高温比热容测试常见问题及误差分析

焦阳; 刘春凤; 王晓鹏; 孙昭媛; 余建新

doi:10.16495/j.1006-3757.2022.02.007

高温比热容测试常见问题及误差分析

doi: 10.16495/j.1006-3757.2022.02.007

焦阳^{1, 2,},
刘春凤^{1, 2},
王晓鹏^{1, 2},
孙昭媛^{1, 2},
余建新¹

1.
哈尔滨工业大学分析测试与计算中心, 黑龙江哈尔滨 150001
2.
哈尔滨工业大学材料科学与工程学院, 黑龙江哈尔滨 150001

基金项目:

国家自然科学青年基金 51901056

详细信息

作者简介:
焦阳(1990-), 女, 工学博士, 工程师, 从事热分析仪器的维修维护和功能开发, E-mail: jiaoyang@hit.edu.cn

中图分类号: TH831⁺.4
计量
- 文章访问数: 422
- HTML全文浏览量: 382
- PDF下载量: 29
- 被引次数: 0
出版历程
- 收稿日期: 2022-03-22
- 修回日期: 2022-04-26
- 网络出版日期: 2022-07-07
- 刊出日期: 2022-06-30

Common Problems and Error Analysis of High-Temperature Specific Heat Capacity Tests

JIAO Yang^{1, 2
,},
LIU Chun-feng^{1, 2},
WANG Xiao-peng^{1, 2},
SUN Zhao-yuan^{1, 2},
YU Jian-xin¹

1.
Center for Analysis, Measurement and Computing, Harbin Institute of Technology, Harbin 150001, China
2.
School of Materials Science and Engineering, Harbin Institute of Technology, Harbin 150001, China

Funds:

National Natural Science Foundation of China 51901056

摘要

摘要: 介绍了同步热分析仪(STA449F3)测试高温比热容过程中的常见问题及误差分析. 采用差示扫描量热三步法测试高温比热容. 试验结果表明, 提高仪器的稳定性和升温速率可减小比热测试值与理论值之间的误差. 此外, 将常规一段升温测试分割成若干个窄温区间, 提高了高温比热容测试的准确性.
- 同步热分析仪 /
- 差示扫描量热法 /
- 高温比热容 /
- 三步法 /
- 误差分析
Abstract: The common problems and causations for errors during high-temperature specific heat capacity tests by the simultaneous thermal analyzer (STA449F3) were analyzed. The specific heat capacity was tested using a three-step method with differential scanning calorimetry. The results showed that the errors between confirmed and tested values can be decreased by improving the instrument stability and heating rate. Furthermore, if the conventional one-stage temperature rising test was divided into several narrow temperature ranges, then the accuracy of high-temperature specific heat capacity tests was improved.
- simultaneous thermal analyzer /
- differential scanning calorimetry /
- high-temperature specific heat capacity /
- three-step method /
- error analysis

HTML全文

图 1 蓝宝石标样(sapphire)和金属铜(Cu)比热容测试结果

(a) 蓝宝石标样重复性测试，(b)(c) 蓝宝石和Cu三步法测试结果，(d) 蓝宝石和Cu的比热容结果

Figure 1. Results of specific heat capacity of sapphire and Cu samples

(a) repeatability tests of standard sapphire samples, (b)(c) results of sapphire and Cu samples tested by three-step method, (d) specific heat capacity of sapphire and Cu samples

下载: 全尺寸图片幻灯片

图 2 蓝宝石标样(sapphire)比热容测试结果

(a) 蓝宝石标样重复性测试，(b) 蓝宝石标样比热容理论值和测试值

Figure 2. Results of specific heat capacity of standard sapphire samples

(a) repeatability tests of standard sapphire samples, (b) theoretical and test results of sapphire

下载: 全尺寸图片幻灯片

图 3 提高升温速率后测试的蓝宝石标样(sapphire)比热容

Figure 3. Specific heat capacity of standard sapphire sample tested by increasing heating rate

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图 4 采用分段和未分段两种方法测试蓝宝石标样(sapphire)的比热容结果

Figure 4. Results of specific heat capacity of standard sapphire samples tested by segmented and unsegmented methods

下载: 全尺寸图片幻灯片

表 1 蓝宝石标样的比热容理论值与测试值对比结果

Table 1. Comparison of theoretical and test values of specific heat capacity of standard sapphire samples

温度/℃	理论值/[J/(g·K)]	测试值/[J/(g·K)]	误差/%
50	0.825	0.866	5.0
80	0.876	0.899	2.6
100	0.907	0.914	0.8
120	0.934	0.943	1.0
150	0.970	0.986	1.6
180	1.001	1.017	1.6

下载: 导出CSV

表 2 提高升温速率后，蓝宝石标样的比热容理论值与测试值对比结果

Table 2. Comparison of theoretical and test values of standard sapphire samples tested by increasing heating rate

温度/℃	理论值/[J/(g·K)]	测试值/[J/(g·K)]	误差/%
50	0.825	0.797	-3.4
80	0.876	0.857	-2.2
100	0.907	0.889	-2.0
120	0.934	0.920	-1.5
150	0.970	0.959	1.1

下载: 导出CSV

表 3 分段方法测试的蓝宝石标样的比热容测试值与理论值对比

Table 3. Comparison of theoretical and test values of standard sapphire sample tested by segmented method

温度/℃	理论值/[J/(g·K)]	测试值/[J/(g·K)]	误差/%
100	0.905	0.889	-1.8
300	1.089	1.081	-0.7
500	1.170	1.145	-2.1
700	1.218	1.178	-3.3
900	1.254	1.220	-2.7
1 100	1.282	1.276	-0.5
1 300	1.305	1.280	-1.9

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