Synthesis of boron nitride nanotubes employing mechanothermal process and its characterization

Abstract

Multi-walled boron nitride (BN) nanotubes having cylindrical structure were synthesized employing the mechanothermal process. In this process hexagonal boron nitride powder (hBN) was first ball milled for 50-100 h using a high-energy ball mill and the ball-milled samples were annealed in N 2 atmosphere for about 10 h in the temperature range of 950-1300°C. The BN nanotubes exhibited a well-crystallized hexagonal structure with about 25-40 nm in diameter and up to 1 lm length. These BN nanotubes were well characterized using various techniques, such as, XRD, SEM, TEM and Raman Spectroscopy.

Boron nitride nanotube reinforced hydroxyapatite composite: Mechanical and tribological performance and in-vitro biocompatibility to osteoblasts

“…The peak at ∼964 cm −1 , present in all spectra, is from the ν 1 symmetric stretching vibration of phosphate anions in HA . The peak at ∼1367 cm −1 , present in HA-BNNT powder and sintered pellet, is an E 2g mode peak from h-BN (Zhi et al, 2006b;Guo and Singh, 2008;Singhal et al, 2008). The presence of h-BN peak in Raman spectrum of the pellet along with the tubular structures in HRTEM images ( Fig.…”

Boron nitride (BN) nanofluids as cooling agent in thermal management system (TMS)

“…In the first step, successful surface modification of boron nitride powder into nanoparticles (80 nm) by ball-milling is achieved using planetary ball mill [16][17][18]. In the second step, BN nanoparticles are dispersed into deionized water to obtain BN nanofluids.…”

Synthesis of multiwall boron nitride nanotubes dependent on crystallographic structure of boron

“…have been explored, while synthesis and growth mechanism of BNNTs is not fully understood. As an initial boron powder for milling, crystalline boron [11,15], amorphous boron [12], mixture of boron and heBN [13], and heBN [14], etc. were used.…”