標題: La4Ti9O24微波陶瓷低溫燒結及介電性質之研究
The Study for Microwave Ceramics La4Ti9O24 Low Temperature Sintering and Dieletric Properties
作者: 徐士偉
Shin-Wei Shu
林 鵬
Pang Lin
材料科學與工程學系
關鍵字: 低溫液相燒結;微波陶瓷;水系刮刀成型;La4Ti9O24陶瓷;La0.66TiO2.993陶瓷;微波特性;low Temperature Sintering;microwave ceramic;aqueous-based slip for tape-casting;La4Ti9O24 ceramic;La0.66TiO2. 993;microwave properties
公開日期: 2001
摘要: 本研究利用固態反應法在煆燒溫度1300℃持溫1小時所研製出的La4Ti9O24陶瓷粉體,添加玻璃粉GA-9(PbO-B2O3-SiO2)和GP-032(ZnO-B2O3-SiO2)使其能夠在低溫1000℃範圍下得到燒結緻密的陶瓷體。添加GA-9的試片,結構隨著GA-9的增加逐漸轉變為La0.66TiO2.993,而添加GP-032的試片,結構隨著GP-032的增加逐漸轉變為LaTi21O38。La0.66TiO2.993為高介電常數值,值約為130。LaTi21O38為低介電常數值,值約為30。所以可以藉由添加不同GA-9/ GP-032 配比使La4Ti9O24生成不同比例的La0.66TiO2.993/ LaTi21O38,如此就可以得到25~80的介電常數曲線。在微波陶瓷材料上提供另一種選擇。 採用沒有氫鍵的高分子鏈PEO當作水系刮刀的黏結劑,避免玻璃粉中的硼離子會和有氫鍵的黏結劑產生凝膠化的現象。
Ceramic powders La4Ti9O24 fabricated by solid state reaction at 1300℃for one hour and then mixed with frit GA-9(PbO-B2O3-SiO2) and GP-032(ZnO-B2O3-SiO2), were sintered at temperature 950℃, 1000℃, 1050℃.
Adding GA-9 on La4Ti9O24 to synthesize La0.66TiO2.993. La0.66TiO2.993 was a phase with high dielectric ceramic. Adding GP-032 on La4Ti9O24 to synthesize LaTi21O38. LaTi21O38 was a phase with low dielectric ceramic. To investigate the difference microwave properties, we controlled the compositions of GA-9/ GP-032. The gelation reaction will be inhibit under using no hydrogen bonding binder in an aqueous based slip for tape casting.
URI: http://140.113.39.130/cdrfb3/record/nctu/#NT900159047
http://hdl.handle.net/11536/68296
顯示於類別:畢業論文