Synthesis And Characterization Of Mo, Se And Their Co-Doped Barium Strontium Titanate Dielectric Materials For Capacitor Application

Abstract

Barium Strontium Titanate (Bst) Is A Suitable Dielectric Material For A Capacitor Application. In This Work, Bst Was Doped With Mo, Se And Their Composites Through Slow Rate Injection Sol-Gel Methodto Study Their Effect On The Capacitive Application Of Bst. The Existence Of Atoms And Ions Of The Bst Samples Were Confirmed By The Energy Dispersive Spectroscopy (Eds) And X-Ray Photoelectron Spectroscopy (Xps). The Xrd Confirmed The Formation Of The Tetragonal Shaped Ba0.77sr0.23tio3 (Bst-0.7) And Cubic Shaped Ba0.6sr0.4tio3 (Bst-0.6) Samples. The Insertion Of Mo To Ba0.77sr0.23tio3 Resulted In Lowering Of The Average Crystal Size From 23.97 Nm To 14.46 Nm And Average Grain Size From 40.13 Nm To 23.35 Nm Of Bst Where 0.04 Mol Mo-Doped Bst-0.7 Possessed An Average Particle Size Of 24.60 Nm. The 0.06 Mol Mo-Doped Bst-0.6 Possessed A Lower Crystal Size Of 15.17 Nm As Compared To That Of Bst-0.6 (19.35 Nm). Likewise, The Average Grain Size Of Bst-0.6 Decreased From 26.02 Nm To 16.40 Nm When 0.06 Mol Mo6+Was Added To Bst-0.6. 0.04 Mol Mo-Doped Bst-0.6 With Composed Of Particles With An Average Particle Size Of 20.92 Nm. Meanwhile, The 0.06 Mol Se Dopant Caused Reduction Of Average Crystal Size From 23.97 Nm To 18.89 Nm For Bst-0.6 As Well As Elevation Of Average Crystal Size From 19.41 Nm To 30.03 Nm For Bst-0.7 Accompanied By The Respective Decreasing From 40.13 Nm To 12.43 Nm And Increasing From 26.02 Nm To 35.45 Nm Of The Average Grain Size Of The Bst-0.7 Samples. The 0.04 Mol Se-Doped Bst-0.6 And 0.04 Mol Se-Doped Bst-0.7 Acquired Average Particle Sizes Of 27.08 Nm And 28.34 Nm, Respectively. The Composite Dopant Of 0.06 Mol Mo And 0.06 Mol Se Have Shown Higher Average Crystal Size, From 23.97 Nm To 28.36 Nm, As Well As Elevated Average Grain Size From 40.13 Nm To 62.51 Nm Of Bst-0.6. The 0.04 Mol (Mo, Se) Co-Doped Bst-0.6 Nano Powder Was Found With An Average Particle Size Of 20.22 Nm. The Dopants Generated More Space Polarization And Oxygen Vacancies. At The Same Time, They Neutralized Extra Electrons. Such Changes Ultimately Led To The Enhancement Of Capacitive Application Of Bst-0.6 By Increasing The Dielectric Constant ( ) From 233.80 To A Maximum Of 980.60 For The Mo-Doped Bst-0.6 Calcined At 900 Oc, From 248.80 To 1101.40 For The Se-Doped Bst-0.6 Calcined At 800 Oc And From 248.80 To 1200.20 For The (Mo, Se)Co-Doped Bst-0.6 Calcined At 800 Oc, At A Frequency Of 1 Mhz. The Doping Of Mo And Se Resulted In The Lowering Of Dielectric Loss Of Bst-0.6 Calcined At 900 Oc From 0.15576 To 0.0243 (Mo-Doped Bst-0.6), 0.1614 To 0.0233 (Se-Doped Bst-0.6, Calcined At 800 Oc) And 0.1614 To 0.0182 For The (Mo, Se) Co-Doped Bst-0.6 Calcined At 800 Oc. The Mo, Se And Their Co-Doped Bst Were Effectively Synthesized Through A Sol-Gel Method And The Dopants Improved The Capacitive Application Of The Bst-0.6 Base Material.