| 摘要 |
<p>PROBLEM TO BE SOLVED: To obtain the subject ink containing particles homogeneously dispersed in a primary particle state, capable of providing a thin membrane having high photorefractive index and excellent transparency, and useful for an optical material or the like dispersing and mixing ultrafine particles of a metal oxide in a resin binder obtained by using a solvent consisting essentially of cyclohexanone. SOLUTION: This ink contains ultrafine particles or powder obtained by pulverizing a metal oxide powder such as a magnetic metal oxide consisting essentially of iron, a metal oxide consisting essentially of titanium, alumina, zirconia, magnesium oxide, cordierite, mullite, apatite, yttrium oxide, beryllium oxide, PZT, zinc oxide and barium titanate so as to have 5-100 nm particle diameter, preferably in a proportion of 0.1-60 wt.% (based on the weight of a resin binder), and dispersed and mixed in the resin binder such as a polymethyl methacrylate, obtained by using a solvent consisting essentially of cyclohexanone.</p> |
