目前國內燃煤電廠每年產生約40萬噸之底灰，但利用率相當低，多數堆置於灰塘中，面臨了堆置空間不足的困境。本實驗以燃煤底灰添加碳酸鎂及二氧化鈦熔製玻璃，並經由適當熱處理程序得微晶玻璃，以達底灰資源化的效果。
利用DTA分析得知，20M5T及30M5T玻璃配方一階段熱處理之結晶活化能分別為95.73kJ/mol及102.87kJ/mol；二階段熱處理之結晶活化能分別為162.33kJ/mol及205.2kJ/mol。二階段熱處理之結晶活化能雖較一階段高，但由SEM結果發現二階段熱處理相對的結晶較多。
基本物理性質量測方面，熱處理後之玻璃體密度皆大於原樣玻璃；而二階段熱處理之玻璃孔隙率低於一階段之玻璃，與二階段熱處理顯微照相孔洞較少之結果相互應。
而20M5T玻璃配方熱處理至1200℃時，結晶相經XRD分析為堇青石(Cordierite)及假板鈦礦(Pseudobrookite)，其二階段熱處理之熱膨脹係數(α)為60（10-7/℃），與粉末燒結之堇青石微晶玻璃熱膨脹係數相近。

At present, there is approximately 400,000 tons of bottom ash produced by domestic coal-burning electric power plants annually. However, the utilization rate is comparatively low. Most of it has been piled up in the ash-pond so nowadays we are facing a difficulty of space deficiency to stack the bottom ash.
In this research, adding MgCO3 and TiO2 to bottom ash to form glass and to transform glass ceramics through an appropriate heat-treatment processing to achieve the purpose of recycling of bottom ash.
Using DTA analysis showed that, the crystallization activation energy of 20M5T and 30M5T glass formulation of one step heat-treatment were 95.73kJ/mol 102.87kJ/mol; the crystallization activation energy of two step heat-treatment were 162.33kJ/mol and 205.2kJ/mol. The crystallization activation energy of two step heat-treatment was higher than one step, but from the SEM results showed that the crystal site of two step heat-treatment was relatively large.
Cordierite and Pseudobrookite were formed with 20M5T glass formulation at 1200℃. And the coefficient of thermal expansion of two step heat-treatment was 60(10-7℃), which was close to the coefficient of thermal expansion of Cordierite glass ceramic with powder sintering.
As to the quality of basic physical measurements, the glass density after heat-treatment was greater than the original glass; while the glass porosity rate after two step heat-treatment was less than the glass of one step heat-treatment, which was parallel with the result of two step heat-treatment of micrograph that showed less holes.

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