Method and apparatus for thermal conductivity measurements
    1.
    发明授权
    Method and apparatus for thermal conductivity measurements 失效
    热导率测量方法和装置

    公开(公告)号:US5335993A

    公开(公告)日:1994-08-09

    申请号:US85646

    申请日:1993-06-30

    摘要: A method and apparatus for measuring the thermal conductivity of materials using modulated differential scanning calorimetry (MDSC). Two MDSC heat capacity measurements are made consecutively. One measurement is made under conditions which ensure obtaining a fairly accurate value for the heat capacity of the material ("quasi-ideal conditions"). Another measurement is made under conditions such that the measured effective heat capacity differs from the accurate value of the heat capacity due to thermal conductivity effects. Generally, the non-ideal conditions differ from the ideal conditions by one parameter, such as the size of the sample, the modulation frequency used to measure the heat capacity, or, for thin films, the presence or absence of a specimen on the thin film. The thermal conductivity of the material is then calculated from the difference between the heat capacity measured under quasi-ideal conditions and the effective heat capacity measured under non-ideal conditions.

    摘要翻译: 使用调制差示扫描量热法(MDSC)测量材料的热导率的方法和装置。 连续进行两次MDSC热容量测量。 在确保获得材料的热容量相当准确的值(“准理想条件”)的条件下进行一次测量。 在使得测量的有效热容量与热导率效应的热容量的精确值不同的条件下进行另一测量。 一般来说,非理想条件通过一个参数(例如样品的尺寸,用于测量热容的调制频率)或理想条件与样品在薄层上的存在或不存在不同 电影。 然后根据在准理想条件下测得的热容与在非理想条件下测得的有效热容之差计算材料的热导率。

    Differential scanning calorimeter
    2.
    发明授权
    Differential scanning calorimeter 有权
    差示扫描量热仪

    公开(公告)号:US06641300B1

    公开(公告)日:2003-11-04

    申请号:US10058025

    申请日:2002-01-29

    IPC分类号: G01K1700

    摘要: A method for calibrating thermal resistance and thermal capacitance parameters characterizing a DSC cell, and then calculating the heat flow to the sample based upon the results of the calibration. The method is applied in a conventional heat flux calorimeter, to obtain thermal analysis data having improved baseline and resolution. A first embodiment is based upon a model of a calorimeter in which there is no cross-talk between the sample and reference sides of a DSC cell. The thermal resistance and thermal capacitance parameters are calculated by carrying out a sequential series of calibration measurements with an empty DSC cell, materials on the reference side and materials on both the sample and reference sides. Another embodiment takes the existence of cross-talk between the sample and reference sides of the calorimeter into account.

    摘要翻译: 用于校准表征DSC单元的热电阻和热电容参数,然后基于校准结果计算到样品的热流的方法。 该方法应用于常规热通量热计中,以获得具有改进的基线和分辨率的热分析数据。 第一实施例基于在DSC单元的样品和参考侧之间没有串扰的量热计的模型。 通过使用空的DSC电池,参考侧的材料和样品和参考侧的材料进行一系列校准测量来计算热电阻和热电容参数。 另一个实施例考虑到量热计的样品和参考侧之间的串扰存在。

    Method and apparatus for AC Differential thermal analysis
    6.
    发明授权
    Method and apparatus for AC Differential thermal analysis 失效
    交流差动热分析方法与装置

    公开(公告)号:US5439291A

    公开(公告)日:1995-08-08

    申请号:US171656

    申请日:1993-12-22

    申请人: Michael Reading

    发明人: Michael Reading

    IPC分类号: G01N25/48 G01N25/00

    摘要: The present invention is a modulated differential thermal analysis technique for determining the composition, phase, structure, identification, or other properties of a material that undergoes a transition as function of temperature or other driving variable. As applied to differential scanning calorimetric analysis (DSC), the preferred embodiment comprises (1) heating a sample of the material with a linear temperature ramp that is modulated with a sinusoidal heating rate oscillation; (2) simultaneously heating a reference at the same linear temperature ramp; (3) measuring the differential temperature of the sample and reference; and (4) deconvoluting the resultant heat flow signal into rapidly and non-rapidly reversible components.

    摘要翻译: 本发明是用于确定作为温度或其他驱动变量的函数的经历转变的材料的组成,相位,结构,识别或其它性质的调制差分热分析技术。 如应用于差示扫描量热分析(DSC),优选实施方案包括(1)用正弦加热速率振荡调制的线性温度斜坡加热材料样品; (2)在相同的线性温度斜坡同时加热参考; (3)测量样品和参考的温差; 和(4)将所得热流信号解卷积成快速且非快速可逆的分量。

    High frequency deflection measurement of IR absorption
    8.
    发明授权
    High frequency deflection measurement of IR absorption 有权
    红外吸收的高频偏转测量

    公开(公告)号:US08001830B2

    公开(公告)日:2011-08-23

    申请号:US11803421

    申请日:2007-05-15

    IPC分类号: G01B5/28 G01N21/84 G01Q80/00

    摘要: An AFM based technique has been demonstrated for performing highly localized IR spectroscopy on a sample surface. Such a technique implemented in a commercially viable analytical instrument would be extremely useful. Various aspects of the experimental set-up have to be changed to create a commercial version. The invention addresses many of these issues thereby producing a version of the analytical technique that cab be made generally available to the scientific community.

    摘要翻译: 已经证明了基于AFM的技术用于在样品表面上进行高度局部化的IR光谱。 在商业可行的分析仪器中实施的这种技术将是非常有用的。 必须改变实验设置的各个方面,以创建商业版本。 本发明解决了许多这些问题,从而产生了一般可用于科学界的驾驶室的分析技术的版本。

    Modulated differential scanning calorimeter solvent loss calibration apparatus and method
    10.
    发明授权
    Modulated differential scanning calorimeter solvent loss calibration apparatus and method 有权
    调制差示扫描量热仪溶剂损失校准装置及方法

    公开(公告)号:US07578613B2

    公开(公告)日:2009-08-25

    申请号:US11853586

    申请日:2007-09-11

    申请人: Michael Reading

    发明人: Michael Reading

    IPC分类号: G01K17/06 G01N25/20

    CPC分类号: G01K17/04 G01N25/48

    摘要: A modulated differential scanning calorimeter that accounts for heat flow due to evaporative solvent loss. The calorimeter modulates the temperature applied to a sample and a reference to determine the amount of heat flow that is due to evaporation. By calculating the amount of heat flow due to evaporation, the user can determine how much of the heat flow of any given well is due to the process of interest as opposed to evaporation.

    摘要翻译: 一种调制的差示扫描量热计,其考虑到蒸发溶剂损失引起的热流。 量热计调节施加到样品和参考物的温度,以确定由于蒸发引起的热流量。 通过计算由于蒸发引起的热流量,用户可以确定任何给定的井的热流量是由于与蒸发相反的感兴趣的过程。