NDLI: Microwave Dielectric Properties of Corundum-Structured (Mg4-xMx)(Nb2-yAy)O9 (M=Mn, Co, and Zn, A=Ta and Sb) Ceramics

Content Provider	IEEE Xplore Digital Library
Author	Kan, A. Ogawa, H.
Copyright Year	2007
Description	Author affiliation: Meijo Univ., Nagoya (Kan, A.; Ogawa, H.)
Abstract	The $(Mg_{4}$ $_{-x}M_{x})(Nb_{2-y}A_{y})O_{9}$ (M=Mn, Co, and Zn, A=Ta and Sb) compound with corundum structure were prepared and the microwave dielectric properties, crystal structure and covalency of cation-oxygen bonds of the compounds were investigated in this study. The global instability index (GII) of $(Mg_{4-x}M_{x})Nb_{2}O_{9}$ compounds was higher than that of $Mg_{4}(Nb_{2-y}A_{y})O_{9}$ compounds and the GIl values of $(Mg_{4-x}M_{x})Nb_{2}O_{9}$ compounds increased with increasing the composition x. From the calculation of cation-oxygen bonds, it was found covalency of M-O bond in the $(Mg_{4-x}M_{x})Nb_{2}O_{9}$ compounds decreased, depending on the composition. The dielectric constant of the compounds ranged from 11 to 16 by the M substitutions for Mg, whereas the quality factor (Q f) drastically decreased form 210000 to 5000 GHz. On the other hand, the A substitution for Nb enhanced the increase in the Q f value of the compounds; the highest value was 347000 GHz.
Starting Page	519
Ending Page	522
File Size	2852945
Page Count	4
File Format	PDF
ISBN	9781424413331
ISSN	10994734
DOI	10.1109/ISAF.2007.4393316
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2007-05-27
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Ceramics Zinc Resonant frequency Powders Microwave theory and techniques Land surface temperature Dielectric constant Q factor High-K gate dielectrics Dielectric materials
Content Type	Text
Resource Type	Article

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