Development and study of ZnO:In optical scintillation ceramic

Gorokhova, E. I.; Eron’ko, S. B.; Kulkov, A. M.; Oreshchenko, E. A.; Simonova, K. L.; Chernenko, Kirill; Venevtsev, Ivan; Родный, П. А.; Lott, K.; Wieczorek, H.

doi:10.1364/jot.82.000837

Cited by 9 publications

(8 citation statements)

References 9 publications

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“…Therefore, the indium doping of ZnO ceramics leads to the decrease of PL α parameter in 15 times. Here it can be noted that calculated from [14] for 0.13 wt% In doped ZnO ceramics X-ray luminescence parameter α was even decreased by 85 times compared with undoped. In the undoped ZnO ceramics disseminated vacancies remain inside grains due to slow volume diffusion processes at 1150 ºC and large distance to probable sinks in the coarse grain microstructure.…”

Section: Microstructure Of Ceramicsmentioning

confidence: 69%

“…The indium in the form of indium oxide (UHP, Russia) was introduced by mechanical mixing with the original ZnO powder during 40 min at 293K. Ceramics of undoped and 0.13 wt% In doped ZnO were fabricated by uniaxial hot pressing sintering in vacuum at temperature 1150 °C and P = 100-200 MPa for 60 min [14]. Microstructures were investigated by scanning electron microscopy (SEM, LYRA, Tescan, Oxford, HV:15-40 kV) with energy dispersive X-ray spectroscopy (EDS, Eagle III XPL), transmission electron microscopy (TEM, FEI, Tecnai, GF20) and optical microscopy (Eclipse L150, Nicon).…”

Section: Experimental Partmentioning

confidence: 99%

“…On the other hand, it is known that introduction of donor impurities such as gallium or indium into the composition can alter the properties of ZnO nanocrystals and films [3], [13]. In [14] for the first time ZnO:In transparent ceramic has been obtained by hot pressing sintering in vacuum. It has been shown that the indium doping leads to the increase of the intensity of Xray luminescence excitonic band and ensures photonic response with a subnanosecond decay time.…”

Section: Introductionmentioning

confidence: 99%

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Effect of in Doping on the ZnO Powders Morphology and Microstructure Evolution of ZnO:In Ceramics as a Material for Scintillators

Muktepavela

Maniks

Grigorjeva

et al. 2018

Latvian Journal of Physics and Technical Sciences

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Transparent ZnO ceramics are of interest for use as material for high-efficiency fast scintillators. Doping ZnO ceramics in order to improve complex of their properties is a promising direction. In the present research, the role of indium in the ZnO nanopowders surface interactions and in the change of microstructures and photoluminescence (PL) characteristics of sintered cera-mics is considered. Undoped and 0.13 wt% In doped ZnO ceramics are obtained by hot pressing sintering. It has been found that indium leads to the transition of initially faceted ZnO particles to rounded, contributing to good sintering with formation of diffusion active grain boundaries (GBs). Unlike ZnO ceramics, ZnO:In ceramics microstructure is characterised by the trans-crystalline mode of fracture, faceted GBs with places of zig-zag forms and predominant distribution of In at the GBs. Such indium induced modifications of GBs promote removal of point defects and reduce PL parameter α = Idef/Iexc in comparison with the undoped ceramics. Results characterise ZnO:In cera-mics with improved GBs properties as a prospective material for scintillators.

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Section: Microstructure Of Ceramicsmentioning

confidence: 69%

Section: Experimental Partmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of in Doping on the ZnO Powders Morphology and Microstructure Evolution of ZnO:In Ceramics as a Material for Scintillators

Muktepavela

Maniks

Grigorjeva

et al. 2018

Latvian Journal of Physics and Technical Sciences

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“…The presence of the gallium dopant changes the character of the microstructure of the ZnO ceramic, although not so radically as is observed when it is doped with indium [15]. Subdivision and change of the morphology of the grains occurs.…”

Section: Resultsmentioning

confidence: 96%

Structural, optical, and luminescence properties of ZnO:Ga optical scintillation ceramic

Gorokhova¹,

Eron’ko²,

Oreshchenko³

et al. 2018

J. Opt. Technol.

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This paper discusses the characteristics of ZnO and ZnO:Ga ceramics fabricated by uniaxial hot pressing. The short-wavelength transmission limit of zinc oxide ceramics is in the 370-nm region; the long-wavelength limit is determined by the free-charge-carrier concentration and lies in the interval from 5 to 9 μm. The total transmittance of such ceramics in the visible and near-IR regions is about 70% when the sample is 0.5 mm thick. The luminescence spectrum is represented by a broad emission band with maximum at 580 nm, having a defect nature. The introduction of 0.03-0.1 mass % gallium into the zinc oxide structure inhibits grain growth and increases the free-charge-carrier concentration to 3.44 × 10 19 cm −3. As the gallium concentration increases in the range 0.05-0.1 mass % in a ceramic of composition ZnO:Ga, the defect luminescence band is suppressed and a characteristic exciton luminescence is formed with a maximum corresponding to 389 nm and a damping time constant of 1.1 ns.

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“…, 也严重阻碍了非立方体系透明陶瓷的发展。目前研究主要集中在晶粒尺寸与织构度对非立方体系透明陶瓷透过率的影响 [2][3][4][5][6] 。对于 Al 2 O 3 透明陶瓷, 人们已经开展较多关于晶粒尺寸影响透过率的研究 [3][4][5][6] 。Apetz 等 [3] 在无烧结助剂添加的情况下, 制得在 600 nm 处透过率在 70%以上的氧化铝透明陶瓷(厚度为 0.8 mm), 其晶粒尺寸仅为 0.3 μm。 Krell 等 [4] 也报道了相似的实验结果, 同时他们采用瓷的探索研究提供了实验基础。 ZnO 是迄今为止发现衰减时间最短的闪烁材料 [7] (~400 ps), 在快衰减闪烁探测领域具有良好的应用前景, 使得透明 ZnO 陶瓷的研究逐渐引起人们的重视 [8][9] [14] , 可表示为:…”

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Optical Transmittance Model Construction for ZnO Transparent Ceramic and Experimental Verification

Lin¹,

Fan²,

Ding³

et al. 2019

Journal of Inorganic Materials

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The influence of birefringent light scattering on in-line optical transmittance model depended on uniaxial hexagonal crystal structure transparent ceramics using ZnO as research object has been established based on Mie theory and its developed approximation Rayleigh-Gans-Debye scatting theory. Theoretical calculation indicates that in-line optical transmittance of ZnO transparent ceramics improves obviously with the decrease of grain size and increase of orientation. ZnO transparent ceramics which meet the microstructure requirements of the model were effectively controlled by slip casting process under a strong magnetic field and designing SPS sintering parameters. Corresponding results show that the in-line optical transmittance of non-textured ZnO transparent ceramic increased from 5.1% to 12.9% at 600 nm as grain size decreased from 1.72 μm to 0.35 μm while that of textured ZnO transparent ceramic (mean grain size 0.66 μm) was improved greatly from 21.6% to 36.6% at 600 nm due to increasing orientation factor to 24.7% calculated from XRD data. Based on these data, it is found that the calculation results of theoretical model match well with the experiment results.

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Development and study of ZnO:In optical scintillation ceramic

Cited by 9 publications

References 9 publications

Effect of in Doping on the ZnO Powders Morphology and Microstructure Evolution of ZnO:In Ceramics as a Material for Scintillators

Effect of in Doping on the ZnO Powders Morphology and Microstructure Evolution of ZnO:In Ceramics as a Material for Scintillators

Structural, optical, and luminescence properties of ZnO:Ga optical scintillation ceramic

Optical Transmittance Model Construction for ZnO Transparent Ceramic and Experimental Verification

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