STRONTIUM TITANATE-BASED FINE PARTICLE FOR TONER AND MANUFACTURING METHOD THEREFOR

• Main Authors: TANAKA TAKAYASU, KUROSAKI KOJI, NAGAOKA SHIGERU
• Format: Patent
• Language: English; Japanese
• Published: 08.02.2018
• Subjects: CHEMISTRY; CINEMATOGRAPHY; COMPOUNDS CONTAINING METALS NOT COVERED BY SUBCLASSESC01D OR C01F; ELECTROGRAPHY; ELECTROPHOTOGRAPHY; HOLOGRAPHY; INORGANIC CHEMISTRY; MAGNETOGRAPHY; METALLURGY; PHOTOGRAPHY; PHYSICS

PROBLEM TO BE SOLVED: To provide strontium titanate-based fine particles good in dispersion, environmental property and fluidization and capable of being alternative of hydrophobic titanium dioxide as a toner external additive, and a manufacturing method therefor.SOLUTION: There are provided strontium titanate-based fine particles containing a perovskite type titanium oxide compound represented by the general formula SrTiOas a main component, a third component M selected from La, Mg, Ca, SN and Si and having molar ratio of (Sr+M) to Ti:(Sr+M)/Ti in a range of 0.70 to 0.90, a spherical shape with average circularity of 0.80 to 1.00, average primary particle diameter of 0.02 μm to 0.06 μm and a value of quartile deviation of the primary particle diameter divided by the average primary particle diameter of less than 0.20.SELECTED DRAWING: None 【課題】分散、環境特性および流動化性が良好で、トナー外添剤として疎水性二酸化チタンの代替物となり得るチタン酸ストロンチウム系微細粒子及びその製造方法を提供する。【解決手段】一般式ＳｒＴｉＯ３で示されるペロブスカイト型チタン酸化合物を主成分とし、Ｌａ、Ｍｇ、Ｃａ、Ｓｎ及びＳｉから選択される第３成分Ｍを含み、Ｔｉに対する（Ｓｒ＋Ｍ）のモル比：（Ｓｒ＋Ｍ）／Ｔｉが０．７０〜０．９０の範囲にあり、平均円形度０．８０〜１．００の球状を有し、平均一次粒子径が０．０２μｍ〜０．０６μｍ、一次粒子径の四分偏差を平均一次粒子径で割った値が０．２０未満であるチタン酸ストロンチウム系微細粒子。【選択図】なし