Preparation and Characterization of Natural Hydroxyapatite: A Comparative Study of Bovine Bone Hydroxyapatite and Hydroxyapatite from Calcite

2007 ◽  
Vol 561-565 ◽  
pp. 1441-1444 ◽  
Author(s):  
M.K. Herliansyah ◽  
D.A. Nasution ◽  
Mohd Hamdi Bin Abdul Shukor ◽  
A. Ide-Ektessabi ◽  
Muhammad Waziz Wildan ◽  
...  
Keyword(s):  
Comparative Study ◽  
Hydrothermal Method ◽  
Hardness Test ◽  
Bovine Bone ◽  
Test Results ◽  
Natural Sources ◽  
Bovine Hydroxyapatite ◽  
Natural Hydroxyapatite

The production of natural hydroxyapatite (HAp) specifically from cortical bovine bones and natural calcite was studied in this paper. Bovine hydroxyapatite (BHA) was produced from bovine bone in bulk form by de-fatting continued with calcination at 900°C. Natural calcite hydroxyapatite (CHA) was produced by hydrothermal method. It was confirmed from XRD, FTIR, and SEM results that HA have been successfully produced from natural sources like bulk bovine bone and natural calcite. The results also show that the crystallinity of BHA is higher than CHA, matching with the hardness test results of sintered BHA and CHA.

Preparation and Characterization of Natural Hydroxyapatite: A Comparative Study of Bovine Bone Hydroxyapatite and Hydroxyapatite from Calcite

2007 ◽  
pp. 1441-1444 ◽  
Author(s):  
M.K. Herliansyah ◽  
D.A. Nasution ◽  
M. Hamdi ◽  
A. Ide-Ektessabi ◽  
M.W. Wildan ◽  
...  
Keyword(s):  
Comparative Study ◽  
Bovine Bone ◽  
Natural Hydroxyapatite

scholarly journals Characterization of mechanical properties of composite materials with filler coconut shell powder and sawdust with coconut fiber reinforcement as an alternative to low loaded brake friction materials

2021 ◽  
Vol 9 (2) ◽  
pp. 017-023
Author(s):  
Anak Agung Alit Triadi ◽  
Sujita Darmo
Keyword(s):  
Wear Test ◽  
Hardness Test ◽  
Friction Material ◽  
Test Results ◽  
Sintering Process ◽  
Wear Rates ◽  
Safety Standards ◽  
Composition Variation ◽  
Brake Lining

The purpose of the study is to determine the best composition variation of the fifth variation of the composition of the composite material against the wear test, hardness test, tensile test comparing values ​​ with the safety standards of the brake lining composite SAEJ 661. Making the specimens was performed by mixing the ingredients with a mixer for 15 minutes and then do the process of compaction, with a load of 4 tons and detained achieve holding time is desired, then dies (mould) are placed in the oven and do the sintering process at a temperature of 1500 C for 180 minutes and specimens removed from the mould, the process of finishing and testing. These test results show that the composition of the material that is on variation V best price obtained 96.575 HBN hardness, wear rates of 1,29x10-6 gr / (mm2.detik), and a tensile strength of 0.842 MPa, but the brake friction material not meet safety standards SAEJ brake 661.

Bovine Hydroxyapatite (BHA) Boron Oxide Composites

2008 ◽  
Vol 396-398 ◽  
pp. 403-406 ◽  
Author(s):  
Oguzhan Gunduz ◽  
L.S. Ozyegin ◽  
Sergey V. Dorozhkin ◽  
Onur Meydanoglu ◽  
Niyazi Eruslu ◽  
...  
Keyword(s):  
Boric Acid ◽  
Compression Strength ◽  
Boron Oxide ◽  
Pore Formation ◽  
Sintering Temperature ◽  
Bovine Bone ◽  
Time Saving ◽  
Natural Sources ◽  
Bovine Hydroxyapatite ◽  
Oxide Composites

Composites of calcinated bovine bone derived hydroxyapatite (HA) with 5, 7.5 and 10 wt % B2O3 were prepared by sintering. The production of HA from natural sources is preferred due to economical and time saving reasons. In this study scanning electron microscopy (SEM) investigations, microhardness and compression strength measurements were performed on composites. The experimental results indicated that compression strength and microhardness of HA-boron-oxide composites decrease when the content of boric acid and sintering temperature increase. The best mechanical properties achieved for 5 wt % addition of dehydrated boric acid. It was seen that at higher sintering temperatures, the compression strength and the microhardness decrease due to the very intensive pore formation. The results agree fairly well with microstructure analysis.

Bovine Hydroxyapatite (BHA) Strontium Oxide Composites

2008 ◽  
Vol 396-398 ◽  
pp. 407-410 ◽  
Author(s):  
Oguzhan Gunduz ◽  
L.S. Ozyegin ◽  
Sergey V. Dorozhkin ◽  
Onur Meydanoglu ◽  
Niyazi Eruslu ◽  
...  
Keyword(s):  
Compression Strength ◽  
Pore Formation ◽  
Sintering Temperature ◽  
Bovine Bone ◽  
Strontium Oxide ◽  
Time Saving ◽  
Natural Sources ◽  
Bovine Hydroxyapatite ◽  
Oxide Composites ◽  
Scanning Electron

Composites of calcinated bovine bone derived hydroxyapatite (HA) with 5 and 10 wt % SrCO3 were prepared by sintering. The production of HA from natural sources is preferred due to money and time saving reasons. In this study scanning electron microscopy (SEM) investigations and together with measurements of microhardness, density, and compression strength were performed. The experimental results indicated that compression strength and microhardness values of HA-Sr-oxide composites decrease when the content of SrCO3 and sintering temperature increase. The best compression strength values were achieved after sintering at 1000°C. It was seen that at higher temperatures the compression strength and the microhardness values decrease due to the pore formation. The pore formation is very important for scaffold formation for tissue engineering purposes.

Synthesis and Characterization of Aluminiun 2219 Reinforced with Boron Carbide and Molybdenum Disulfide Metal Matrix Hybrid Composites

2015 ◽  
Vol 1101 ◽  
pp. 28-31 ◽  
Author(s):  
G.S. Shiva Shankar ◽  
S. Basavarajappa
Keyword(s):  
Boron Carbide ◽  
Molybdenum Disulfide ◽  
Hybrid Composites ◽  
Hardness Test ◽  
Xrd Analysis ◽  
Stir Casting ◽  
Test Results ◽  
Physical Content ◽  
Casting Technique

An attempt has been made to develop and characterize the Al2219 reinforced with Boron carbide (B4C) and Molybdenum disulfide (MoS2) hybridcomposites. The hybrid composites were prepared by using stir casting technique. Theexperimentalresult evaluates the density,micro hardness test & tensiletest.Themicrostructure shows existence of randomly dispersed reinforcement particles andfine reinforcement particles in prepared hybrid composites.X-Ray powder diffraction (XRD) analysis were conducted this confirms the physical content of constituents present in prepared composites. SEM is used to examine fracture surface of tensile specimens for hybrid composites & this consists of ductile& brittle fracture of mixed mode.The test results revels that, themicro hardness and density is minimum for Al2219 and maximum for Al+3%B4C+5%MoS2. The tensile properties of the material vary according to the percentage of reinforcing material added.

scholarly journals Synthesis techniques, characterization and mechanical properties of natural derived hydroxyapatite scaffolds for bone implants: a review

2021 ◽  
Vol 3 (10) ◽  
Author(s):  
Obinna Anayo Osuchukwu ◽  
Abdu Salihi ◽  
Ibrahim Abdullahi ◽  
Bello Abdulkareem ◽  
Chinedu Sixtus Nwannenna
Keyword(s):  
Mechanical Properties ◽  
Sintering Temperature ◽  
Bone Cements ◽  
Bovine Bone ◽  
Testing Method ◽  
Synthesis Techniques ◽  
Basic Understanding ◽  
Standard Values ◽  
Natural Hydroxyapatite

AbstractHydroxyapatite (HAp) with good mechanical properties is a promising material meant for a number of useful bids in dentistry and orthopedic for biomedical engineering applications for drug delivery, bone defect fillers, bone cements, etc. In this paper, a comprehensive review has been done, by reviewing different literatures related to synthesis techniques, mechanical properties and property testing, method of calcination and characterization of hydroxyapatite which are product of catfish and bovine bones. The discussion is in relations of the obligatory features vital to attain the best properties for the envisioned bid of bone graft. The process approaches that are capable of fabricating the essential microstructure and the ways to advance the mechanical properties of natural mined HAp are reviewed. The standard values for tensile strength were found to be within the range of 40–300 MPa, compressive strength was 400–900 MPa, while Elastic modulus was 80–120 GPa and fracture toughness was 0.6–1 MPa m1/2 (Ramesh et al. in Ceram Int 44(9):10525–10530, 2018; Landi et al. in J Eur Ceram Soc 20(14–15):2377–2387, 2000; Munar et al. in Dent Mater J 25(1):51–58, 2006). Also, the porosity range was 70–85% (Yang et al. in Am Ceram Soc Bull 89(2):24–32, 2010), density is 3.16 g/cm3 and relative density is 95–99.5% (Ramesh et al. 2018; Landi et al. 2000; Munar et al. 2006). The literature revealed that CaP ratio varies in relation to the source and sintering temperature. For example, for bovine bone, a CaP ratio of 1.7 (Mezahi et al. in J Therm Anal Calorim 95(1):21–29, 2009) and 1.65 (Barakat et al. in J Mater Process Technol 209(7):3408–3415, 2009) was obtained at 1100 °C and 750 °C respectively. Basic understanding on the effect of adding foreign material as a strengthening agent to the mechanical properties of HAp is ground factor for the development of new biomaterial (Natural hydroxyapatite, NHAp). Therefore, it is inferred that upon careful combination of main parameters such as compaction pressures, sintering temperatures, and sintering dwell times for production natural HAp (NHAp), mechanical properties can be enhanced. Graphic abstract

scholarly journals Karakterisasi Material Biokomposit Bovine Hidroksapatit (BHA)/Shellac dan Kitosan Sebagai Material Bone Filler

ROTASI ◽  
2017 ◽  
Vol 19 (2) ◽  
pp. 82
Author(s):  
Junaidi Rasid ◽  
Joko Triyono ◽  
Teguh Triyono
Keyword(s):  
Bovine Bone ◽  
Test Results ◽  
X Ray Diffraction ◽  
Calcination Process ◽  
X Ray ◽  
Medical Needs ◽  
Bone Filler ◽  
Bone Powder ◽  
Bovine Hydroxyapatite ◽  
Scanning Electron

Development of composite materials is growing rapidly to support medical needs. Biocomposite was made from bovine bone powder/shellac/chitosan for bone filler applications. Biocomposite of BHA(Bovine Hydroxyapatite)/shellac/chitosan was derived of bovine bone powder coated with shellac 10 ml. Mixed variation between BHA/shellac and chitosan i.e 30:40, 40:60, 50:50, 60:40, 70:30 %wt  were synthesized by dry method. Samples of BHA/shellac/chitosan were compacted with the pressure 60 bar until becomes solid with the cylinder mold 13 mm and 8 mm in thickness, the calcination process on temperature of  900ºC for 2 hours and increased temperature is 10ºC/min. Test XRD (X-Ray Diffraction), Microvickers, DTS (Diametric Tensile Strength) and SEM (Scanning Electron Microschopy), Density, and Porosity. XRD test results showed that bovine powder has become BHA (Bovine Hydroxyapatite), microvickers test of sample BHA/shellac/chitosan for maximum was 7.47 ± 0.685 VHN and 0.182 ± 3.73 VHN for minimum, DTS test of sample BHA/shellac/chitosan maximum at 36.66 ± 9.01 KPa and minimum at 13.90 ± 1.24 KPa. Porous observations with SEM toward sample BHA/shellac/chitosan porous size and number of samples contained at BHA/shellac/chitosan is 70:30 wt%. Density test with  highest value was 1,168gr/cm3, and lowest 1,070 gr/cm3. Highest porosity value at variation 50/50 %wt = 0,988%, and the lowest at 70/30 %wt = 0,977%

A review on bovine hydroxyapatite; extraction and characterization

2021 ◽  
Author(s):  
Ali Moradi ◽  
Majid Pakizeh ◽  
Toktam Ghassemi
Keyword(s):  
Bone Substitutes ◽  
Extraction Process ◽  
Extraction Methods ◽  
High Rate ◽  
Bovine Bone ◽  
Future Perspectives ◽  
Electron Microscopies ◽  
Natural Bone ◽  
Bovine Hydroxyapatite

Abstract High rate of bone grafting surgeries emphasizes the need for optimal bone substitutes. Biomaterials mimicking the interconnected porous structure of the original bone with osteoconductive and osteoinductive capabilities have long been considered. Hydroxyapatite (HA), as the main inorganic part of natural bone, has exhibited excellent regenerative properties in bone tissue engineering. This manuscript reviews the HA extraction methods from bovine bone, as one of the principal biosources. Essential points in the extraction process have also been highlighted. Characterization of the produced HA through gold standard methods such as XRD, FTIR, electron microscopies (SEM and TEM), mechanical/thermodynamic tests, and bioactivity analysis has been explained in detail. Finally, future perspectives for development of HA constructs are mentioned.

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