Takeshi Hagiwara, Kaoru Kouzu, Shigeru Okada, A. Nomura, Kunio Yubuta, T. Shishido, Akira Yoshikawa, T. Mori
{"title":"利用碱氟化物合成 AlLB14（L=Li 或 Na）晶体及其特性","authors":"Takeshi Hagiwara, Kaoru Kouzu, Shigeru Okada, A. Nomura, Kunio Yubuta, T. Shishido, Akira Yoshikawa, T. Mori","doi":"10.35848/1347-4065/ad6659","DOIUrl":null,"url":null,"abstract":"\n Syntheses of AlLB14 (L=Li or Na or K) crystals were grown using LiF or NaF or KF and crystalline boron powders as the starting materials using high-temperature Al melt at soaking temperature 1573~1773 K for soaking time 5 h under an Ar atmosphere. A new compound AlNaB14 and AlLiB14 crystals were obtained from LiF or NaF and B powders, and the atomic ratios (n=B/L=2.0~4.0) of starting materials. AlKB14 crystal was not obtained from KF and B powders as starting materials. The micro-Vickers hardness of AlLB14 crystals is 24(±1) GPa for AlLiB14 and 25(±1) GPa for AlNaB14. The oxidation initiation temperature of AlLiB14 was about 815 K, and the peak due to the exothermic reaction was about 960 K for AlLiB14 and about 990 K for AlNaB14. The final oxidation products were Li2B2O4, Al4B2O9, B2O3 and amorphous phases. The values for the electrical resistivity of the AlLB14 compound were 2.4~157 Ω·cm","PeriodicalId":505044,"journal":{"name":"Japanese Journal of Applied Physics","volume":"6 1","pages":""},"PeriodicalIF":0.0000,"publicationDate":"2024-07-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Syntheses of AlLB14(L=Li or Na) crystals using alkali fluorides and its properties\",\"authors\":\"Takeshi Hagiwara, Kaoru Kouzu, Shigeru Okada, A. Nomura, Kunio Yubuta, T. Shishido, Akira Yoshikawa, T. Mori\",\"doi\":\"10.35848/1347-4065/ad6659\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"\\n Syntheses of AlLB14 (L=Li or Na or K) crystals were grown using LiF or NaF or KF and crystalline boron powders as the starting materials using high-temperature Al melt at soaking temperature 1573~1773 K for soaking time 5 h under an Ar atmosphere. A new compound AlNaB14 and AlLiB14 crystals were obtained from LiF or NaF and B powders, and the atomic ratios (n=B/L=2.0~4.0) of starting materials. AlKB14 crystal was not obtained from KF and B powders as starting materials. The micro-Vickers hardness of AlLB14 crystals is 24(±1) GPa for AlLiB14 and 25(±1) GPa for AlNaB14. The oxidation initiation temperature of AlLiB14 was about 815 K, and the peak due to the exothermic reaction was about 960 K for AlLiB14 and about 990 K for AlNaB14. The final oxidation products were Li2B2O4, Al4B2O9, B2O3 and amorphous phases. The values for the electrical resistivity of the AlLB14 compound were 2.4~157 Ω·cm\",\"PeriodicalId\":505044,\"journal\":{\"name\":\"Japanese Journal of Applied Physics\",\"volume\":\"6 1\",\"pages\":\"\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2024-07-22\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Japanese Journal of Applied Physics\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.35848/1347-4065/ad6659\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Japanese Journal of Applied Physics","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.35848/1347-4065/ad6659","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Syntheses of AlLB14(L=Li or Na) crystals using alkali fluorides and its properties
Syntheses of AlLB14 (L=Li or Na or K) crystals were grown using LiF or NaF or KF and crystalline boron powders as the starting materials using high-temperature Al melt at soaking temperature 1573~1773 K for soaking time 5 h under an Ar atmosphere. A new compound AlNaB14 and AlLiB14 crystals were obtained from LiF or NaF and B powders, and the atomic ratios (n=B/L=2.0~4.0) of starting materials. AlKB14 crystal was not obtained from KF and B powders as starting materials. The micro-Vickers hardness of AlLB14 crystals is 24(±1) GPa for AlLiB14 and 25(±1) GPa for AlNaB14. The oxidation initiation temperature of AlLiB14 was about 815 K, and the peak due to the exothermic reaction was about 960 K for AlLiB14 and about 990 K for AlNaB14. The final oxidation products were Li2B2O4, Al4B2O9, B2O3 and amorphous phases. The values for the electrical resistivity of the AlLB14 compound were 2.4~157 Ω·cm
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