Thermal characteristics and crystallization behavior of zinc borosilicate glasses containing Nb2O5

Autor: João Pedro Veiga, Maria Margarida Rolim Augusto Lima, Andreia A. S. Lopes, Regina da Conceição Corredeira Monteiro

Publikováno v: Journal of Non-Crystalline Solids. 491:124-132

Glasses based on the molar composition 60ZnO·(40-x)B2O3·xSiO2, x = 10 or 20, with small additions of Nb2O5 (2.5, 5, 7.5 and 10 mol%), were prepared by melt-quenching. Increasing the Nb2O5 content decreased the glass transition and softening tempera

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::faa094b1a1ab3d501dd0edf2a87bf5f4
https://doi.org/10.1016/j.jnoncrysol.2018.03.054

Crystallization of lithium disilicate-based multicomponent glasses – effect of silica/lithia ratio

Autor: Maria Margarida Rolim Augusto Lima, Roque Soares, Regina Monteiro, AlessanRSS Reis, Rui Jorge Cordeiro Silva

Publikováno v: Ceramics International. 41:317-324

Two glass compositions were prepared from the system SiO 2 -Li 2 O-K 2 O-ZrO 2 -P 2 O 5 with different SiO 2 /Li 2 O ratio (2.39 and 3.39) and the crystallization behavior was investigated by differential thermal analysis (DTA), X-ray diffraction (XR

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::061b2daa6893ed91e54f7d6dea0aa81d
https://doi.org/10.1016/j.ceramint.2014.08.074

Crystallization kinetics of a barium–zinc borosilicate glass by a non-isothermal method

Autor: Maria Margarida Rolim Augusto Lima, Maria Helena V Fernandes, Roque Soares, Andreia Lopes, Regina Monteiro, AlessanRSS Reis

Publikováno v: Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP

The crystallization kinetics of a glass with a molar composition 40BaO-20ZnO-30B(2)O(3)-10SiO(2) was investigated. The kinetic parameters, activation energy for crystallization (E-c) and Avrami exponent (n), were evaluated under non-isothermal condit

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0958ddb44f2628ad68cf617267d4d0de
https://doi.org/10.1016/j.jallcom.2013.12.086

Quality Improvement of Recycled Aggregates from a Construction and Demolition Waste Recycling Pilot Plant

Autor: Maria Lucelinda Cunha, D. Algarvio, Maria Margarida Rolim Augusto Lima

Publikováno v: Materials Science Forum. :630-635

The construction and demolition wastes (C&DW) frequently are abandoned in private properties, roads, and landfills or collected by non-licensed companies. In Portugal they are few recycling plants operating with this residue, and this work makes the

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::0802bb2df74321ed2952a0c78fc2e5a9
https://doi.org/10.4028/www.scientific.net/msf.730-732.630

Structural, electrical and thermal properties of borosilicate glass–alumina composites

Autor: Maria Margarida Rolim Augusto Lima, Regina Monteiro, Manuel Pedro Graca, Maria Silva, AlessanRSS Reis

Publikováno v: Journal of Alloys and Compounds. 538:66-72

Borosilicate glass–alumina composites with (1 − x ) Glass + x Al 2 O 3 ( x = 0, 5, 10, 25 vol.%) were prepared and the effect of Al 2 O 3 addition on the structural, electrical and thermal characteristics was investigated. XRD patterns revealed t

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ccbb6d9ac6485c4c18ea2cb750d36261
https://doi.org/10.1016/j.jallcom.2012.05.024