The present work is an attempt towards understanding the effect of sintering parameters on the various morphological, electrical and piezoelectric properties of (K 0.48 Na 0.48 Li 0.04 ) (Nb 0.96 Sb 0.04 ) O 3 (KNLNS) ceramics. We first synthesized the powder composition from various raw materials by using a conventional solid-state reaction method followed by high-energy ball milling. The powder sample was then sintered under various sintering conditions with temperatures ranging from 1050°C to 1090°C and durations from 2 h to 3 h. The ceramic samples so obtained were then characterized for various properties. The density was found to increase significantly within a narrow temperature range, but tended to decrease when the sintering temperature slightly exceeded the optimal one. Also, by merely reducing the duration of sintering from 3 h to 2 h while keeping the temperature constant, we observed an enhancement in the density of the ceramics by about 10% ~ 20%. The room-temperature dielectric constant ( εRT ), the electromechanical coupling factor ( k p ) and the piezoelectric charge constant ( d 33 ) were found to vary with the sintering parameters. The study reveals the necessity for striking a strict balance between the sintering temperature and the sintering period in order to improve the microstructural, dielectric and piezoelectric properties of such a ceramic composition containing highly-volatile alkaline members.