Effect of processing parameters on the development of anisotropic α-Al2O3 platelets during molten salt synthesis

Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) solid solutions with composition near the morphotropic phase boundary (MPB) (33mol% PT) were successfully synthesized by the molten salt synthesis (MSS) method at 800°C for 30min using Li2SO4-Na2SO4 and NaCl-KCl molten salts as a medium of reaction, respectively. The influences of processing parameters, such as temperature, time, and type of salts, on the formation and the micrographs characteristics of the PMN-PT powders were discussion. It was found that the PMN-PT powder obtained by the MSS method has a relatively uniform size distribution and a better dispersivity of particle, and an average size of PMN-PT particles with smooth surface was around 0.3∼0.5 μm. With other conditions being kept same, chloride molten salt is more propitious to the formation of PMN- PT solid solutions, and improving the compositional homogeneity of PMN-PT powders.

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Morphology control of α-Al2O3 platelets by molten salt synthesis

Ceramics International ◽

10.1016/j.ceramint.2010.09.021 ◽

2011 ◽

Vol 37 (1) ◽

pp. 249-255 ◽

Cited By ~ 26

Author(s):

Zhu Li-hui ◽

Huang Qing-wei

Keyword(s):

Molten Salt ◽

Morphology Control ◽

Molten Salt Synthesis ◽

Α Al2o3

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WITHDRAWN: The effects of processing parameters on molten salt synthesis of CaZrO3 nano powders using oxide precursors

Ceramics International ◽

10.1016/j.ceramint.2013.01.111 ◽

2013 ◽

Author(s):

Rahman Fazli ◽

Mehdi Fazli

Keyword(s):

Molten Salt ◽

Processing Parameters ◽

Molten Salt Synthesis

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SYNTHESIS OF ANISOTROPIC LEAD TITANATE POWDERS FOR TEMPLATED GRAIN GROWTH OF TEXTURED PIEZOELECTRIC CERAMICS

Surface Review and Letters ◽

10.1142/s0218625x10013631 ◽

2010 ◽

Vol 17 (02) ◽

pp. 159-164 ◽

Cited By ~ 5

Author(s):

S. MA ◽

J. Y. H. FUH ◽

Y. F. ZHANG ◽

L. LU

Keyword(s):

Molten Salt ◽

Heating Temperature ◽

Synthesis Method ◽

Processing Parameters ◽

Molten Salt Synthesis ◽

X Ray Diffraction ◽

Thermal Synthesis ◽

Flux Synthesis ◽

One Step ◽

Molten Salt System

Needle-shaped PbTiO3 (PT) template particles were successfully synthesized using two different types of approaches, molten salt synthesis (MSS) and thermal synthesis method. In eutectic NaCl–KCl molten salt system, homogeneous and nonagglomerated needle-shaped PT particles were produced from PbO and needle-like TiO2 compound heated at 800–850°C for 2 h. The effect of heating temperature on the morphology of formed powders was studied in order to identify the optimum processing parameters. The template formation mechanism is discussed. Using thermal synthesis method, comparable needle-shaped PT crystalline particles were also obtained in one step. Plate-shaped PT powders were derived via flux synthesis. The effect of additives such as MnCl2 and LiF on the morphology of derived PT was studied. Adding a certain amount of MnCl2 led to the formation of well-defined plate-shaped PT particles. The structure and morphology of synthesized powders were characterized by means of X-ray diffraction (XRD) and field emission scanning electron microscopy (FE-SEM).

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