Strontium carbonate or other strontium salts are used in the manufacture of fireworks, as they impart a deep red color to the firework.Strontium is used in scientific studies of neurotransmitter release in neurons. Like calcium, strontium facilitates synaptic vesicle fusion with the synaptic membrane.
The primary use for strontium compounds is in glass for colour television cathode ray tubes to prevent X-ray emission. All parts of the CRT tube have to absorb X-rays. In the neck and the funnel of the tube, lead glass is used for this purpose, but this type of glass shows a browning effect due to the interaction of the X-rays with the glass. Therefore, the front panel has to use a different glass mixture, in which strontium and barium are the X-ray-absorbing materials. The average values for the glass mixture determined for a recycling study in 2005 is 8.5% strontium oxide and 10% barium oxide.
Other applications are as follows:
- Ferrite magnets and refining zinc.
- Strontium titanate has an extremely high refractive index and an optical dispersion greater than that of diamond, making it useful in a variety of optics applications. This quality has also led to its being cut into gemstones, in particular as a diamond simulant.
- Strontium carbonate, strontium nitrate, and strontium sulfate are commonly used in fireworks for red color, and sometimes for other colors too.
- Strontium aluminate is used as a bright phosphor with long persistence of phosphorescence.
- Strontium chloride is sometimes used in toothpastes for sensitive teeth. One popular brand includes 10% total strontium chloride hexahydrate by weight.
- Strontium oxide is sometimes used to improve the quality of some pottery glazes.
- Strontium barium niobate can be used in outdoors holographic 3D displays as a "screen".
- Strontium phosphide is an inorganic compound with the formula Sr3P2 and is used as a laboratory reagent and in the manufacture of chemically reactive devices.