Interaction between strontium sulfate and boric acid at high temperatures in the presence of activated charcoal
Gumushane Universitesi Fen Bilimleri Dergisi, cilt.16, sa.4, ss.1117-1128, 2026 (Scopus, TRDizin)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 16 Sayı: 4
- Basım Tarihi: 2026
- Doi Numarası: 10.17714/gumusfenbil.1924998
- Dergi Adı: Gumushane Universitesi Fen Bilimleri Dergisi
- Derginin Tarandığı İndeksler: Scopus, TR DİZİN (ULAKBİM)
- Sayfa Sayıları: ss.1117-1128
- Anahtar Kelimeler: Activated Charcoal, Boric Acid, Celestine, Strontium metaborate, Strontium sulfate
- Açık Arşiv Koleksiyonu: AVESİS Açık Erişim Koleksiyonu
- Karadeniz Teknik Üniversitesi Adresli: Evet
Özet
In this study, the interaction between strontium sulfate (SrSO4) and boric acid (H3BO3), both in the absence and presence of activated charcoal (C), was investigated at high temperatures using an SrSO4:H3BO3 molar ratio of 1:2, which corresponds to the stoichiometric composition of strontium metaborate (SrB2O4). It was found that in the absence of C, SrSO4 and H3BO3 did not interact to form SrB2O4 upon heating at either 1073 K and 1273 K, probably due to the very high thermal stability of SrSO4. In contrast, in the presence of C, heating at 1073 K resulted in the formation of minor amounts of strontium borate phases, such as SrB6O10 and SrB4O7, whereas the SrB2O4 phase was formed upon heating at 1273 K. The formation of SrB2O4 was further confirmed by Fourier transform infrared spectroscopy analysis. Furthermore, when reagent-grade SrSO4 was replaced with natural SrSO4 (celestine) in the starting mixture containing H3BO3 and C, the formation of SrB2O4 was also achieved at 1273 K. Because of the promising results obtained for strontium metaborate, this study should be extended for the preparation other strontium and alkaline earth metal (i.e., Ca) borates from corresponding naturally abundant sulfates that are usually not preferred as the starting compounds in high-temperature solid-state synthesis studies.