In 2014, room-temperature densification (RTD) was demonstrated for Li2MoO4 and its composites [58]. Following RTD, another low-temperature densification technique called warm press (WP) was practiced [59]. Then finally, two techniques having different densification mechanisms referred as to cold sintering (CS) [60], and reactive hydrothermal liquid-phase densification (rHLPD) appeared concurrently [61].