mechanical properties of coal , calcium phosphate apatite

mechanical properties of coal , calcium phosphate apatite

[PDF] The Mechanical Properties of Biocompatible Apatite

Calcium phosphate cement (CPC) is a well-established bone replacement material in dentistry and orthopedics. CPC mimics the physicochemical properties of natural bone and therefore shows excellent in vivo behavior. However, due to their brittleness, the application of CPC implants is limited to non-load bearing areas. Generally, the fiber-reinforcement of ceramic materials enhances fracture

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Mechanical properties of SpringerLink

The ultimate values for compressive strength, Young's modulus, and toughness of cylindrical specimens of unitary aspect ratios and uniform grain-size distributions were extrapolated for hydroxyapatite (HAP) to 70 MPa, 9.2 GPa, and 0.36 J cm-3, and for tricalcium phosphate (TCP), to 315 MPa, 21 GPa, and 2.34 J cm-3. For total volume porosities of 50%, the corresponding values were determined

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Calcium phosphate apatites with variable Ca/P atomic ratio

However, several authors [2][3][4] [5] [6] have worked on the mechanical properties of calcium phosphate given the need for a good recognition of its rheological behavior. So far, different

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The Mechanical Properties of Biocompatible Apatite Bone

Calcium phosphate cement (CPC) is a well-established bone replacement material in dentistry and orthopedics. CPC mimics the physicochemical properties of natural bone

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Hydroxyapatite (HAP) / Tricalcium phosphate (TCP) DEV

2021-9-1  Calcium phosphates constitute the mineral part of bone tissue in mammals. There are different types of calcium phosphate: Apatite: Hydroxyapatite Chloroapatite Fluoroapatite Tricalcium phosphate (a and b) The chemical properties of calcium phosphates, including their behaviour in water, are directly related to their composition, in other words their Ca/P molar ratio.

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Improvement of the mechanical properties of new calcium

The hardening properties of calcium phosphate cements in the CaHPO4-alpha-Ca3(PO4)2 (DCP-alpha-TCP) system have been investigated with interest focused on the compressive strength and microstructure development. Previous studies have shown that the addition of CaCO3(CC) leads to a modification of th

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Mechanical properties of cellulose–apatite composite

2013-7-18  Abstract. Cellulose–apatite composite fibres with a diameter of 22 μm were prepared by coextrusion of a cellulose slurry loaded with 10, 30 and 50 vol.-% (with respect to dry cellulose, (C 6 H 10 O 5) n with n=400) hydroxyapatite (HA, Ca 10 (PO 4) 6 (OH) 2) powder with an average particle size of 4˙1 μm.The cellulose solution was prepared according to the Lyocell technique.

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Insight into Biological Apatite: Physiochemical Properties

Biological apatite is an inorganic calcium phosphate salt in apatite form and nano size with a biological derivation. It is also the main inorganic component of biological hard tissues such as bones and teeth of vertebrates. Consequently, biological apatite has a wide application in dentistry and orthopedics by using as dental fillers and bone substitutes for bone reconstruction and regeneration.

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Bioactive calcium phosphate materials and applications in

2019-1-14  Calcium phosphates are minerals composed of calcium cations and phosphate anions. They are known as the major inorganic material in approximately 60% of all native human bones (Table 1).The existence of calcium phosphates in bones was first discovered in 1769, and in the 1800s, calcium phosphates that exist in bones were subdivided into different categories (Fig. 1) [11, 12].

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(PDF) Influence of calcium compounds on the mechanical

The influence of calcium compounds (CaO and Ca(OH)(2)) on the mechanical properties of fly ash based geopolymers has been studied. Calcium compounds were substituted

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[PDF] The Mechanical Properties of Biocompatible Apatite

Calcium phosphate cement (CPC) is a well-established bone replacement material in dentistry and orthopedics. CPC mimics the physicochemical properties of natural bone and therefore shows excellent in vivo behavior. However, due to their brittleness, the application of CPC implants is limited to non-load bearing areas. Generally, the fiber-reinforcement of ceramic materials enhances fracture

get price

Mechanical properties of SpringerLink

The ultimate values for compressive strength, Young's modulus, and toughness of cylindrical specimens of unitary aspect ratios and uniform grain-size distributions were extrapolated for hydroxyapatite (HAP) to 70 MPa, 9.2 GPa, and 0.36 J cm-3, and for tricalcium phosphate (TCP), to 315 MPa, 21 GPa, and 2.34 J cm-3. For total volume porosities of 50%, the corresponding values were determined

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Mechanical properties and in vitro bioactivity of Ca5(PO4

Pure Ca(5)(PO(4))(2)SiO(4) bioceramic was first prepared by a sol-gel method using triethyl phosphate, tetraethoxysilane, and calcium nitrate tetrahydrate as original materials. Simulated body fluid (SBF) immersion tests revealed that Ca(5)(PO(4))(2)SiO(4) samples had a greater in vitro apatite-form

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Improvement of the mechanical properties of new calcium

The hardening properties of calcium phosphate cements in the CaHPO4-alpha-Ca3(PO4)2 (DCP-alpha-TCP) system have been investigated with interest focused on the compressive strength and microstructure development. Previous studies have shown that the addition of CaCO3(CC) leads to a modification of th

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Mechanical properties of sintered hydroxyapatite and

The ultimate values for compressive strength, Young's modulus, and toughness of cylindrical specimens of unitary aspect ratios and uniform grain-size distributions were extrapolated for hydroxyapatite (HAP) to 70 MPa, 9.2 GPa, and 0.36 J cm(-3), and for tricalcium phosphate (TCP), to 315 MPa, 21 GPa

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Preparation and mechanical properties of calcium

New artificial bone materials were prepared using calcium phosphates, hydroxyapatite and β-tricalicum phosphate, and copoly-L-lactide, CPLA. Calcium phosphate powder and CPLA were mixed at 453 K for 10 min with various mixing ratios. Scanning electron microscope observations indicated that the composites of β-tricalicum phosphate and CPLA were homogeneously dispersed and highly adhesive

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Mechanical properties of cellulose–apatite composite

2013-7-18  Abstract. Cellulose–apatite composite fibres with a diameter of 22 μm were prepared by coextrusion of a cellulose slurry loaded with 10, 30 and 50 vol.-% (with respect to dry cellulose, (C 6 H 10 O 5) n with n=400) hydroxyapatite (HA, Ca 10 (PO 4) 6 (OH) 2) powder with an average particle size of 4˙1 μm.The cellulose solution was prepared according to the Lyocell technique.

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Insight into Biological Apatite: Physiochemical Properties

Biological apatite is an inorganic calcium phosphate salt in apatite form and nano size with a biological derivation. It is also the main inorganic component of biological hard tissues such as bones and teeth of vertebrates. Consequently, biological apatite has a wide application in dentistry and orthopedics by using as dental fillers and bone substitutes for bone reconstruction and regeneration.

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A straightforward approach to enhance the textural

A major challenge in the design of bone graft substitutes is the development of injectable, cohesive, resorbable and self-setting calcium phosphate cement (CPC) that enables rapid cell invasion with initial mechanical properties as close as bone ones. Thus, we describe specific conditions in CPC-blo

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Tricalcium Phosphate an overview ScienceDirect Topics

Biphasic calcium phosphate systems. Biphasic calcium phosphates (BCPs) are a mixture of HA and β-tricalcium phosphate (β-TCP). The ratio of HA/TCP plays a key role in the bioactivity and dissolution rate of the material. This combination of stable HA and resorbable β-TCP allows for controllable resorption and gives BCP its mechanical properties.

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The Mechanical Properties of Biocompatible Apatite Bone

Calcium phosphate cement (CPC) is a well-established bone replacement material in dentistry and orthopedics. CPC mimics the physicochemical properties of natural bone and therefore shows excellent in vivo behavior. However, due to their brittleness, the

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Mechanical improvement of calcium carbonate cements

2019-4-25  Calcium carbonate cements are a promising alternative for calcium phosphate cements. Due to the higher solubility of calcium carbonate compared to apatite, it is expected to have an improved biodegradation rate; a clear advantage for prospective biomedical applications in

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Hydroxyapatite :: properties, uses and applications

2021-10-29  Hydroxyapatite (HAp) is a calcium phosphate similar to the human hard tissues in morphology and composition 1.Particularly, it has a hexagonal structure 2, 3 and a stoichiometric Ca/P ratio of 1.67, which is identical to bone apatite 2, 4, 5.. An important characteristic of hydroxyapatite is its stability when compared to other calcium

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Physicochemical Properties of Calcium Phosphate Based

2015-2-16  Coating of the GP with apatite/calcium phosphate is proposed to enhance its surface properties as root canal filling material. Similarity of the coating components to hydroxyapatite in root dentin might increase the chemical adhesion of some sealers that bond chemically to root dentin such as glass ionomer-based sealer [ 17 ].

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The study and development of calcium phosphate bone

The chemical composition, microstructure, and mechanical properties of the raw materials and resulting calcium phosphate cements and composites have been characterized by X-ray Diffraction (XRD), scanning electron microscope (SEM), electron energy dispersive spectrometer (EDS), and Instron universal mechanical testing machine.

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A first report of hydroxylated apatite as structural

2016-5-19  The interplay of calcium phosphate and carbonate seems to be important for the formation and differential physical properties of these structures, such as the unusually small size of the apatite

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Impartation of apatite‐forming ability to chitosan

2021-2-2  of the body, because of suitable mechanical properties of chitosan for artificial bone. In a recent 20 years, bioactivity treatment to chitosan was attempted by reinforcing with β-TCP and calcium phosphate invert glass [18], by modifying with silanol groups and calcium ions [19], by phosphorylation and Ca(OH)2 treatment [20], and so on.

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Synthesis and Characterization of Calcium Phosphate

property for the growing of bone minerals, whilst inorganic substance supports the mechanical strength of the bone. Calcium phosphate is a major component in bone minerals [1-5]. Hydroxyapatite (HA), the most commonly used calcium phosphate in medical fields, possesses excellent biocompatibility and is osteoconductive [6,7].

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(PDF) Influence of β-tricalcium phosphate dispersion on

Mechanical properties of hydroxyapatite (HAp) ceramics and HAp/β-tricalcium phosphate (β-TCP) composites were measured at room temperature and at 1100°C to investigate influence of the β-TCP

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(PDF) Influence of calcium compounds on the mechanical

The influence of calcium compounds (CaO and Ca(OH)(2)) on the mechanical properties of fly ash based geopolymers has been studied. Calcium compounds were substituted in fly ash at 1, 2 and 3 wt

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