Ceramics Products

Spherical Alumina

Boratherm™ SA

Spherical Alumina powders are used in the manufacturing process of thermal management products, which are relied on to regulate the temperature of electronic systems and devices.
These include:

  • Thermally Conductive Plastics used in hardware and made by adding conductive fillers to polymers through a compounding process. Applications: automotive and aerospace parts, healthcare equipment, and electrical and electronic parts such as mounting devices, heat sinks, and cooling systems.
  • Thermal Interface Materials (TIMs) inserted between components to support thermal conduction in pads, tapes, and epoxies.
  • Base materials for hardware, software, and printed circuit boards to support thermal dissipation and control.

Features and Benefits

  • Spherical shape enables low viscosity
  • Narrow particle size distribution
  • Low density
  • Thermal conductor
  • Electrical Insulator
spherical alumina

Granulometric Data & Physical Characteristics (Regular Soda Grades)

Mean values. These do not represent a specification.

Size SA0050N SA0080N SA-0200N SA0400N SA0600N Method
% Passing on Ind. Sieve
<2μm
14.58
13.36
6.23
2.13
2.10
%
CILAS Laser
% Passing on Ind. Sieve
<5μm
34.87
29.18
7.35
2.13
2.13
%
CILAS Laser
% Passing on Ind. Sieve
<8μm
61.57
52.41
13.55
2.13
2.55
%
CILAS Laser
% Passing on Ind. Sieve
<12μm
82.67
74.58
25.04
2.54
2.76
%
CILAS Laser
% Passing on Ind. Sieve
<25μm
99.81
98.47
64.14
8.60
6.00
%
CILAS Laser
% Passing on Ind. Sieve
<45μm
100.0
100.0
92.68
65.8
22.5
%
CILAS Laser
% Passing on Ind. Sieve
<75μm
100.0
100.0
100.0
98.7
70.8
%
CILAS Laser
Particle Size
D10
0.97
1.05
6.47
25.71
32.18
μm
CILAS Laser
Particle Size
D50
6.57
7.66
19.55
36.69
62.26
μm
CILAS Laser
Particle Size
D90
14.28
16.95
42.02
59.24
92.89
μm
CILAS Laser
Moisture Content
0.03
0.06
0.03
0.03
0.02
wt.%
105°C oven
pH Value
7.68
7.51
6.94
10.43
9.69
-
pH meter
Specific Gravity
3.90
3.90
3.90
3.90
3.90
-
pycnometer
Electrical Conductivity
60.17
56.67
30.09
140.50
120.83
μs/cm
E.C meter

CHEMICAL ANALYSIS (XRF)

Mean values. These do not represent a specification.

SA0050N SA0080N SA-0200N SA0400N SA0600N Method
SiO2
0.11
0.14
0.12
0.13
0.06
%
XRF
Al2O3
99.61
99.58
99.50
99.56
99.75
%
XRF
Fe2O3
0.03
0.03
0.04
0.02
0.02
%
XRF
Na2O
0.21
0.19
0.17
0.16
0.08
%
XRF

GRANULOMETRIC DATA & PHYSICAL CHARACTERISTICS (LOW SODA GRADES)

Mean values. These do not represent a specification.

Size SA0050 SA0080 SA0380 SA0700 Method
% Passing on Ind. Sieve
<2μm
15.46
11.15
3.27
2.04
%
CILAS Laser
% Passing on Ind. Sieve
<5μm
43.71
21.22
3.48
2.20
%
CILAS Laser
% Passing on Ind. Sieve
<8μm
70.54
40.29
4.50
2.81
%
CILAS Laser
% Passing on Ind. Sieve
<12μm
85.78
59.80
6.34
3.58
%
CILAS Laser
% Passing on Ind. Sieve
<25μm
99.77
95.43
13.11
6.34
%
CILAS Laser
% Passing on Ind. Sieve
<45μm
100.0
100.0
52.8
21.9
%
CILAS Laser
% Passing on Ind. Sieve
<75μm
100.0
100.0
94.2
63.9
%
CILAS Laser
Particle Size
D10
0.85
1.47
20.77
32.11
μm
CILAS Laser
Particle Size
D50
5.53
9.83
43.82
65.5
μm
CILAS Laser
Particle Size
D90
13.68
21.41
68.61
101.6
μm
CILAS Laser
Moisture Content
0.03
0.01
0.03
0.01
wt.%
105°C oven
pH Value
7.36
7.45
7.79
7.25
-
pH meter
Specific Gravity
3.90
3.90
3.90
3.90
-
pycnometer
Electrical Conductivity
56.7
15.4
15.1
7.45
μs/cm
E.C meter

CHEMICAL ANALYSIS (XRF)

Mean values. These do not represent a specification.

SA0050 SA0080 SA0380 SA0700 Method
SiO2
0.06
0.08
0.09
0.16
%
XRF
Al2O3
99.7
99.8
99.7
99.8
%
XRF
Fe2O3
0.03
0.03
0.04
0.04
%
XRF
Na2O
0.03
0.03
0.03
0.03
%
XRF

Granulometric Data & Physical Characteristics (Washed Grades)

Mean values. These do not represent a specification.

Size SA-0020W SA-0050W SA-0080W SA-0200W Unit Method
% Passing on Ind. Sieve
<2μm
5.86
0.85
0.44
5.98
%
CILAS Laser
% Passing on Ind. Sieve
<5μm
1.77
4.83
2.58
7.04
%
CILAS Laser
% Passing on Ind. Sieve
<8μm
0.05
2.50
3.53
12.64
%
CILAS Laser
% Passing on Ind. Sieve
<12μm
0.00
2.03
3.76
23.27
%
CILAS Laser
% Passing on Ind. Sieve
<25μm
0.00
0.00
1.20
61.13
%
CILAS Laser
% Passing on Ind. Sieve
<45μm
0.00
0.00
0.00
92.63
%
CILAS Laser
% Passing on Ind. Sieve
<75μm
0.00
0.00
0.00
100.0
%
CILAS Laser
Particle Size
D10
0.21
0.71
1.13
6.76
μm
CILAS Laser
Particle Size
D50
1.89
4.45
8.04
20.57
μm
CILAS Laser
Particle Size
D90
3.73
11.89
18.23
42.25
μm
CILAS Laser
Particle Size
D100
8.00
23.00
36.00
71.00
μm
CILAS Laser
Moisture Content
0.01
0.01
0.01
0.03
%
105°C oven
pH Value
5.71
6.14
6.50
8.01
-
pH meter
Specific Gravity
3.90
3.90
3.90
3.90
-
pycnometer
Electrical Conductivity
2.70
1.91
2.21
1.89
μs/cm
E.C meter

CHEMICAL ANALYSIS (XRF)

Mean values. These do not represent a specification.

SA-0020W SA-0050W SA-0080W SA-0200W Unit Method
SiO2
0.04
0.13
0.16
0.10
%
XRF
Al2O3
99.38
99.71
99.65
99.61
%
XRF
Fe2O3
0.09
0.04
0.03
0.04
%
XRF
Na2O
0.08
0.03
0.03
0.13
%
XRF

Potential Applications

  • Thermal adhesives
  • Gap pads
  • Gap fillers
  • Thermally conductive plastics

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Spherical Alumina – Boratherm

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Spherical Alumina – Boratherm

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Republic of Korea

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Japan

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