월라스토나이트(Wollastonite)

소개 및 특징

A naturally occurring, calcium metasilicate (CaSiO3), white, non-metallic mineral with an acicular particle shape. Wollastonite’s unique chemistry and acicular (needle-shaped) physical structure make it one of the world’s most versatile and effective value-added performance materials.

Chemical Composition

Component	Lewis Mine, New York Typical Value (%)	Pilares Mine, Mexico Typical Value Wet Process (%)	Pilares Mine, Mexico Typical Value Dry Process (%)
CaO	46.36	44.94	45.72
SiO2	51.60	52.94	46.52
Fe2O3	0.77	0.28	0.25
Al2O3	0.40	0.30	0.25
MnO	0.15	0.04	0.02
MgO	0.15	0.75	0.71
TiO2	0.05	0.05	0.05
K2O	0.02	0.23	0.20
Wt. Loss (1000˙C)	0.50	0.47	6.30

Typical Properties

Typical Properties	Value
APPEARANCE	WHITE
MORPHOLOGY	ACICULAR
MOLECULAR WEIGHT	116
SPECIFIC GRAVITY	2.9
REFRACTIVE INDEX	1.63
pH (10% SLURRY)	9.9
WATER SOLUBILITY (g/100cc)	0.0095
DENSITY (lbs./cu.ft.)	181
BULKING VALUE (gal./lbs.)	0.0413
MOHS HARDNESS	4.5
COEFFICIENT OF EXPANSION (mm/mm/˙C)	6.5 X 10-6
MELTING POINT (˙C) – theoretical MELTING POINT (˙C) – by ASTM D1857	1540 1410

※ 모든 값은 대표값이며 규격으로 사용될 수 없습니다.

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