足彩跟单app


浅析差示扫描量热法测比热容

2017-07-31  浏览量:1534

足彩跟单appLAIYUAN:MEIXINJIANCE  ZUOZHE:GONGCHENGSHI

 

1、什么是比热容?

ZAIHENGDINGDEQIYAXIA,DANWEIZHILIANGDEYANGPINWENDUSHENGGAO1KSUOXISHOUDERELIANG。

 

2、该方法依据什么原理?

将试样与一已知比热容的标准物质(蓝宝石,主要成分为Al2O3足彩跟单app)在其他条件相同下进行温度(线性增大)扫描,然后量出二者的纵坐标(DSC信号),根据下列公式进行计算。 

 

GONGSHI:

美信检测     

 

YOUCIKEDE:

美信检测   

 

美信检测

Figure 1 典型DSC图[1]

 

足彩跟单appXIANHOUJINXINGSANCICESHI:KONGBAICESHI、LANBAOSHICESHIYUSHIYANGCESHI。MEIYITIAOYOUYANGPINDEDSCXIANDOUYAOJIANQUKONGBAICESHIQUXIAN,ZAIYONGSHIYANGCESHIQUXIANDSCXINHAOYUYIZHIDELANBAOSHIDSCXINHAOJINXINGBIJIAO。

足彩跟单app1WEIKONGBAIGANGUOSHIYAN,2WEILANBAOSHIXIAOZHUNSHIYAN,3WEISHIYANGSHIYAN。

 

足彩跟单appBIAO1  LANBAOSHIBUTONGWENDUXIADEBIRERONG

温度/(K) 400 410 420 430 440 450 460
比热容/(J/g·K) 0.9423 0.9544 0.966 0.977 0.9875 0.9975 1.007
温度/(K) 470 480 490 500 510 520 530
比热容/(J/g·k) 1.016 1.025 1.033 1.0408 1.0484 1.0556 1.0626

 

YOUBIAOKEZHIZAIMOUWENDUQUJIANNEILANBAOSHIDEBIRERONGZHIHENWENDING。

RUTU,ZONGZUOBIAODEZHIJIWEISHANGSHIZHONGDEDSC/(mW/mg),HENGZUOBIAOWEIWENDU/℃(JUEDUILINGDU0K=   -273.15℃,SHENGGAO1KJISHENGGAO1℃,SUOYI273.15K=0℃)

 

3、相关标准

足彩跟单appISO 11357-4:2014,GB/T 19466.4-2016YIJIASTM E1269-11。

 

4、实验仪器

差示扫描量热仪(Differential Scanning Calorimeter,简称DSC),型号DSC 214,配套人工蓝宝石圆片(α-Al2O3),铝制坩埚以及液氮制冷系统等。

 

5、适用范围

ZAISHIYANGUOCHENGZHONGDEWENDUFANWEINEIBUFASHENGXIANGBIANYUHUAXUEFANYINGDEGUTIHUOZHEYETI。

 

6、蓝宝石法测试要求

足彩跟单appGANGUOXUANZE:SANTAOYOUGAIGANGUO,GANGUOCAIZHIWEICHUNAl。BUTONGYANGPINGANGUOZHILIANGYINGJINKENENGXIANGTONG,ZONGZHILIANGPIANCHABUCHAOGUO0.1mg。

YANGPINYAOQIU:ZAICESHIGUOCHENGZHONGWUXIANGBIANYUHUAXUEFANYING。

实验要求:对仪器所给的恒温下热流对时间(或温度)的基线斜率进行调整 , 使等温基线Ⅰ和Ⅱ处于同一条水平线上[2];

足彩跟单app  

由于实验中存在各种影响因素导致测试结果不够精确,根据上述测试要求中所列的内容提出以下可能存在的影响因素:

1、RECHUANDAOCHADESHIYANGWUCHAJIAODA。YINCIJINLIANGJIANXIAOGAIZHONGLEIDESHIYANGTIJIHUOZHEZHILIANG,HAIKETONGGUOSHIDANGJIANGDISHENGWENSULV,SHISHIYANGCHONGFENSHOURE;

2、MEIDUANCESHIDUANZHANGDUBUYICHAOGUO200℃,YUEXIAOYUEHAO,GUOZHANGKEFENDUAN,ZHONGJIANBAOCHISHUFENZHONGDENGWENZHUANGTAI;

足彩跟单app3、GANGUOZHILIANGBUTONG。GANGUOZHILIANGBUTONGHUIDAOZHIQIGONGZUOJIXIANXIAOZHUNYOUWU,HUOZHESHIBIAOZHUNYANGPINYUSHIYANGDEDSCXIANCUNZAIWUCHA,YINCIJINLIANGSHISHIYANZHONGDEGANGUOZHILIANGDOUXIANGTONG;

足彩跟单app4、SHIYANGYULANBAOSHIZHILIANGBUYIXIANGCHAGUODA,FOUZEYOUKENENGSHIJIEGUOCHANSHENGJIAODAWUCHA;

5、确保试样与蓝宝石在坩埚中以及坩埚在炉池中的位置都在正中央,否则蓝宝石偏离坩埚中心将可能导致测定结果偏大[3]

 

7、参考文献

[1] GB/T 19466.4-2016 SULIAO CHASHISAOMIAOREFA(DSC) DI4BUFEN:BIRERONGDECEDING[S]

足彩跟单app[2] LIWENBODENG,CHASHISAOMIAOLIANGREYICEDINGBIRERONGFANGFADEGAIJIN,GAODENGXUEXIAOHUAXUEXUEBAO[J],2005,26:2310-2313

[3] ZHANGYUHUADENG,DSCFACEDINGRUNHUAYOUCHANPINBIRERONGYINGXIANGYINSUDEYANJIU,SHIYOUSHANGJI,2013,31(4):72-75

  • 联系我们
  • SHENZHENMEIXINZONGBU

    REXIAN:400-850-4050

    YOUXIANG:marketing@bixinshuma.com

     

    SUZHOUMEIXIN

    REXIAN:400-118-1002

    足彩跟单appYOUXIANG:marketing@bixinshuma.com

     

    BEIJINGMEIXIN

    REXIAN:400-850-4050

    足彩跟单appYOUXIANG:marketing@bixinshuma.com

     

    DONGGUANMEIXIN

    REXIAN:400-116-1002

    YOUXIANG:marketing@bixinshuma.com

     

    GUANGZHOUMEIXIN

    足彩跟单appREXIAN:400-850-4050

    YOUXIANG:marketing@bixinshuma.com

     

    ZHUHAIMEIXIN

    REXIAN:400-850-4050

    YOUXIANG:marketing@bixinshuma.com

人才招聘 | 网站地图

友情链接: 美信检测 | | | | |

SHENZHENSHIMEIXINJIANCEJISHUGUFENYOUXIANGONGSI-DISANFANGCAILIAOJIANCE BANQUANSUOYOU

微信