All submissions of the EM system will be redirected to Online Manuscript Submission System. Authors are requested to submit articles directly to Online Manuscript Submission System of respective journal.

Abstract

Tunable Sr4Ta2O9-B’2O3 [B’ = La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Y, Er and Yb] microwave dielectrics; A novel method of synthesis

Author(s): L. Abdul Khalam

The Sr4Ta2O9+ (x)B’2O3 ceramics, [B’ = La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Y, Er and Yb] for x = 0-15 have been synthesized by a different solid state ceramic route without any sintering aid. Sr(B’1/2Ta1/2)O3 perovskites were prepared by Sr4Ta2O9: B’2O3 = 1:1 method. The microwave dielectric properties of the ceramics were investigated and could be tuned by varying the B’2O3 content. The structure and microstructure of the ceramics have been characterized byX-ray diffraction and SEMtechniques. The dielectric properties of Sr(B’1/2Ta1/2)O3 ceramics depends on RE- ionic radii. Nearly zero ôf for Sr4Ta2O9+ (x)Sm2O3was obtained for x = 13. The Sr4Ta2O9+B’2O3 ceramics [B’ = La, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Y, Er and Yb] have år= 27.9- 33.2, Qu × f = 6200-56400 GHz and ôf = -71 to -35 ppm/oC.Aslight deviation from stoichiometry affects the dielectric properties of these ceramics.


Share this       

Share this Page.

Table of Contents

Flyer
izmir escort izmir escort bursa escort antalya escort izmir escort porno porno izle türk porno eskişehir escort bartın escort burdur escort havalandırma izmir escort bursa escort porno indir izle escort izmir