ANALISIS STRUKTUR KRISTAL BARIUM HEKSAFERRIT TIPE-W (Ba,Sr)CoTiFe16O27

Abstract

W-type Barium Hexaferrite (BaMe₂Fe₁₂O₂₇) has high value of currie temperature, very small coercivity (H_c), and the highest magnetic saturation (M_s) than the other ferrite materials. The W-type Barium Hexaferrite has a crystal structure that built up as a superposition of S and R blocks. Appearance of divalent and trivalent cations that distributed among various sublattices makes W-type Barium Hexaferrite become very interesting for basic studies and different applications. Synthesis and characterization of materials W-type Barium Hexaferrite by modify the value of Ba and Sr in Ba_1-xSr_xCoTiFe₁₆O₂₇ with composition x=0 and x=0.1 to determine the characteristics of the phases/crystals that formed, conducted through the process of smoothing powders of basic materials BaCO₃, Fe₂O₃, SrCO₃, Co₃O₄ and TiO₂ by the High Energy Ball Mill for 1 hour in a wet condition (toluene). Phase forming in sintering 1100°C for 3 hours. By crystallographic analysis with measurements of X-Ray Diffractometer (XRD) on a target of Cobalt anode or anode Co, obtained phase analysis by qualitative and quantitative. From this result obtained magnetic materials BaCoTiFe₁₆O₂₇ and Ba_0.9Sr_0.1CoTiFe₁₆O₂₇. Lattice parameter values for BaCoTiFe₁₆O₂₇ and Ba_0.9Sr_0.1CoTiFe₁₆O₂₇ are a=b=5.89 Ã…, c= 23.24 Ã… dan a=b=5.89 Ã…, c= 23.23 Ã…. BaCoTiFe₁₆O₂₇ has a higher cell volume than Ba_0.9S_0.1CoTiFe₁₆O_27. Changes in cell volume affects the value of unisotropi crystal.

Keywords: W-type Barium Hexaferrite, High Energy Ball Mill, X-Ray Diffractometer (XRD), Crystal Phase.