NDLI: Synthesis and sintering improvement of Aurivillius type structure ferroelectric ceramics by mechanochemical activation

Content Provider	Royal Society of Chemistry (RSC)
Author	Castro, Alicia Jiménez, Basilio Pardo, Lorena Millán, Pilar
Copyright Year	1999
Abstract	An oxide mixture of composition 3Bi 2 O 3 :Nb 2 O 5 :2TiO 2 has been mechanochemically activated in a laboratory mill for different times from 3 to 336 h. The as-milled powder and an unmilled mixture of identical composition were annealed at different temperatures up to the formation of the Aurivillius-type oxide Bi 3 NbTiO 9 , and examined by X-ray diffraction (XRD) and differential thermal analysis (DTA). The sample milled for 336 h shows complete amorphization. Its DTA curve exhibits two exothermic process at 370 and 560 °C, corresponding to the formation of a metastable fluorite phase and the Aurivillius-type oxide, respectively. The crystallization temperature of this Aurivillius phase from the unmilled oxide mixture is reported to be 1050 °C, whereas from the amorphous powder obtained by 336 h of mechanochemical activation this temperature becomes as low as 600 °C. Ceramics of this composition must be prepared by hot-pressing in order to obtain low porosities, owing to the lamellar morphology of the conventionally crystallized powder, which gives rise to textured anisotropic materials. Non-textured ceramics were obtained both from the conventionally crystallized and the amorphous powder by natural sintering at 1100 °C. Ceramics obtained from amorphous powder show lower porosity and higher electromechanical coupling factors.
Starting Page	1313
Ending Page	1317
Page Count	5
File Format	PDF
ISSN	09599428
Volume Number	9
Issue Number	6
Journal	Journal of Materials Chemistry
DOI	10.1039/a902492a
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	DTA Watermill X-ray crystallography Differential thermal analysis Exothermic process Metastability Fluorite Sintering Porosity
Content Type	Text
Resource Type	Article
Subject	Chemistry Materials Chemistry

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

Sol–gel synthesis of strontium titanate powders of various compositions

Synthesis of barium-zinc-titanate ceramics

Preparation, characterization and surface structure of coprecipitated high-area Sr_x TiO_{2 +x}(0 x 1) powders

Preparation of whisker penetrated ceramics by internal precipitation of hollandite within a tielite matrix

Diffusion of transition metals (Co,Ni) and its effects on sol–gel derived ZrO₂ polymorphic stabilities

Hydrothermal synthesis and characterization of K₃Sb₃P₂O₁₄·5H₂O

Phase formation on the surface of lead ferroniobate depending on the conditions of mechanochemical synthesis and sintering

Synthesis of layered–layered 0.5Li₂MnO₃·0.5LiCoO₂ nanocomposite electrode materials by the mechanochemical process and first principles study

Doping effect on the physical properties of bi-layered aurivillius-type structure SrBi2Nb2O9 ferroelectric ceramics: SrBi2Nb2O9 (SBN) aurivillius-type ferroelectric ceramics

Synthesis and sintering improvement of Aurivillius type structure ferroelectric ceramics by mechanochemical activation

Similar Documents

Sol–gel synthesis of strontium titanate powders of various compositions

Synthesis of barium-zinc-titanate ceramics

Preparation, characterization and surface structure of coprecipitated high-area Srx TiO2 +x(0 x 1) powders

Preparation of whisker penetrated ceramics by internal precipitation of hollandite within a tielite matrix

Diffusion of transition metals (Co,Ni) and its effects on sol–gel derived ZrO2 polymorphic stabilities

Hydrothermal synthesis and characterization of K3Sb3P2O14·5H2O

Phase formation on the surface of lead ferroniobate depending on the conditions of mechanochemical synthesis and sintering

Synthesis of layered–layered 0.5Li2MnO3·0.5LiCoO2 nanocomposite electrode materials by the mechanochemical process and first principles study

Doping effect on the physical properties of bi-layered aurivillius-type structure SrBi2Nb2O9 ferroelectric ceramics: SrBi2Nb2O9 (SBN) aurivillius-type ferroelectric ceramics

Synthesis and sintering improvement of Aurivillius type structure ferroelectric ceramics by mechanochemical activation

Preparation, characterization and surface structure of coprecipitated high-area Sr_x TiO_{2 +x}(0 x 1) powders

Diffusion of transition metals (Co,Ni) and its effects on sol–gel derived ZrO₂ polymorphic stabilities

Hydrothermal synthesis and characterization of K₃Sb₃P₂O₁₄·5H₂O

Synthesis of layered–layered 0.5Li₂MnO₃·0.5LiCoO₂ nanocomposite electrode materials by the mechanochemical process and first principles study