9.Ferro Frit 3221

M.P./°F 1450
Silica/Alumina ratio: 3.8:1
Equivalent Molecular Weight: 398.967

Molecular Formula of Ferro Frit 3221:

	K2O 	0.175 	Al2O3 	0.691 	SiO2 	2.610
	Na2O 	0.812 	B2O3 	1.501
	CaO 	0.013

Percentage Analysis

	39.29 % 	SiO2
	17.66 % 	Al2O3
	4.13 % 		K2O
	12.61 % 	Na2O
	0.18 % 		CaO
	26.12 % 	B2O3
	_____________________
	100 % 		TOTAL

Comments: 

	9.4 x 10-6 coefficient of expansion (50-450° C)