Improved transmittance realized in potassium sodium niobatebased lead free ceramics via LiBiO2 modification
DING Xi, PENG Zhanhui, ZHANG Fudong, NIE Xinru, CHAO Xiaolian, YANG Zupei*
(School of Materials Science and Engineering, Shaanxi Normal University,Xi′an 710119, Shaanxi, China)
Abstract:
In order to improve the transmittance of potassium sodium niobate based lead free ceramics, a series of 0.95(K1/2Na1/2)NbO3-0.05Ba(Zn1/3Nb2/3)O3-x mol %LiBiO2(0.95KNN-0.05BZN-x mol%LB) transparent ceramics were prepared by a traditional solid-state method and the transmittance was characterized. It was found that when x=1, the transmittance of ceramics was the highest (65%, 780 nm), while the porosity began to increase and the transmittance gradually decreased when the doping amount continued to increase. The results indicated that the introduction of LiBiO2 not only reduces the porosity of ceramics, but also increases the grain size, reducing the light scattering from pores and grain boundaries, and effectively improves the transmittance of ceramics.
KeyWords:
niobate based lead free ceramics; microstructure; grain size; bulk density