Types of Glass
| Name
and Composition |
Properties |
Commonly
found in: |
| Soda-lime
glass SiO2 (72%) Na2O (13%) CaO (11%) |
low
melting point (7000C) cracks easily with sudden temperature changes |
bottles window panes light bulbs |
| borosilicate glass SiO2 B2O3 Al2O3 Na2O |
melting
point (8000C) does not crack easily with sudden temperature changes |
laboratory
apparatus cooking utensils |
| fused
glass SiO2 B2O3 |
high melting point (17000C) |
telescope
mirror and lenses glass rods, glass tubes |
| lead
glass SiO2 PbO K2O Al2O3 Na2O |
lead
(in the glass) absorbs high energy rays can protect against radioactive materials in labs |
prisms tableware art decorative items |
| Dyed
coloured glass transistion metal oxides |
attractive | decorative
items souvenirs |
| Nama and Juzuk | Sifat-sifat |
lazim
dijumpai dalam: |
| kaca
Soda-lime SiO2 (72%) Na2O (13%) CaO (11%) |
takat
lebur rendah (7000C) mudah retak apabila terdapat perubahan suhu mendadak |
botol anak tetingkap mentol lampu |
| kaca
borosilikat SiO2 B2O3 Al2O3 Na2O |
takat
lebur (8000C) tidak retak dengan perubahan suhu mendadak |
radas
makmal perkakas dapur |
| kaca
terlakur SiO2 B2O3 |
takat lebur (17000C) |
cermin
dan kanta teleskop rod dan tuib kaca |
| kaca
plumbum SiO2 PbO K2O Al2O3 Na2O |
plumbum
(dalam kaca) menyerap sinaran tenaga tinggi memberi perlindungan terhadap bahan radioaktif dalam makmal |
prisma pinggan mangkuk meja bahan hiasan |
| kaca
bercelup warna logam peralihan oxida |
cantik | bahan
hiasan cenderamata |
