A microporous lead-containing solid material is produced, which can serve as a carrier for desired materials into a reaction for various desired purposes. For example, if the microporous solid is impregnated with borax it tends to inhibit the growth of unduly large crystals of tetrabasic lead, which is useful in producing batteries having improved functional qualities.

A microporous lead-containing solid material is produced, which can serve as a carrier for desired materials into a reaction for various desired purposes. For example, if the microporous solid is impregnated with borax it tends to inhibit the growth of unduly large crystals of tetrabasic lead, which is useful in producing batteries having improved functional qualities.

Described herein is crystalline PbSO.sub.4 comprising tabular and/or diamond-shaped crystals having an average crystal size, as determined by dynamic light scattering and particle imaging using a transmission electron microscope, in the range of about 10 nm to about 2 ?m, wherein at least about 80% of the PbSO.sub.4 crystals have diameters within about ?20% of the average diameter. Also described herein electrodes, lead-acid electrochemical cells, and lead-acid batteries comprising the crystalline PbSO.sub.4.

Described herein is crystalline PbSO.sub.4 comprising tabular and/or diamond-shaped crystals having an average crystal size, as determined by dynamic light scattering and particle imaging using a transmission electron microscope, in the range of about 10 nm to about 2 ?m, wherein at least about 80% of the PbSO.sub.4 crystals have diameters within about ?20% of the average diameter. Also described herein electrodes, lead-acid electrochemical cells, and lead-acid batteries comprising the crystalline PbSO.sub.4.

What is provided is stannous oxide having an ?-ray emission amount of 0.002 cph/cm.sup.2 or less after heating in an atmosphere at 100? C. for 6 hours. Tin containing lead as an impurity is dissolved in a sulfuric acid aqueous solution to prepare a tin sulfate aqueous solution, and lead sulfate is precipitated in the aqueous solution and removed. While stirring the tin sulfate aqueous solution from which lead sulfate has been removed, a lead nitrate aqueous solution containing lead having an ?-ray emission amount of 10 cph/cm.sup.2 or less is added to cause lead sulfate to be precipitated in the tin sulfate aqueous solution, and simultaneously the tin sulfate aqueous solution is circulated while removing the lead sulfate from the aqueous solution. A neutralizing agent is added to the tin sulfate aqueous solution to collect stannous oxide.

The invention is directed to a radical improvement of the specific electrochemical and corrosive characteristics of a lead-acid battery without a drastic change in the process of battery producing. The lead-carbon metal composite material contains from 0.1 to 10% by weight of carbon, lead is the remainder, while the structure of the material contains carbon allotropic modifications from graphene to graphite. The method for material synthesizing is characterized in that lead or its alloys are melted in a melt of alkaline and/or alkaline earth metal halides containing from 1 to 20 wt. % of metal carbides or non-metals with a particle size of 100 nm to 200 ?m, or solid organic substances, for 1-5 hours at a temperature of 700-900? C.

A microporous lead-containing solid material is produced, which can serve as a carrier for desired materials into a reaction for various desired purposes. For example, if the microporous solid is impregnated with borax it tends to inhibit the growth of unduly large crystals of tetrabasic lead, which is useful in producing batteries having improved functional qualities.

A microporous lead-containing solid material is produced, which can serve as a carrier for desired materials into a reaction for various desired purposes. For example, if the microporous solid is impregnated with borax it tends to inhibit the growth of unduly large crystals of tetrabasic lead, which is useful in producing batteries having improved functional qualities.

The present invention provides the use of a lead (IV) containing compound to prepare a lead chalcogenide nanocrystal and a method for producing broadband lead chalcogenide nanocrystals in a low cost, size-controllable and scalable method, the method comprising contacting a lead (IV) containing compound with an organic acid and a chalcogen-containing reagent.

The present invention provides the use of a lead (IV) containing compound to prepare a lead chalcogenide nanocrystal and a method for producing broadband lead chalcogenide nanocrystals in a low cost, size-controllable and scalable method, the method comprising contacting a lead (IV) containing compound with an organic acid and a chalcogen-containing reagent.