Dispersions of alumina hydrate

A dispersion of an alumina hydrate for the preparation of a recording medium, comprising an alumina hydrate and deionized water, the alumina hydrate containing 0.1 to 1.0% by weight of a nitrate anion and having an average pore radius of 20 to 200 Å and a half breadth of pore radius distribution of 20 to 150 Å, wherein when the alumina hydrate is dispersed in water at a solids concentration of 20% by weight to form a dispersion, the dispersion has a viscosity not higher than 100 cP as measured at 20° C. and a shear rate of 10.2 sec−1.

A dispersion of an alumina hydrate for the preparation of a recording medium, comprising an alumina hydrate and deionized water, the alumina hydrate containing 0.1 to 1.0% by weight of a nitrate anion and having an average pore radius of 20 to 200 Å and a half breadth of pore radius distribution of 20 to 150 Å, wherein when the alumina hydrate is dispersed in water at a solids concentration of 25% by weight to form a dispersion, the dispersion has a viscosity not higher than 500 cP as measured at 20° C. and a shear rate of 10.2 sec−1.

A dispersion of an alumina hydrate for the preparation of a recording medium, comprising an alumina hydrate and deionized water, the alumina hydrate containing 0.1 to 1.0% by weight of a nitrate anion and having a pore radius distribution including at least one peak located at less than 100 Å and at least another peak located within a range of from 100 to 200 Å, wherein when the alumina hydrate is dispersed in water at a solids concentration of 15% by weight to form a dispersion, the dispersion has a viscosity not higher than 75 cP as measured at 20° C. and a shear rate of 7.9 sec−1.

A dispersion of an alumina hydrate for the preparation of a recording medium, comprising an alumina hydrate and deionized water, the alumina hydrate containing 0.1 to 1.0% by weight of a nitrate anion and having a pore radius distribution including at least one peak located at less than 100 Å and at least another peak located within a range of from 100 to 200 Å, wherein when the alumina hydrate is dispersed in water at a solids concentration of 20% by weight to form a dispersion, the dispersion has a viscosity not higher than 100 cP as measured at 20° C. and a shear rate of 10.2 sec−1.

A dispersion of an alumina hydrate for the preparation of a recording medium, comprising an alumina hydrate and deionized water, the alumina hydrate containing 0.1 to 1.0% by weight of a nitrate anion and having a pore radius distribution including at least one peak located at less than 100 Å and at least another peak located within a range of from 100 to 200 Å, wherein when the alumina hydrate is dispersed in water at a solids concentration of 25% by weight to form a dispersion, the dispersion has a viscosity not higher than 500 cP as measured at 20° C. and a shear rate of 10.2 sec−1.

A dispersion of an alumina hydrate for the preparation of a recording medium, comprising an alumina hydrate and deionized water, the alumina hydrate containing 0.1 to 1.0% by weight of a nitrate anion and 0.01 to 1.00% by weight of titanium dioxide, wherein when the alumina hydrate is dispersed in water at a solids concentration of 15% by weight to form a dispersion, the dispersion has a viscosity not higher than 75 cP as measured at 20° C. and a shear rate of 7.9 sec−1.

A dispersion of an alumina hydrate for the preparation of a recording medium, comprising an alumina hydrate and deionized water, the alumina hydrate containing 0.1 to 1.0% by weight of a nitrate anion and 0.01 to 1.00% by weight of titanium dioxide, wherein when the alumina hydrate is dispersed in water at a solids concentration of 20% by weight to form a dispersion, the dispersion has a viscosity not higher than 100 cP as measured at 20° C. and a shear rate of 10.2 sec−1.

A dispersion of an alumina hydrate for the preparation of a recording medium, comprising an alumina hydrate and deionized water, the alumina hydrate containing 0.1 to 1.0% by weight of a nitrate anion and 0.01 to 1.00% by weight of titanium dioxide, wherein when the alumina hydrate is dispersed in water at a solids concentration of 25% by weight to form a dispersion, the dispersion has a viscosity not higher than 500 cP as measured at 20° C. and a shear rate of 10.2 sec−1.