A new direction in the creation of ceramic materials with a specified phase composition and structure. Part I. Preparation of binders for ceramic production by the sol-gel method. 3. Hydrolysis and gel formation in ethylsilicate binders without organic solvents

1999 ◽  
Vol 40 (5-6) ◽  
pp. 179-184
Author(s):  
G. D. Semchenko
Keyword(s):  
Phase Composition ◽  
Organic Solvents ◽  
Sol Gel ◽  
Ceramic Materials ◽  
Ceramic Production ◽  
Gel Formation ◽  
Gel Method ◽  
Sol Gel Method ◽  
Composition And Structure ◽  
The Creation

The Preparation and Properties of (Na0.5+xK0.5-2xLix)NbO3 Lead-Free Piezoelectric Ceramics

2014 ◽  
Vol 602-603 ◽  
pp. 826-829
Author(s):  
Hong Yun Ma ◽  
Yan Gai Liu ◽  
Jin Qiu Zhao ◽  
Zhao Hui Huang ◽  
Ming Hao Fang
Keyword(s):  
Phase Composition ◽  
Piezoelectric Properties ◽  
Ferroelectric Properties ◽  
Sol Gel ◽  
Piezoelectric Ceramics ◽  
Lead Free ◽  
Piezoelectric Constant ◽  
Pressureless Sintering ◽  
Gel Method ◽  
Sol Gel Method

In this paper, the KNN powders with Li+ substituted (K0.5Na0.5)+ were prepared by the sol-gel method in order to make powders pure, (Na0.50+xK0.50-2xLix) -NbO3 (x=0, 0.04, 0.06, 0.08) ceramics were prepared by pressureless sintering. The phase composition of powders was determined by XRD. The effects of the Li+ substitution on piezoelectric and ferroelectric properties of ceramics were systematically studied for determining optimal Li+ content. Li+ can significantly increase the piezoelectric constant of ceramic. When Li+ content was 0.04, piezoelectric properties of ceramics were the best, d33=115 pC/N, Pr=6.35 μC/cm2, Ec=14.24 kV/cm.

scholarly journals Ceramic Materials. Preparation and Properties of ZrO2-Coated BaTiO3 Composite Particles by Sol-Gel Method with Zr-Alkoxide.

2001 ◽  
Vol 50 (6) ◽  
pp. 630-633 ◽  
Author(s):  
Takashi HAYASHI ◽  
Akihiro TANIMURA ◽  
Hiroshi SHINOZAKI ◽  
Kazuya TAKANASHI ◽  
Hideyuki AOKI ◽  
...  
Keyword(s):  
Sol Gel ◽  
Ceramic Materials ◽  
Composite Particles ◽  
Gel Method ◽  
Sol Gel Method ◽  
Materials Preparation

Structural and magnetic properties of Sb3+ ions doped Ni-Ba-Co ferrite prepared by sol-gel method

2021 ◽  
Author(s):  
Yanchun Zhang ◽  
Aimin Sun ◽  
Liqiong Shao ◽  
Zhaxi Suonan
Keyword(s):  
Magnetic Properties ◽  
Spinel Phase ◽  
Spinel Ferrite ◽  
Energy Dispersive Spectrometer ◽  
Sol Gel ◽  
X Ray Diffraction ◽  
Gel Method ◽  
Sol Gel Method ◽  
Composition And Structure ◽  
Xrd Patterns

Abstract In the present work, nanocrystalline Sb3+ ions doped Ni0.2Ba0.1Co0.7Fe2−xSbxO4 (0 ≦ x ≦ 0.1, step by 0.025) ferrites were prepared via sol-gel method. The spinel-phase structure of samples can be confirmed by X-ray diffraction (XRD) patterns. The composition and structure were further studied by fourier transform infrared spectroscopy (FTIR). There were two typical characteristic bands ν1 and ν2 related to the stretching vibrations in spinel ferrite in FTIR spectra. Energy dispersive spectrometer (EDS) analyzed the elements of samples. It indicated that the elements of Ni, Ba, Co, Fe, O and Sb existed in the samples. Vibrating sample magnetometer was used to characterize magnetic properties. The saturation magnetization decreased from 57.65 emu/g to 44.50 emu/g with the increasing Sb3+ ions content, which is attributed to Fe3+ ions replaced by the Sb3+ ions. Remanent magnetization and coercivity first decreased and then increased slightly.

Al2O3 AND ZrO2 CERAMIC MATERIALS OBTAINED BY SOL-GEL METHOD

2021 ◽  
pp. 61-73
Author(s):  
Yu.E. Lebedeva ◽  
◽  
N.E. Shchegoleva ◽  
V.A. Voronov ◽  
St.S. Solntcev ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Zirconium Dioxide ◽  
Monoclinic Phase ◽  
Eutectic Composition ◽  
Sol Gel ◽  
Ceramic Materials ◽  
Gel Method ◽  
Sol Gel Method ◽  
Zro2 System ◽  
Sintered Materials

The rheological properties, processes of structure and phase formation of the Al2O3–ZrO2 system compositions obtained by the sol-gel method have been investigated. The temperature range of crystallization of the compositions is 900–1100 °C. With an increase in the concentration of zirconium dioxide in the system, the temperature of the transition from the tetragonal to the monoclinic phase decreases. The effect of the ratio of the components in the initial solutions and the temperature regime of heat treatment of gels on the physicochemical properties of nanopowders and sintered materials has been studied. Ceramic materials of eutectic composition give the highest density and lower values of porosity and water absorption.

EFFECTS OF CONCENTRATION OF TTIP PRODUCER AGENT ON ZrO2/NANOTiO2 POWDER SYNTHESIS

2008 ◽  
Vol 22 (18n19) ◽  
pp. 3216-3224
Author(s):  
E. MOHAMMADI ◽  
H. ABDIZADEH ◽  
H. R. BAHARVANDI ◽  
A. M. HADIAN
Keyword(s):  
Composite Powder ◽  
Mixed Oxides ◽  
Sol Gel ◽  
Ceramic Materials ◽  
Optimum Concentration ◽  
Zirconium Titanate ◽  
Powder Synthesis ◽  
Xrd Pattern ◽  
Gel Method ◽  
Sol Gel Method

Ceramic materials based on zirconium titanate prepared by sol-gel method are used extensively in microwave, telecommunications and catalysis. In order to investigate the effects of concentration of TTIP, a series of ZrO 2– TiO 2 mixed oxides was prepared by a modified sol–gel method and varying mole fraction of TTIP from 0.002, to 0.1. The samples were characterized by XRD, TG/DTA, and SEM. The XRD pattern of 370°C calcined samples showed the formation of TiO 2 phase. The optimum concentration of TTIP in the zirconia-titania mixed oxide in the precipitation solution was 0.032 for obtaining complete coating. Each oxide was calcined between 250 and 620°C. The results showed that concentration of TTIP have a pronounced effect on particle size of the calcined zirconium titanate ( ZT ) powders. The results showed that the surface area of the composite powder increased proper to monolithic ZrO 2 powder.

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