Journal ArticleDOI
Nanometer-Sized ZrO2 Particles Prepared by a Sol–Emulsion–Gel Method
TLDR
ZrO{sub 2} powder was prepared by a sol-emulsion-gel method at temperatures below 140{degrees}C from ZrO(NO{sub 3} ){center dot} nH{ sub 2}O. The asprepared powder was amorphous, but crystallized into the tetragonal structure by 600Abstract:
ZrO{sub 2} powder was prepared by a sol-emulsion-gel method at temperatures below 140{degrees}C from ZrO(NO{sub 3}){sub 2} {center dot} nH{sub 2}O. The asprepared powder was amorphous, but crystallized into the tetragonal structure by 600{degrees}C. The metastable tetragonal powder (600{degrees}C) was comprised of ultrafine 4- to 6-nm size particles. On heat treatment, the tetragonal form completely transformed into the monoclinic state at 1100{degrees}C. Preliminary studies indicate good sinterability with densities greater than 94% at 1100{degrees}C and with a grain size of 0.25 {mu}m.read more
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Aerosol Processing of Materials
TL;DR: A review of recent advances in aerosol generation of materials is presented in this article, where gas-to-particle and spray processes (spray pyrolysis) for powder generation and various routes for film generation are discussed from the experimental and theoretical perspectives.
Journal ArticleDOI
Characterization of Cerium(IV) Oxide Ultrafine Particles Prepared Using Reversed Micelles
Toshiyuki Masui,Kazuyasu Fujiwara,and Ken-ichi Machida,Gin-ya Adachi,Takao Sakata and,Hirotaro Mori +5 more
TL;DR: In this paper, high-resolution electron microscope (HREM) observations revealed that nanometer-sized cerium(IV) oxide ultrafine particles were formed using a reaction within reversed micelles, which was known as a microemulsion method.
Journal ArticleDOI
Molten salt synthesis of lead-based relaxors
TL;DR: In this article, two relaxor materials, Pb(Mg 1/3Nb2/3)O3 and Pb (Fe 1/2Nb1/2), were successfully synthesized at a low temperature in a very short time by the MSS method.
Journal ArticleDOI
Stabilization of Tetragonal ZrO2 in ZrO2–SiO2 Binary Oxides
TL;DR: In this paper, it was found that the transformation temperature increases as the SiO 2 content in the ZrO 2 -SiO 2 binary oxide increases, and the most significant results were from samples containing only 2 mol% SiO2, where the metastable tetragonal phase formed at low temperatures and remained stable over a broad temperature range.
Journal ArticleDOI
An improvement in processing of hydroxyapatite ceramics
TL;DR: In this paper, the effect of powder agglomeration on densification during both the initial and later stage of sintering is discussed, and the attainable sintered density of the conventionally processed material was found to be limited by the presence of hard powder aggregates, which were not effectively eliminated by the application of a pressing pressure of 200 MPa.
References
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Journal ArticleDOI
Formation of Ultrafine Tetragonal ZrO2 Powder Under Hydrothermal Conditions
TL;DR: In this article, a tetragonal ZrO2 powder was prepared by hydrothermal treatment at 100 MPa of amorphous hydrous zirconia with distilled water and LiCl and KBr solutions.
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Emulsions and Solubilization
Kozo Shinoda,Stig Friberg +1 more
TL;DR: In this article, the effect of temperature on systems containing nonionic surfactants and studies of the surfactant as a function of temperature are presented. And the authors demonstrate how the HLB solution properties can be controlled to change from water soluble to oil-soluble, which is useful for demonstrating the relation between the function of Hydrophilic Lipophilic Balance and solubilization, microemulsions and emulsion stability or inversion.
Journal ArticleDOI
Powder synthesis from metal-organic precursors.
TL;DR: The high surface activity associated with these powders make it possible relatively low temperature processing of the powders compact to near theoretical density and uniform fine grain size bodies as mentioned in this paper, and transmission electron microscopy is used to show nucleation, growth crystallite morphology of the synthesized powders, and microstructural features observed.