Print ISSN: 1681-6900

Online ISSN: 2412-0758

Keywords : Hydroxyapatite

Synthesis and Characterization of Hydroxyapatite Nano materials using chemical method

Suhair Shakir Majeed; Sahar Abdul Aziz Mohammed; Huda Talal Sulaiman; Luma Malak

Engineering and Technology Journal, 2015, Volume 33, Issue 6, Pages 1154-1157

Synthesis natural hydroxyapatite in different nanostructure shapes and sizes such that the toxicity is reduced to the minimum for an individual application. However, the synthesis and functionalization processes are accomplished using chemical method. The morphology of the HAP nanoparticles changes from rod to spherical. Rod shaped particle are found with length between 10-20 nm while the spherical particles are found with radius less than 10 nm. But for the pure HAP only rod morphology observed with the size ranging from 30-60 nm.

Preparation of Biomagnetism Composite Material for Medical Applications

Eman Abdulwahed Othman; Abdulkareem Ibraheem Aboud; Thair Latif Muzel; Abdulsalam Khashan Swadi

Engineering and Technology Journal, 2013, Volume 31, Issue 7, Pages 820-828

The colloidal non-aqueous precipitation method was used to prepare a biocompatible magnetic ceramic–polymer composite [Hydroxyapatite/ Polyvinylachohol (HAP/PVA)] for medical applications. The starting materials used for preparing hydroxyapatite (HAP) were calcium nitrate and diammonium hydrogen phosphate, while the biodegradable polyvinylachohol (PVA) and nanosized iron oxide particles (γ-Fe2O3) were used to generate a biocompatible magnetic gel film. The results showed that the specimens of composite containing up to 30wt% hydroxyapatite didn’t explore any of phase separation; further the incorporated of the ferrite enhanced the affectivity and the stability of the composite. The surface morphology and magnetic properties of the gel films were studied and the magnetization measurements were carried out at 5-300Kº. it showed that no remnant magnetization at 300 Kº, but at 5 Kº hysteretic loop was observed leading to confirm that the superparamagnetic nature of the nanosized maghemite particles didn’t affect in presence of the polymer and its behavior considered as superparamagnetic material.

Preparing and Studying the Effect of HA and ZrO2 Addition on Fracture Strength of Dental Ceramic

Hussein Alaa Jaber; Sinan Salman Hamde

Engineering and Technology Journal, 2010, Volume 28, Issue 6, Pages 1209-1217

This work aims at preparing and studying the effect of hydroxyapatite (HA)
and zirconia (ZrO2) additions on some physical properties and fracture strength of
dental ceramic. In this work, dental ceramic batches have been prepared from
(80% Potash feldspar, 15% silica and 5% Duekhla kaolin). Firstly, HA was
added with different percentages (2,4,6,8,10)%wt. Secondly, both of HA
and ZrO2 have been added in percentage (5%wt) with different weight
percentages for both of HA and ZrO2 to (95%wt) of dental ceramic batch.
Mixes were semi-dry pressed under (15 MPa) load, and they were fired at
(1100°C) temperature. The results show the fracture strength of the dental
that ceramic increases with the addition of HA. The best addition of HA was
(4 %wt) because it gives the best of the physical and mechanical properties.
By the addition of HA:ZrO2 mixture, the value of fracture strength
increased more than the addition of HA alone.