Characterization of magnesium phosphate cement fabricated using pre-reacted magnesium oxide
| Autor: | Na Song, Li-jing Bai, Ai-juan Wang, Jun-ming Li, Rui He, Yang Song, Xiao-jie Fan |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Exothermic reaction
Magnesium phosphate Reaction mechanism Materials science Magnesium Mechanical Engineering Metallurgy 0211 other engineering and technologies Metals and Alloys chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Microstructure Chemical engineering chemistry immune system diseases Mechanics of Materials Impurity visual_art 021105 building & construction Materials Chemistry visual_art.visual_art_medium Ceramic 0210 nano-technology Curing (chemistry) |
| Zdroj: | Journal of Alloys and Compounds. 696:560-565 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2016.11.278 |
| Popis: | Magnesium phosphate cement (MPC) has the potential to be used as biomaterials but the high level of heat being generated during this exothermic reaction limits its use. It is very important to control the curing behavior of MPC. MPC was fabricated using pre-reacted magnesium oxide as raw materials in this paper. Pre-reacted magnesium oxide was fabricated according to the hydrated reaction mechanism of MPC. Curing behavior, phase compositions and microstructure of MPC were characterized, as well as the chemical activity of pre-reacted magnesium oxide. The results indicated that pre-reacted magnesium oxide was composed of residual magnesium oxide and hydrated products. The mean particles size increased as the hydrated products united magnesium oxide together to form bigger clusters; meanwhile the chemical activity decreased. The setting time and peak temperature of MPC was adjusted successfully, and the phase compositions are still same with those of MPC obtained by pure magnesium oxide. The phase compositions of MPC fabricated with different pre-reacted magnesium oxide particles were all composed of hydrated products and residual magnesium oxide. No observable impurity ensures the purity of MPC. The whole synthesis process of MPC in this work is composed of two stages. The first stage is to obtain pre-reacted magnesium oxide, and the second is to fabricate MPC using magnesium oxide obtained in the first stage. Both stages are designed according to the hydrated reaction mechanism of MPC, and thus ensure the purity of MPC. In conclusion, the curing behavior was successfully controlled, producing a same phase compositions to that of the MPC whilst causing the changes in the setting time and peak temperature. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect