Titanium oxide particles and manufacturing method therefor
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United States of America
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Feb 11, 2025
Grant Date -
Jan 21, 2021
app pub date -
Mar 27, 2019
filing date -
Mar 27, 2019
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Abstract
The present invention manufactures titanium oxide particles that have a small degree of aggregation (size of aggregate particle diameter relative to primary particle diameter) and are not readily sintered by heating. The present invention has: a step in which an alkali and a solution including a carboxylic acid and a titanium (oxy)chloride are mixed, and the titanium (oxy)chloride is hydrolyzed by neutralization; and a step in which, after the hydrolysis by neutralization, the solution is heated to a temperature of 80° C. or more and 110° C. or less, and the titanium (oxy)chloride remaining in the solution is hydrolyzed by heating. It is thus possible to obtain titanium oxide particles that have a small degree of aggregation and a range of 1-35 for the ratio (D90/BET diameter) between the 90% cumulative mass particle size distribution diameter (D90) (nm) as measured by a dynamic light-scattering particle diameter distribution measurement device and the BET diameter (nm) as calculated from the specific surface area of the titanium oxide particles.
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