???????? ?????? ?????? Ca1-xNixFe2O4 ????? ??????? ?????????? ??????????? ??????????? ??????? ??????? ???
In this work, the spinal ferrite has been prepared where , used. as radar absorbing materials (RAM). Conventional ceramic techniques method was used to prepare these materials at microwaves with the range of frequencies (8-12) GHz. The absorption for microwaves was examined by the utilized the n...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
University of Thi-Qar
2019-05-01
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| Series: | مجلة علوم ذي قار |
| Online Access: | https://www.jsci.utq.edu.iq/index.php/main/article/view/131 |
| _version_ | 1797595852779290624 |
|---|---|
| author | هاشم علي يسر رسل يوسف ثامر حسن عبد ياسر |
| author_facet | هاشم علي يسر رسل يوسف ثامر حسن عبد ياسر |
| author_sort | هاشم علي يسر |
| collection | DOAJ |
| description | In this work, the spinal ferrite has been prepared where , used. as radar absorbing materials (RAM). Conventional ceramic techniques method was used to prepare these materials at microwaves with the range of frequencies (8-12) GHz. The absorption for microwaves was examined by the utilized the network analyzer. The relationship between reflectivity, absorption and attenuation coefficient were plotted as a function of frequency, and sintered at a temperature . The results showed the emergence of several resonance peaks at , samples showed high Absorbency in contrast low reflectivity and high values of attenuation coefficient at the same frequencies, this is due to domain rotation as well domain wall motion of the ferrite. The values of the real and imaginary parts of relative magnetic Permeability and relative electric permittivity were measure for all samples. The results revealed the apparent resonance peaks at same frequencies that apparent at absorption and reflectivity curves of the same samples. X-ray diffraction tests were made for one sample and result showed the structure of the sample is polycrystalline.
??.??? ????? ????? ????? ?? ?????? ??????? ??? ??? ???? ????? ?????? ??????? ????? ???? ?????? ?????????. ?? ??????? ??????? ??????????? ????????? ?? ????? ??????? ????? ?? ??????? ????? ????? ????? ???? ?? ?????? ??????? ??? ?????? ?????? ??? ??? ?????? ???????? ???? ?????? ??????. ???? ??????? ??? ??????????? ??????????? ????? ???????? ???????? ??????????? ? ???????? ?????????? ????? ?????? ??? ?????? ??????. ???? ??????? ???? ??? ??? ?????? ??? ?????? ?????? ??????, ????? ??????? ???????? ????? ???? ????? ??????? ????? ?? ??????? ???????? ????? ?????? ?? ????? ????? ?????????? ????? ???? ???? ????? ?????????? ????????. ?? ?????? ???????? ??????????? ????? ????? ???? ??????? ???? ????? ???????? ??? ??? ???????? ???? ???? ??? ??????? ?????????? ???????????. ?? ??? ???? ?????? ??????? ?????? ??? ????? ??????? ?? ????? ?????? ?? ????? ???????.
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| first_indexed | 2024-03-11T02:43:20Z |
| format | Article |
| id | doaj.art-fc15b528b2064497bd9305ca21de9349 |
| institution | Directory Open Access Journal |
| issn | 1991-8690 2709-0256 |
| language | English |
| last_indexed | 2024-03-11T02:43:20Z |
| publishDate | 2019-05-01 |
| publisher | University of Thi-Qar |
| record_format | Article |
| series | مجلة علوم ذي قار |
| spelling | doaj.art-fc15b528b2064497bd9305ca21de93492023-11-18T09:30:06ZengUniversity of Thi-Qarمجلة علوم ذي قار1991-86902709-02562019-05-0161 ???????? ?????? ?????? Ca1-xNixFe2O4 ????? ??????? ?????????? ??????????? ??????????? ??????? ??????? ??? هاشم علي يسر0رسل يوسف ثامر1حسن عبد ياسر2جامعة واسط – كلية العلومجامعة واسط / كلية العلوم College Science / Thi Qar universityIn this work, the spinal ferrite has been prepared where , used. as radar absorbing materials (RAM). Conventional ceramic techniques method was used to prepare these materials at microwaves with the range of frequencies (8-12) GHz. The absorption for microwaves was examined by the utilized the network analyzer. The relationship between reflectivity, absorption and attenuation coefficient were plotted as a function of frequency, and sintered at a temperature . The results showed the emergence of several resonance peaks at , samples showed high Absorbency in contrast low reflectivity and high values of attenuation coefficient at the same frequencies, this is due to domain rotation as well domain wall motion of the ferrite. The values of the real and imaginary parts of relative magnetic Permeability and relative electric permittivity were measure for all samples. The results revealed the apparent resonance peaks at same frequencies that apparent at absorption and reflectivity curves of the same samples. X-ray diffraction tests were made for one sample and result showed the structure of the sample is polycrystalline. ??.??? ????? ????? ????? ?? ?????? ??????? ??? ??? ???? ????? ?????? ??????? ????? ???? ?????? ?????????. ?? ??????? ??????? ??????????? ????????? ?? ????? ??????? ????? ?? ??????? ????? ????? ????? ???? ?? ?????? ??????? ??? ?????? ?????? ??? ??? ?????? ???????? ???? ?????? ??????. ???? ??????? ??? ??????????? ??????????? ????? ???????? ???????? ??????????? ? ???????? ?????????? ????? ?????? ??? ?????? ??????. ???? ??????? ???? ??? ??? ?????? ??? ?????? ?????? ??????, ????? ??????? ???????? ????? ???? ????? ??????? ????? ?? ??????? ???????? ????? ?????? ?? ????? ????? ?????????? ????? ???? ???? ????? ?????????? ????????. ?? ?????? ???????? ??????????? ????? ????? ???? ??????? ???? ????? ???????? ??? ??? ???????? ???? ???? ??? ??????? ?????????? ???????????. ?? ??? ???? ?????? ??????? ?????? ??? ????? ??????? ?? ????? ?????? ?? ????? ???????. https://www.jsci.utq.edu.iq/index.php/main/article/view/131 |
| spellingShingle | هاشم علي يسر رسل يوسف ثامر حسن عبد ياسر ???????? ?????? ?????? Ca1-xNixFe2O4 ????? ??????? ?????????? ??????????? ??????????? ??????? ??????? ??? مجلة علوم ذي قار |
| title | ???????? ?????? ?????? Ca1-xNixFe2O4 ????? ??????? ?????????? ??????????? ??????????? ??????? ??????? ??? |
| title_full | ???????? ?????? ?????? Ca1-xNixFe2O4 ????? ??????? ?????????? ??????????? ??????????? ??????? ??????? ??? |
| title_fullStr | ???????? ?????? ?????? Ca1-xNixFe2O4 ????? ??????? ?????????? ??????????? ??????????? ??????? ??????? ??? |
| title_full_unstemmed | ???????? ?????? ?????? Ca1-xNixFe2O4 ????? ??????? ?????????? ??????????? ??????????? ??????? ??????? ??? |
| title_short | ???????? ?????? ?????? Ca1-xNixFe2O4 ????? ??????? ?????????? ??????????? ??????????? ??????? ??????? ??? |
| title_sort | ca1 xnixfe2o4 |
| url | https://www.jsci.utq.edu.iq/index.php/main/article/view/131 |
| work_keys_str_mv | AT hạsẖmʿlyysr ca1xnixfe2o4 AT rslywsftẖạmr ca1xnixfe2o4 AT ḥsnʿbdyạsr ca1xnixfe2o4 |