| Abstract: | 溶凝膠法〈Sol-Gel Coating〉是製作塗層的薄膜，利用熱處理的作用將溶凝膠薄膜轉變成緻密的氧化膜，我們嘗試以矽土凝膠作為溶凝膠法的燒結媒介材料，想利用此一特性適度的氧化，適當地熱擴散處理，善用此一氧化層成分，來提高黏著鍵結強度，改善溶凝膠法所製作氫氧磷灰石覆蓋植體氫氧磷灰石和鈦金屬界面的關係。本篇研究的目的是利用溶凝膠浸漬覆膜法〈Sol-Gel coating by dipping process〉來製作塗層薄膜，作為溶凝膠法的燒結媒介材料，改變矽土凝膠〈Silica Gel〉的濃度和加熱溫度來塗層鈦金屬表面，利用金相顯微鏡觀察表面結構變化，以X光繞射〈XRD〉來了解熱處理後表面成分，以及用掃描式電子顯微鏡〈S.E.M.〉來觀察鈦金屬表面氧化層構造變化情況。用水含量為0；25﹪；33﹪；50﹪；67﹪；1六種矽土懸浮液凝膠溶液塗層鈦金屬，分別在100、200、300、400、500、600、700和800℃溫度下燒結。實驗結果以金相顯微鏡觀察，以探針刻劃表面，發現當水含量為33﹪和50﹪的有最均勻的狀態，顆粒分布最平均，在掃描式電子顯微鏡觀察，燒結超過400℃時表面呈現較緻密的結構。以探針刻劃，發現其黏附有一定的效果，600℃、700℃的條件下，其氧化層相當緻密，800℃則太厚，相較之下則以700℃的氧化層較佳。經X光繞射分析表面為鈦、二氧化鈦及無定型二氧化矽等。有效的塗層可以改善不同材質介面的結合，適當的氧化層結構可以作為結合的媒介。
There were many methods for hydroxyapatite coating on pure titanium. One method is coating by sol-gel dipping procedure. It can be formed by immersion, start-up, deposition, drainage and evaporation to prepare coating materials and by heat treatment to enhance the adhesive strength. The aim of this study of this was to investigate the structure on the surface of titanium by sol-gel technique coating thin silica and TiO2 films.
Titanium was coated with 5 different concentrations. The water rate of silica gel were 0﹪, 25﹪, 33﹪, 50﹪,67﹪,1. They were treatment by sol-gel method. The silica gel coated speciments were annealed at 100, 200, 300, 400, 500, 600, 700 and 800℃ respectively. The photographs of optical microscope showed that the titanium could be coated uniformly with water rate of 33﹪and 50﹪of silica gel. The SEM micrographs showed that titanium could bind with silica at the temperature over 400℃. When the temperature over 600℃, the TiO2 coating films was so dense and the hardness were acceptable. After XRD test, there were Ti, TiO2, SiO2 and amorphous SiO2 films etc. on the surface. The titanium substrates annealed at 600℃ and 700℃, and the water rate of 33﹪and 50﹪of silica gel by sol-gel method could get a property SiO2 and TiO2 films for hydroxyapatite coating on pure titanium. |
