STRONTIUM STANNATE Property

Density 

5.35 g/cm3

EPA Substance Registry System

Strontium tin oxide (SrSnO3) (12143-34-9)

Safety

Risk Statements 

36/37/38

Safety Statements 

26-36

Hazard and Precautionary Statements (GHS)

Symbol(GHS)

Signal word

Warning

Hazard statements

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P321Specific treatment (see … on this label).

P332+P313IF SKIN irritation occurs: Get medical advice/attention.

P362Take off contaminated clothing and wash before reuse.

STRONTIUM STANNATE Chemical Properties,Usage,Production

Physical properties

BaSnO₃ crystallizes in a cubic perovskite structure. The lattice constant of BaSnO₃ is a=4.1163 ?.

Uses

BaSnO3 with cubic perovskite structure exhibits good dielectric properties. Because of these characteristic properties, BaSnO₃ ceramic is becoming more and more important in material technology. It can be used to prepare thermally stable capacitors and to fabricate ceramic boundary layer capacitors. In recent years, BaSnO₃ has been found to be a very promising sensor material and has therefore received the most attention. In pure as well as doped forms, stannates have been investigated as potential solid-state sensor materials for many gases, including CO, NO_x, H₂ and CO₂. BaSnO₃ has also been used in the preparation of multifunctional temperature–humidity–gas sensors by combining it with BaTiO₃. Detection of gas in BaSnO₃ sensors is achieved by measurement of the electrical properties changes such as resistance and conductivity. The changes are induced in the semiconducting oxide form of BaSnO₃ following adsorption of any given gases on the solid surface. The gas sensitivity of this semiconducting oxide is related to the surface reaction process.

Preparation

BaSnO₃ powder with a crystallite size of 27.6 nm was prepared through a hydrothermal reaction of a peptized SnO₂·xH₃O and Ba(OH)₃ at 250°C. This was followed by crystallization of this hydrothermal product at 330°C. The peptization of the SnO₃·xH₃O gel is dependent on the pH value. Through peptization, the mean particle size of SnO₃·xH₃O in the aqueous solution has been decreased by a factor of 100 to 8 nm. A limited agglomeration in the sol-prepared powder was observed under the microscope. The structure evolution and crystallization behaviors of the solprepared powders were investigated by TG-DTA, IR and XRD. The BaSn(OH)₆ phase in the as-prepared powder transforms into an amorphous phase at 260°C, from which the BaSnO₃ particles nucleate and grow with an increase in temperature. The single-phase BaSnO₃ powder has been obtained at a temperature as low as 330°C. This sol-prepared powder is more sinterable than the gel-prepared powder and can be sintered to a ceramic at 340°C with 90.7% of the theoretic density.