14 KB1658 KB14 KB200020242000Mirtič, BredaPlanjšek, Mojcaštevilka:1/2letnik:344 stranistr. 113-116ISSN:1580-2949COBISSID:217258URN:URN:NBN:SI:doc-7PEE31IRslInštitut za kovinske materiale in tehnologijeMateriali in tehnologijedodatkiglinastrukturažganjeDoločanje strukture glinenega oblikovanca z optičnim mikroskopom| Identification of the clay body structure by the optical microscope|Plastic clay is used for manufacturing of the building ceramic. Low amounts of different mineral components are added in order to optimize the manufacturig process and to modify the properties as well as the product image. Results of the investigations of the fired clay bodies are presented in the article. The clay bodies were fired in the oxidation and in the reduction atmosphere at different temperatures. Different amounts of grog, ?$MnO_2$?, ?$TiO_2$?, quartz and fritta were added. Investigations of the thin and polished sections of the fired bodies by optical microscope proved the existence of black cores as well as a relationship between porosity, the firing temperature and the amount of the fritta added. In addition, a partial melting of the added mineral components and the influence of the added mineral components on the microscopic image of the clay product was also provedZa izdelavo gradbene keramike uporabljamo v Sloveniji plastično glino, ki da po žganju rdečo črepinjo. Za optimizacijo sestave mase glede procesa izdelave oblikovanca, žganja ter za doseganje spreminjanja končnih lastnosti in videza izdelka uporabljajo proizvajalci različne dodatke. V sestavku so predstavljeni rezultati preiskav glinenih oblikovancev po žganju v oksidacijski in redukcijski atmosferi pri različnih končnih temperaturah z dodatki opečnega zdroba, ?$MnO_2$?, ?$TiO_2$?, kremenovega peska in frite. S preiskavo v presevni in odsevni svetlobi smo dokazali nastanek črnih jeder, zmanjševanje poroznosti v odvisnosti od končne temperature in dodane frite, delno taljenje posameznih zrn dodatkov ter vpliv na mikroskopski videz izdelkaTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaInštitut za kovinske materiale in tehnologije