{"title":"高温传感器用钛酸钐(Sm2Ti2O7)材料","authors":"P. Sivagnanapalani, P.K. Panda","doi":"10.1016/j.sintl.2022.100200","DOIUrl":null,"url":null,"abstract":"<div><p>Samarium titanate (Sm<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub>) is a perovskite layered structure (PLS) material with high Curie temperature (T<sub>C</sub> ≥ 1247 °C). Sm<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> (STO) powders were synthesized by solid state reaction method by calcining the constituent powders at 1100 °C for 2 h. The average crystallite size of calcined STO powder was measured to be 61 nm. Circular discs of STO samples were sintered between the temperature range 1250–1450 °C with a soaking time of 2 h and sintered density was highest (>96.35% Th.) for the samples sintered at 1450 °C. The direct current electrical resistivity linearly decreased from 10<sup>13</sup> to 10<sup>6</sup> Ω.cm during its increase in temperature from 100 to 900 °C. The activation energy of the STO samples were 0.38 ± 0.01 eV (Ea<sub>1</sub>) and 1.77 ± 0.01 eV (Ea<sub>2</sub>) at temperature ranges 100 to 400 °C and 500 to 900 °C, respectively. Hence, samarium titanate is a promising sensor material for high-temperature applications.</p></div>","PeriodicalId":21733,"journal":{"name":"Sensors International","volume":"3 ","pages":"Article 100200"},"PeriodicalIF":0.0000,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.sciencedirect.com/science/article/pii/S2666351122000456/pdfft?md5=f967555f0d7585e75b98c17dd2b08f8b&pid=1-s2.0-S2666351122000456-main.pdf","citationCount":"2","resultStr":"{\"title\":\"Samarium titanate (Sm2Ti2O7) materials for high-temperature sensor applications\",\"authors\":\"P. Sivagnanapalani, P.K. Panda\",\"doi\":\"10.1016/j.sintl.2022.100200\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Samarium titanate (Sm<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub>) is a perovskite layered structure (PLS) material with high Curie temperature (T<sub>C</sub> ≥ 1247 °C). Sm<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> (STO) powders were synthesized by solid state reaction method by calcining the constituent powders at 1100 °C for 2 h. The average crystallite size of calcined STO powder was measured to be 61 nm. Circular discs of STO samples were sintered between the temperature range 1250–1450 °C with a soaking time of 2 h and sintered density was highest (>96.35% Th.) for the samples sintered at 1450 °C. The direct current electrical resistivity linearly decreased from 10<sup>13</sup> to 10<sup>6</sup> Ω.cm during its increase in temperature from 100 to 900 °C. The activation energy of the STO samples were 0.38 ± 0.01 eV (Ea<sub>1</sub>) and 1.77 ± 0.01 eV (Ea<sub>2</sub>) at temperature ranges 100 to 400 °C and 500 to 900 °C, respectively. Hence, samarium titanate is a promising sensor material for high-temperature applications.</p></div>\",\"PeriodicalId\":21733,\"journal\":{\"name\":\"Sensors International\",\"volume\":\"3 \",\"pages\":\"Article 100200\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2022-01-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://www.sciencedirect.com/science/article/pii/S2666351122000456/pdfft?md5=f967555f0d7585e75b98c17dd2b08f8b&pid=1-s2.0-S2666351122000456-main.pdf\",\"citationCount\":\"2\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Sensors International\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S2666351122000456\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Sensors International","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S2666351122000456","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 2
摘要
钛酸钐(Sm2Ti2O7)是一种具有高居里温度(TC≥1247℃)的钙钛矿层状结构(PLS)材料。将Sm2Ti2O7 (STO)粉末在1100℃下煅烧2 h，采用固相反应法制备Sm2Ti2O7 (STO)粉末。煅烧后STO粉末的平均晶粒尺寸为61 nm。烧结温度在1250 ~ 1450℃之间，保温时间为2 h，烧结密度在1450℃时最高，达到96.35% Th。直流电阻率从1013线性下降到106 Ω。在温度从100°C升高到900°C的过程中。在100 ~ 400℃和500 ~ 900℃温度范围内，STO样品的活化能分别为0.38±0.01 eV (Ea1)和1.77±0.01 eV (Ea2)。因此，钛酸钐是一种很有前途的高温传感器材料。
Samarium titanate (Sm2Ti2O7) materials for high-temperature sensor applications
Samarium titanate (Sm2Ti2O7) is a perovskite layered structure (PLS) material with high Curie temperature (TC ≥ 1247 °C). Sm2Ti2O7 (STO) powders were synthesized by solid state reaction method by calcining the constituent powders at 1100 °C for 2 h. The average crystallite size of calcined STO powder was measured to be 61 nm. Circular discs of STO samples were sintered between the temperature range 1250–1450 °C with a soaking time of 2 h and sintered density was highest (>96.35% Th.) for the samples sintered at 1450 °C. The direct current electrical resistivity linearly decreased from 1013 to 106 Ω.cm during its increase in temperature from 100 to 900 °C. The activation energy of the STO samples were 0.38 ± 0.01 eV (Ea1) and 1.77 ± 0.01 eV (Ea2) at temperature ranges 100 to 400 °C and 500 to 900 °C, respectively. Hence, samarium titanate is a promising sensor material for high-temperature applications.
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