Strontium and Strontium Compounds

Abstract

The main application for strontium, an alkaline‐earth metal, is in the form of strontium compounds. The carbonate, used in cathode ray tubes (CRTs) for color televisions and color computer monitors, is used both in the manufacturing of the glass envelopes of CRTs and in the phosphors which give the color. Owing to use as a eutectic modifier in aluminum–silicon casting alloys, rapid growth of metal production has occurred. The addition of strontium changes the microstructure of the alloy, resulting in improved ductility and strength in cast aluminum automotive parts such as wheels, intake manifolds, and cylinder heads. Strontium metal is also used as an inoculant in ductile iron castings. Other applications include modifying the structure of 6000 series aluminum extrusion alloys, reducing the shrinkage microporosity in magnesium gravity‐casting alloys, and as an addition to lead alloys used for starting, lighting, and ignition batteries. Economic data and health and safety information are included. Chemical and physical properties and discussions of specific strontium compounds are provided.

Evolved gas analysis during sintering of strontium titanate

“…At higher temperature, the source of CO 2 may be from residual unreacted SrCO 3 , which is a common precursor used to synthesise SrTiO 3 . 44 When a sample of pure SrCO 3 was decomposed at the same heating rate, a strong family of signals at m/z512, 16, 28, 44 and 45 was observed over the temperature range of 750-1470uC with a smaller peak between 400 and 650uC; this low temperature range overlaps the first region in Fig. 3a.…”

“…A second plausible reaction is the evolution of SO 2 and fragments thereof as 32 not be surprising as a standard synthesis route to SrTiO 3 is from SrCO 3 , which is derived from mined celestite (SrSO 4 ). 44 To differentiate between TiO and SO 2 evolution, the fact that S, Ti and O have different natural isotopic abundances, as given in Table 2, may be of use. Figure 3c illustrates the m/z signals corresponding to a number of the isotope combinations of the species appearing in Table 2.…”

Lake-Level Changes and Their Paleo-Climatic Implications at the MIS12 Lower Paleolithic (Middle Pleistocene) Site Marathousa 1, Greece

“…Strontium (Sr) rarely forms independent minerals, but if it does, they are usually associated with sedimentary rocks (Hibbins, 2000). One source of Sr may be of biogenic production such as calcifying organisms, however due to the low amount of remains found in the MAR sediments, the share of biogenic Sr is considered negligible (Cohen, 2003;Férnandez et al, 2013).…”