PLZT:Nd3+ Ceramics for Photonic Applications

In the present work the influence of neodymium concentration (0-1at-%) and sintering conditions on 8/65/35 PLZT:Nd3+ ceramics were studied. All ceramic powders were synthesized by MOM technique from high purity raw materials (>99,9%), and subsequently sintered by free sintering and hot uniaxial pressing method. To analyze the powders and ceramics more the XRD, EDS SEM, and ferroelectric measurements were performed. Optical spectra were examined for all prepared samples, and their optical properties were analyzed using reflectance, excitation and luminescence measurements. The study gives a detailed account of the relationships between doping and preparing conditions on the basic physical and dielectric and optical properties of obtained ceramic materials.

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Synthesis and structure of BiFeO3:RE (RE=Gd3+, Dy3+, Nd3+) ceramics

MATEC Web of Conferences ◽

10.1051/matecconf/201824201003 ◽

2018 ◽

Vol 242 ◽

pp. 01003

Author(s):

J. Dzik ◽

M. Płońska ◽

T. Pikula ◽

M. Rerak

Keyword(s):

Rare Earth ◽

Rare Earth Elements ◽

High Purity ◽

Raw Materials ◽

Ceramic Powders ◽

Pressing Method ◽

Ceramic Method ◽

Cold Pressing ◽

All Ceramic

In the present work the influence of rare earth elements concentration (0-10at-%) on BiFeO3:RE (RE=Gd3+, Dy3+, Nd3+) ceramics were studied. All ceramic powders were synthesized by conventional ceramic method using high purity raw materials (>99,9%), and subsequently sintered by free sintering and cold pressing method. To analyze the powders and ceramics more the XRD, EDS, SEM, and DTA were performed.

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The Influence of Fabrication Conditions on the Physical Properties of PLZT:Nd3+ Ceramics

Archives of Metallurgy and Materials ◽

10.2478/amm-2013-0176 ◽

2013 ◽

Vol 58 (4) ◽

pp. 1365-1369 ◽

Cited By ~ 3

Author(s):

M. Płonska ◽

W.A. Pisarski ◽

B. Wodecka-Dus ◽

D. Czekaj

Keyword(s):

Physical Properties ◽

Raw Materials ◽

Ceramic Materials ◽

Optimal Conditions ◽

Ceramic Powders ◽

Co Doping ◽

Bulk Ceramic ◽

Ceramic Samples ◽

All Ceramic ◽

Dielectric And Optical Properties

Abstract The aim of this work was to study the effect of fabrication conditions and neodymium co-doping on the physical properties of (Pb0:98La0:02)(Zr0:65Ti0:35)0:98O3, known as PLZT:Nd3+ ceramics. All ceramic powders of these materials were synthesized by the conventional mixed oxide method, from the high purity raw materials (>99.9%). The bulk ceramic samples were sintered by the pressure less sintering and the hot-uniaxial pressing techniques. The study gives a detailed account of the relationships between doping and preparing conditions on the dielectric and optical properties of obtained ceramic materials. Optimal conditions of PLZT:Nd3+ preparation as well as Nd3+ activator concentration were determined in relation to the potential opto-electronic applications.

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Sintering Behavior, Thermal Expansion, and Environmental Impacts Accompanying Materials of the Al2O3/ZrO2 System Fabricated via Slip Casting

Materials ◽

10.3390/ma14123365 ◽

2021 ◽

Vol 14 (12) ◽

pp. 3365

Author(s):

Justyna Zygmuntowicz ◽

Magdalena Gizowska ◽

Justyna Tomaszewska ◽

Paulina Piotrkiewicz ◽

Radosław Żurowski ◽

...

Keyword(s):

Thermal Expansion ◽

Life Cycle ◽

Coefficient Of Thermal Expansion ◽

Raw Materials ◽

Slip Casting ◽

Ceramic Materials ◽

Sintering Behavior ◽

Environmental Loads ◽

Practical Applications ◽

Technical Ceramics

This work focuses on research on obtaining and characterizing Al2O3/ZrO2 materials formed via slip casting method. The main emphasis in the research was placed on environmental aspects and those related to the practical use of ceramic materials. The goal was to analyze the environmental loads associated with the manufacturing of Al2O3/ZrO2 composites, as well as to determine the coefficient of thermal expansion of the obtained materials, classified as technical ceramics. This parameter is crucial in terms of their practical applications in high-temperature working conditions, e.g., as parts of industrial machines. The study reports on the four series of Al2O3/ZrO2 materials differing in the volume content of ZrO2. The sintering process was preceded by thermogravimetric measurements. The fabricated and sintered materials were characterized by dilatometric study, scanning electron microscopy, X-ray diffraction, and stereological analysis. Further, life cycle assessment was supplied. Based on dilatometric tests, it was observed that Al2O3/ZrO2 composites show a higher coefficient of thermal expansion than that resulting from the content of individual phases. The results of the life cycle analysis showed that the environmental loads (carbon footprint) resulting from the acquisition and processing of raw materials necessary for the production of sinters from Al2O3 and ZrO2 are comparable to those associated with the production of plastic products such as polypropylene or polyvinyl chloride.

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Dielectric and optical properties of alumina and silica nanoparticles dispersed poly(methyl methacrylate) matrix-based nanocomposites for advanced polymer technologies

Journal of Polymer Research ◽

10.1007/s10965-020-02406-9 ◽

2021 ◽

Vol 28 (2) ◽

Cited By ~ 1

Author(s):

Priyanka Dhatarwal ◽

Shobhna Choudhary ◽

R. J. Sengwa

Keyword(s):

Optical Properties ◽

Methyl Methacrylate ◽

Silica Nanoparticles ◽

Poly Methyl Methacrylate ◽

Dielectric And Optical Properties

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Preparation of High-Purity Ultrafine α-Al2O3 by Solid-State Reaction at Room Temperature

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.368-372.683 ◽

2008 ◽

Vol 368-372 ◽

pp. 683-685

Author(s):

Cheng Wei Hao ◽

Bo Lin Wu ◽

Ji Yan Li

Keyword(s):

Solid State ◽

High Purity ◽

Solid State Reaction ◽

Room Temperature ◽

Raw Materials ◽

Phase Particle ◽

Phase Transformation Temperature ◽

Particle Size And Morphology ◽

Size And Morphology ◽

Α Al2o3

Ammonium aluminium carbonate hydroxide (AACH), with a small quantity of γ-AlOOH, was synthesized through solid-state reaction at room temperature using AlCl3·6H2O and NH4HCO3 as raw materials and polyethylene glycol (PEG-10000) as the dispersant. After calcined at 1100°C for 1.5h, α-Al2O3 powders with primary particle sizes of 20~30nm were obtained. The crystal phase, particle size and morphology of the high-purity ultrafine α-Al2O3 were characterized. The results showed that a small quantity of γ-AlOOH in the AACH decomposed and formed crystal seeds. The presence of crystal seeds reduced the nucleation activation energy and therefore reduced the phase transformation temperature.

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Sol-Gel Synthesis and Characterization of Ultrafine ZrSiO4 Powder

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.906.66 ◽

2014 ◽

Vol 906 ◽

pp. 66-71

Author(s):

Zhen Quan Li ◽

Qiang Zhen ◽

Ya Li Wang

Keyword(s):

Wavelength Range ◽

High Purity ◽

Raw Materials ◽

Formation Rate ◽

Sol Gel ◽

Molar Ratio ◽

Sem And Tem ◽

Homogeneous Product ◽

Sol Gel Synthesis ◽

Calcined Temperature

High purity ZrSiO4 powder were synthesized using Si (C2H5O)4 and ZrOCl2·8H2O as raw materials by the sol-gel method, LiCl was added as mineralizer to promote crystallization of zircon. The influences of molar ratio of Zr:Si, calcined time and calcined temperature on the synthesis of ZrSiO4 powder were investigated. XRD, SEM and TEM were used to characterize the powders. It was found that when the molar ratio of Zr:Si was 1:1.2, the calcined temperature was 1600°C and the calcined time was 4h, the high purity ZrSiO4 ultrafine powder was obtained. The ZrSiO4 formation began at 1300°C and when the gel was calcined at 1600°Cfor 4 h, the formation rate of ZrSiO4 was up to 95%. SEM and TEM studies reveal a homogeneous product with particle sizes on the order of 0.1-1μm. The IR emissivity of ultrafine ZrSiO4 is 0.892 at the whole wavelength range, and that is up to 0.951 at the wavelength range of 8-14 μm.

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