Sintering and Dielectric Properties of BaTiO3 Nano-Particle Prepared by Aerosol Plasma Pyrolysis Process

2007 ◽  
Vol 350 ◽  
pp. 35-38
Author(s):  
Takayuki Kodera ◽  
Takashi Ogihara ◽  
Nobuo Ogata ◽  
Koji Nakane ◽  
Ryo Yoshida ◽  
...  
Keyword(s):  
Lactic Acid ◽  
Dielectric Properties ◽  
Sintering Temperature ◽  
Precursor Solution ◽  
Arc Plasma ◽  
Nano Particle ◽  
Pyrolysis Process ◽  
Air Atmosphere ◽  
Plasma Pyrolysis ◽  
Complex Precursor

BaTiO3 nano-sized powders were successfully prepared by spray pyrolysis using multiphase plasma under the air atmosphere. The particles characteristics of BaTiO3 nano-sized powders were studied by SEM and XRD. The effect of volume of arc plasma and precursor solution on the formation of BaTiO3 nano-sized powders was investigated. The use of Ba-Ti complex precursor solution derived from lactic acid led to formation of tetragonal BaTiO3 nano-sized powders with 140 nm size. As for BaTiO3 ceramics, the effect of sintering temperature on relative density and the temperature dependence of dielectric properties were investigated.

Synthesis and Characterization of BaTiO3 Nano-Particle by Aerosol Plasma Pyrolysis Process

2006 ◽  
Vol 320 ◽  
pp. 135-138 ◽  
Author(s):  
Takayuki Kodera ◽  
Hajime Horikawa ◽  
Takashi Ogihara ◽  
Nobuo Ogata ◽  
Koji Nakane ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Particle Size ◽  
Precursor Solution ◽  
Synthesis And Characterization ◽  
Nano Particle ◽  
Pyrolysis Process ◽  
Air Atmosphere ◽  
Plasma Pyrolysis ◽  
Batio3 Nanoparticles

Homogeneous BaTiO3 nano-sized powders were successfully prepared by spray pyrolysis using multiphase plasma under the air atmosphere. Particle size, morphology, crystal phase and crystallinity of as-prepared powders were characterized by SEM and XRD. The effect of starting precursor solution on the formation of nanoparticles was investigated. The use of Ba/Ti aqueous solution derived from malic acid led to formation of cubic BaTiO3 nanoparticles with 50 nm size.

Sintering and Dielectric Properties of BaTiO3 Nano-Particle Prepared by Aerosol Plasma Pyrolysis Process

2007 ◽  
pp. 35-38
Author(s):  
Takayuki Kodera ◽  
Takashi Ogihara ◽  
Nobuo Ogata ◽  
Koji Nakane ◽  
Ryo Yoshida ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Nano Particle ◽  
Pyrolysis Process ◽  
Plasma Pyrolysis

Synthesis and Characterization of BaTiO3 Nano-Particle by Aerosol Plasma Pyrolysis Process

2006 ◽  
pp. 135-138
Author(s):  
Takayuki Kodera ◽  
Hajime Horikawa ◽  
Takashi Ogihara ◽  
Nobuo Ogata ◽  
Koji Nakane ◽  
...  
Keyword(s):  
Synthesis And Characterization ◽  
Nano Particle ◽  
Pyrolysis Process ◽  
Plasma Pyrolysis

Sintering Behavior and Dielectric Properties of BZN Ceramics Coated by Precursor Solution of CuSO4

2012 ◽  
Vol 476-478 ◽  
pp. 1058-1061
Author(s):  
Qian Li ◽  
Biao Jin ◽  
Jin Liang Huang ◽  
Yong Jun Gu ◽  
Li Hua Li ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Ceramic Composite ◽  
Sintering Temperature ◽  
Negative Impact ◽  
Precursor Solution ◽  
Sintering Behavior ◽  
Coating Technology ◽  
Sintering Aid ◽  
Phase Structures ◽  
Ceramic Samples

(Bi1.5Zn0.5)(Zn0.5Nb1.5)O7 (BZN) ceramic samples were prepared by solid state reaction, In order to reduce the sintering temperature of BZN ceramic we have used liquid coating technology to dope CuO by precursor solution of CuSO4. The sintering behavior, microstructures, phase structures, and dielectric properties were studied. The process reduces the amount of sintering aid and minimized the negative impact of sintering aid on dielectric properties. A ceramic composite which could be sintered well at 900°C and showed good dielectric properties of εr=161,tanδ=0.005 and TCF=-398ppm/°C（1MHz）was obtained when 0.5mol/l CuSO4 was added to the (Bi1.5Zn0.5)(Zn0.5Nb1.5)O7 ceramic.

scholarly journals Influence of Li2Co3 and V2O5 combined additions on the sintering and dielectric properties of Ca0.5Sr0.5TiO3 ceramics prepared from powders synthesized by sol-gel method

2014 ◽  
Vol 8 (2) ◽  
pp. 101-108
Author(s):  
Nouara Lamrani ◽  
Ahcène Chaouchi ◽  
Jerôme Bernard ◽  
Brahim Itaalit ◽  
David Houivet ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Sintering Temperature ◽  
Sol Gel ◽  
Lithium Carbonate ◽  
Ceramic Materials ◽  
Type I ◽  
Titanium Butoxide ◽  
Gel Method ◽  
Sol Gel Method ◽  
Air Atmosphere

In this work, we have studied the influence of lithium carbonate (Li2CO3) associated with the vanadium oxide (V2O5) on sintering and dielectrics properties of Ca0.5Sr0.5TiO3 ceramic materials obtained from nanopowder synthesized by sol-gel method. The nanopowder was obtained by controlled mixing of titanium butoxide dissolved in butanol-2 and acetic acid with a saturated aqueous solution of calcium acetate and strontium carbonate and subsequent drying of the formed gel at 80 ?C and calcination at 1100?C. The synthesized nanopowder was mixed with different amount of additives, and then uniaxally pressed and sintered in air atmosphere at temperature determined by dilatomertic measurements. The pure Ca0.5Sr0.5TiO3 sample obtained by this process required a sintering temperature around 1500?C. The addition of Li2CO3 combined with V2O5 improved sinterability and caused a shift of dilatimeric shrinkage curve to much lower temperatures. Thus, dense ceramics (98% of theoretical density) were obtained at sintering temperature ? 1300?C. The effect of adding Li2CO3-V2O5 on the structure of ceramics and the dielectric properties is discussed and show that type I dielectric properties (linear variation of the permittivity) are conserved, but with an increase of dielectric loss.

scholarly journals Phase, microstructure and microwave dielectric properties of A-site deficient (La, Nd)2/3TiO3 perovskite ceramics

2015 ◽  
Vol 33 (1) ◽  
pp. 126-130 ◽  
Author(s):  
Muhammad Saleem ◽  
Yaseen Iqbal ◽  
Shan Qin ◽  
Xiang Wu ◽  
Feng Zhu
Keyword(s):  
Dielectric Properties ◽  
Sintering Temperature ◽  
Microwave Dielectric Properties ◽  
Secondary Phase ◽  
Network Analyzer ◽  
Air Atmosphere ◽  
Microwave Dielectric ◽  
Perovskite Ceramics ◽  
Xrd Patterns ◽  
A Site

Abstract(La, Nd)2/3TiO3 ceramics were prepared through a conventional solid state mixed oxide route. For phase and microstructure analysis, XRD and SEM were used, respectively. Microwave dielectric properties were measured using a network analyzer. XRD patterns revealed the formation of the parent (La, Nd)2/3TiO3 phase along with (La, Nd)4Ti9O24 as a secondary phase. The microstructure consisted of rectangular and needle shaped grains, which decreased in size from 4 μm to 2 μm with an increase in sintering temperature from 1300 °C to 1350 °C. Decrease in grain size caused an increase in density of the samples from 4.81 g/cm3 to 5.17 g/cm3. Microwave dielectric properties of the samples calcined and sintered in air atmosphere were εr = 40.35, Q × f = 3499 GHz and τf = 0 ppm/°C, whereas for a sample calcined in nitrogen and sintered in air they were εr = 40.18, Q × f = 4077 GHz and τf = +4.9 ppm/°C, respectively.

Sintering and Dielectric Properties of SrTiO3-based Ceramics

2012 ◽  
Vol 1397 ◽  
Author(s):  
Juan Li ◽  
Dengren Jin ◽  
Lixin Zhou ◽  
Jinrong Cheng
Keyword(s):  
Dielectric Constant ◽  
Dielectric Properties ◽  
Room Temperature ◽  
Sintering Temperature ◽  
Precursor Solution ◽  
Particle Sizes ◽  
Low Dielectric ◽  
Different Temperatures ◽  
High Dielectric ◽  
Room Temperature Dielectric Constant

ABSTRACTHigh dielectric tunability, low dielectric loss tangent and appropriate level of dielectric constant are the basic requirements for applications as electrically tunable dielectric microwave devices. In our experiments, the SrTiO3 green compacts made of the powder mixtures with various particle sizes were infiltrated with a BaTiO3 precursor solution and sintered at different temperatures between 1280 and 1350 ºC for 2 hours and 1350 ºC for 6 hours. The sintering, microstructural and dielectric properties were investigated. Results showed that the relative density of SrTiO3 ceramics could reached 93% when sintered at 1280 ºC for 2 hours. When sintered for 6 hours at 1350 °C, the room temperature dielectric constant of SrTiO3 reaches 900 at a frequency of 1MHz. It has only weak temperature dependence between 100 and 500K. The reason of the low sintering temperature for the dense SrTiO3 ceramics and the effects of sintering scheme on the dielectric properties from 100 K to 500 K are discussed in this paper.

scholarly journals Microwave Sintering and Microwave Dielectric Properties of (1–x)Ca0.61La0.26TiO3-xNd(Mg0.5Ti0.5)O3 Ceramics

Materials ◽  
2021 ◽  
Vol 14 (2) ◽  
pp. 438
Author(s):  
Shuwei Yang ◽  
Bingliang Liang ◽  
Changhong Liu ◽  
Jin Liu ◽  
Caisheng Fang ◽  
...  
Keyword(s):  
Dielectric Properties ◽  
Mobile Communications ◽  
Sintering Temperature ◽  
Microwave Sintering ◽  
Microwave Dielectric Properties ◽  
Conventional Heating ◽  
Sintering Process ◽  
Microwave Dielectric ◽  
Sintering Time ◽  
Frequency Temperature

The (1–x)Ca0.61La0.26TiO3-xNd(Mg0.5Ti0.5)O3 [(1–x)CLT-xNMT, x = 0.35~0.60] ceramics were prepared via microwave sintering. The effects of sintering temperature and composition on the phase formation, microstructure, and microwave dielectric properties were investigated. The results show that the microwave sintering process requires a lower sintering temperature and shorter sintering time of (1–x)CLT-xNMT ceramics than conventional heating methods. All of the (1–x)CLT-xNMT ceramics possess a single perovskite structure. With the increase of x, the dielectric constant (ε) shows a downward trend; the quality factor (Qf) drops first and then rises significantly; the resonance frequency temperature coefficient (τf) keeps decreasing. With excellent microwave dielectric properties (ε = 51.3, Qf = 13,852 GHz, τf = −1.9 × 10−6/°C), the 0.65CLT-0.35NMT ceramic can be applied to the field of mobile communications.

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