Viktor Vekky Ronald Repi, - and Azwar Manaf, - and Bambang Soegiono, - (2014) Microwave properties of composite Ba0.5Sr0.5Fe11.7Mn0.15Ti0.15O19/La0.7Ba0.3MnO3 material. Advanced Materials Research, 896. pp. 440-443.
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Abstract
Keywords: Microwave properties, composite material, magnetic and electric material, absorber material, mechanical alloying. Abstract. Mn-Ti substituted Barium - Strontium Hexaferrite and Barium – Lanthanum Manganite both well established materials which have been shown poses microwave absorbtion properties. As the properties of composite system are a composition sensitive, composite materials must be properly designed to meet a specific application. In this paper, we report our recent investigation on microwave absorbtion properties of composite Ba0.5Sr0.5Fe11.7Mn0.15Ti0.15O19/La0.7Ba0.3MnO3 system. Composite components respectively Ba0.5Sr0.5Fe11.7Mn0.15Ti0.15O19 and La0.7Ba0.3MnO3 were prepared through mechanical alloying route employing a planetary ball mill for 20 hrs. The two milled powders were sintered at a temperature 1100 0C for 10 hours to ensure the crystallization towards fully crystalline materials. Composites with 2 different compositions were studied by FTIR and VNA from which results were compared with that of each component. Results of the investigation concluded that, the composite of Ba0.5Sr0.5Fe11.7Mn0.15Ti0.15O19/La0.7Ba0.3MnO3 system is a good microwave absorbing material in the frequency range 9 GHz-15 GHz, particularly, sample with coded A03B07 has a wide range frequencies absorption.
| Item Type: | Article |
|---|---|
| Subjects: | T Technology > T Technology (General) |
| Divisions: | Artikel > Teknik |
| Depositing User: | BPSI Unas |
| Date Deposited: | 19 Aug 2017 05:55 |
| Last Modified: | 19 Aug 2017 05:55 |
| URI: | http://repository.unas.ac.id/id/eprint/43 |
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