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Sintering and Crystallization of Phosphate Glasses by CO 2 ‐Laser Irradiation on Hydroxyapatite Ceramics
Author(s) -
Obata Akiko,
Jones Julian D.C.,
Shinya Akiyoshi,
Kasuga Toshihiro
Publication year - 2012
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/j.1744-7402.2012.02757.x
Subject(s) - materials science , dissolution , crystallization , distilled water , phosphate glass , irradiation , ceramic , glass ceramic , phosphate , sintering , coating , laser , chemical engineering , composite material , mineralogy , nuclear chemistry , optics , chemistry , physics , optoelectronics , organic chemistry , doping , chromatography , nuclear physics , engineering
Phosphate glasses in the 50 CaO ‐(50‐x) P 2 O 5 ‐ xT i O 2 ‐1 Al 2 O 3 (x = 5–25 mol%) system were produced and irradiated with low energy density CO 2 laser to melt and crystallize on a hydroxyapatite ( HA ) ceramic plate for dental filler applications. The laser with 10.6 μm of wavelength is easily absorbed by phosphate and hydroxy groups. The phosphate glasses containing ~15 mol% of titania strongly adhered to the HA plate surface through melting and sintering by the laser irradiation. The coatings after the laser irradiation contained crystalline phases. There was no significant changes in the morphology of the coating containing 15 mol% of TiO 2 on the HA plate even after soaking in 0.1 m M HCl solution for 10 min. This coating was suspected to have good chemical durability. Powders of the glass or glass‐ceramic containing 15 mol% of TiO 2 were soaked in distilled water to check their dissolution behavior over the long term. Dissolution from the glass‐ceramic was much slower than those from the glass at all points.