Brief Introduction

The SinoSi’s Spherical Fused Silica Powder is out of super fine and high quality fused silica sand with high purity. This technology enabled the Sino Surplus International Limited the first mover as well as the leading producer and research institute in this industry. This product enjoys unmatched fineness, granularity, stability and know-how. The specific feature of free coarse granules and perfect chemical stability makes the super fine silica powder become the best filling materials and additive in comprehensive applications including paint-coatings, adhesive, sealants and epoxy resins and etc.

Because of its special properties and excellent characteristics the Spherical Silica Powder is widely used in areas of electronics, electrical apparatus, chemical industry, special in filling and sealing of transistor and semi-conductor components, insulation casting of current transformer, voltage transformer, electronic transformer and dry-type transformer, epikote casting of high-tension cable connection, high-voltage insulator, high-voltage switch, insulation pipes and components of high-voltage electrical apparatus. In addition, it acts well as epoxy powder coating and as the filling materials for arc resistant and weathering resistant surface painting. As the filling material for epikote, silica sand applies to both large-scale components and small-scale precise electrical components.

According to SinoSi's recent research and wide application, the abovementioned properties as well as its perfect effect become quite obvious and extremely successful in the pouring-sealing of integrated circuit chip transistors, magnetic head, and etc. It is proved to be the most ideal high-quality powder filling material.

SinoSi's Inspection is provided through Quality Control System(QCS) on production line by computer program, so SinoSi can guarantee the quality can be kept in a designed level.
 

Full Name of the Commodity with Professional Definition

High Purity & Micro Fused Spherical Silica Powder

Chemical Components

Purity: ： SiO2: 99.9% min.

Impurity （ Only Reference, can not be determined with the order ）

Al: 30ppm Fe: 1.5ppm K:1.2 Na: 1.5 Ca:2.0 Li:0.5 Mg:0.9 Cu:0.5 Ti:0.8 Mn:0.1 Ni:0.02 Cu:0.01 Co:0.01 B:0.05

Granule Size

D50: 0.5-20 um (micron)

Particle Shape

Spherical type, 95% min.

Physical Properties & Specifications

Items	Unit	Specification
Appearance	——	White Powder
+25 μ m	mg/100g	Dmax: 1)15μm 2)25μm
Mean Size	μ m	D50 3---5um
BET Specific Area	m 2 /g	1.5
Electrical Conductivity	μ S/cm	1.0
PH Value	——	5-7
Moisture	%	0.1%
Fe Contains	ppm	50ppm Max
Al Contains	ppm	100ppm max
U contains	ppb	1.0Max.

Note:

•  Our product, its Fe2O3 actual value is about 20ppm and free Fe is about 1ppm but when we sign the contract we can accept as the total Fe contains is 50ppm maximum. Also the Al2O3 contains normally is 50-80ppm but we can only accept as 100ppm the maximum.

•  The actual U contains is about 0.5ppb but we can accept as 1.0ppm the maximum when we sign the contract.

•  Packing Term: Our standard packing is 25kg, 50kg or 100kg/bag and we also can arrange it according to our customer's specific requirement.

Particle shape picture