The influence of TiO2-SiO2 solution-gelation coating on bond strength of low-fusing dental porcelain to commercially pure titanium
10.3760/cma.j.issn.1002-0098.2012.s1.045
- VernacularTitle:不同温度热处理后TiO2-SiO2纳米薄膜对钛-瓷结合强度的影响
- Author:
Zi-Chuan ZHANG
1
;
Pei ZHANG
;
Qian ZHANG
;
Jian-Feng YANG
;
Tian-Wen GUO
Author Information
1. 白求恩国际和平医院口腔科
- Keywords:
Titanium;
Compressive strength;
Temperature;
Nanotechnology
- From:
Chinese Journal of Stomatology
2012;47(z1):195-199
- CountryChina
- Language:Chinese
-
Abstract:
Objective To investigate the effect of TiO2-SiO2 coatings with different firing temperatures to the Ti-porcelain bond strength.Methods The surface of titanium was coated uniformly with TiO2-SiO2 nano-coatings by solution-gelation (sol-gel) technology and then imposed three kinds of firing temperatures (300 ℃,500 ℃,750 ℃).The specimens without any coatings were the control group.The bond strength between the TiO2-SiO2 nano-coatings and titanium substrate was tested by the scarification.The Ti-porcelain bond strength was evaluated using three-point bending test.The phase composition of the TiO2-SiO2 nano-coatings was characterized by X-ray diffraction(XRD).The interface of Ti-porcelain and fractured titanium surface were investigated by scanning electron microscope (SEM).Results When the heat treatment temperature was 300 ℃,500 ℃ and 750 ℃,the bond strength of the coatings to the titanium substrate was (15.3±0.8),(22.1 ± 0.5),and (28.5 ±1.3) N respectively.The XRD patterns of the coatings showed that no rutile phase was found in all specimens.Compared with the Ti-porcelain system without any intermediate coatings [(29.5 ± 4.2) MPa],the bond strength of the same system coated with TiO2-SiO2 nano-coatings,being produced by the sol-gel technology and fired at 750 ℃ [(35.9 ± 2.3) MPa] was significantly increased by 21.8％.The SEM photomicrographs of titanium-porcelain interface morphology of the specimens before porcelain fused showed that the TiO2-SiO2 nano-coatings fired at 750 ℃ was compact and homogeneous without any obvious cracks.The location of the Ti-porcelain fracture existed within the TiO2-SiO2 nano-coatings.Conclusions TiO2-SiO2 nano-coatings by sol-gel technology fired at 750 ℃ can notablely improve the Ti-porcelain bond strength.
