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Hydrothermal crystallization of bari...

Chun, Chang-Min.

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Hydrothermal crystallization of barium titanate: Mechanisms of nucleation and growth.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Hydrothermal crystallization of barium titanate: Mechanisms of nucleation and growth./
作者:	Chun, Chang-Min.
面頁冊數:	166 p.
附註:	Source: Dissertation Abstracts International, Volume: 58-03, Section: B, page: 1471.
Contained By:	Dissertation Abstracts International58-03B.
標題:	Engineering, Materials Science. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9725373
ISBN:	0591342650

Hydrothermal crystallization of barium titanate: Mechanisms of nucleation and growth.
Chun, Chang-Min.

Hydrothermal crystallization of barium titanate: Mechanisms of nucleation and growth. - 166 p.

Source: Dissertation Abstracts International, Volume: 58-03, Section: B, page: 1471.

Thesis (Ph.D.)--Princeton University, 1997.

Barium titanate is synthesized under hydrothermal conditions by the reaction of a variety of titania precursors with aqueous solutions of Ba(OH)

ISBN: 0591342650Subjects--Topical Terms:

1017759
Engineering, Materials Science.

Hydrothermal crystallization of barium titanate: Mechanisms of nucleation and growth.
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245 1 0 $a Hydrothermal crystallization of barium titanate: Mechanisms of nucleation and growth.
300 $a 166 p.
500 $a Source: Dissertation Abstracts International, Volume: 58-03, Section: B, page: 1471.
500 $a Adviser: Ilhan A. Aksay.
502 $a Thesis (Ph.D.)--Princeton University, 1997.
520 $a Barium titanate is synthesized under hydrothermal conditions by the reaction of a variety of titania precursors with aqueous solutions of Ba(OH) $\ sb2 $ at 80 $\ sp\circ $\ sb2 $ are micro-sized and highly aggregated, but increasing concentrations cause the particle size to decrease, resulting in nanometer-sized and fairly monodispersed particles. The change in particle size and morphology at various Ba(OH) $\ sb2 $ concentrations is controlled by the dissolution of titania and precipitation of BaTiO $\ sb3 $. In order to explain the origin of "raspberry-like" BaTiO $\ sb3 $ particles and the generation of hierarchically ordered BaTiO $\ sb3 $ aggregate comprised of primary, crystalline particles, which exhibit an unusually high degree of crystallographic alignment, the role of colloidal stability and therefore controlled aggregation of precipitated primary particles is taken into account. Formation of SrTiO $\ sb3 $ on BaTiO $\ sb3 $ particles reveal that two different morphologies for the growing SrTiO $\ sb3 $ exists and that the form taken by SrTiO $\ sb3 $ depends on the degree of supersaturation. In concentrated solutions, homogeneous nucleation and aggregation growth occur. In dilute solutions, heterogeneous nucleation and continuous growth of SrTiO $\ sb3 $ promote epitaxial growth. BaTiO $\ sb3 $ particles prepared by the alkoxide (Ti(OC $\ sb3 $\ sb7)\sb4 $) -hydroxide (Ba(OH) $\ sb2 $) route under hydrothermal conditions show that secondary processed such as aggregation and recrystallization are important to control the particle size and morphology. Particle clustering, and rearrangement of nanometer-sized BaTiO $\ sb3 $ particles, and particulate uniformity can then be explained in terms of solution reactions and colloidal behavior.
590 $a School code: 0181.
650 4 $a Engineering, Materials Science. $3 1017759
650 4 $a Chemistry, Inorganic. $3 517253
650 4 $a Mineralogy. $3 516743
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710 2 0 $a Princeton University. $3 645579
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790 $a 0181
791 $a Ph.D.
792 $a 1997
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=9725373