.png){kind=icon}
返回
Differential Thermal Analysis Using High Temperature Susceptibility Instruments
.png){kind=icon}
OA
AI
DOI：10.1029/2021JB023789.png)
.png){kind=icon}
.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
Measurements of susceptibility as a function of temperature are an important, standard method of quantifying a sample's magnetic mineralogy. These measurements are used to identify the Curie/Neel temperatures of constituent minerals and show evidence of thermally induced oxidation and formation of magnetic minerals. For these reasons, the High Temperature Susceptibility Bridge (HTSB) is a common instrument in paleomagnetism laboratories around the world. Here, we argue that HTSBs can be used to perform simple differential thermal analysis, a technique used to identify phase transitions and exo-/endothermic reactions by measuring deviations in temperature from a steady heating rate. Because HTSBs are designed to heat samples at a relatively constant rate, the standard susceptibility measurement can be used to obtain similar information, albeit crude, about the phase transitions taking place. For standard samples of vivianite, goethite, and maghemite, we compare the heating curves of the sample and a blank run, to identify DTA-analogous information. In the case of goethite and vivianite, the reactions identified do not have a corresponding expression in susceptibility, demonstrating that this approach expands the utility of this common piece of equipment. We estimate the minimum enthalpy of reactions detectable and their mass dependence. Additionally, we show that this approach is successful in detecting the dehydration of vivianite in a mixed mineralogy natural sample.
Keyword:
high temperature susceptibility bridge
differential thermal analysis
magnetic minerals
AI总结
对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。
期刊
J
IF:
4.1
论文数:
1.4W
被引数:
6.4W
机构
暂无机构信息
引用论文
Southern African ancient genomes estimate modern human divergence to 350,000 to 260,000 years ago.png)
ScienceOAAI
ScienceIF0
OAAI分享收藏THE NEW PARADIGM OF RECOVERY FROM SCHIZOPHRENIA: CULTURAL CONUNDRUMS OF IMPROVEMENT WITHOUT CURE
OAAI
OAAI分享收藏Focused Electron Beam Micro- and Nanopatterning of Thin Films Derived from Sol–Gels Based on TiO2 Precursors for Planar Photonics基于TiO2前驱体的溶胶-凝胶薄膜的聚焦电子束微纳图形化用于平面光子学OAAI
OAAI分享收藏
查看更多内容