{"title":"刚玉结构(Mg4-xMx)(Nb2-yAy)O9 (M=Mn, Co, and Zn, A=Ta和Sb)陶瓷的微波介电性能","authors":"A. Kan, H. Ogawa","doi":"10.1109/ISAF.2007.4393316","DOIUrl":null,"url":null,"abstract":"The (Mg<sub>4</sub> <sub>-x</sub>M<sub>x</sub>)(Nb<sub>2-y</sub>A<sub>y</sub>)O<sub>9</sub> (M=Mn, Co, and Zn, A=Ta and Sb) compound with corundum structure were prepared and the microwave dielectric properties, crystal structure and covalency of cation-oxygen bonds of the compounds were investigated in this study. The global instability index (GII) of (Mg<sub>4-x</sub>M<sub>x</sub>)Nb<sub>2</sub>O<sub>9</sub> compounds was higher than that of Mg<sub>4</sub>(Nb<sub>2-y</sub>A<sub>y</sub>)O<sub>9</sub> compounds and the GIl values of (Mg<sub>4-x</sub>M<sub>x</sub>)Nb<sub>2</sub>O<sub>9</sub> compounds increased with increasing the composition x. From the calculation of cation-oxygen bonds, it was found covalency of M-O bond in the (Mg<sub>4-x</sub>M<sub>x</sub>)Nb<sub>2</sub>O<sub>9</sub> compounds decreased, depending on the composition. The dielectric constant of the compounds ranged from 11 to 16 by the M substitutions for Mg, whereas the quality factor (Q f) drastically decreased form 210000 to 5000 GHz. On the other hand, the A substitution for Nb enhanced the increase in the Q f value of the compounds; the highest value was 347000 GHz.","PeriodicalId":321007,"journal":{"name":"2007 Sixteenth IEEE International Symposium on the Applications of Ferroelectrics","volume":"25 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2007-12-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"3","resultStr":"{\"title\":\"Microwave Dielectric Properties of Corundum-Structured (Mg4-xMx)(Nb2-yAy)O9 (M=Mn, Co, and Zn, A=Ta and Sb) Ceramics\",\"authors\":\"A. Kan, H. Ogawa\",\"doi\":\"10.1109/ISAF.2007.4393316\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"The (Mg<sub>4</sub> <sub>-x</sub>M<sub>x</sub>)(Nb<sub>2-y</sub>A<sub>y</sub>)O<sub>9</sub> (M=Mn, Co, and Zn, A=Ta and Sb) compound with corundum structure were prepared and the microwave dielectric properties, crystal structure and covalency of cation-oxygen bonds of the compounds were investigated in this study. The global instability index (GII) of (Mg<sub>4-x</sub>M<sub>x</sub>)Nb<sub>2</sub>O<sub>9</sub> compounds was higher than that of Mg<sub>4</sub>(Nb<sub>2-y</sub>A<sub>y</sub>)O<sub>9</sub> compounds and the GIl values of (Mg<sub>4-x</sub>M<sub>x</sub>)Nb<sub>2</sub>O<sub>9</sub> compounds increased with increasing the composition x. From the calculation of cation-oxygen bonds, it was found covalency of M-O bond in the (Mg<sub>4-x</sub>M<sub>x</sub>)Nb<sub>2</sub>O<sub>9</sub> compounds decreased, depending on the composition. The dielectric constant of the compounds ranged from 11 to 16 by the M substitutions for Mg, whereas the quality factor (Q f) drastically decreased form 210000 to 5000 GHz. On the other hand, the A substitution for Nb enhanced the increase in the Q f value of the compounds; the highest value was 347000 GHz.\",\"PeriodicalId\":321007,\"journal\":{\"name\":\"2007 Sixteenth IEEE International Symposium on the Applications of Ferroelectrics\",\"volume\":\"25 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2007-12-04\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"3\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"2007 Sixteenth IEEE International Symposium on the Applications of Ferroelectrics\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ISAF.2007.4393316\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"2007 Sixteenth IEEE International Symposium on the Applications of Ferroelectrics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ISAF.2007.4393316","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Microwave Dielectric Properties of Corundum-Structured (Mg4-xMx)(Nb2-yAy)O9 (M=Mn, Co, and Zn, A=Ta and Sb) Ceramics
The (Mg4-xMx)(Nb2-yAy)O9 (M=Mn, Co, and Zn, A=Ta and Sb) compound with corundum structure were prepared and the microwave dielectric properties, crystal structure and covalency of cation-oxygen bonds of the compounds were investigated in this study. The global instability index (GII) of (Mg4-xMx)Nb2O9 compounds was higher than that of Mg4(Nb2-yAy)O9 compounds and the GIl values of (Mg4-xMx)Nb2O9 compounds increased with increasing the composition x. From the calculation of cation-oxygen bonds, it was found covalency of M-O bond in the (Mg4-xMx)Nb2O9 compounds decreased, depending on the composition. The dielectric constant of the compounds ranged from 11 to 16 by the M substitutions for Mg, whereas the quality factor (Q f) drastically decreased form 210000 to 5000 GHz. On the other hand, the A substitution for Nb enhanced the increase in the Q f value of the compounds; the highest value was 347000 GHz.
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