Glass–ceramic frits for porcelain stoneware bodies: Effects on sintering, phase composition and technological properties

Abstract Chemical composition, structure, and technological properties have been investigated for metal powder compositions (MPCs) of a new six-component TiAl-based alloy with Gd microadditions: Ti-31.0Al-2.5V-2.5Nb-2.5Cr-0.4Gd, wt.% (Ti-44.5Al-2V-1Nb-2Cr-0.1Gd, at.%). Three MPCs fractions (10–63, 40–100, 80–120 μm) were produced by electrode induction melting and inert gas atomization technique and targeted for the additive synthesis of parts. It is shown that the chemical composition of the MPCs for the main elements corresponds to that of the electrode. In contrast, a 1.5-fold increase of the oxygen content in the MPCs was observed, which is being the result of natural oxidation of powder particles upon air environment due to developed specific surface. It has been determined that the phase composition of the MPCs (γ+α(α2)+β) differs from the equilibrium phase composition of the electrode (γ+α2)+β0/B2) and corresponds to a rapidly quenched metastable state, which indicates high solidification rates in the atomization process, exceeding critical cooling rates of the alloy. The technological properties, specifically the powder flowability, were found to be improved for 40–100 and 80–120 μm fractions, making them applicable for additive synthesis of parts from the studied alloy by selective electron-beam melting method

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Forming and Utilizing Ferrochromium Production Waste

Materials Science Forum ◽

10.4028/www.scientific.net/msf.989.492 ◽

2020 ◽

Vol 989 ◽

pp. 492-497 ◽

Cited By ~ 1

Author(s):

Ivan D. Kascheev ◽

Vladimir I. Zhuchkov ◽

Oleg V. Zayakin

Keyword(s):

Phase Composition ◽

Physical Properties ◽

Russian Federation ◽

Production Waste ◽

Technological Properties ◽

High Carbon ◽

Chemical Phase ◽

Physico Chemical ◽

Thermo Physical Properties ◽

Ferrochromium Slag

Analysis of forming chromium-bearing ferroalloys production waste in Russian Federation was performed. Chemical, phase, fractional compositions and physico-chemical, technological properties of high-carbon ferrochromium slag were defined. Physico-chemical, thermo-mechanical and thermo-physical properties of fire-resistant materials, obtained from ferrochromium production slag and dust, were researched. It was shown that researched waste may be utilized as raw for fire-resistant materials production. Because of their chemical and phase composition, researched materials may be utilized for production of forsterite-spinel-based and forsterite-spinel-periclase-based fire-resistant materials. Technological properties of researched materials allow obtaining dense strength fire-resistant materials. Such fire-resistant materials are promising in the field of ferrous metallurgy (lining up furnaces, ladles and overflow launders in ferroalloys production).

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Influence of CaO–ZrO2–Al2O3–SiO2 glass-ceramic frits on the technological properties of porcelain stoneware bodies

Ceramics International ◽

10.1016/j.ceramint.2011.03.010 ◽

2011 ◽

Vol 37 (6) ◽

pp. 1851-1858 ◽

Cited By ~ 3

Author(s):

C. Siligardi ◽

P. Miselli ◽

L. Lusvarghi ◽

M. Reginelli

Keyword(s):

Glass Ceramic ◽

Technological Properties ◽

Sio2 Glass

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Influence of SiO2/Al2O3 Molar Ratio on Phase Composition and Surfaces Quality of Aluminum Silicate Sanitary Glazes in the SiO2-Al2O3-CaO-Na2O System

Archives of Metallurgy and Materials ◽

10.1515/amm-2016-0279 ◽

2016 ◽

Vol 61 (4) ◽

pp. 1739-1746 ◽

Cited By ~ 3

Author(s):

M. Leśniak ◽

J. Partyka ◽

M. Sitarz

Keyword(s):

Surface Roughness ◽

Phase Composition ◽

Surface Quality ◽

Glass Ceramic ◽

Glass Phase ◽

Molar Ratio ◽

Aluminum Silicate

Abstract This paper presents the results of research on aluminum silicate sanitary glazes in the SiO2-Al2O3-CaO-Na2O system with different SiO2/Al2O3 molar ratio. XRD, SEM-EDS and FITR measurement indicated that SiO2/Al2O3 molar ratio has a significant impact on the phase composition of the obtained glazes. Glass-ceramic glazes were obtained that consisted of both the glass phase and pseudowollastonite (Ca3[SiO3]3) or anorthite (Ca[Al2Si2O8]) crystals. Subsequently, the influence of phase composition on surface quality (roughness) was examined for the obtained samples. On the basis of the conducted examination of glaze surface roughness was observed that glazes of extreme SiO2/Al2O3 molar ratio are characterized with greatest surface roughness when compared to other glazes.

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Microstructure Characterization of Superfine WC-Co Powders

Solid State Phenomena ◽

10.4028/www.scientific.net/ssp.203-204.351 ◽

2013 ◽

Vol 203-204 ◽

pp. 351-354 ◽

Cited By ~ 2

Author(s):

Grzegorz Moskal ◽

Krzysztof Szymański ◽

Agnieszka Tomaszewska ◽

Hanna Myalska

Keyword(s):

Phase Composition ◽

Chemical Composition ◽

Thermal Spraying ◽

Point Of View ◽

Microstructural Properties ◽

Technological Properties ◽

Composite Powders ◽

Distribution Maps ◽

Macro Scale

In this paper results of tests concerning the WC/Co fine-crystalline composite powders type 88/12 and 83/17 provided for thermal spraying of layers resistant to abrasion are presented. Tests which characterize basic technological properties were performed since these properties are essential from thermal spraying point of view. Microstructural properties are essential as well because they allow evaluation of morphology of powders by SEM method with an analysis of chemical composition in micro-areas. Moreover, the phase composition was characterized by XRD in macro scale and by EBSD in microareas including distribution maps of individual phase components in all particles of the powders.

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Study of phase composition on resorption glass-ceramic соatings for titanium

Eastern-European Journal of Enterprise Technologies ◽

10.15587/1729-4061.2014.20071 ◽

2014 ◽

Vol 1 (6(67)) ◽

pp. 49

Author(s):

Галина Миколаївна Шадріна ◽

Оксана Вікторівна Саввова ◽

Дарина Юріївна Шемет

Keyword(s):

Phase Composition ◽

Glass Ceramic

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Alumina silicate glass-ceramic materials for electrical purposes

Scientific research on refractories and technical ceramics ◽

10.35857/2663-3566.120.17 ◽

2020 ◽

Vol 120 ◽

pp. 174-185

Author(s):

O. V. Savvova ◽

G. K. Voronov ◽

S. A. Ryabinin ◽

E. Yu. Fedorenko ◽

V. D. Timofeev

Keyword(s):

Heat Treatment ◽

Phase Composition ◽

Electrical Properties ◽

Silicate Glass ◽

Glass Ceramic ◽

Breakdown Strength ◽

Chemical Properties ◽

Ceramic Materials ◽

Silicate System ◽

Glass Ceramic Materials

The prospects for use of glass-ceramic materials as electrical products were analyzed. The priority of a self-organized macro- and nanostructure formation of the glass-ceramic materials under conditions of low-temperature heat treatment to ensure their high physical and chemical properties was shown. The choice of an alumina silicate system of materials for obtaining high-strength glass-ceramic materials with improved electrical properties was substantiated, taking into account the aspects of energy saving. The technological modes of cooking, forming and heat treatment of glass-ceramic materials were determined. Resistance, dielectric constant and dielectric loss tangent at 106 Hz were measured using an E6-13A teraometer on a trielectrode system at a temperature of +29 °C and a DE-5000 RLC meter. Electric strength (Em) and cold crushing strength were determined according to GOST 24409-80. Tensile strength according to GOST 32281.1-2013 (EN 1288-1: 2000). The decisive influence on the electrical properties of glass-ceramic materials the crystalline phases of α-cordierite, β-spodumene or lithium disilicate, as well as the residual glass phase composition has been established. The structure influence of the alumina silicate glass-ceramic materials on the provision of their electrical (tgδ∙104 = 70 ÷ 80; ε = 8.0 ÷ 9.3 (at f = 106 Hz); lg ρv = 12.9 ÷ 15.0 (ρv, Ohm·cm at Т = 20 °C) and mechanical (K1C = 3.15 ÷ 4.3 МPа∙м1/2; σ comp = 630 ÷ 700 МPа, σbend = 300 ÷ 350 МPа; KCU = 4.8 ÷ 5.9 kJ/m2) properties. It was found that, the defining condition for the developed glass-ceramic materials use as insulating materials under repeated exposure to high-temperature operations is their high breakdown strength Em = 37 ÷ 42 MV/m and thermal shock resistance due to low TCLE (α∙107 = 21.5 ÷ 31.8 deg-1). The influence of phase composition and structure of the alumina silicate glass-ceramic materials on their electrical and mechanical properties was analyzed. A comparative assessment of the known ceramic and glass-ceramic materials for electrical purposes has made it possible to establish the feasibility of using the developed materials as substrates in the design of a hybrid integrated circuit, vacuum-tight shell and capacitor dielectrics.

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Preparation and Characterization of Bioactive and Magnetic Biphasic Thermo-Seeds Material

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.834-836.301 ◽

2013 ◽

Vol 834-836 ◽

pp. 301-304

Author(s):

Jian An Liu ◽

Xue Na Yang ◽

Mei Mei Zhang

Keyword(s):

Magnetic Property ◽

Phase Composition ◽

Glass Ceramic ◽

Body Fluid ◽

Glass Ceramics ◽

Magnetic Behavior ◽

In Vitro Bioactivity ◽

Magnetic Glass

A novel biphasic material has been synthesized from a melt-derived bioactive glass (45S5) and a glass-ceramic obtained from a melt-derived magnetic glass-ceramics for hyperthermia application. The biphasic material obtained from a mixture 1:1 of these components. The phase composition was investigated by XRD. The magnetic property was measured by VSM. The in vitro bioactivity was investigated by simulated body fluid (SBF) soaking experiment. The glass-ceramic shows magnetic behavior and bioactive, useful for hyperthermia.

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Waste Diatomaceous Earth as Cementitious Binder Constituent

Materials Science Forum ◽

10.4028/www.scientific.net/msf.865.1 ◽

2016 ◽

Vol 865 ◽

pp. 1-5 ◽

Cited By ~ 1

Author(s):

Theodor Staněk

Keyword(s):

Phase Composition ◽

Diatomaceous Earth ◽

Hydration Heat ◽

Technological Properties ◽

Fgd Gypsum ◽

Heat Development ◽

Cementitious Binder ◽

Cement Mixture

Paper is aimed at study of preparation possibilities of cementitious binders with waste diatomaceous earth. In the first step, the influence of ground diatomaceous earth on properties of cement mixture was studied. In the next step, diatomaceous earth was calcinated and, lastly, the influence of replacing FGD-gypsum with anhydrite II as a setting controller in the mixture containing calcined diatomaceous earth was monitored. Technological properties of the prepared mixtures were measured and compared with cement standard. For studying the influence of phase composition and microstructure of cements hardened by both untreated and calcinated diatomaceous earth, hardened cements were tested by DTA and their porosities were measured. The results show that it is possible to prepare binder containing calcinated diatomaceous earth which has slightly lower early strengths but higher long-term strengths and lower hydration heat development.

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