TONER

Provided is toner that contains a toner particle, and an external additive containing a strontium titanate particle, wherein the toner has an average circularity of at least 0.935 and not more than 0.995, the strontium titanate particle has a number-average primary particle diameter of at least 10 n...

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Bibliographische Detailangaben
Hauptverfasser: NISHIKAWA, Koji, TANAKA, Keisuke, NAGATA, Ryo, FURUI, Takaaki, SATO, Kazuyuki, YOSHIDA, Yu, HOTTA, Yojiro, TERAUCHI, Kazuo, FUJIMOTO, Masami, KOSAKI, Yusuke
Format: Patent
Sprache:eng ; fre ; ger
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Zusammenfassung:Provided is toner that contains a toner particle, and an external additive containing a strontium titanate particle, wherein the toner has an average circularity of at least 0.935 and not more than 0.995, the strontium titanate particle has a number-average primary particle diameter of at least 10 nm and not more than 60 nm, the strontium titanate particle has a peak in the range of 39.700° ± 0.150° and a peak in the range of 46.200° ± 0.150° in a CuK± x-ray diffraction spectrum obtained in the 2¸ range of at least 10° and not more than 90° where ¸ is the Bragg angle, and the ratio of the area Sb of the peak at 46.200° ± 0.150° to the area Sa of the peak at 39.700° ± 0.150° is at least 1.80 and not more than 2.30.