Study of the mechanical and chemical properties of potassium manganese phosphate glasses

Abstract

Abstract. Homogeneous phosphate glasses having the general formula 20K 2 O-xMnO-(80-x)P 2 O 5 were synthesized using a melt-quenching method. The amorphous nature of the samples was asserted by X-ray diffraction. The glasses are studied in order to evaluate the influence of MnO addition on the chemical and mechanical properties, such as, dissolution rate, average compressive strength (Rc), Young's modulus (E) and limit strain (Ɛ lim ). Some studies show that the addition of MnO significantly reduces the degradation rate (D R ) of soluble phosphate glasses and enhanced chemical stability of both alkali-resistance and acid-resistance. MnO interfere with the chemical structure of the glass, and consequently improve their mechanical properties. Indeed, the mechanical measurements showed that the glass structure was modified by the addition of MnO oxide, becoming more rigid, and as a result, increasing the compressive strength (Rc), Young's modulus (E). These new materials could be an important opportunity for applications in the fields of building, construction, civil engineering, etc…

Alteration on the chemical durability of tellurite glass: effect of heat treatment

“…The experiment was performed in room temperature. The weight loss (W L ) was calculated using the following equation [8][9][10]13,14]:…”

“…The NBO forms a weak bond connected to the glass network [28]. Therefore, higher concentration of NBO in the glass network facilitates the dissolution of glass in aqueous solution [10,23].…”