Jena Glass
Jena glass:-
it is a mixture of zinc and barium borosilicates.
Jena glass has very low thermal expansion and contraction thus it is used to make laboratory glassware and kitchen glassware.
Use of pyrex and Jenna glass almost same.
Definition of glass
Definition:- Glass is an amorphous or noncrystalline transparent or translucent supercooled solution of various slicate. Properties:- 1) Glass does not possess sharp boiling and melting point. 2) It is not a true solid,it is an amorphous solid. 3) Constituent particals are not arranged in a regular way. 4) It has short range order.( regular and predictable arrangement of the atoms over a short distance ) 5) It is isotropic(Have physical properties same in different directions) 6) Cooling curve or glass is continuos. Common formula of glass:- R₂O.MO.SiO₂ R is monovalent cation(Li, Na, K,...) M is divalent cation (Mg, Can, Zn, Pb ...)
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