Lanthanum aluminate-calcium-titanate solid solutions (ALTK)
Lanthanum aluminate-calcium-titanate is used as the main crystal phase in high frequency radioceramic. The product is produced in the form of 10 compositions according to Technical Specification (TY) 2664-050-48591565-2016.
Characteristics
|
Name |
Norm |
|||||||||
|
Composition 0 |
Composition 1 |
Composition 2 |
Composition 3 |
Composition 4 |
Composition 5 |
Composition 6 |
Composition 7 |
Composition 8 |
Composition 9 |
|
|
1. Temperature coefficient of dielectric permittivity α 10-6/K |
+33±15 |
0±15 |
-33±15 |
-47±15 |
-75±15 |
-150±20 |
-220±50 |
-330±50 |
-470±70 |
-750±70 |
|
2. Dielectric permittivity ε, not more |
35 |
38 |
41 |
44 |
46 |
50 |
55 |
60 |
75 |
95 |
|
3. Tangent of the dielectric loss angle (tgδ*10-4)
|
||||||||||
|
3.1. before moistening, not more |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
3 |
|
3.2. after moistening, not more |
6 |
6 |
6 |
6 |
6 |
6 |
6 |
6 |
6 |
6 |
|
4. Mass fraction of free La2O3, %, not more |
0,3 |
0,3 |
0,3 |
0,3 |
0,3 |
0,3 |
0,3 |
0,2 |
0,2 |
0,2 |
|
5. Mass fraction of free CaO, %, not more |
0,6 |
0,6 |
0,6 |
0,6 |
0,6 |
0,6 |
0,6 |
0,6 |
0,6 |
0,6 |
|
6. Mass fraction of chlorides (Cl), %, not more |
0,05 |
0,05 |
0,05 |
0,05 |
0,05 |
0,05 |
0,05 |
0,05 |
0,05 |
0,05 |
|
7. Mass fraction of magnetic impurities, %, not more |
0,002 |
0,002 |
0,002 |
0,002 |
0,002 |
0,002 |
0,002 |
0,002 |
0,002 |
0,002 |
|
8. Specific area (Sуд), sm2/g, within |
1500-4000 |
informative |
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|
9. Mass fraction of substances insoluble in HCl, %, not more |
2 |
2 |
2 |
2 |
2 |
2 |
not applicable |
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The ALTK-4 composition is mass produced. The other compositions (ALTK-0, 1, 2, 3, 5, 6, 7, 8, 9) can be synthesized as experimental samples and send for mesuring of electrophysical parameters under the Customer's conditions.
