Up-conversion and near infrared luminescence in Y2O3: Er3+, Yb3+ transparent ceramics

Er[Formula: see text]/Yb[Formula: see text] co-doped Y2O3 transparent ceramics were fabricated by vacuum sintering method. The Y2O3: Er[Formula: see text]:Yb[Formula: see text] nonopowders were prepared by co-precipitation method in advance. The morphology of powders and ceramics as investigated. The powders exhibited well dispersive condition with 100[Formula: see text]nm in diameter. The compactness of ceramics increased obviously with the increasing temperature. No pore was found in the ceramic sintered at [Formula: see text]C. The ceramic samples showed intense near infrared luminescence peaking at 1535[Formula: see text]nm under the excitation of 980[Formula: see text]nm lasers, assigned to the [Formula: see text] transition of Er[Formula: see text]. The intense up-conversion emissions were observed under the excitation of 980[Formula: see text]nm and 1550[Formula: see text]nm lasers.

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Fabrication of Dy2O3 Transparent Ceramics by Vacuum Sintering Using Precipitated Powders

Magnetochemistry ◽

10.3390/magnetochemistry7010006 ◽

2020 ◽

Vol 7 (1) ◽

pp. 6

Author(s):

Dianjun Hu ◽

Xin Liu ◽

Ziyu Liu ◽

Xiaoying Li ◽

Feng Tian ◽

...

Keyword(s):

Near Infrared ◽

Optical Quality ◽

Precipitation Method ◽

Infrared Range ◽

Transparent Ceramics ◽

Vacuum Sintering ◽

Hydrogen Carbonate ◽

Ammonium Hydrogen ◽

Liquid Precipitation ◽

Near Infrared Range

As a kind of promising material for a Faraday isolator used in the visible and near infrared range, Dy2O3 transparent ceramics were prepared by vacuum sintering from the nano-powders synthesized by the liquid precipitation method using ammonium hydrogen carbonate as precipitant with no sintering aids. The synthesized precursor was calcinated at 950 °C–1150 °C for 4 h in air. The influences of the calcination temperature on the morphologies and phase composition of Dy2O3 powders were characterized. It is found that the Dy2O3 powder calcinated at 1000 °C for 4 h is superior for the fabrication of Dy2O3 ceramics. The Dy2O3 transparent ceramic sample prepared by vacuum sintering at 1850 °C for 10 h, and subsequently with air annealing at 1400 °C for 10 h, from the 1000 °C-calcined Dy2O3 powders, presents the best optical quality. The values of in-line transmittance of the optimal ceramic specimen with the thickness of 1.0 mm are 75.3% at 2000 nm and 67.9% at 633 nm. The Verdet constant of Dy2O3 ceramics was measured to be −325.3 ± 1.9 rad/(T·m) at 633 nm, about 2.4 times larger than that of TGG (Tb3Ga5O12) single crystals.

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Near-Infrared-to-Green Upconversion in Yb3+/Er3+ Co-Doped BaYF5 by Chemical Co-Precipitation Method

Materials Science Forum ◽

10.4028/www.scientific.net/msf.663-665.328 ◽

2010 ◽

Vol 663-665 ◽

pp. 328-331 ◽

Cited By ~ 1

Author(s):

Hai Yan Du ◽

Wei Hang Zhang ◽

Jia Yue Sun

Keyword(s):

Optical Properties ◽

Laser Diode ◽

Near Infrared ◽

Precipitation Method ◽

Structural And Optical Properties ◽

Solution Processed ◽

Co Precipitation ◽

Barium Yttrium ◽

Co Doped

Barium yttrium fluorides ( BaYF5 ) co-doped with Er3+ and Yb3+ were synthesized by the chemical co-precipitation method and the structural and optical properties of solution-processed Er3+/Yb3+ co-doped BaYF5 were characterized. Intense visible emissions centered at around 523, 546 and 658 nm, originated from the transitions of 2H11/2 → 4I15/2, 4S3/2 → 4I15/2, and 4F9/2 → 4I15/2 of Er3+, respectively, have been observed in samples upon excitation with a 980nm laser diode, and the involved mechanisms have been explained.

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Energy transfer mechanisms of quantum cutting near infrared luminescence in Ho3+/Yb3+ co-doped Y2O3 transparent ceramics

Journal of Non-Crystalline Solids ◽

10.1016/j.jnoncrysol.2014.06.012 ◽

2014 ◽

Vol 403 ◽

pp. 84-87 ◽

Cited By ~ 7

Author(s):

Qiang Xu ◽

Hui Lin ◽

Hao Teng ◽

Chong Chen ◽

Shengming Zhou

Keyword(s):

Energy Transfer ◽

Near Infrared ◽

Transparent Ceramics ◽

Infrared Luminescence ◽

Quantum Cutting ◽

Transfer Mechanisms ◽

Co Doped

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Visible to near infrared energy transfer in Ce³+, Yb³+ co-doped YAG crystal prepared by co-precipitation method

Optical Materials Express ◽

10.1364/ome.449693 ◽

2022 ◽

Author(s):

Kun Yue ◽

zhou you ◽

Pan Ke ◽

Jianxiang Wen ◽

Ming Jia ◽

...

Keyword(s):

Energy Transfer ◽

Near Infrared ◽

Precipitation Method ◽

Co Precipitation ◽

Co Doped

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A homogeneous co-precipitation method to synthesize highly sinterability YAG powders for transparent ceramics

Ceramics International ◽

10.1016/j.ceramint.2014.10.076 ◽

2015 ◽

Vol 41 (2) ◽

pp. 3283-3287 ◽

Cited By ~ 25

Author(s):

Jinsheng Li ◽

Xudong Sun ◽

Shaohong Liu ◽

Xiaodong Li ◽

Ji-Guang Li ◽

...

Keyword(s):

Precipitation Method ◽

Transparent Ceramics ◽

Co Precipitation

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Nitrogen and Bromide Co-Doped Hydroxyapatite Thin Films with Antimicrobial Properties

Coatings ◽

10.3390/coatings11121505 ◽

2021 ◽

Vol 11 (12) ◽

pp. 1505

Author(s):

Simona Liliana Iconaru ◽

Carmen Steluta Ciobanu ◽

Daniela Predoi ◽

Mikael Motelica-Heino ◽

Constantin Cătălin Negrilă ◽

...

Keyword(s):

Thin Films ◽

Antimicrobial Activity ◽

Spin Coating ◽

Thin Layers ◽

Precipitation Method ◽

X Ray ◽

Co Precipitation ◽

First Time ◽

Co Doped

Hydroxyapatite (Ca10(PO4)6(OH)2, HAp), due to its high biocompatibility, is widely used as biomaterial. Doping with various ions of hydroxyapatite is performed to acquire properties as close as possible to the biological apatite present in bones and teeth. In this research the results of a study performed on thin films of hydroxyapatite co-doped with nitrogen and bromine (NBrHAp) are presented for the first time. The NBrHAp suspension was obtained by performing the adapted co-precipitation method using cetyltrimethylammonium bromide (CTAB). The thin layers of NBrHAp were obtained by spin-coating. The stability of the NBrHAp suspension was examined by ultrasound measurements. The thin layers obtained by the spin-coating method were examined by scanning electron microscopy (SEM), optical microscopy (OM), and metallographic microscopy (MM). The presence of nitrogen and bromine were highlighted by energy-dispersive X-ray spectroscopy (EDS) and X-ray photoelectron spectroscopy (XPS) studies. Fourier transform infrared spectroscopy (FTIR) was used to highlight the chemical status of nitrogen and bromine. In addition, the powder obtained from the NBrHAp suspension was analyzed by XRD. Moreover, the in vitro antimicrobial activity of the NBrHAp suspensions and coatings was investigated using the reference microbial strains Staphylococcus aureus ATCC 25923, Escherichia coli ATCC 25922, and Candida albicans ATCC 10231. The results highlighted the successful obtainment of N and Br co-doped hydroxyapatite suspension for the first time by an adapted co-precipitation method. The obtained suspension was used to produce pure NBrHAp composite thin films with superior morphological properties. The NBrHAp suspensions and coatings exhibited in vitro antimicrobial activity against bacterial and fungal strains and revealed their good antimicrobial activity.

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