K2Ti6O13

K2Ti6O13 is an inorganic compound in the potassium titanate family, with the formula K2Ti6O13. It is formed from titanium oxide units coordinated by oxygen and potassium ions occupying interstitial sites within a titanate framework. The material is of interest as part of the broader class of hexatitanates and related titanates studied for their structural versatility and ion-organization properties.

Synthesis of K2Ti6O13 can be achieved by high-temperature solid-state reaction of titanium oxide sources with potassium compounds such as K2CO3, typically at elevated temperatures in the range of several hundred to over a thousand degrees Celsius. It can also be prepared by hydrothermal or molten-salt routes in potassium-containing media, which can influence particle morphology and crystallinity. The exact phase formation and purity depend on reaction conditions, stoichiometry, and the presence of competing titanate phases.

Structure and properties: The structure comprises TiO6 octahedra linked to form a titanate framework with interstitial sites that accommodate potassium ions. This framework provides channels or tunnels that can facilitate ion exchange and insertion processes. K2Ti6O13 is generally a poor electrical conductor and exhibits insulating behavior, with a wide bandgap characteristic of many titanates. It is chemically relatively stable, which supports its use in ceramic applications and in contexts where structural rigidity is beneficial.

Applications and research: K2Ti6O13 has been studied in the broader context of hexatitanates and related titanates for potential uses in ion-exchange materials, ceramic components, and energy-related research areas such as electrode materials and catalysis. The specific application potential often depends on synthesis routes, particle morphology, and phase purity.