építôanyag § Journal of Silicate Based and Composite Materials Investigation of mineralogical composition and technological properties of conventional brick clays láSzló a. GömzE § institute of ceramics and Polymer engineering, university of miskolc § femgomze@uni-miskolc.hu Sergei n. KulKoV § institute of strength Physics and materials science sB rAs, national research tomsk state university § kulkov@ms.tsc.ru eMeSe KuRoVIcS § institute of ceramics and Polymer engineering, university of miskolc § fememese@uni-miskolc.hu aleS S. BuyAKoV § institute of strength Physics and materials science sB rAs, national research tomsk state university § alesbuyakov@gmail.com Svetlana p. BuyAKoVA § institute of strength Physics and materials science of rAs, tomsk state university § sbuyakova@ispms.ru alexandr y BuzImoV § institute of strength Physics and materials science sB rAs, national research tomsk state university § buzimov92@gmail.com róbert GéBER § institute of ceramics and Polymer engineering, university of miskolc § femgeber@uni-miskolc.hu MiHail v. GRIGoRIEV § institute of strength Physics and materials science of rAs, tomsk Polytechnic university § grv@ispms.ru iStván KocSERHA § institute of ceramics and Polymer engineering, university of miskolc § istvan.kocserha@uni-miskolc.hu alekSey S. KulKoV § institute of strength Physics and materials science sB rAs, national research tomsk state university tatiana yu. SABlINA § institute of strength Physics and materials science of rAs § sabtat@ispms.ru nikolai l. SAVcHENKo § institute of strength Physics and materials science of rAs § savnick@ispms.ru irina n. SEVoSTyANoVA § institute of strength Physics and materials science of rAs § sevir@ispms.ru andrea SImoN § institute of ceramics and Polymer engineering, university of miskolc § femandi@uni-miskolc.hu érkezett: 2018. 01. 15. § received: 15. 01. 2018. § https://doi.org/10.14382/epitoanyag-jsbcm.2018.2 Abstract in this research the layers of a Hungarian conventional brick clay deposit were examined both on material and mineralogical structures and compositions as well as on technological properties. During their examination the authors have found that the volumes of X-ray amorphous submicron and nano particles of the conventional brick clays do not influence on the dry sensitivity of the extruded and formed green products. the authors have found also a strong correlation between the X-ray amorphous nano particles of raw materials and the bending strengths of the sintered ceramics. As more the volumes of submicron and nano particles are in the conventional brick clays as higher are the bending strengths of the produced from them sintered ceramics. keywords: bending strength, bricks, clays, drying, minerals, roof tiles, shrinkage, X-ray diffraction lászló A. GömzE, is establisher and professor of the Department of ceramics and silicate engineering in the university of miskolc, Hungary. He is author or coauthor of 2 patents, 6 books and more than 300 scientific papers. recently, he is the chair of the international organization Board of ic-cmtp5 the 5th international conference on competitive materials and technological Processes (2018). sergei N. KulKov, is professor of the tomsk state university and head of Department of ceramics in the institute of strength Physics and materials science of the russian Academy of science since 1989. His research works are represented in 5 books, more than 150 articles, 18 patents and many international symposiums and conferences. At present he is head of department „theory of strength and mechanic of solids”, member of „the American ceramic society” of „the APmi - international” and the Dym At society (France). Emese Kurovics, is graduated in the university of miskolc, Department of ceramics and silicate engineering as a material engineer, where she actually continues her study as PhD student under supervision of Prof. L. A. Gömze. Ales s. BuyAKov, is graduated in the national research tomsk Polytechnic university, as an engineer and he actually continues his study as PhD student under supervision of Prof. s. n. kulkov in the institute of strength Physics and materials science sB rAs. svetlana P. BuyAKovA, is Doctor of sciences since 2008, full Professor since 2013. she is specialist in material sciences of ceramic and ceramic matrix composites based on oxides and carbides. she is author and co-author of more than 100 papers. now, she is chief scientist in is Pms rAs and professor in tomsk state university and tomsk Polytechnic university. Her teaching experience: introduction to materials science, Fundamentals of materials engineering, materials and their applications. Alexandr y. Buzimov, is graduated in the national research tomsk state university, as an engineer physic and he actually continues his study as PhD student under supervision of Prof. s. n. kulkov in the institute of strength Physics and materials science sB rAs. róbert GéBEr, is graduated in the university of miskolc and has PhD since 2013. At present he is lecturer at the institute of ceramics and Polymer engineering in university of miskolc. mihail v. GriGoriEv, has PhD since 2007. At present time he is a post-doctoral fellow in institute of strength Physics and materials science of siberian Branch of the russian Academy of science under guidance Prof. kulkov. istván KocsErhA, is graduated in the university of miskolc and has PhD since 2010. At present he is associate professor and chair of the Department of ceramics and silicate engineering (Dcse) in university of miskolc (Hungary). He is author or co- author of 35 articles and 1 Hungarian patent. Aleksey s. KulKov, is physicist and has got PhD scientific degree at tomsk state university in russian Federation. At present he is working as research fellow at institute of strength Physics and materials science of the russian Academy of sciences in tomsk. 8 | építôanyag § JSBCM § 2018/1 § vol. 70, no. 1 Tatiana yu. sABliNA, has PhD education since 1989 at present she is working at the tomsk state university and institute of strength Physics and materials science of the russian Academy of sciences in tomsk. Nikolai l. sAvchENKo, PhD education: 1987: tomsk Polytechnic universityengineer.1991-1994: institute of strength Physics and materials science of the russian Academy of sciences in tomsk - PhD student. 1995: PhD.degree from the institute of strength Physics and materials science of the russian Academy of sciences in tomsk. irina N. sEvosTyANovA, PhD education: 1987: tomsk Polytechnic universityengineer.1993-1996: institute of strength Physics and materials science of the russian Academy of sciences in tomsk - PhD student. 2001: PhD.degree from the institute of strength Physics and materials science of the russian Academy of sciences in tomsk. Field of research: structure and mechanical property of porous ceramics based zirconia and alumina. Andrea simoN, is graduated in the university of miskolc and has PhD since 2010. At present she is associate professor of the Department of ceramics and silicate engineering (Dcse) in university of miskolc (Hungary).