Synthesis of Mg_1–xK_xB₂ from MgB₂ and KCl powders

Authors

Altero B. Bernardo ⋅ PH Materials Science and Engineering Program, University of the Philippines Diliman
Pauline P. Tipones ⋅ PH Materials Science and Engineering Program, University of the Philippines Diliman
Roland V. Sarmago ⋅ PH National Institute of Physics, University of the Philippines Diliman
Margie P. Olbinado ⋅ PH National Institute of Physics, University of the Philippines Diliman

Abstract

Mg_1–xK_xB₂ compound was synthesized from MgB₂ and KCl powders. Samples of Mg_1–xK_xB₂ at x=0.1 and x=0.15, were prepared under varying sintering temperatures. Samples are fine-grained and porous. Partial melting, and fused grains are evident at all sintering temperatures. Larger, more defined grain structure is seen for sample prepared at 830°C. A 0.6% increase in lattice parameter a and a 14% increase in lattice parameter c was observed for Mg_0.9K_0.1B₂, indicating successful K⁺ doping. Highest T_c was 37K for the Mg_0.9K_0.1B₂ sample sintered at 800°C. Lower T_c was obtained with increase in doping. For Mg_0.85K_0.15B₂ T_c averaged at 30K.

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Issue

2002: Proceedings of the 20th Samahang Pisika ng Pilipinas Physics Congress

Article ID

SPP-2002-3C-01

Section

Condensed Matter and Plasma Physics

Published

2002-10-23

How to Cite

[1]

AB Bernardo, PP Tipones, RV Sarmago, and MP Olbinado, Synthesis of Mg1–xKxB2 from MgB2 and KCl powders, Proceedings of the Samahang Pisika ng Pilipinas 20, SPP-2002-3C-01 (2002). URL: https://proceedings.spp-online.org/article/view/SPP-2002-3C-01.