The Powder characteristics and sintering behavior of coated were studied. Silica coated powders were prepared by sol-gel method. The particle size of the powders were nm and the thickness of the coating layer was nm. As the content increased, the layers improved the powder dispersion. The Zeta potential of coated was getting close to that of pure silica with a more negative charge, compared with that of the uncoated . The onset temperature of shrinkage curves shifted to higher temperatures with increasing contents

As a candidate for lead-free piezoelectric materials, dense (NKN-5LT) ceramics were developed by conventional sintering process. Sintering temperature was lowered by adding as a sintering aid. The electrical properties of NKN-5LT ceramics were investigated as a function of concentration. At the addition of 1 mol% , electromechanical coupling factor and piezoelectric coefficient of NKN-5LT ceramics were found to reach the highest values of 0.37 and 250 pC/N, respectively.

To reveal the relationship between the changes in the growth and photo- synthesis induced by low dose radiation, red pepper (Capsicum annuum L.) plants were serially irradiated three times with gamma rays of 0.5, 1, 2, 3, and 4 Gy. The plant growth was mo