Influence of rare-earth doping on the phase composition, sinterability, chemical stability and conductivity of BaHf0.8Ln0.2O3-δ (Ln = Yb, Y, Dy, Gd) proton conductors

The luminescent material, composed of rare-earth-doped alkaline earth aluminate, has been paid wide attention because of its chemical stability, usability and non-radioactive. In this study, the luminous material SrAl2O4:Eu2+,Dy3+ was prepared by a microwave method. The effect of microwave parameters on the performance of the luminous powder was investigated. The excitation and emission spectrum of the luminous material were measured by fluorospectrophotometer. The phase composition of the powder was analyzed by XRD. The results show that the luminous powder can be synthesized only when the microwave power is higher than the med-high fire (640W). The sample has the best luminous property when the molar ratio of Sr (NO3)2:Al (NO3)3·9H2O:H3BO3:Eu (NO3)3·6H2O:Dy (NO3)3·6H2O is about 1:2:0.5:0.04:0.08, and it is processed by high power for 20min in microwave oven.

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Phase composition of modern microcrystalline modifiers containing silicon, alkaline earth and rare earth metals

Electrical Metallurgy ◽

10.31044/1684-5781-2020-0-5-25-34 ◽

2020 ◽

pp. 25-34

Author(s):

V. P. Ermakova ◽

◽

S. Yu. Melchakov ◽

V. G. Smirnova ◽

L. A. Ovchinnikova ◽

...

Keyword(s):

Rare Earth ◽

Phase Composition ◽

Alkaline Earth ◽

Rare Earth Metals

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Microstructure and Electrical Properties of ZnO-Pr6O11-Dy2O3-Based Varistor Ceramics Doped with La2O3

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.336-338.680 ◽

2007 ◽

Vol 336-338 ◽

pp. 680-683

Author(s):

Jing Nan Cai ◽

Yuan Hua Lin ◽

Rong Juan Zhao ◽

Ce Wen Nan ◽

Jin Liang He

Keyword(s):

Rare Earth ◽

Phase Composition ◽

Electrical Properties ◽

Rare Earth Elements ◽

Leakage Current ◽

Breakdown Voltage ◽

Intergranular Phase ◽

Ceramic Method ◽

Sem Micrographs ◽

Ceramic Samples

ZnO-Pr6O11-Dy2O3-based varistor ceramics doped with 0~1.5 mol% La2O3 were fabricated by a conventional ceramic method. All the samples were sintered at 1350 oCfor 2 h. The phase composition and microstructure of the ceramic samples have been investigated by XRD, SEM and EDS. The results of SEM micrographs indicated that the La2O3 additives can promote ZnO grain’s growth, and the rare earth elements dispersed mainly in the intergranular phase observed by EDS. The electrical properties of the samples determined by the V-I curves revealed that the breakdown voltage of samples decreases from 508 V/mm to about 100 V/mm with the increase of La2O3, and the nonlinear exponent also decreases from 20.2 to 13.2. The typical leakage current is about 10.2 μA for the sample doped with 0.5 mol% La2O3.

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Erbium Tris(Amide) Compounds as Source Molecules FOR Rare Earth Doping of Semiconducting Materials

MRS Proceedings ◽

10.1557/proc-415-111 ◽

1995 ◽

Vol 415 ◽

Cited By ~ 1

Author(s):

Oliver Just ◽

Anton C. Greenwald ◽

William S. Rees

Keyword(s):

Rare Earth ◽

Solid State ◽

Earth Element ◽

Optoelectronic Devices ◽

Analytical Techniques ◽

Optically Active ◽

Rare Earth Doping ◽

Semiconducting Materials ◽

Host Materials ◽

Erbium Doped

ABSTRACTThe homoleptic compound erbium{tris[bis (trimethylsilyl)]amide} displays high doping ability for incorporation of the rare earth element into epitaxially grown semiconducting host materials for fabrication of temperature-independent, monochromatic solid state optoelectronic devices. Electronic characteristics derived from erbium doped semiconducting films have been obtained. Several more volatile and lower melting representatives of this class of compounds have been synthesized, characterized by various analytical techniques and examined for their suitability to incorporate optically-active erbium centers into a semiconducting environment.

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