实现了一种通过水玻璃粘结剂将碳纳米管植入玻璃基底表面并呈现均匀"植布"效果的场发射电极.通过低温工艺固化碳纳米管形态,并保证高选择比的湿法刻蚀工艺,实现碳纳米管端部刻蚀露出作为场发射源,而根部植入水玻璃粘结介质中的分散植布效果.通过高温强化工艺,在碳纳米管与粘结剂结合界面形成1层稳定的-Si-O-薄膜,增加碳纳米管与阴极薄膜的结合力,提高其场发射性能.高温强化后电极开启电压由1.52 V/μm降至0.74 V/μm明显降低.同时,在外加场强2.3 V/μm时,可以得到大于233 μA的稳定场发射电流持续发射40 h.
A field emission electrode with carbon nanotube (CNT) homogeneously rooted in glass was achieved through sodium silicate (SS).CNTs homogeneously rooted in the SS paste were obtained by wet etching after solidification process under low temperature.By using high temperature retreatment, a firm-Si-O-film formed on the interface between CNT emitters and SS paste.The film adhesion enhanced and emission performance improved significantly.The turn on field significantly decreased from 1.52 to 0.74 V/μm after high temperature retreatment.For the treated emitter, with applied field of 2.3 V/μm, reliable operation for 40 h at a high emission current of more than 233 μA was also achieved
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