Products

SINTERED SPINEL

Features

  • Generally, "spinel" is a collective designation of oxides having a spinel type structure expressed in chemical formula as RO · R2O3. On the other hand, SINTERED SPINEL (NSP Series) is magnesium-aluminum spinel (MgO·Al2O3) having a uniform, dense structure as a result of wet-blending, forming and firing selected raw materials.
  • NSP-70 has a structure near the theoretical value of spinel. NSP-90 has a structure with excessive alumina with a part of alumina turned to a solid solution to spinel.
  • SINTERED SPINEL is used for the lining refractories of molten steel ladles in the iron and steel industry, saggers for firing positive electrode materials in the lithium ion battery industry and special porcelains such as setters.
  • This product has the following advantageous chemical and physical properties:
    • High melting point
    • High chemical stability
    • High corrosion resistance against alkali and acid
    • High volume stability
    • High resistance to thermal shock

Product lineup

We treat various grain sizes for both NSP-70 and NSP-90.

NSP-70 3-1mm

NSP-70  3-1mm

NSP-70 -20μm

NSP-70  -20μm

Product information

Standard quality

  NSP-70 NSP-90
Standard value Rep. value Standard value Rep. value
Chemical
composition
(%)
SiO2 Max. 0.30 0.16 Max. 0.30 0.13
Al2O3 72.00-75.00 72.73 87.00-91.00 88.84
Fe2O3   0.11   0.12
TiO2   0.02   0.07
CaO   0.20   0.27
MgO MgO + Al2O3
=Min. 98.00
26.64 MgO + Al2O3
=Min. 98.00
10.47
K2O   Tr.   Tr.
Na2O   0.14   0.16
Physical
property
value
(6-10 mesh)
Water absorption (%)   0.40   0.80
Apparent specific gravity   3.30   3.53
Bulk specific gravity Min. 3.20 3.26 Min. 3.35 3.41
Apparent porosity (%) Max. 5.0 1.30 Max. 5.0 3.40

Grain size standard (NSP-70)

  Standard value Typical value
3-1mm μm +2800 -1000 +2800 2800/1700 1700/1000 -1000  
% Max. 10 Max. 10 2.7 58.3 38.0 1.0  
-1mm μm +1000 -250 +1000 1000/500 500/250 -250  
% Max. 5 Max. 30 1.5 51.1 25.4 22.0  
-200mesh μm   -75 +150 150/75 75/45 -45  
%   75-85 2.6 15.6 14.5 67.3  
-20μm μm +20   -20 -15 -10 -5 -1
% Max. 5   0.1 1.4 9.9 38.7 49.9

Grain size standard (NSP-90)

  Standard value Typical value
3-6
mesh
μm +6700 -3350 +6700 6700/4750 4750/4000 4000/3350 -3350  
% Max. 2 Max.10 0.0 37.8 32.9 25.7 3.6  
6-14
mesh
μm +3350 -1000 +3350 3350/2800 2800/2360 2360/1400 1400/1000 -1000
% Max. 5 Max. 5 0.1 14.1 22.5 48.6 14.4 0.3
-14
mesh
μm +1180 -300 +1180 1180/600 600/300 -300    
% Max. 5 10-35 0.8 53.0 25.1 21.1    

If you have any inquiry, please contact the following:

[Ceramics Sales Dept.]
12-8, Shiokusa-cho, Seto-shi, Aichi 489-0895, Japan
Tel: +81-561-21-5670  Fax: +81-561-21-4124

→For the inquiry form, click here.

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