Research articles
ScienceAsia 51S (2025):ID 2025s017 1-11 |doi:
10.2306/scienceasia1513-1874.2025.s017
Enhanced mechanical, electrical, and in vitro apatite-forming ability of the nano-hydroxyapatite bioceramics via Bi0.50 (Na0.80 K0.20 ) 0.5 TiO3 addition
Pharatree Jaitaa,b,c, Pimpilai Wannasuta,b,c, Orawan Khammana,b, Anucha Watcharapasorna,b,
Parkpoom Jarupoomd,e,*
ABSTRACT: In this research, the bioceramics system of nano-hydroxyapatite-bismuth sodium potassium titanate or
Ca10
(PO4
)6
(OH)2
/xBi0.50
(Na0.80
K0.20
)0.5
TiO3
(HAp/xBNKT), where x = 0, 20, 40, and 60 wt% were fabricated by a
solid-state mixed oxide technique. The HAp powder was synthesized from bovine bone, which is a natural material
and a waste product. The effect of BNKT concentration on phase evolution, physical, microstructure, mechanical (i.e.,
Vickers hardness (HV), Knoop hardness (HK), and fracture toughness (KIC)), dielectric, ferroelectric, and piezoelectric
properties as well as in vitro apatite-forming ability of the HAp bioceramic have been systematically investigated. XRD
revealed that pure HAp bioceramic had a hexagonal phase while the modified compositions showed two-phase mixture
of HApandBNKT.WithincreasingBNKTcontent,thepreparedHAp/xBNKTbioceramicsexhibitedmoredensestructure
and increased linear shrinkage value. Adding more BNKT also inhibited grain growth and resulted in improving
mechanical and electrical performances. The maximum values of mechanical (HV = 5.49 GPa, HK = 5.28 GPa, KIC
=6.90 MPa.m1/2), dielectric (?r = 230.28, tan? = 0.0728, ?max= 443.33), ferroelectric (Pmax = 25.46 ?C/cm2, Pr =
18.99 ?C/cm2, Ec = 10.08 kV/cm), and piezoelectric (d33 = 66 pC/N) properties were observed for the HAp/60BNKT
bioceramics. For in vitro bioactivity test, all HAp/xBNKT bioceramics showed a good apatite-forming ability to induce
apatite precipitation in a simulated body fluid solution. The results indicated that the HAp/60BNKT bioceramics had
potential to exhibit excellent mechanical and electrical performances with good bioactivity, and thus being a promising
biomedical application material.
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| a |
Department of Physics and Materials Science, Faculty of Science, Chiang Mai University, Chiang Mai 50200 Thailand |
| b |
Center of Excellence in Materials Science and Technology, Materials Science Research Center, Faculty of Science,
Chiang Mai University, Chiang Mai 50200 Thailand |
| c |
Office of Research Administration, Chiang Mai University, Chiang Mai 50200 Thailand |
| d |
Department of Industrial Engineering, Faculty of Engineering, Rajamangala University of Technology Lanna
(RMUTL), Chiang Mai 50300 Thailand |
| e |
Materials and Medical Innovation Research Unit, Faculty of Engineering, Rajamangala University of Technology
Lanna (RMUTL), Chiang Mai 50300 Thailand |
* Corresponding author, E-mail: noteparkpoom@gmail.com
Received 18 Nov 2024, Accepted 0 0000
|
