Impact of the cation field strength on physical properties and structures of alkali and alkaline-earth borosilicate glasses

Lv, Zhong-Peng (author): Stockholms universitet,Institutionen för material- och miljökemi (MMK),Lanzhou University, PR China

Wang, Chunting (author)

Stevensson, Baltzar, 1975- (author): Stockholms universitet,Institutionen för material- och miljökemi (MMK)

Yu, Yang, 1987- (author): Stockholms universitet,Institutionen för material- och miljökemi (MMK)

Wang, Tieshan (author)

Edén, Mattias (author): Stockholms universitet,Institutionen för material- och miljökemi (MMK)

(creator_code:org_t)

Elsevier BV, 2022
2022
English.
In: Ceramics International. - : Elsevier BV. - 0272-8842 .- 1873-3956. ; 48:13, s. 18094-18107

Related links:: https://doi.org/10.1...; show more...; https://urn.kb.se/re...; https://doi.org/10.1...; show less...

Abstract Subject headings

The impact of the cation field strength (CFS) of the glass network-modifier cations on the structure and properties of borosilicate glasses (BS) were examined for a large ensemble of mixed-cation (R/2)M(2)O–(R/2)Na2O–B2O3–KSiO2 glasses with M+ ={Li+, Na+, K+, Rb+} and M2+ ={Mg2+, Ca2+, Sr2+, Ba2+} from four series of {K, R} combinations of K = n(SiO2)/n(B2O3) = {2.0, 4.0} and R =[n(M(2)O) + n(Na2O)]/n(B2O3) = {0.75, 2.1}. Combined with results from La3+ bearing glasses enabled the probing of physical-property variations across a wide CFS range, encompassing the glass transition temperature (Tg), density, molar volume and compactness, as well as the hardness (H) and Young's modulus (E). We discuss the inferred composition–structure/CFS–property relationships. Each of Tg, H, and E revealed a non-linear dependence against the CFS and a strong Tg/H correlation, where each property is maximized for the largest alkaline-earth metal cations, i.e., Sr2+ and Ba2+, along with the high-CFS La3+ species. The 11B MAS NMR-derived fractional BO4 populations decreased linearly with the average Mz+/Na+ CFS within both K–0.75 glass branches, whereas the NBO-rich K–2.1 glasses manifested more complex trends. Comparisons with results from RM2O–B2O3–KSiO2 glasses suggested no significant “mixed alkali effect”.

By the author/editor: Lv, Zhong-Peng; Wang, Chunting; Stevensson, Balt ...; Yu, Yang, 1987-; Wang, Tieshan; Edén, Mattias

About the subject

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