{"title":"Investigation of Surface and Bulk Electrical Resistance of Pressureless Sintered AlN–50 wt % SiC Composites","authors":"V. I. Chasnyk, D. V. Chasnyk, O. M. Kaidash","doi":"10.3103/S1063457625010034","DOIUrl":null,"url":null,"abstract":"<p>This study examines the electrical resistance of pressureless sintered ceramic composites of AlN–50 wt % SiC, which are suitable for use as bulk microwave radiation absorbers. For four groups of samples with quality factors <i>Q</i> = 30, 33, 37, and 44, the average surface resistances are 42, 64, 92, and 136 kΩ, respectively, while the average bulk resistances are 2.8, 4.1, 5.2, and 7.0 kΩ, respectively. An analysis of the experimental data revealed a correlation between surface and bulk electrical resistance. In general, higher bulk resistance corresponds to higher surface resistance. Moreover, as the quality factor increases from 30 to 44, the surface resistance exceeds the bulk resistance by factors ranging from 14.7 to 19.5.</p>","PeriodicalId":670,"journal":{"name":"Journal of Superhard Materials","volume":"47 1","pages":"39 - 45"},"PeriodicalIF":1.2000,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of Superhard Materials","FirstCategoryId":"88","ListUrlMain":"https://link.springer.com/article/10.3103/S1063457625010034","RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
This study examines the electrical resistance of pressureless sintered ceramic composites of AlN–50 wt % SiC, which are suitable for use as bulk microwave radiation absorbers. For four groups of samples with quality factors Q = 30, 33, 37, and 44, the average surface resistances are 42, 64, 92, and 136 kΩ, respectively, while the average bulk resistances are 2.8, 4.1, 5.2, and 7.0 kΩ, respectively. An analysis of the experimental data revealed a correlation between surface and bulk electrical resistance. In general, higher bulk resistance corresponds to higher surface resistance. Moreover, as the quality factor increases from 30 to 44, the surface resistance exceeds the bulk resistance by factors ranging from 14.7 to 19.5.
期刊介绍：
Journal of Superhard Materials presents up-to-date results of basic and applied research on production, properties, and applications of superhard materials and related tools. It publishes the results of fundamental research on physicochemical processes of forming and growth of single-crystal, polycrystalline, and dispersed materials, diamond and diamond-like films; developments of methods for spontaneous and controlled synthesis of superhard materials and methods for static, explosive and epitaxial synthesis. The focus of the journal is large single crystals of synthetic diamonds; elite grinding powders and micron powders of synthetic diamonds and cubic boron nitride; polycrystalline and composite superhard materials based on diamond and cubic boron nitride; diamond and carbide tools for highly efficient metal-working, boring, stone-working, coal mining and geological exploration; articles of ceramic; polishing pastes for high-precision optics; precision lathes for diamond turning; technologies of precise machining of metals, glass, and ceramics. The journal covers all fundamental and technological aspects of synthesis, characterization, properties, devices and applications of these materials. The journal welcomes manuscripts from all countries in the English language.
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