Puxian Xiong,Chibin Zheng,Mingying Peng,Zhihao Zhou,Feifei Xu,Kexin Qin,Yiyu Hong,Zhijun Ma
Till now, many doped persistent luminescence (PersL) phosphors have been investigated and found various applications in such as bioimaging, photocatalysis and information storage, but introducing PersL emitters into a proper host is mostly complex. In this research, a self-activated PersL phosphor Ba 2 Zr 2 Si 3 O 12 (BZSO) is prepared by solid state reaction. By adding NH 4 Cl, the self-activated PersL intensity is evidently enhanced. The trap depths and concentrations are examined by thermoluminescence spectra. Meanwhile, Bi 3+ ions are introduced into BZSO and show wide band photoluminescence (PL) from 300 to 600 nm. Moreover, the PL of Bi 3+ is tunable under excitation by 265-350 nm lights. Furthermore, as a proof-of-concept design, we designed a patterned quick response (QR) code based on the self-activated PersL of BZSO, and the information of “South China University of Technology (SCUT)” can be read out by the code scanning technology. Bi 3+ -doped BZSO phosphors are suggested to provide potential applications in information storage by its self-activated PersL, and to excite researchers to study the tunable PL in Bi 3+ -doped phosphor.
This study presents the dielectric properties of Ba 2 Zr 2 Si 3 O 12 ceramics, synthesized using the solid state method. The cubic crystal structure of Ba 2 Zr 2 Si 3 O 12 ceramics was conclusively verified through the analysis of XRD patterns and subsequent structural refinement. Refined lattice parameters of a = b = c = 10.23178 Å were found, with a corresponding unit cell volume of V = 1071.159026 Å 3 . The grain microstructure of the ceramics was characterized using SEM, which showed density of 97.6% for the Ba 2 Zr 2 Si 3 O 12 ceramic. The Si-O bond valences ( V Si-O ) were found to be closely related to the τ f of the Ba 2 Zr 2 Si 3 O 12 ceramics. The microwave dielectric properties of the Ba 2 Zr 2 Si 3 O 12 ceramics sintered at 1490°C were ascertained to be ε r = 15.08, Q × f = 14885 GHz ( f = 9.9 GHz), and τ f = −78.6 ppm/°C.
危险品化学品经营许可证（带存储）