The aim of this research is to study the optimal conditions for the preparation of
hydroxyapatite , Chemical formula: Ca10(PO4)6(OH)2 (HA). In the three-component
system: Ca(NO3)2-(NH4)2HPO4-NH3.H2O , Calcium Nitrate was prepared based on the
calc
ification of the white eggshell . to obtain calcium oxide (CaO), which is treated with
nitrogen acid, while ammonium phosphate Mono hydrogen and ammonium solution was
taken from its pure packaging. Hydroxyapatite (HA) Ca10 (PO4) 6 (OH)2was prepared
under specific conditions, mainly: concentration of solutions used, speed of addition of
reagents, reaction mix temperature, rotational speed, purity of materials used, and pH of
the solution.
The study showed that the solid compound recorded in the three-component
system, which was separated from the liquid phase and dried and chemically analyzed, has
the total chemical formula Ca10 (PO4) 6 (OH)2 and has a Molar ratio of Ca / P=
1.666 . and the preparation process was better in the model burned from the dried model
and confirmed by the study of samples of the models dried and burned by IR infrared
spectroscopy and XRD X ray diffraction spectroscopy, The burner model was a crystalline
product, but in the dried model the output was mixed crystalline and not crystalline.
Porous glasses were produced using sheet glass cullet with added
magnesium carbonate MgCO3 as foams agents .The structure of glasses
tinged with silver bromide by porous glasses, was studied by UV–VIS
spectroscopy,transmission of light and X-ray diffraction XRD
techniques. glasses plates were obtained by impregnation of porous
glasses at first with AgNO3 aqueous solution , next in the KBr aqueous
solution. Then the samples was sintered at temperatures 950°C up to
closing of the pores. The results of spectroscopy study have shown that
the glasses tinged plates, according to XRD data, the glasses tinged
contain the AgBr phase.
In this research study of the conditions necessary for the preparation of a chemical
compound hydroxyapatite HA [HA: Ca10 (PO4) 6 (OH) 2] Depending on normal vital
source ( eggshell ) , which contains a large amount of calcium carbonate , which wil
l be
dealt with Acetic acid
for acetate calcium Ca (CH3COO)2 , which in turn will be dealt with disodium
hydrogen phosphate Na2HPO4, where and to prepare the treatment process depends on
several factors , including: the concentration of the solutions , Solution temperature,
stirring speed and addition , the degree of purity of the material used and its source, and the
pH of the solution PH . The study showed that the chemical formula of the compound
outlined in the bunting record is:
Ca10 (PO4) 6 (OH) 2 and has a Molar ratio Ca / P stood at 1.65344
and preparation process was the best in the burned model of the form , dried and this
was confirmed by sampling study of the two models , dried and burned in IR spectroscopy
and spectroscopy x-ray diffraction XRD where the burned model output was crystalline
either in the form of dried product was mixed crystalline and crystalline .
The thin films of TiO2 were prepared by the Sol-Gel, on glass
subtracts by using the following initial solutions: trichlorethylene
titanium, ethanol, sodium hydroxide and hydrochloric acid and
distilled water. The films were annealed at temperatur
es(200- 300-
400-500)c° for 1 hour. The structure of the prepared and annealed
films were studied by XRD. The XRD rusltes showed that the films
prepared crystallize according to orthorhombic Structure.Lattice
constants were calculated and it was found that it was consistent
with the data JPCDS and with some scientific works.
