燃烧合成氮化硅粉体的性能一致性评价方法和应用  

Consistency of Silicon Nitride Powders Produced by Combustion Synthesis:Evaluation and Application

作　　者：李宏华 东婉茹 王良 杨增朝[1] 李江涛[1] LI Honghua;DONG Wanru;WANG Liang;YANG Zengchao;LI Jiangtao(Key Laboratory of Cryogenics,Technical Institute of Physics and Chemistry,Chinese Academy of Sciences,Beijing 100190,China;Institute of Optical Physics and Engineering Technology,Qilu Zhongke,Jinan 250000,China)

机构地区：[1]中国科学院理化技术研究所,低温重点实验室,北京100190 [2]齐鲁中科光物理与工程技术研究院,济南250000

出　　处：《无机材料学报》2023年第10期1169-1175,I0001,I0002,共9页Journal of Inorganic Materials

基　　金：国家重点研发计划(2022YFE0201200,2017YFB0310303)。

摘　　要：陶瓷粉体的批次稳定性是陶瓷制品生产商最关心的核心指标,却又长期无据可依。本研究以燃烧合成的氮化硅粉体为样本,量化评价不同批次生产的氮化硅粉体的相似程度。首先构建了涵盖静态理化指标、动态流动性指标的粉体性能评价参数体系,进而测试得到在该参数体系中氮化硅粉体的全部性能数据,随后对所得性能数据分别采用余弦相似度法和欧氏距离法进行计算,得到了粉体性能一致性评价数据。结果表明,基于该参数体系的余弦相似度和欧氏距离均能反映批次粉体间的相似程度,量化显示出不同批次粉体的差异,两种方法的计算结果相互验证。对判定为不相似的粉体,追溯工艺流程中的差异找到了控制氮化硅粉体一致性的关键环节—原料硅粉;对判定为高度相似的粉体划分为同类,为不同批次氮化硅粉体的类别划分提供了量化依据。该工作建立的“粉体性能一致性评价体系”为氮化硅粉体产品质量的批次稳定性(性能一致性)提供了有效的评价手段和量化依据。The batch stability of ceramic powders is a core indicator that manufacturers of ceramic products are most concerned about,yet has long been undocumented.In this study,the similarity of Si3N4 powders produced in different batches was quantitatively evaluated by taking combustion-synthesized Si3N4 powders as the sample.A system of powder performance evaluation parameters covering static physicochemical and dynamic flowability indices was firstly constructed.Then,all performance data of Si3N4 powders in this parameter system were retested.Subsequently,the consistency evaluation data of Si3N4 powders were obtained using the cosine similarity method and the Euclidean distance method.The results show that both methods based on this parameter system can reflect the similarity between batches of powders and quantitatively show the differences between them.Calculation results of the two methods are mutually verified.For powders judged to be dissimilar,differences in the process were traced to find the key link in the consistency between the Si3N4 powders and the raw silicon powders.For powders judged to be highly similar,they were classified as the same class.These study provides a quantitative basis for the classification of different batches of silicon nitride powders.The“Powder Consistency Evaluation System”established in this work presents an effective evaluation tool and quantitative basis for batch stability(performance consistency)of silicon nitride powder.

关 键 词：一致性评价 氮化硅粉体 余弦相似度 欧氏距离 

分 类 号：TQ174[化学工程—陶瓷工业]