H. Takeda, S. Tanaka, S. Izukawa, H. Shimizu, T. Nishida, T. Shiosaki
{"title":"在高温压力传感器中使用的langasite型晶体中铝有效替代镓","authors":"H. Takeda, S. Tanaka, S. Izukawa, H. Shimizu, T. Nishida, T. Shiosaki","doi":"10.1109/ULTSYM.2005.1602915","DOIUrl":null,"url":null,"abstract":"Aluminum-substituted La3Ga5SiO14 (LGS)-type crystals, La3Ga5-xAlxSiO14 (LGAS(x)) and La3Ta0.5Ga5.5-xAlxSiO14 (LTGA(x)), were successfully grown by the Czochralski technique. These crystals were 18-23 mm in diameter and 70-100 mm in length. The piezoelectric modulus d11 values (6.21 and 6.92 pC/N) of the LGAS(x=0.9) and LTGA(x=0.5) crystals were slightly larger than that of the pure LGS and La3Ta0.5Ga5.5O14 (LTG) ones (6.08 and 6.89 pC/N), respectively. The LTGA(x=0.5) crystals showed the lowest temperature dependence of d11. The electric resistivity ρ values of the Al-substituted crystals at 400 o C were significantly higher than those of the pure LGS and LTG crystals grown in an oxygen-containing atmosphere. The aluminum substitution is effective for improving the electrical properties of the LGS and LTG, and the LTGA(x=0.5) crystals are suitable for combustion pressure sensor materials.","PeriodicalId":302030,"journal":{"name":"IEEE Ultrasonics Symposium, 2005.","volume":"81 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2005-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"38","resultStr":"{\"title\":\"Effective substitution of aluminum for gallium in langasite-type crystals for a pressure sensor use at high temperature\",\"authors\":\"H. Takeda, S. Tanaka, S. Izukawa, H. Shimizu, T. Nishida, T. Shiosaki\",\"doi\":\"10.1109/ULTSYM.2005.1602915\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Aluminum-substituted La3Ga5SiO14 (LGS)-type crystals, La3Ga5-xAlxSiO14 (LGAS(x)) and La3Ta0.5Ga5.5-xAlxSiO14 (LTGA(x)), were successfully grown by the Czochralski technique. These crystals were 18-23 mm in diameter and 70-100 mm in length. The piezoelectric modulus d11 values (6.21 and 6.92 pC/N) of the LGAS(x=0.9) and LTGA(x=0.5) crystals were slightly larger than that of the pure LGS and La3Ta0.5Ga5.5O14 (LTG) ones (6.08 and 6.89 pC/N), respectively. The LTGA(x=0.5) crystals showed the lowest temperature dependence of d11. The electric resistivity ρ values of the Al-substituted crystals at 400 o C were significantly higher than those of the pure LGS and LTG crystals grown in an oxygen-containing atmosphere. The aluminum substitution is effective for improving the electrical properties of the LGS and LTG, and the LTGA(x=0.5) crystals are suitable for combustion pressure sensor materials.\",\"PeriodicalId\":302030,\"journal\":{\"name\":\"IEEE Ultrasonics Symposium, 2005.\",\"volume\":\"81 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2005-09-18\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"38\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"IEEE Ultrasonics Symposium, 2005.\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/ULTSYM.2005.1602915\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"IEEE Ultrasonics Symposium, 2005.","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ULTSYM.2005.1602915","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Effective substitution of aluminum for gallium in langasite-type crystals for a pressure sensor use at high temperature
Aluminum-substituted La3Ga5SiO14 (LGS)-type crystals, La3Ga5-xAlxSiO14 (LGAS(x)) and La3Ta0.5Ga5.5-xAlxSiO14 (LTGA(x)), were successfully grown by the Czochralski technique. These crystals were 18-23 mm in diameter and 70-100 mm in length. The piezoelectric modulus d11 values (6.21 and 6.92 pC/N) of the LGAS(x=0.9) and LTGA(x=0.5) crystals were slightly larger than that of the pure LGS and La3Ta0.5Ga5.5O14 (LTG) ones (6.08 and 6.89 pC/N), respectively. The LTGA(x=0.5) crystals showed the lowest temperature dependence of d11. The electric resistivity ρ values of the Al-substituted crystals at 400 o C were significantly higher than those of the pure LGS and LTG crystals grown in an oxygen-containing atmosphere. The aluminum substitution is effective for improving the electrical properties of the LGS and LTG, and the LTGA(x=0.5) crystals are suitable for combustion pressure sensor materials.
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