Metatitanic acid: Synthesis and properties

Sintering behavior, microstructure and microwave dielectric properties of Li2+xTiO3 (0≤x≤0.2)

“…Since a large number of modes were overlapped or interacted, it is very difficult to distinguish and assign all of these modes from the Raman spectra. According to Denisova et al's work [13], the band at 668 cm −1 is considered to be Ti-O stretching vibration. The Raman bands in the region of 360 and 225-303 cm −1 are associated with the Li-O stretching vibrations and O-Li-O bending vibrations.…”

Structural, electronic properties and chemical bonding in protonated lithium metallates Li2−x H x MO3 (M = Ti, Zr, Sn)

“…In Li 2 MO 3 (M = Ti, Zr) treatment with aqueous acid solutions, hydrogen ions can substitute for Li + [4][5][6]. Exchange proceeds with the formation of protonated forms Li 2−x H x MO 3 (0 < x ≤ 2); here the complete substitution for lithium ions is possible only for low-temperature phases of Li 2 MO 3 , obtained by annealing below 700°C.…”

Synthesis and characterisation of new MO(OH)2(M = Zr, Hf) oxyhydroxides and related Li2MO3salts

“…18 Denisova et al described a method of synthesis and some properties of metatitanic acid H 2 TiO 3 . 19 Yawata reported on recovering lithium ions from hot spring water using H 2 TiO 3 , obtained from Li 2 TiO 3 by an ion exchange reaction. 20 Recently, we showed that all three MO(OH) 2 (M = Ti, Zr, Hf ) oxyhydroxides can be synthesised in solid form by an ion exchange reaction in aqueous acetic acid solution from Li 2 MO 3 (M = Ti, Zr, Hf ) precursors.…”

“…20 Recently, we showed that all three MO(OH) 2 (M = Ti, Zr, Hf ) oxyhydroxides can be synthesised in solid form by an ion exchange reaction in aqueous acetic acid solution from Li 2 MO 3 (M = Ti, Zr, Hf ) precursors. 19,[21][22][23] It is worth mentioning that the precursors in ref. [19][20][21][22][23] have been obtained by standard solid-state synthesis at temperatures 600-700°C, 19,21 which are significantly lower than the temperatures used during the solid-state synthesis of the above-mentioned lithium salts.…”

“…19,[21][22][23] It is worth mentioning that the precursors in ref. [19][20][21][22][23] have been obtained by standard solid-state synthesis at temperatures 600-700°C, 19,21 which are significantly lower than the temperatures used during the solid-state synthesis of the above-mentioned lithium salts. [24][25][26][27][28][29][30] In the case of TiO(OH) 2 we showed that decreasing the synthesis temperature is crucial for obtaining oxyhydroxides.…”