摘要
研究采用硝酸-磷酸混合酸加热溶解碳化钨样品,使用国产玻璃纤维膜收集样品中的游离碳颗粒,建立了国产玻璃纤维膜收集-红外吸收法测定碳化钨中游离碳的分析方法。考察了样品溶解方法、过滤材料、助熔剂用量等几个关键因素对测定结果的影响,并进行了精密度实验和准确度实验。结果表明,在仪器最佳工作状态下,采用钢标校正曲线,通过对碳化钨标准样品进行测定,游离碳测定结果与标准值基本一致,该方法的相对标准偏差小于1.5%(n=11)。该方法操作简便、试剂用量少、测定结果准确、安全系数高、耗材成本低,可满足日常分析要求,也适合碳化钨粉末规模化生产过程的质量控制。
In this study,a mixed acid of nitric and phosphoric acid was used to digest tungsten carbide samples at high temperature,and domestic glass fiber membrane was used to collect free carbon particles in the samples.The domestic glass fiber membrane collection-infrared absorption method was established for the determination of free carbon in tungsten carbide.The influence of several key factors such as dissolution method,filtering materials,and flux dosage on the determination results was investigated,and precision and accuracy tests were conducted.Under the best working condition of the instrument,the calibration curve of steel standard was used to measure the standard samples.The measured results are basically consistent with the standard values.The relative standard deviation(RSD)was less than 1.5%(n=11).The experimental results show that this method is simple,reagent-efficient,accurate and reliable,safe,and cost-effective,fulfilling routine analytical requirements and suitable for quality control in large-scale tungsten carbide powder production.Overall,this method has been successfully applied to the determination of free carbon content in tungsten carbide.
作者
林丽君
尤斯亮
陈焕涛
LIN Lijun;YOU Siliang;CHEN Huantao(Guangdong Xianglu Tungsten Industry Co.,Ltd.,Chaozhou 515633,Guangdong,China)
出处
《中国钨业》
CAS
2024年第2期86-90,共5页
China Tungsten Industry
基金
林丽君,尤斯亮,陈焕涛(广东翔鹭钨业股份有限公司,广东潮州515633)。
关键词
碳化钨
游离碳
国产玻璃纤维膜
红外吸收法
tungsten carbide
free carbon
domestic glass fiber membrane
infrared absorption method
