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

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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PLZT:Nd3+ Ceramics for Photonic Applications

Advances in Science and Technology ◽

10.4028/www.scientific.net/ast.82.32 ◽

2012 ◽

Vol 82 ◽

pp. 32-37 ◽

Cited By ~ 3

Author(s):

Malgorzata Plonska ◽

Wojciech A. Pisarski ◽

Beata Wodecka-Dus ◽

Lukasz Cienki

Keyword(s):

Optical Properties ◽

High Purity ◽

Raw Materials ◽

Ceramic Materials ◽

Ceramic Powders ◽

Pressing Method ◽

All Ceramic ◽

Neodymium Concentration ◽

Sintering Conditions ◽

Dielectric And Optical Properties

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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Corrosion Experiments on Ceramic Samples Within Molten Salts

Journal of Nuclear Engineering and Radiation Science ◽

10.1115/1.4043097 ◽

2019 ◽

Vol 5 (3) ◽

Cited By ~ 1

Author(s):

Jan Hadrava ◽

Vojtěch Galek ◽

Jaroslav Stoklasa ◽

Jan Hrbek ◽

Kateřina Kunešová ◽

...

Keyword(s):

Heat Transfer ◽

Fuel Cells ◽

Physical Properties ◽

Molten Salt ◽

Molten Salts ◽

Eutectic Mixture ◽

Ceramic Materials ◽

Heat Transfer Medium ◽

Ceramic Samples

The molten salts can provide many possibilities for their use, e.g., an electrolyte in fuel cells or as a heat transfer medium and an oxygen transporter for flameless oxidation in molten salt oxidation (MSO) technology. The environment of molten salts is very corrosive; therefore, it is crucial to find such ceramic materials, which could be used as reactor filling for MSO technology. The aim of this work was to research physical properties of ceramic samples after the exposure within the eutectic mixture of Na2CO3, K2CO3, Li2CO3 and temperature of 700 °C.

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ANALYSIS OF COLOR CHARACTERISTICS FOR VARIOUS COMBINATIONS OF THE CORE MATERIALS AND ALLCERAMIC MATERIALS

Российский стоматологический журнал ◽

10.18821/1728-2802-2018-22-1-50-54 ◽

2018 ◽

Vol 22 (1) ◽

pp. 50-54

Author(s):

A. N Ryakhovsky ◽

Yury Viktorovich Tikhon

Keyword(s):

Ceramic Materials ◽

Chromium Alloy ◽

Cobalt Chromium ◽

Significant Group ◽

The Core ◽

Ceramic Samples ◽

All Ceramic ◽

Removable Prosthesis ◽

Color Analyzer ◽

Core Materials

This paper is devoted to the analysis of the optical interaction of materials for the fabrication of the post-core and all-ceramic framework of a non-removable prosthesis. The gold-palladium alloy, cobalt-chromium alloy and composite materials were chosen as the material for restoration of the core of teeth. The first group of ceramic samples consisted of zirconia zirconia disks (Dental Direkt, Germany), 0.3 mm thick and 0.5 mm thick with different transparency (high, medium and low). The second group of framed ceramic materials ware disks from lithium disilicate E.max Press (Ivoclar Vivadent, Liechtenstein), 0.4 mm thick and 0.6 mm thick from blanks of different transparency (high transparency, low transparency, medium opacity, high opacity). The study was based on the principle of comparative analysis of the obtained samples on a spectrometric color analyzer and comparing the reflection coefficient. The dependence of the brightness of the finished restoration on the type of the core materials and all-ceramic discs of different thicknesses has been determined, which should be taken into account when calculating the final ceramic restoration color. It has been established that a composite base should be used for prosthetics of an aesthetically significant group of teeth. In turn, core materials from CoCch and Au alloys according to colorimetric characteristics are not suitable for this prosthesis and they must be primed with opaque materials beforehand.

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Physical Properties of Porous Clay Ceramic-Ware

Journal of Engineering Materials and Technology ◽

10.1115/1.4004158 ◽

2011 ◽

Vol 133 (3) ◽

Cited By ~ 15

Author(s):

A. K. Plappally ◽

I. Yakub ◽

L. C. Brown ◽

W. O. Soboyejo ◽

A. B. O. Soboyejo

Keyword(s):

Mechanical Properties ◽

Physical Properties ◽

Raw Materials ◽

Ceramic Materials ◽

Ceramic Ware ◽

Strength Development ◽

Similar Materials ◽

Ceramic Manufacture ◽

Materials Used ◽

Clay Ceramics

The focus of this study is on the physical properties of clay ceramic materials compatible for drinking water filtration. A multiparameter lognormal multivariate regression approach is proposed for assessing the combined effects of quantity of compositional constituent of raw materials used in ceramic manufacture on toughness. The approach was validated for two specimen types (T- and S-specimens) derived from a circular base of the frustum shaped, porous clay ceramic ware (PCCW). The PCCW were manufactured from clay and sieved sawdust mixed at distinct volume fractions. The variation of the porosity and density of the PCCW was studied with respect to the amounts of sawdust and clay used in the manufacturing. The research helped to clearly define the roles of clay and sawdust quantities for strength development in both T- and S-specimen. A generalized experimental approach is proposed for estimation of mechanical properties of clay ceramics as a function of the material constituent fractions. A polynomial relationship was developed between the compressive strength and density of the PCCW material. The statistical model expressions developed herein may be used for the prediction of material and mechanical properties of similar materials, including natural and engineered 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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Thermodynamic Prehistory in the Formation of the Internal Structure of Highly Stable Ferroelectric Materials

Applied Sciences ◽

10.3390/app8101897 ◽

2018 ◽

Vol 8 (10) ◽

pp. 1897 ◽

Cited By ~ 2

Author(s):

Konstantin Andryushin ◽

Inna Andryshina ◽

Lidiya Shilkina ◽

Svetlana Dudkina ◽

Iliya Verbenko ◽

...

Keyword(s):

Lead Zirconate Titanate ◽

Piezoelectric Ceramic ◽

Ceramic Materials ◽

Lead Zirconate ◽

Ferroelectric Materials ◽

Density Structure ◽

Optimal Conditions ◽

X Ray ◽

Ceramic Samples ◽

Grain Structures

We investigated and presented our results for the dependence of the characteristics of the crystalline and grain structures of the PCR-13 material (based on the lead zirconate titanate (PZT) system), which was sintered in various ways, on the regulations for its preparation. The data from the microfluorescence analysis of the surface of ceramic materials were provided, which allowed us to state that micro X-ray fluorescence spectrometry (MICRO–XRF), supplemented by mathematical statistics, allows us to trace even small changes in the chemical composition of ceramic samples, reliably characterize the degree of surface homogeneity and provide strict mathematical conclusions related to the reproducibility of the properties of manufactured piezoelectric ceramic materials. Based on the obtained data, the optimal conditions for ceramics have been selected, which ensure homogeneity, high-density structure and reproducibility of the characteristics. This allows us to reliably use the material in frequency-selective equipment.

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BÖHLER W403 VMR

Alloy Digest ◽

10.31399/asm.ad.ts0721 ◽

2013 ◽

Vol 62 (9) ◽

Keyword(s):

Heat Treatment ◽

Chemical Composition ◽

Physical Properties ◽

Tool Steel ◽

Raw Materials ◽

Heat Treating ◽

Diffusion Annealing ◽

Selection Of

Abstract Böhler (or Boehler) W403 VMR is a tool steel with outstanding properties, based not only on a modified chemical composition, but on the selection of highly clean raw materials for melting, remelting under vacuum (VMF), optimized diffusion annealing, and a special heat treatment. This datasheet provides information on composition, physical properties, and elasticity. It also includes information on forming and heat treating. Filing Code: TS-721. Producer or source: Böhler Edelstahl GmbH.

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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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