Minerālo izejvielu pielietošanas un stikla šķiedras defektu izpēte

Pētītas iespējas izmantot jaunas izejvielas stikla sķiedras ražosanā, īpasu uzmanību pievērsot Latvijas minerālām izejvielām – devona (Bāles atradne) un juras perioda (Skudras atradne un Pīlādžu atradne) kvarca smiltīm. Apstrādājot ūdenī Skudras atradnes kvarca smiltis, krāsojoso oksīdu daudzums samazināts līdz 0,066 %. Iegūto stiklu īpasību pārbaude parādīja attīrīto Skudru atradnes kvarca smilsu izmantosanas perspektīvu E-tipa stikla sķiedras ražosanā. Veikta arī citu sihtas izejvielu izpēte: kolemanīta, kianīta, kaļķakmens. Pielietojot augstas izsķirsanas spējas skenējoso elektronu mikroskopu, diagnosticēti stikla sķiedras defektu rasanās iemesli un izzināta to novērsanas iespēja. Study of Mineral Raw Materials and Defects in Glass Fibres Latvian Devonian period sand from deposit Bāle and Jurassic period sand from deposit Skudra were studied, treated and compared with sand from existing Lithuanian supplier. Investigations of Latvian quartz sand showed that sand is characterized by surface impurities, which are easy to separate combining milling and water purification. These investigations and experimental glass melts using different types of sand confirmed that it is possible to use Latvian refined sand in glass industry. Other glass raw materials – colemanite, kyanite, kaolin, limestone – also have been examined. Glass fibre breakage points were studied using SEM, FTIR and X-Ray diffractions methods. Main reasons of glass fibre breakage are non-homogeneous glass and crystalline or gaseous inclusions coming from corrosion of refractory material. This article is result of the cooperation between Institute of Silicate Materials of Riga Technical University and JSC Valmieras stikla sķiedra. Keywords – glass, glass fibre, raw materials for glass, refined sand, glass defects