本研究主要將透輝石相玻璃粉末，利用二次熱處理方法，希望提升其燒結緻密性與微波特性。本研究主要先將氧化鎂、氧化鈣、氧化矽、氧化鋯粉末，依比例MgO-CaO-2SiO2混合，之後使粉末於1500oC熔融並爐冷，爐冷後再研磨過的玻璃粉末，於溫度範圍800℃至848℃之間進行持溫5分鐘的熱處理，研究預結晶對於玻璃陶瓷燒結特性影響，而後結晶的玻璃粉末再經過球磨與壓錠，並於960℃進行持溫2小時的燒結。實驗並透過熱分析儀、電子顯微鏡、X-Ray分析儀與電性量測探討其成核溫度、微觀結構、相變化以及介電特性。其中，DTA顯示於830℃出現第一放熱峰，對比XRD圖譜可清楚看出玻璃粉末於832℃~848℃下進行熱處理5分鐘，出現氧化鋯峰值，此結果代表玻璃粉末於830℃時進行熱處理，可出現氧化鋯成核現象。，玻璃粉末在800℃~824℃熱處理持溫五分鐘，之後在大氣下燒結溫度960℃時，燒結後的試片發生燒結緻密度不佳(密度介於2.1~2.4 g/cm3) ，孔隙過多導致品質因子介於1654~1754 GHz之間，介電常數低，約4.89~5.75之間，另外若發現粉末在832℃~848℃熱處理持溫五分鐘，而後在大氣下燒結溫度960℃時，可以獲得高緻密度的樣品(密度大於3 g/cm3)，品質因子高達10440 GHz，介電常數7.2，且對比未熱處理而直接於960℃的試片，品質因子為8464 GHz，介電常數為7.35，結果玻璃粉末於832~848℃進行第一階段熱處理，玻璃粉末內出現結晶現象，而後第二階段燒結的樣品呈現高緻密性，並提升品質因子與介電常數。
論文另一部分，若將第一階段熱處理848℃持溫五分鐘後的玻璃粉末，摻雜2.5、5、7.5、10、12.5、15 mol%鈦酸鈣後，希望修正溫度頻率係數。結果發現，熱處理完後的樣品摻雜鈦酸鈣後，從XRD可看出鈦酸鈣含量逐漸增加，電性結果顯示，隨著添加鈦酸鈣含量的提高，介電常數則是從7.74上升到9.64，溫度頻率係數則是從-65.45 ppm/℃改善至-26.9 ppm/℃，品質因子則降低至3291 GHz，乃因鈦酸鈣具有高介電常數、正溫度係數，而品質因子降低乃因鈦酸鈣品質因子低所導致。

The CaMgSi2O6 glass-ceramic with low dielectric constant was investigated using low temperature co-fired ceramic capacitors (LTCC).
The CaCO3-Mg(OH)2-2SiO2 and ZrO2, nucleating agent, were mixed, and the resulting powders were melted at 1500℃, furnace cooling and ball milling. Glass frits heat treated at different temperatures from 800℃to 848℃ for 5 mins forms, and the pellets fabrication sintered at 960℃ for 2 hours were studied. The nucleation, Phase evolution, microstructures and dielectric properties of CaMgSiO6 glass-ceramics were analyzed by using DTA, XRD spectroscopy, scanning electron microscopy and electrical property measurements.
The DTA result shows that the first exothermic peak appears at the 830℃. Comparing the XRD pattern of the glass frits heat-treating from 832℃ to 848 ℃, the XRD reveal the ZrO2 peak in it, indicating that the ZrO2 nucleating agent firstly nucleate in the glass frits. However, the ZrO2 peak never appears in the XRD pattern due to the non-nucleation. Then, the densities and dielectric properties of the pellets using glass frits heat treated at 800 ℃ to 824 ℃ show the low densities (2.1~2.4 g/cm3), low dielectric constants (4.89~5.75) and low quality factors(1654~1754 GHz) due to the high pores in the pellets. In addition, the pellets using glass frits heat treating at 832 ℃ to 848 ℃ show that the high densities (>3 g/cm3), high dielectric constants (~7.2) and high quality factors (8570~10440 GHz), indicating that the ZrO2, nucleating agents, can be obtained in the glass frits with second heat treatment of 832℃ to 848 ℃.
Furthermore, we try to modify the temperature coefficient of resonant by using glass frits heat treated at 848℃ for 5 mins with CaTiO3 powder of 2.5 mole%, 5 mole%、7.5 mole%、10 mole%、12.5 mole% and 15mol% additions. The XRD patterns show the increase amount of CaTiO3 peak. The dielectric properties show that the enhanced dielectric constant and improved τf can be attributed to the high dielectric constant and positive τf of CaTiO3 phase. However, the CaTiO3 powders added in the MgCaSi2O6 glass-ceramic show the decrease of quality factors due the low quality factors of CaTiO3 phase.

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