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(output started at /www/wwwroot/www.ekeyan.com/system/framework.php:44) in /www/wwwroot/www.ekeyan.com/system/storage/modification/catalog/controller/startup/startup.php on line 182 八通道量热仪

八通道量热仪

¥200.00

  • 型号: TAM Air
  • 商品库存: 有现货
  • 销量: 1

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测试简介

水泥与水作用放出的热,称为水化热,以焦/克(J/g)表示。一般来说,水泥的水化过程从heat evolution rate 的角度来讲,可以分为三个阶段:第一阶段可以称为dormant period,在初始时刻,水泥颗粒和水接触并反应,放热率很快,但是由于石膏的存在,在水泥粒子的表面会形成一层钝化模,使放热率降低,第二阶段可以称为phase-boundary reaction阶段,这一阶段水泥水化热释放率最快,水泥颗粒也随之增长很快,第三阶段可以称为diffusion control 阶段,水泥的水化产物在水泥粒子的表面堆积的厚度逐渐增厚,水泥的水化放热率逐渐降低,这个时候的反应由扩散控制。

样品要求

样品量要求:固体50g,配浆后体积大于300mL

收费标准

1)    200元/样起,每增加一天加80元(不足一天按一天算) 2)    样品多的话可以适当优惠

分析仪器

仪器名称:八通道等温量热仪 仪器型号:TAM Air 仪器厂家:TA仪器 TAM Air热活性微量热仪 是TA仪器出品的一款八通道微量热仪,用于测量灵敏而稳定的热流。是水泥和混凝土的制造和准备过程中进行新的配方的研发,或者进行质量控制的理想工具。而对于一些大样品测量且需要毫瓦级灵敏度的测量,TAM Air热活性微量热仪也同样适用。TAM Air的使用温度范围是5-90°C。恒温槽使用循环空气作为介质,通过个上等的调节系统来确保温度的稳定性(波动小于± 0.02 K)。恒温槽的高准确性和稳定性使得量热计可以进行连续长时间(几个星期)的热流测量。

仪器技术参数

恒温槽性能参数 量热通道:8 温度范围: 5 - 90°C 恒温槽类型 :空气介质 恒温槽准确度: ± 0.2°C 检测限: 4 µW 准确度: ± 20 µW >24小时基线 漂移 :< 40 µW 偏离 :< ± 10 µW 误差: < ± 23 µW 短期基线 :< ± 2.5 µW

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