Electronics chemical silica quartz lumps silica gel sand price-Hebei Longtongyi Technology Co.,Ltd.

Electronics chemical silica quartz lumps silica gel sand price

Products Description

Widely distributed in nature, such as quartz, quartz sand and so on. White or colorless granules, those with high iron content are pale yellow. Density 2.2 ~ 2.66. Melting point 1670°C (tridymite); 1710°C (cristobalite). The boiling point is 2230°C and the relative dielectric constant is 3.9. Insoluble in water and slightly soluble in acid, it can work with molten alkalis in granular state.

Chemical formula：SiO2 Molecular weight：60.08 Chinese name： silicon dioxide Chinese aliases： silica, silica, silica CAS number： 7631-86-9, also known as silica.

Item	Liquid—1		Liquid—2		Liquid—3		Liquid—4
	high-class	first-class	high-class	first-class	high-class	first-class	high-class	Excellent
Iron,% ≤	0.02	0.05	0.02	0.05	0.02	0.05	0.02	0.05
Water insoluble,% ≤	0.1	0.4	0.1	0.4	0.2	0.6	0.2	0.8
Density(20℃)g/ml	1.336—1.362		1.368—1.394		1.436—1.465		1.526—1.559
Sodium oxide,% ≥	7.5		8.2		10.2		12.8
Silica,% ≥	25.0		26.0		25.7		29.2
Modulus	3.41—3.6		3.1—3.4		2.6—2.9		2.2—2.5

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