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In this paper, it is introduced the determination of oxygen content in lanthanum-iron alloy with the pulse melting-infrared absorption method. The preparation method and optimal analysis conditions are determined by studying the preparation methods of sample as well as analyzing the effects of power, weighing sample and flux on determination results of oxygen content. The standard deviation is less than 5% and recovery rate is 95%~105% for this method, so it is with good precision and accuracy.
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文章采用脉冲熔融-红外吸收法对镧铁合金中的氧含量进行测定。通过研究样品制备的方法和分析功率、称样量、助熔剂对氧含量测定结果的影响,确定了制备方法和最佳分析条件。通过对样品重复测定及加标回收实验,该方法标准偏差小于5%,回收率在95%~105%,具有良好的精密度和准确度。
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刘钢耀(1973-),男,内蒙古包头市人,高级工程师,现从事冶金材料化学分析研究工作。
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刘钢耀(1973-),男,内蒙古包头市人,高级工程师,现从事冶金材料化学分析研究工作。
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刘钢耀(1973-),男,内蒙古包头市人,高级工程师,现从事冶金材料化学分析研究工作。
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18(6):24-26., articleTitle=氧化镧碳化行为的研究, refAbstract=null)], funds=null, companyList=[AuthorCompany(id=1187122781683597689, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1185882040932119504, xref=null, ext=[AuthorCompanyExt(id=1187122781691986298, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1185882040932119504, companyId=1187122781683597689, language=EN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=Technical Center of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010,Inner Mongolia Autonomous Region, China), AuthorCompanyExt(id=1187122781696180603, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1185882040932119504, companyId=1187122781683597689, language=CN, country=null, province=null, city=null, postcode=null, companyName=null, departmentName=null, remark=内蒙古包钢钢联股份有限公司技术中心,内蒙古 包头 014010)])], figs=[ArticleFig(id=1187122783952716233, tenantId=1146029695717560320, journalId=1185652524569653253, articleId=1185882040932119504, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
| 样品编号 | 直接钻取 | 手工剪切 | 机械加工 |
| 1# | 0.064 | 0.021 | 0.022 |
| 2# | 0.042 | 0.011 | 0.015 |
| 3# | 0.036 | 0.007 5 | 0.008 0 |
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采用不同样品制备方法的氧含量测定结果(质量分数) %
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| 样品编号 | 直接钻取 | 手工剪切 | 机械加工 |
| 1# | 0.064 | 0.021 | 0.022 |
| 2# | 0.042 | 0.011 | 0.015 |
| 3# | 0.036 | 0.007 5 | 0.008 0 |
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| 称样量/g | 氧含量/% | 极差/% | 相对标准偏差/% | 熔体及峰形 |
| 0.2~0.4 | 0.006 2 | 0.001 0 | 8.8 | 熔体平滑,峰形对称 |
| 0.4~0.6 | 0.006 3 | 0.000 8 | 5.6 | 熔体平滑,峰形对称 |
| 0.6~0.8 | 0.005 8 | 0.000 9 | 12.5 | 熔体有溢出,峰形不对称 |
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称样量的选择实验
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| 称样量/g | 氧含量/% | 极差/% | 相对标准偏差/% | 熔体及峰形 |
| 0.2~0.4 | 0.006 2 | 0.001 0 | 8.8 | 熔体平滑,峰形对称 |
| 0.4~0.6 | 0.006 3 | 0.000 8 | 5.6 | 熔体平滑,峰形对称 |
| 0.6~0.8 | 0.005 8 | 0.000 9 | 12.5 | 熔体有溢出,峰形不对称 |
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| 功率/W | 氧含量/% | 相对标准偏差/% | 熔体及峰形 |
| 3 000 | 0.008 0 | 15.2 | 熔体平滑,峰形出现双峰 |
| 3 500 | 0.009 5 | 10.6 | 熔体平滑,峰形不对称 |
| 4 000 | 0.011 | 8.9 | 熔体平滑,峰形不对称 |
| 4 500 | 0.013 | 7.3 | 熔体平滑,峰形对称 |
| 5 000 | 0.013 | 6.5 | 熔体平滑,峰形对称 |
| 5 500 | 0.012 | 12.6 | 熔体有飞溅现象,峰形不对称 |
| 6 000 | 0.012 | 15.6 | 熔体有飞溅现象,峰形不对称 |
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不同功率氧含量测定结果
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| 功率/W | 氧含量/% | 相对标准偏差/% | 熔体及峰形 |
| 3 000 | 0.008 0 | 15.2 | 熔体平滑,峰形出现双峰 |
| 3 500 | 0.009 5 | 10.6 | 熔体平滑,峰形不对称 |
| 4 000 | 0.011 | 8.9 | 熔体平滑,峰形不对称 |
| 4 500 | 0.013 | 7.3 | 熔体平滑,峰形对称 |
| 5 000 | 0.013 | 6.5 | 熔体平滑,峰形对称 |
| 5 500 | 0.012 | 12.6 | 熔体有飞溅现象,峰形不对称 |
| 6 000 | 0.012 | 15.6 | 熔体有飞溅现象,峰形不对称 |
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| 助熔剂 | 氧含量/% | 释放情况 | 干扰情况 | 效果评价 |
| 无 | 0.000 55 | 不对称,拖尾 | 熔体不光滑,污染严重 | 差 |
| 镍囊 | 0.007 5 | 峰形对称 | 熔体发乌,污染较少 | 较好 |
| 锡囊 | 0.003 8 | 峰形不对称,拖尾 | 熔体发亮,污染较大 | 差 |
| 镍囊+锡片 | 0.009 0 | 峰形对称平滑 | 熔体光滑发亮,污染较少 | 良好 |
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助熔剂选择实验
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| 助熔剂 | 氧含量/% | 释放情况 | 干扰情况 | 效果评价 |
| 无 | 0.000 55 | 不对称,拖尾 | 熔体不光滑,污染严重 | 差 |
| 镍囊 | 0.007 5 | 峰形对称 | 熔体发乌,污染较少 | 较好 |
| 锡囊 | 0.003 8 | 峰形不对称,拖尾 | 熔体发亮,污染较大 | 差 |
| 镍囊+锡片 | 0.009 0 | 峰形对称平滑 | 熔体光滑发亮,污染较少 | 良好 |
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| 样品编号 | 氧含量 | 平均值 | SD | RSD |
| 1# | 0.012 5,0.013 0,0.012 7,0.012 5,0.013 2,0.012 1 | 0.012 7 | 0.000 39 | 3.1 |
| 2# | 0.006 8,0.006 6,0.006 7,0.006 8,0.006 5,0.006 6 | 0.006 7 | 0.000 12 | 1.8 |
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精密度实验结果%
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| 样品编号 | 氧含量 | 平均值 | SD | RSD |
| 1# | 0.012 5,0.013 0,0.012 7,0.012 5,0.013 2,0.012 1 | 0.012 7 | 0.000 39 | 3.1 |
| 2# | 0.006 8,0.006 6,0.006 7,0.006 8,0.006 5,0.006 6 | 0.006 7 | 0.000 12 | 1.8 |
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| 样品编号 | 测定值 | 加标量 | 测定总量 | 回收率 |
| 1# | 0.012 5 0.013 2 | 0.012 0 0.012 0 | 0.025 1 0.024 9 | 105 98 |
| 2# | 0.006 8 0.006 7 | 0.012 0 0.012 0 | 0.019 1 0.018 2 | 102 96 |
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方法的回收率%
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| 样品编号 | 测定值 | 加标量 | 测定总量 | 回收率 |
| 1# | 0.012 5 0.013 2 | 0.012 0 0.012 0 | 0.025 1 0.024 9 | 105 98 |
| 2# | 0.006 8 0.006 7 | 0.012 0 0.012 0 | 0.019 1 0.018 2 | 102 96 |
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