Mechanical properties of natural hydroxyapatite using low cold compaction pressure: Effect of sintering temperature

Obada, David O.; Dauda, E.T.; Abifarin, Johnson Kehinde; Dodoo‐Arhin, David; Bansod, Naresh D.

doi:10.1016/j.matchemphys.2019.122099

Cited by 100 publications

(79 citation statements)

References 75 publications

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“…The Ca/P ratio seems to deviate from the theoretical value for pure stoichiometric HA at this range of temperature and it does not follow a specific pattern. This might be because the sintering temperature affects the type and composition of the calcium based apatites that form 48 . The higher values of Ca/P ratio at 900°C and 1200°C is due to the carbonate ion exchange in the HA structure at higher temperature 49 .…”

Section: Resultsmentioning

confidence: 99%

“…This might be because the sintering temperature affects the type and composition of the calcium based apatites that form. 48 The higher values of Ca/P ratio at 900°C and 1200°C is due to the carbonate ion exchange in the HA structure at higher temperature. 49 This is confirmed by the XRD and FTIR results which confirm that carbonate ions are not present at these temperatures.…”

Section: Edxmentioning

confidence: 97%

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Comparative analysis and antibacterial properties of thermally sintered apatites with varied processing conditions

et al. 2020

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Biological waste holds a major portion of the municipal waste stream, particularly in rural areas of developing countries. According to the Food and Agriculture Organization of the United Nations (FAO), every year there are 1.3 billion tons of food waste produced and around one-third of all food produced for human consumption are being wasted. 1 Amongst the other sources, the livestock industry (fish and poultry industry) has a vital contribution. Some biological

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Section: Resultsmentioning

confidence: 99%

Section: Edxmentioning

confidence: 97%

Comparative analysis and antibacterial properties of thermally sintered apatites with varied processing conditions

et al. 2020

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“…Many investigations have been done to promote the progresses in this field. Nowadays, some bulk hydroxyapatite materials with excellent mechanical properties are obtained through many methods [ 117 , 118 , 119 , 120 ]. S.J.…”

Section: The Coalescence Of Materials For Functional Applicationsmentioning

confidence: 99%

Construction of Inorganic Bulks through Coalescence of Particle Precursors

2021

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Bulk inorganic materials play important roles in human society, and their construction is commonly achieved by the coalescence of inorganic nano- or micro-sized particles. Understanding the coalescence process promotes the elimination of particle interfaces, leading to continuous bulk phases with improved functions. In this review, we mainly focus on the coalescence of ceramic and metal materials for bulk construction. The basic knowledge of coalescent mechanism on inorganic materials is briefly introduced. Then, the properties of the inorganic precursors, which determine the coalescent behaviors of inorganic phases, are discussed from the views of particle interface, size, crystallinity, and orientation. The relationships between fundamental discoveries and industrial applications are emphasized. Based upon the understandings, the applications of inorganic bulk materials produced by the coalescence of their particle precursors are further presented. In conclusion, the challenges of particle coalescence for bulk material construction are presented, and the connection between recent fundamental findings and industrial applications is highlighted, aiming to provide an insightful outlook for the future development of functional inorganic materials.

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“…The processed powder was subjected to varying sintering temperatures: 900°C, 1000°C, and 1100°C. Hence the resulting data yielded three variants of the XRD samples; a detailed description of the data and their respective mechanical properties are explained by Obada et al 15,16 The illustration of the synthesis of HAp and crystallographic evaluation protocol is shown in Figure 1.…”

Section: Datasetmentioning

confidence: 99%

“…From the described figures, the boundary condition for the experiments can be drawn; (1) all the X‐ray reflections intensities are mapped to the angular bounds (Bragg Angles) in the range [5°, 90°]. (2) The reflection intensity levels for the HAp variants depends on the sintering temperature which tailors the crystallinities of the HAp powders 15,16 . For instance, XRD analysis for the raw sample (no heat treatment) yields lower reflection intensity, but when subjected to sintering temperature with step‐wise increment, yields higher RI.…”

Section: Datasetmentioning

confidence: 99%

Prediction of the reflection intensity of natural hydroxyapatite using generalized linear model and ensemble learning methods

Okafor

Obada

Ibrahim

et al. 2020

Engineering Reports

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Laboratory data acquisition and analysis of X‐ray diffraction (XRD) data involves a lot of tedious human engineering and is time‐consuming. To put in context, a summation of the material synthesis procedure leading to the analysis of the structure of the material can span several days. To curb this challenge and to enhance innovations in engineering pedagogy, this article investigates an alternative method that uses supervised learning algorithms based on ensemble techniques and a generalized linear model (GLM) for predicting reflection intensity (XRD patterns) of raw and natural hydroxyapatite under varying sintering temperature conditions given Bragg angles as input to the machine learning algorithms. For the experiment, we trained GLM and ensemble learning models (CatBoost, LightGBM, and two variants of XGBoost based on manual and genetic algorithm for tuning of the hyperparameters). The results show that most instances of the XGBoost yielded a robust performance that surpasses all other approaches, when predicting X‐ray reflection intensities ascribed to the biomaterials subjected to varying sintering temperature conditions. In addition, the results show that all the ensemble techniques significantly outperform the GLM, this indicates that the former exhibits better generalization capacity. The ensemble learning techniques and the GLM presents a reduced computational complexity.

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Mechanical properties of natural hydroxyapatite using low cold compaction pressure: Effect of sintering temperature

Cited by 100 publications

References 75 publications

Comparative analysis and antibacterial properties of thermally sintered apatites with varied processing conditions

Comparative analysis and antibacterial properties of thermally sintered apatites with varied processing conditions

Construction of Inorganic Bulks through Coalescence of Particle Precursors

Prediction of the reflection intensity of natural hydroxyapatite using generalized linear model and ensemble learning methods

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