Search results
Results from the WOW.Com Content Network
Polysilicon hydride is a two-dimensional polymer network. Many cluster compounds of lithium silicides are known, such as Li 13 Si 4, Li 22 Si 5, Li 7 Si 3 and Li 12 Si 7. [2] Li 4.4 Si is prepared from silicon and lithium metal in high-energy Ball mill process. [3] Potential uses include electrodes in lithium batteries. Li 12 Si 7 has a Zintl ...
In materials science, a polymer blend, or polymer mixture, is a member of a class of materials analogous to metal alloys, in which at least two polymers are blended together to create a new material with different physical properties. [1]
Polycarbonate is commonly used in eye protection, as well as in other projectile-resistant viewing and lighting applications that would normally indicate the use of glass, but require much higher impact-resistance. Polycarbonate lenses also protect the eye from UV light.
The C–Si bond is somewhat polarised towards carbon due to carbon's greater electronegativity (C 2.55 vs Si 1.90), and single bonds from Si to electronegative elements are very strong. [14] Silicon is thus susceptible to nucleophilic attack by O − , Cl − , or F − ; the energy of an Si–O bond in particular is strikingly high.
Direct bonding, or fusion bonding, is a wafer bonding process without any additional intermediate layers. It is based on chemical bonds between two surfaces of any material possible meeting numerous requirements. [1] These requirements are specified for the wafer surface as sufficiently clean, flat and smooth.
Through inert atmospheric pyrolysis of preceramic polymers, silicon carbide in a glassy amorphous form is also produced. [33] The polymorphism of SiC is characterized by a large family of similar crystalline structures called polytypes. They are variations of the same chemical compound that are identical in two dimensions and differ in the third.
A polycarbonate is an oxocarbon dianion consisting of a chain of carbonate units, where successive carbonyl groups are directly linked to each other by shared additional oxygen atoms. That is, they are the conjugate bases of polycarbonic acids , the conceptual anhydrides of carbonic acid , or polymers of carbon dioxide .
Silicone is often confused with one of its constituent elements, silicon, but they are distinct substances. Silicon is a chemical element, a hard dark-grey semiconducting metalloid, which in its crystalline form is used to make integrated circuits ("electronic chips") and solar cells. Silicones are compounds that contain silicon, carbon ...