Dielectric and X-Ray Studies of KNO₃-Series Mixed Crystals

Experimental studies for stability of ferroelectric phase in potassium nitrate composite films

“…The diffraction peaks of KNO 3 at 2θ = 29.85°of (003) reflection for ferroelectric phase III and 2θ = 29.2° of (012) reflection for phase II have already been reported in literature [30, 31]. These reflections have also been observed in the X‐ray diffraction scan of the 50 wt% composite film as shown in Fig.…”

Ferroelectric Phase Stability Studies in Spray Deposited KNO3:PVA Composite Films

“…The composite films exhibit the ferroelectric phase III peak at 2θ=29.71° corresponding to (003) reflection and another peak at 2θ=29.52° for (012) reflection for the phase II in addition to the peak around 2θ=19.6° that corresponds to PVA 44 . The earlier X‐ray studies by other workers also suggest the existence of ferroelectric peak around 2θ=29.8° in addition to peak corresponding to phase II around 2θ=29.5° in mixed KNO 3 systems 22,26,43,45 . The composites films of the KNO 3 :PVDF are also known to exhibit enhanced phase III peak at 2θ=29.8° 26 .…”

Ferromagnetism in Mechanically Milled KNO₃

“…The (012) XRD peaks of KNO 3 with the orthorhombic type structure [23] are shown in Fig.1, where the (012)-peak was broadened at high rotation speed of 500 rpm, which means the decreasing d of the crystallographic correlation length or particle diameter. The mean crystallographic correlation length or particle diameter d of KNO 3 phase was estimated from the half widths of XRD peaks by Sherrer's formula.…”

“…At room temperature, KNO 3 is in the phase II which has the orthorhombic aragonite structure [21][22][23]. The phase II changes at about 130 o C on the heating process into the phase I with the trigonal structure.…”