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  • QA:DTA vs DSC
    QA:DTA vs DSC
    2018-09-15

    Difference Between DSC and DTA .(From netzsch-thermal-analysis) According to DIN 51 007, differential thermal analysis (DTA) is suited for the determination of characteristic temperatures, while differential scanning calorimetry (DSC) additionally allows for the determination of caloric values such as the heat of fusion or heat of crystallization. This can be done with two different measuring techniques: heat-flux differential scanning calorimetry or power-compensated differential scanning calorimetry. Since all  DSC instruments are based on the heat-flux principle, only this method will be discussed in more detail in the following sections. For both DTA and heat-flux DSC, the primary measuring signal during a measurement is the temperature difference between a sample and reference in µV (thermal voltage). For DSC, this temperature difference can be converted into a heat-flux difference in mW by means of an appropriate calibration. This possibility does not exist for a purely DTA instrument. More info of DSC and DTA sample pan ,Please visit :https://www.csceramic.com

  • QA:what does dsc mean ?
    QA:what does dsc mean ?
    2018-09-12

    what does dsc mean ? Differential scanning calorimetry, or the differential scanning calorimeter。 Differential scanning calorimetry, or DSC, is a thermoanalytical technique in which the difference in the amount of heat required to increase the temperature of a sample and reference is measured as a function of temperature. Both the sample and reference are maintained at nearly the same temperature throughout the experiment. Generally, the temperature program for a DSC analysis is designed such that the sample holder temperature increases linearly as a function of time. The reference sample should have a well-defined heat capacity over the range of temperatures to be scanned. The technique was developed by E. S. Watson and M. J. O'Neill in 1962,[1] and introduced commercially at the 1963 Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy. The first adiabatic differential scanning calorimeter that could be used in biochemistry was developed by P. L. Privalov and D. R. Monaselidze in 1964 at Institute of Physics in Tbilisi, Georgia.[2] The term DSC was coined to describe this instrument, which measures energy directly and allows precise measurements of heat capacity.[3] Detection of phase transitions The basic principle underlying this technique is that when the sample undergoes a physical transformation such as phase transitions, more or less heat will need to flow to it than the reference to maintain both at the same temperature. Whether less or more heat must flow to the sample depends on whether the process is exothermic or endothermic. For example, as a solid sample melts to a liquid, it will require more heat flowing to the sample to increase its temperature at the same rate as the reference. This is due to the absorption of heat by the sample as it undergoes the endothermic phase transition from solid to liquid. Likewise, as the sample undergoes exothermic processes (such as crystallization) less heat is required to raise the sample temperature. By observing the difference in heat flow between the sample and reference, differential scanning calorimeters are able to measure the amount of heat absorbed or released during such transitions. DSC may also be used to observe more subtle physical changes, such as glass transitions. It is widely used in industrial settings as a quality control instrument due to its applicability in evaluating sample purity and for studying polymer curing.[4][5][6] DTA An alternative technique, which shares much in common with DSC, is differential thermal analysis (DTA). In this technique it is the heat flow to the sample and reference that remains the same rather than the temperature. When the sample and reference are heated identically, phase changes and other thermal processes cause a difference in temperature between the sample and reference. Both DSC and DTA provide similar information. DSC measures the energy required to keep both the reference and the sample at the same temperature whereas DTA measures the difference in temperature between the sample and the reference when the same amount of energy has been introduced into both. DSC curves Top: A schematic DSC curve of amount of energy input (y) required to maintain each temperature (x), scanned across a range of temperatures. Bottom: Normalized curves setting the initial heat capacity as the reference. Buffer-buffer baseline (dashed) and protein-buffer variance (solid). Normalized DSC curves using the baseline as the reference (left), and fractions of each conformational state (y) existing at each temperature (right), for two-state (top), and three-state (bottom) proteins. Note the minuscule broadening in the peak of the three-state protein's DSC curve, which may or may not appear statistically significant to the naked eye. The result of a DSC experiment is a curve of heat flux versus temperature or versus time. There are two different conventions: exothermic reactions in the sample shown with a positive or negative peak, depending on the kind of technology used in the experiment. This curve can be used to calculate enthalpies of transitions. This is done by integrating the peak corresponding to a given transition. It can be shown that the enthalpy of transition can be expressed using the following equation: where \Delta H is the enthalpy of transition,K is the calorimetric constant, andA is the area under the curve. The calorimetric constant will vary from instrument to instrument, and can be determined by analyzing a well-characterized sample with known enthalpies of transition.[5] Applications Differential scanning calorimetry can be used to measure a number of characteristic properties of a sample. Using this technique it is possible to observe fusion and crystallization events as well as glass transition temperatures Tg. DSC can also be used to study oxidation, as well as other chemical reactions.[4][5][7] Glass transitions may occur as the temperature of an amorphous solid is increased. These transitions appear as a step in the baseline of the recorded DSC signal. This is due to the sample undergoing a change in heat capacity; no formal phase change occurs.[4][6] As the temperature increases, an amorphous solid will become less viscous. At some point the molecules may obtain enough freedom of motion to spontaneously arrange themselves into a crystalline form. This is known as the crystallization temperature (Tc). This transition from amorphous solid to crystalline solid is an exothermic process, and results in a peak in the DSC signal. As the temperature increases the sample eventually reaches its melting temperature (Tm). The melting process results in an endothermic peak in the DSC curve. The ability to determine transition temperatures and enthalpies makes DSC a valuable tool in producing phase diagrams for various chemical systems.[4] Examples The technique is widely used across a range of applications, both as a routine quality test and as a research tool. The equipment is easy to calibrate, using low melting indium at 156.5985 °C for example, and is a rapid and reliable method of thermal analysis. Polymers DSC is used widely for examining polymeric materials to determine their thermal transitions. The observed thermal transitions can be utilized to compare materials, although the transitions do not uniquely identify composition. The composition of unknown materials may be completed using complementary techniques such as IR spectroscopy. Melting points and glass transition temperatures for most polymers are available from standard compilations, and the method can show polymer degradation by the lowering of the expected melting point, Tm, for example. Tm depends on the molecular weight of the polymer and thermal history, so lower grades may have lower melting points than expected. The percent crystalline content of a polymer can be estimated from the crystallization/melting peaks of the DSC graph as reference heats of fusion can be found in the literature.[8] DSC can also be used to study thermal degradation of polymers using an approach such as Oxidative Onset Temperature/Time (OOT), however, the user risks contamination of the DSC cell, which can be problematic. Thermogravimetric Analysis (TGA) may be more useful for decomposition behavior determination. Impurities in polymers can be determined by examining thermograms for anomalous peaks, and plasticisers can be detected at their characteristic boiling points. In addition, examination of minor events in first heat thermal analysis data can be useful as these apparently "anomalous peaks" can in fact also be representative of process or storage thermal history of the material or polymer physical aging. Comparison of first and second heat data collected at consistent heating rates can allow the analyst to learn about both polymer processing history and material properties. Liquid crystals DSC is used in the study of liquid crystals. As some forms of matter go from solid to liquid they...

  • Guide to TGA Pan Selection-TA sample pan ,Platinum pan ,Aluminum pan ,Ceramic Alumina
    Guide to TGA Pan Selection-TA sample pan ,Platinum pan ,Aluminum pan ,Ceramic Alumina
    2018-09-12

    Guide to TGA Pan Selection-TA sample pan ,Platinum pan ,Aluminum pan ,Ceramic Alumina TA sample pan for TA  instruments for thermal analysis differential scanning calorimetry . Vedio details : Item details : Alumina Sample cups & Aluminum Sample cups &Platinum sample pan for TA Instruments. CS Ceramic is manufacturer that researches various Thermal Analysis DSC and STA TGA Consumables  sample pans and crucibles for TA thermal analyzer with 30 years of production history. Tzero Aluminum Sample Pans/lids 901670.901/901671.901 for TA Instruments ( Sample Cups) TA Tzero 901670.901/901671.901 Aluminum Sample Pans for TA Instruments T Zero low mass Q20/Q200 .Manufacturer for TA crucibles and DSC sample pans .TA Instruments good alternative sample cups . Premium pans/Tzero Pans 901683.901/901684.901 for TA Instruments ( Sample Cups) TA Tzero Liquid sample test Aluminum Sample Pans and lids for TA Instruments T Zero Q20/Q200 .Manufacturer for TA crucibles and DSC sample pans .TA Instruments good alternative sample cups . TA 901683.901/901684.901 Tzero Aluminum Sample Pans/lids 901683.901/901671.901 for TA Instruments ( Sample Cups) TA Tzero Solid sample test Aluminum Sample Pans for TA Instruments T Zero Q20/Q200 .Manufacturer for TA crucibles and DSC sample pans .TA Instruments good alternative sample cups . TA 901683.901/901671.901 Standard Hermetic aluminum sample pan/lid 900793.901/ 900794.901 for TA Instruments ( Sample Cups) TA 900793.901/ 900794.901 TA Liquid sample test Aluminum Sample Pans for TA Instruments  Q100/Q10 .Manufacturer for TA crucibles and DSC sample pans .TA Instruments good alternative sample cups . Standard Aluminum Sample Pans w/lid 900786.901/900779.901 for TA Instruments ( Sample Cups) TA Solid sample test Aluminum Sample Pans for TA Instruments  Q100/Q10 .Manufacturer for TA crucibles and DSC sample pans .TA Instruments good alternative sample cups . TA 900786.901/900779.901 . 100µL Platinum-HT Sample Pans H:10.6mm PN: 957571.901 for TA Instruments ( Sample Cups) TA 100μl 957571.901  Platinum/Pt Crucibles Platinum/Pt Sample Pans for TA Instruments TA TGA Q5000 IR Sample Pans .Manufacturer for TA crucibles and DSC sample pans .TA Instruments good alternative sample cups . 100µL Platinum/Pt Crucibles H:16.6mm PN: 952018.906 for TA Instruments (Sample Pans) TA 100μl 952018.906  Platinum/Pt Crucibles Platinum/Pt Sample Pans for TA Instruments  TA Q500 / Q50/TGA 2950/2050 .Manufacturer for TA crucibles and DSC sample pans .TA Instruments good alternative sample cups . 100µL Ceramic Sample Pan with Platinum/Pt handle for TA Instruments (Alumina Crucibles) 100µL Ceramic Sample Pan with Platinum/Pt handle (OEM height)  Ceramic Sample Pans for TA Instruments SDT Q600 .Manufacturer for TA crucibles and DSC sample pans .TA Instruments good alternative sample pans . 100μl Ceramic Sample Pans (Special H:16.5MM)) 952018.907 for TA Instruments (Alumina Crucible) TA 100μl 952018.907  Alumina crucibles (OEM handle)  Ceramic Sample Pans for TA Instruments TA Q500/Q50 TGA 2950/2050 .Manufacturer for TA crucibles and DSC sample pans .TA Instruments good alternative sample pans . 100μl Ceramic Sample Pans 952018.907 for TA Instruments (Alumina Crucible) TA 100μl 952018.907  Alumina crucibles (standard handle)  Ceramic Sample Pans for TA Instruments TA Q500/Q50 TGA 2950/2050 .Manufacturer for TA crucibles and DSC sample pans .TA Instruments good alternative sample pans . 40μl Alumina Sample Cups/Lids 960070.901/960239.901 for TA Instruments (Sample pans) ta 960070.901/960239.901 40μl Alumina crucibles sample cups for TA Instruments SDT Q600/SDT 2960 .Manufacturer for  TA crucibles and DSC sample pans .TA Instruments good alternative sample pans . 90μl Premium Alumina Cups/Lids 960070.901/960239.901 for TA Instruments (Sample pans) TA 960070.901/960239.901 90μl Alumina crucibles sample cups for TA Instruments SDT Q600/SDT 2960 .Manufacturer for  TA crucibles and DSC sample pans .TA Instruments good alternative sample pans . 90μl Premium alumina sample cups 960070.901/ 961060.901 for TA Instruments (Sample pans) TA 960070.901/ 961060.901 Alumina crucibles sample pans for TA Instruments SDT Q600/SDT 2960 .Manufacturer for  TA crucibles and DSC sample pans .TA Instruments good alternative sample pans . Graphite Crucible w/Lids D6.5*4mm for TA Instruments ( Sample Cups) TA Graphite Crucibles D6.5*4mm Sample Pans and lids for TA Instruments  .Manufacturer for TA crucibles and DSC sample pans .TA Instruments good alternative sample cups . Tzero Low-Mass Pans 901670.901 for TA Instruments ( Sample Cups) TA Tzero 901670.901 Aluminum Sample Pans for TA Instruments T Zero Q20/Q200 .Manufacturer for TA crucibles and DSC sample pans .TA Instruments good alternative sample cups . TA 901670.901 Tzero Hermetic Lids 901684.901 for TA Instruments TA Tzero Liquid Aluminum Sample lids for TA Instruments T Zero Q20/Q200 .Manufacturer for TA crucibles and DSC sample pans .TA Instruments good alternative sample cups . TA901684.901 Tzero Premium lids 901671.901 for TA Instruments TA Tzero Solid sample test Aluminum Sample lids for TA Instruments T Zero Q20/Q200 .Manufacturer for TA crucibles and DSC sample pans .TA Instruments good alternative sample cups . TA 901671.901 Premium pans/Classic Aluminum Pans/Tzero Pans 901683.901 for TA Instruments ( Sample Cups) TA Tzero Solid &Liquid sample test  Aluminum Sample Pans for TA Instruments T Zero Q20/Q200 .Manufacturer for TA crucibles and DSC sample pans .TA Instruments good alternative sample cups . TA 901683.901 Standard Hermetic aluminum sample lids 900794.901 for TA Instruments ( Sample Cups) TA Liquid sample test Aluminum Sample lids for TA Instruments  Q100/Q10 .Manufacturer for TA crucibles and DSC sample pans .TA Instruments good alternative sample cups . TA 900794.901 Standard Hermetic aluminum sample pan 900793.901for TA Instruments ( Sample Cups) TA Liquid sample test Aluminum Sample Pans for TA Instruments  Q100/Q10 .Manufacturer for TA crucibles and DSC sample pans .TA Instruments good alternative sample cups . TA 900793.901 Standard Aluminum Sample lids 900779.901 for TA Instruments ( Sample lids) TA Solid sample test Aluminum Sample lids for TA Instruments  Q100/Q10 .Manufacturer for TA crucibles and DSC sample pans .TA Instruments good alternative sample cups . 900779.901 . Standard Aluminum Sample Pans 900786.901 for TA Instruments ( Sample Cups) TA Solid sample test Aluminum Sample Pans for TA Instruments Q100/Q10 .Manufacturer for TA crucibles and DSC sample pans .TA Instruments good alternative sample cups .TA 900786.901 OEM Platinum-Hangdown Wire 952040.901 for TA Instruments TA L89mm 952040.901 Platinum-Hangdown Platinum/Pt Crucibles Platinum/Pt Sample Pans for TA Instruments Hangdown Wire (Tare Q5000IR/Discovery TGA:sample Q500/50) .Manufacturer for TA crucibles and DSC sample pans .TA Instruments good alternative sample cups . OEM PT/ Platinum crucible w/lid D6.5mm for TA Instruments ( Sample Cups) TA D6.5mm Platinum/Pt Crucibles Platinum/Pt Sample

  • CS Ceramic obtained certificate issued by CCPIT-China Council
    CS Ceramic obtained certificate issued by CCPIT-China Council
    2018-06-25

    To promote our international business, CS Ceramic has applied, and obtained certificate issued by CCPIT-China Council for the Promotion of International Trade and CCOIC-China Chamber of International Commerce.

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