scholarly journals Novel yellow to blackish green Ni-doped aluminium titanate ceramic pigments

2021 ◽  
Vol 15 (3) ◽  
pp. 314-318
Author(s):  
Junhua Chen ◽  
Yin Li ◽  
Guo Feng ◽  
Feng Jiang ◽  
Qianqian Zhao ◽  
...  
Keyword(s):  
Solid Solution ◽  
Lattice Distortion ◽  
Solid State Reaction Method ◽  
Ceramic Pigments ◽  
Doping Content ◽  
Nickel Doping ◽  
Nickel Ions ◽  
Reaction Method ◽  
Aluminium Titanate ◽  
Titanate Ceramic

Novel yellow to blackish green Ni-doped aluminium titanate (Al2TiO5) ceramic pigments were synthesized by solid-state reaction method at 1400 ?C. Effects of nickel doping content on phase composition, microstructure, optical properties and stability were studied. The results show that the higher content of Al2TiO5 phase and the reduction of the lattice distortion of aluminium titanate could be attributed to the entry of nickel ions into aluminium titanate lattice resulting in the formation of solid solution. Ni-doped aluminium titanate ceramic pigments show exceptional glaze colouring and are expected to be promising high-temperature pigments.

Effects of different sintering temperatures on microstructural, transport, and magnetic properties of La0.93Sb0.07MnO3 compound

2014 ◽  
Vol 28 (24) ◽  
pp. 1450166
Author(s):  
Q. Wang ◽  
P. Duan ◽  
J. Y. Wang ◽  
L. Chang ◽  
J. X. Deng ◽  
...  
Keyword(s):  
Grain Size ◽  
Magnetic Properties ◽  
Transition Temperature ◽  
Solid State ◽  
Lattice Distortion ◽  
Solid State Reaction Method ◽  
Metal Insulator Transition ◽  
Metal Insulator ◽  
Reaction Method ◽  
Different Temperatures

Polycrystalline La 0.93 Sb 0.07 MnO 3 ceramics were synthesized using solid-state reaction method. The samples were sintered at different temperatures ranging from 1100°C to 1200°C. It is observed that microstructural, transport and magnetic properties of La 0.93 Sb 0.07 MnO 3 compounds strongly depend on sintering temperatures (TS). With TS increasing, the degree of lattice distortion has been weakened, the grain size has become larger and grain boundaries have decreased. Furthermore, the resistivity was reduced, and metal–insulator transition temperature was enhanced; the saturation magnetization per unit mass has decreased with TS increasing. These effects of different TS on physical properties can be explained by the structure distortion and grain boundary contributions for La 0.93 Sb 0.07 MnO 3 compounds.

Synthesis of Aluminum Titanate Solid Solution by Solid State Reaction of Fine Commercial Al2O3, TiO2 and MgO Powders

2007 ◽  
Vol 336-338 ◽  
pp. 1327-1330 ◽  
Author(s):  
Gang Xu ◽  
Con Jiang Tu ◽  
Wen Jian Weng ◽  
Pi Yi Du ◽  
Ge Shen ◽  
...  
Keyword(s):  
Solid Solution ◽  
Solid State ◽  
Solid State Reaction ◽  
Raw Materials ◽  
Phase Evolution ◽  
Solid State Reaction Method ◽  
Synthesis Temperature ◽  
Aluminum Titanate ◽  
Reaction Method ◽  
Α Al2o3

The synthesis of aluminum titanate solid solution (Al2(1-x)MgxTi1+xO5, x=0, 0.1, 0.2) powders was realized by solid state reaction method using fine commercial α-Al2O3, TiO2 and MgO powders as raw materials. The effect of the introduced amount of MgO on the phase formation of aluminum titanate solid solution was investigated by XRD following the phase evolution. It was revealed that the introduction of MgO strongly affects the formation of Al2(1-x)MgxTi(1+x)O5 solid solution. The easily formed MgTi2O5 acts as the nucleus prompting the formation and lowering the synthesis temperature. The microstructure and properties of the solid solution ceramics were also studied by SEM and measuring the fracture strength and the thermal expansion coefficient.

Effects of Nb Doping on Dielectric and Ferroelectric Properties of Bi4Ti3-xNbxO12+x/2 Ceramics

2010 ◽  
Vol 97-101 ◽  
pp. 461-464
Author(s):  
Xiang Feng ◽  
Hua Wang ◽  
Xiao Dan Huang
Keyword(s):  
Oxygen Vacancies ◽  
Remanent Polarization ◽  
Ferroelectric Properties ◽  
Solid State Reaction Method ◽  
Temperature Decrease ◽  
Doping Content ◽  
Reaction Method ◽  
Method Effects ◽  
Nb Doping ◽  
Xrd Patterns

Bi4Ti3-xNbxO12+x/2 (BNT) ceramics were prepared by a solid-state reaction method. Effects of Nb doping on dielectric and ferroelectric properties of BNT were investigated. XRD patterns show that Nb5+ substitutions do not change the phase structure. With the increase of Nb doping, dielectric constant and Curie temperature decrease gradually. At the same time, dielectric loss peaks become flatter and dielectric losses become smaller due to the decrease of oxygen vacancies derived from the introduction of Nb5+ at Ti4+ site in BNT. Remanent polarization Pr and coercive field EC of BNT ceramics are both larger than those of BIT without Nb doping. With the increase of Nb doping from 0 to 0.045, Pr increases to the largest value of 17 μC/cm2 and EC decreases to the lowest value of 87 kV/cm, but Pr will decrease when Nb doping content is over 0.045.

Thermoelectric properties of hole-doped Yb1-xPbxBaCo4O7+δ ceramics

2015 ◽  
Vol 29 (14) ◽  
pp. 1550082 ◽  
Author(s):  
Yubo Chen ◽  
Runxiang Ma ◽  
Kunlun Wang ◽  
Feng Gao ◽  
Xing Hu ◽  
...  
Keyword(s):  
Thermal Conductivity ◽  
Electrical Resistivity ◽  
Solid State ◽  
Figure Of Merit ◽  
Solid State Reaction Method ◽  
Doping Content ◽  
Reaction Method ◽  
Dimensionless Figure Of Merit ◽  
Ceramic Samples ◽  
Pb Doping

The effects of Pb doping on the thermoelectric (TE) properties of Yb 1-x Pb x BaCo4O7+δ (x = 0, 0.02, 0.04, 0.06, 0.08 and 0.1) ceramic samples prepared by the solid-state reaction method were investigated from 383 K to 973 K. The results showed that with increase of the Pb content, the electrical resistivity decreased remarkably, meanwhile the Seebeck coefficient decreased slightly, resulting in an enhancement of the power factor (PF). The effect of Pb doping on the thermal conductivity was insignificant. According to the PF and the dimensionless figure of merit (ZT) value, the optimum Pb doping content was x = 0.08. The ZT value reached 0.12 at 973 K, being 69.5% higher than that of the sample without Pb doping.

The Influence and Mechanism of the Electrical Conductivity of (Ca,Sr)Bi4Ti4O15 Piezoelectric Ceramics by Doping of CeO2

2007 ◽  
Vol 280-283 ◽  
pp. 263-266 ◽  
Author(s):  
Liao Ying Zheng ◽  
Guo Rong Li ◽  
Wang Zhong Zhang ◽  
Qing Rui Yin
Keyword(s):  
Layered Structure ◽  
Oxygen Vacancies ◽  
Piezoelectric Ceramics ◽  
Solid State Reaction Method ◽  
Doping Content ◽  
Orthorhombic Structure ◽  
X Ray Diffraction ◽  
Perovskite Layer ◽  
Reaction Method ◽  
X Ray

In this paper, the bismuth-layered structure piezoelectric ceramics (Ca,Sr)Bi4Ti4O15 doped with CeO2 are prepared by the solid state reaction method. The crystal structure of the ceramics is determined by X-ray diffraction and the single orthorhombic structure phase is found. However, the doping of CeO2 increase the lattice parameters a, b, c. As a result, the ions of Ce enter into the lattice of the bismuth-layered structure and occupy A sites in the perovskite layer of bismuthlayered structure lattice. The temperature dependence of the conductivity shows that the resistivity increases by doping of CeO2 and reaches its maximum when the doping content is 0.4mol%. The mechanism of the CeO2 doping is also analyzed. By the investigation of XPS, the Ce ions have two types of valences: Ce3+ and Ce4+. The existence of Ce ions strengthened the weak Bi-O bonding and decreased the oxygen vacancies in the lattice, so the ceramics have lower conductivity.

Enhanced ferroelectricity/piezoelectricity, bright blue/yellow emission and excellent thermal stability in Ca1−x(LiDy)x/2Bi4Ti4O15 lead-free multifunctional ceramics

RSC Advances ◽  
2016 ◽  
Vol 6 (20) ◽  
pp. 16387-16394 ◽  
Author(s):  
Ping Xiao ◽  
Qiaoji Zheng ◽  
Mijie Tian ◽  
Yongquan Guo ◽  
Xiaochun Wu ◽  
...  
Keyword(s):  
Thermal Stability ◽  
Solid Solution ◽  
Solid State ◽  
Solid State Reaction Method ◽  
Lead Free ◽  
Yellow Emission ◽  
Conventional Solid State Reaction ◽  
Excellent Thermal Stability ◽  
Reaction Method ◽  
Bright Blue

A new lead-free solid solution of Ca1−x(LiDy)x/2Bi4Ti4O15 has been developed and prepared by a conventional solid state reaction method.

Crystal Structure and Multiferroic Behaviors of Solid Solution (1-y)BiFe(1-x)MnxO3-yBaTiO3

2019 ◽  
Vol 944 ◽  
pp. 526-530
Author(s):  
Mei Mei Wu ◽  
Lin Feng He ◽  
Guo Hai Wei ◽  
Yu Qing Li
Keyword(s):  
Crystal Structure ◽  
Solid Solution ◽  
Solid State ◽  
Solid State Reaction ◽  
Ferroelectric Properties ◽  
Hysteresis Loops ◽  
Solid State Reaction Method ◽  
Weak Ferromagnetism ◽  
Reaction Method ◽  
Mn Doping

It is expected that BiFeO3-based materials will have both ferroelectricity and ferromagnetism. (1-y)BiFe(1-x)MnxO3-yBaTiO3 system was prepared using solid state reaction method. The goal of this study is to uncover the impacts of Mn doping and BaTiO3 content on the crystal structure, magnetism and ferroelectric properties. By forming a solid solution with BaTiO3, stable perovskite BiFeO3 was achieved. The rhombohedrally distorted (1-y)BiFe(1-x)MnxO3-yBaTiO3 showed weak ferromagnetism due to the composition of BaTiO3 and the doping of Mn ion. 0.8BiFe0.9Mn0.1O3-0.2BaTiO3 and 0.7BiFe0.9Mn0.1O3-0.3BaTiO3 ceramics exhibited typical P-E hysteresis loops.

Magnetic and dielectric properties of 3Y-TZP/strontium doped barium ferrite composite

2015 ◽  
Vol 08 (04) ◽  
pp. 1550040 ◽  
Author(s):  
Chao Zhang ◽  
Shan-Shan Wang ◽  
Rui-Song Guo ◽  
Guang-Lan Cai ◽  
Wei-Na Guo ◽  
...  
Keyword(s):  
Dielectric Constant ◽  
Magnetic Properties ◽  
Dielectric Properties ◽  
Solid State ◽  
Dielectric Loss ◽  
Barium Ferrite ◽  
Lattice Distortion ◽  
Solid State Reaction Method ◽  
Reaction Method ◽  
Magnetic And Dielectric Properties

Magnetic and dielectric properties of 3Y-TZP/20 wt.% Ba 1-x Sr x Fe 12 O 19 (x = 0, 0.25, 0.5, 0.75) composites prepared by solid state reaction method are investigated. The magnetic properties are improved in the composites with the strontium doped barium ferrite. When x = 0.25, the saturation magnetization of the ferrite reaches the maximum. This is due to the migration of Fe 3+ induced by the Sr 2+ doping. The dielectric properties are also improved in the composite with the strontium doped barium ferrite. When x = 0.5, the dielectric constant and dielectric loss possess the maximum. This is caused by the lattice distortion resulting from the Sr 2+ doping. The dielectric properties are analyzed by the universal relaxation law.

Effect of Annealing on the Structure and Dielectric Properties in PZT-PCoN Ceramics

2008 ◽  
Vol 55-57 ◽  
pp. 49-52
Author(s):  
Naratip Vittayakorn ◽  
N. Chaiyo ◽  
R. Muanghlua ◽  
A. Ruangphanit ◽  
Wanwilai C. Vittayakorn
Keyword(s):  
Solid Solution ◽  
Dielectric Properties ◽  
Solid State Reaction Method ◽  
Relaxor Ferroelectric ◽  
Dielectric Constants ◽  
X Ray Diffraction ◽  
Reaction Method ◽  
X Ray ◽  
Maximum Dielectric Constant ◽  
Diffraction Patterns

he solid solution between the normal ferroelectric Pb(Zr1/2Ti1/2)O3 (PZT) and relaxor ferroelectric Pb(Co1/3Nb2/3)O3 (PCoN) was synthesized by the solid state reaction method. Sintered PZT-PCoN ceramics were annealed at temperatures ranging from 850 to 1,100°C for 4 h. X-ray diffraction patterns revealed changes of crystalline structure after annealing, which could be correlated to the accompanied changes in dielectric properties. Furthermore, significant improvements in the dielectric responses were observed in this system. After annealing, a huge increase of up to 200% occurred in the dielectric constants, especially near the temperature of maximum dielectric constant.

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