<sup>3+</sup>陶瓷的透明度和光致发光
DOI：
10.1149/2162-8777/ac774c
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发表时间：
2022
影响因子：
2.2
通讯作者：
Takahashi Takuma
中科院分区：
文献类型：
--
作者：
Aminaka Kohei;Tatami Junichi;Iijima Motoyuki;Takahashi Takuma
由于在诸如制造业、医学和通信的若干领域中对高功率光学器件的需求不断增长，对能够发射多种颜色的大的透明无机材料的需求正在增加。α-SiAlON是一种具有优异的热性能和机械性能的蓝色荧光粉，由于Ce 3+的掺杂，使其具有良好的发光性能。然而，迄今为止，只有少数几种透明的、光致发光的α-SiAlON：Ce 3+陶瓷被开发出来.在本研究中，我们利用稳定α-SiAlON的稀土离子中离子半径最小的Lu 3+，采用气压烧结技术制备了透明的α-SiAlON：Ce 3+陶瓷。Lu-α-SiAlON：Ce 3+陶瓷的晶粒尺寸比Y-α-SiAlON：Ce 3+陶瓷的晶粒尺寸小，因而具有更高的透明性。由于晶格收缩，Lu-α-SiAlON：Ce 3+陶瓷的最大发射波长相对于Y-α-SiAlON：Ce 3+陶瓷发生了蓝移。较低的Ce浓度导致较高的透明度和最大发射波长的蓝移。此外，以稀土氧化物微粉为原料，气压烧结的Lu-α-SiAlON：Ce 3+陶瓷在600 nm处的在线透过率为50%，高于相同气压烧结工艺和热等静压工艺制备的Y-α-SiAlON：Ce 3+陶瓷。
Owing to the growing demand for high power optical devices in several fields such as manufacturing, medicine, and communications, the demand for large and transparent inorganic materials capable of emitting multiple colors is increasing. α-SiAlON, which has excellent thermal and mechanical properties, is a phosphor that emits blue light because of the doping of Ce 3+. However, only a few transparent and photoluminescent α-SiAlON: Ce 3+ ceramics have been developed. In this study, we fabricated transparent α-SiAlON: Ce 3+ ceramics using a gas-pressure sintering technique utilizing Lu 3+, which has the smallest ionic radius among the rare-earth ions used to stabilize α-SiAlON. The Lu-α-SiAlON: Ce 3+ ceramics exhibited higher transparency than Y-α-SiAlON: Ce 3+ because of their finer grain size. The maximum emission wavelength of the Lu-α-SiAlON: Ce 3+ ceramics was blue shifted relative to that of the Y-α-SiAlON: Ce 3+ ceramics owing to lattice shrinkage. A lower Ce concentration resulted in higher transparency and a blue shift in the maximum emission wavelength. Furthermore, the in-line transmittance of the gas-pressure sintered Lu-α-SiAlON: Ce 3+ ceramics using fine raw powders of rare-earth oxides was 50% at 600 nm, which was higher than that of Y-α-SiAlON: Ce 3+ ceramics prepared via the same gas-pressure sintering technique followed by hot isostatic pressing.