What is phosphorus glass?
Phosphate glass is a class of optical glasses composed of metaphosphates of various metals. Instead of SiO2 in silicate glasses, the glass forming substrate is P2O5.
What is silver phosphate glass?
Abstract. Phosphate-based glasses are materials of great interest for the regeneration and repair of damaged hard or soft tissues. They have the desirable property of slowly dissolving in the physiological environment, eventually being totally replaced by regenerated tissue.
Is phosphate used in making glass?
Learn about this topic in these articles: Phosphate glasses (used as optical glasses) based on phosphorus pentoxide (P2O5) are highly resistant to hydrofluoric acid and act as efficient heat absorbers when iron oxide is added.
Is silver phosphate glass safe?
The additives based on silver phosphate glass are not hazardous materials, they are colorless and odorless and are easy to process. Depending on the application, 0,2 percent of the additive is already sufficient. The additives are also suitable for applications in polymers with food contact.
Is silver a biocide?
Ionic silver is toxic to bacteria and to some degree to fungi and viruses – that is why it is a very effective biocide.
How is silver an antibacterial?
The use of silver in medicine dates back thousands of years, and scientists have long known that the metal is a potent antibacterial agent. Silver ions perform their deadly work by punching holes in bacterial membranes and wreaking havoc once inside.
Is copper a biocide?
Copper ions, either alone or in copper complexes, have been used to disinfect liquids, solids and human tissue for centuries. Today copper is used as a water purifier, algaecide, fungicide, nematocide, molluscicide as well as an anti-bacterial and anti-fouling agent.
What metal does not hold germs?
Helps inhibit the buildup and growth of infectious bacteria. Stainless steel has no inherent antimicrobial properties and can harbor deadly bacteria for days. Copper is among the most durable metals on the market, with little deterioration or corrosion over time.
Can bacteria grow on gold?
Reith found some of the first convincing evidence that bacteria thrive on gold particles about ten years ago. At multiple sites, thousands of kilometers apart, he and his team found the bacterium Cupriavidus metallidurans living in biofilms on gold nuggets.
What are the physical properties of phosphate glass?
Physical properties. Phosphate glasses are highly resistant to hydrofluoric acid. With an addition of iron oxide, they act as efficient heat absorbers. Iron phosphate and lead iron phosphate glass are alternatives to borosilicate glass for immobilization of radioactive waste.
What are the advantages of using phosphate glasses in fiber optics?
For example, they are often well suited for making fiber amplifiers with large gain bandwidth, as the spectral shape of the transition cross sections is wide and quite smooth. Phosphate glasses have a very low glass transition temperature, typically below 400 °C.
What is the conductivity of phosphate-based glasses?
Depending on the composition, the ionic conductivity of phosphate-based glasses spans many orders of magnitude reaching values comparable to that of liquid electrolytes.
What is the function of silver phosphate glass?
Silver -containing phosphate glass is used in phosphate glass dosimeters. It emits fluorescent light when irradiated by ultraviolet light, when previously exposed to ionizing radiation, in an amount proportional to the dose.