| 摘要 |
Disclosed is a ferroelectric ceramic composition that does not contain harmful lead and that have satisfactory sinterability, as well as a nonlinear optical element including the ferroelectric ceramic composition. The ferroelectric ceramic composition includes a main component represented by a general formula (Ba<SUB>1-x-y</SUB>Sr<SUB>x</SUB>Ca<SUB>y</SUB>)Ag<SUB>1-d</SUB>Nb<SUB>5</SUB>O<SUB>15-d/2 </SUB>and having a tungsten bronze structure; and auxiliary components represented by a general formula aMnO<SUB>2</SUB>+bSiO<SUB>2 </SUB>(wherein a and b each represent parts by weight with respect to 100 parts by weight of the main component), wherein x, y, a, b, and d meet expressions 0.1<=x+y<=0.8, a+b<=5, and 0<=d<=0.6.
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