2006 Fiscal Year Final Research Report Summary
Improvement of ultrahigh-temperature calorimeter and precise measurements for heat capacity
| Project/Area Number |
17560596
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | Nagoya University |
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Principal Investigator |
ARITA Yuji Nagoya Univ, EcoTopia Sci.Inst, Associate Prof., エコトピア科学研究所, 助教授 (50262879)
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| Co-Investigator(Kenkyū-buntansha) |
MATSUI Tsuneo Nagoya Univ., Grad.School of Engn., Prof., 大学院工学研究科, 教授 (90135319)
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| Project Period (FY) |
2005 – 2006
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| Keywords | Specific Heat Capacity / Ceramics / High Temperature Property / Phase Transition |
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| Research Abstract |
Improvements of direct heating pulse calorimeter (DHPC) have done. Details is shown below as :
(1) maximum measurement temperature up to 2000 K
(2) improve the precision
(3) expansion of measuring objects
To heat up to 2000 K, the material of main heater was changed from tantalum to carbon composite (C/C). To avoid the reaction between thermocouple and sample at high temperatures, a pyrometer was considered a good for the contactless temperature sensor. We studied the performance of a multi wave pyrometer to decide an absolute temperature exactly. However the time resolution of the multi wave pyrometer was not fast enough. Therefore the high-speed single wave pyrometer was used at the same time with the multi wave pyrometer.
It had been difficult to measure heat capacities of the high resistant sample and/or small samples with DHPC. In this study a sample of Sr(Zr,Y)O_3 which had a electrical conductivity about 11.3×10^<-6>Sm^<-1> was tried to measure heat capacity and indicated successful result. Meanwhile, the heat capacity for a small sample of HfHx (1mm×1mm×15mm) could be measured.
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Research Products
(2 results)
