An anticorrosive, conductive material includes a first oxide having oxygen vacancies and a formula (I): MgTi.sub.2O.sub.5- (I), where .sub. is any number between 0 and 3 optionally including a fractional part denoting the oxygen vacancies; and a second oxide having a formula (II): Ti.sub.aO.sub.b (II), where 1<=a<=20 and 1<=b<=30, optionally including a fractional part, the first and second oxides of formulas (I) and (II) forming a polycrystalline matrix.

A ceramic powder containing at least one of a nitride and a carbonitride of a metal element as a major component, the metal element being one or more elements selected from the group consisting of a group 4 element, a group 5 element and a group 6 element, the ceramic powder having particles having an average particle size of 5 m or less, and an oxygen content of 0.3% by mass or less.

A ceramic powder containing at least one of a nitride and a carbonitride of a metal element as a major component, the metal element being one or more elements selected from the group consisting of a group 4 element, a group 5 element and a group 6 element, the ceramic powder having particles having an average particle size of 5 m or less, and an oxygen content of 0.3% by mass or less.

There is provided a functional layer including a layered double hydroxide. The functional layer further contains titania.

There is provided a functional layer including a layered double hydroxide. The functional layer further contains titania.

A piezoelectric composition comprises a plurality of crystal particles, wherein the piezoelectric composition includes bismuth, iron, barium, titanium, and oxygen; the crystal particle include a core and a shell having a contents of bismuth higher than that in the core and covering the core; and the total area of the cross sections of the cores exposed to the cross section of the piezoelectric composition is expressed as S.sub.CORE, the total area of the cross sections of the shells exposed to the cross section of the piezoelectric composition is expressed as S.sub.SHELL, and 100.Math.S.sub.CORE/(S.sub.CORE+S.sub.SHELL) is 50 to 90.

An alkali metal titanate includes an alkali metal titanate phase and a composite oxide containing Al, Si and Na, wherein a percentage of a ratio of the number of moles of Na to a total number of moles of Na and alkali metal X other than Na, ((Na/(Na+X))100), is 50 to 100 mol %, and a percentage of a ratio of a total content of Si and Al to a content of Ti, (((Si+Al)/Ti)100), is 0.3 to 10 mass %. According to the disclosure, an alkali metal titanate having a small content of a compound having a shorter diameter d of 3 m or less, a longer diameter L of 5 m or more and an aspect ratio (L/d) of 3 or more can be provided.

According to one embodiment, an electrode is provided. The electrode includes an active material-containing layer which contains an active material. The active material includes a plurality of primary particles containing a niobium-titanium composite oxide. The average crystallite diameter of the plurality of primary particles is 90 nm or more. The average particle size (D50) of the plurality of primary particles is in a range of 0.1 m to 5 m. The average value (FU.sub.ave) of the roughness shape coefficient (FU) according to Formula (1) below is less than 0.70 in 100 primary particles among the plurality of primary particles. $\begin{array}{cc}\left[\mathrm{Formula}1\right]& \\ \mathrm{FU}=\frac{f}{f_c}=\frac{4a}{{}^2}& \left(1\right)\end{array}$

A ceramic dielectric including: a bulk dielectric including barium (Ba) and titanium (Ti); a ceramic nanosheet; and a composite dielectric of the bulk dielectric and the ceramic nanosheet.

A ceramic dielectric including: a bulk dielectric including barium (Ba) and titanium (Ti); a ceramic nanosheet; and a composite dielectric of the bulk dielectric and the ceramic nanosheet.