{"id":313,"date":"2026-09-27T11:45:15","date_gmt":"2026-09-27T03:45:15","guid":{"rendered":"https:\/\/zirconia-ceramics.com\/?p=313"},"modified":"2026-09-27T11:45:15","modified_gmt":"2026-09-27T03:45:15","slug":"%e3%82%b8%e3%83%ab%e3%82%b3%e3%83%8b%e3%82%a2%e3%83%9c%e3%83%bc%e3%83%ab%e3%81%af%e3%80%81%e7%b2%89%e7%a0%95%e6%a9%9f%e3%81%ae%e4%b8%ad%e3%81%a7%e3%81%9d%e3%81%ae%e5%ad%98%e5%9c%a8%e4%be%a1%e5%80%a4","status":"publish","type":"post","link":"https:\/\/zirconia-ceramics.com\/ja\/a-zirconia-ball-earns-its-keep-in-the-mill\/","title":{"rendered":"\u30b8\u30eb\u30b3\u30cb\u30a2\u30dc\u30fc\u30eb\u306f\u3001\u30df\u30eb\u3067\u305d\u306e\u5b58\u5728\u4fa1\u5024\u3092\u767a\u63ee\u3057\u3066\u3044\u308b"},"content":{"rendered":"

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A Zirconia Ball Earns Its Keep in the Mill, Not on the Spec Sheet People compare zirconia balls to alumina by hardness and get the wrong answer. Alumina is often a bit harder. That is not why a high-energy mill ends up on yttria- or ceria-stabilized zirconia. The useful numbers are density, toughness, and how much of the bead is still a bead after a month of tip speed. A good Y-TZP ball is roughly 95% ZrO\u2082 with about 5% Y\u2082O\u2083, sintered dense, fine-grained, tetragonal. Density sits near 6.0 g\/cm\u00b3. Ceria-stabilized media can run a little higher, around 6.2. Ninety-two percent alumina is about 3.6\u20133.7. Glass is in the mid-2s. […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"ngg_post_thumbnail":0,"footnotes":""},"categories":[21],"tags":[],"class_list":{"0":"post-313","1":"post","2":"type-post","3":"status-publish","4":"format-standard","6":"category-knowledge","7":"czr-hentry"},"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/zirconia-ceramics.com\/ja\/wp-json\/wp\/v2\/posts\/313"}],"collection":[{"href":"https:\/\/zirconia-ceramics.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/zirconia-ceramics.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/zirconia-ceramics.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/zirconia-ceramics.com\/ja\/wp-json\/wp\/v2\/comments?post=313"}],"version-history":[{"count":1,"href":"https:\/\/zirconia-ceramics.com\/ja\/wp-json\/wp\/v2\/posts\/313\/revisions"}],"predecessor-version":[{"id":314,"href":"https:\/\/zirconia-ceramics.com\/ja\/wp-json\/wp\/v2\/posts\/313\/revisions\/314"}],"wp:attachment":[{"href":"https:\/\/zirconia-ceramics.com\/ja\/wp-json\/wp\/v2\/media?parent=313"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/zirconia-ceramics.com\/ja\/wp-json\/wp\/v2\/categories?post=313"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/zirconia-ceramics.com\/ja\/wp-json\/wp\/v2\/tags?post=313"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}