Enhancing the superconducting performance of melt grown bulk YBa2Cu3Oy via ultrasonically refined Y2BaCuO5 without PtO2 and CeO2

Effect of boron precursor ultra-sonicated in hexane medium on the critical current density of sintered bulk MgB2

“…Manipulation with grain boundaries is the easiest and straightforward way to enhance flux pinning. Among other methods, the simplest and cheapest way is high energy ultra-sonication that we have employed recently [15,16]. This technique uses ultrasonic waves generated by metal probe in a solution and causes i) particle-particle collisions, ii) particle-wall collisions and iii) destructive forces generated by collapse of tiny air bubbles, thereby refining the particles.…”

Fabrication of high-performance YBa2Cu3Oy melt-textured bulks with selective grain growth

“…Many successful efforts have been devoted to enhance J c through RE-mixing, refinement of RE 2 BaCuO 5 (RE211) particles, introduction of pinning sites, and/or other methods. [10][11][12][13][14][15][16][17] However, it is difficult to fabricate REBCO melt-textured bulks with homogenous B T distribution. To achieve the biaxial oriented growth of REBCO, texturization using a seed crystal, such as in topseeded melt growth (TSMG) or top-seeded infiltration growth (TSIG) methods, has been adopted, resulting in generations of a-growth and c-growth regions, i.e.…”