Abstract: The present invention relates to fine hollow powder with a titanium oxide shell, obtained by spray drying an exfoliated titania sol, and thin flaky titanium oxide powder obtained by pulverizing the fine hollow powder, and also to processes for producing the same. The present fine hollow powder and thin flaky titanium oxide powder have a distinguished dispersibility and are useful for additives to cosmetics, pigments, paints, etc., and the present fine hollow powder also has a distinguished flowability and is useful for seed particles for flow measurement.

Abstract: A calcium phosphate porous sintered body which comprises spherical pores communicating with one another substantially throughout the body with a porosity of 55% or more and 90% or less, and has an average diameter of the inter-pore communicating parts of 50 &mgr;m or more, a pore diameter of 150 &mgr;m or more, and a three-point bending strength of 5 MPa or more, and a method for producing the same.

Abstract: A computer-aided class composition design apparatus includes a memory device having stored therein glass component compound data and glass physical property data. A display device is used for initially displaying a plurality of glass component compounds from among the glass component compound data. Using an input device, a glass composition is selected from among the displayed glass components. The glass physical property data is processed to approximate at least one physical property of the selected glass composition. Alternately, the glass physical properties themselves are displayed and values assigned thereto, and the component compound data and glass physical property data are processed to obtain a glass composition having approximated physical property values in accordance with the selected physical property values.