Growth and Characterization of Functionally Graded Tryglycine Sulphate–Phosphoric Acid Substituted Tryglycine Sulphate Crystals Produced by Solution-Dropping Method

Abstract

Tryglycine sulphate (TGS) and (phosphoric acid)-substituted tryglycine sulphate (TGSP) crystals were fabricated on a TGS seed crystal by dropping TGS or TGSP solution. The Curie temperatures of the resultant TGS and TGS 0:5 P 0:5 crystals were 46 and 55 C, respectively. A compositionally graded TGSP crystal was also fabricated by dropping the concentration-controlled TGS-TGSP solution, and the composition of the functionally graded material (FGM)-TGSP crystal was changed continuously from TGS to TGS 0:5 P 0:5 with a composition ratio step of 0.05. The FGM-TGSP specimen showed a flat dielectric curve with a dielectric constant of 2450 AE 7% in the range from 46 to 54 C.