Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Yttrium-stabilized zirconia powder and preparation method thereof
The invention relates to the technical field of zirconium oxide powder materials, and particularly provides yttrium-stabilized zirconium oxide powder and a preparation method thereof. The yttrium-stabilized zirconium oxide powder is prepared from the following components in percentage by mole: 0.8 to 2.5 percent of Y2O3 and 97.5 to 99.2 percent of ZrO2; the preparation method comprises the following steps: dissolving a water-soluble yttrium salt, a water-soluble zirconium salt and a dispersing agent into water to prepare a solution A with the salt concentration of 1.0-2.5 mol/L; synchronously dropwise adding the solution A and an ammonium bicarbonate aqueous solution with the weight concentration of 10-20% into a reactor, and controlling the dropwise adding speed of the ammonium bicarbonate aqueous solution to enable the pH value of a reaction system to be 8.5-9.5; after dropwise adding, dehydrating, dispersing the collected precipitate into a second surfactant aqueous solution of which the volume is 3-10 times that of the precipitate, stirring for 30-60 minutes, dehydrating, continuously washing with water, and dehydrating for 2-8 times to obtain a water washing product; and heating the washed product to 800-900 DEG C, calcining for 1.5-3.5 hours, cooling, and crushing to obtain the product. The yttrium-stabilized zirconia powder disclosed by the invention has the characteristics of uniform composition and relatively low monoclinic phase content, and can be used as a toughening agent for toughening ZTA ceramics.
本申请涉及氧化锆粉体材料技术领域，具体提供一种钇稳定氧化锆粉体及其制备方法。钇稳定氧化锆粉体，按100%摩尔，组成为0.8‑2.5%Y2O3·97.5‑99.2%ZrO2；制备方法为，将水溶性钇盐、水溶性锆盐和分散剂溶解到水中，配制成盐浓度为1.0‑2.5mol/L的溶液A；将溶液A和重量浓度10‑20%的碳酸氢铵水溶液同步滴加到反应器中，控制所述碳酸氢铵水溶液的滴加速度使得反应体系的pH为8.5‑9.5；滴加完，脱水，收集的沉淀分散到沉淀3‑10倍体积的第二表面活性剂水溶液中，搅拌30‑60min，脱水，继续用水洗涤、脱水2‑8次，获得水洗产物；水洗产物升温至800‑900℃煅烧1.5‑3.5小时，冷却，破碎，即得。本申请的钇稳定氧化锆粉体具有组成均匀、单斜相含量较低的特点，可作为增韧剂用于ZTA陶瓷的增韧。
Yttrium-stabilized zirconia powder and preparation method thereof
The invention relates to the technical field of zirconium oxide powder materials, and particularly provides yttrium-stabilized zirconium oxide powder and a preparation method thereof. The yttrium-stabilized zirconium oxide powder is prepared from the following components in percentage by mole: 0.8 to 2.5 percent of Y2O3 and 97.5 to 99.2 percent of ZrO2; the preparation method comprises the following steps: dissolving a water-soluble yttrium salt, a water-soluble zirconium salt and a dispersing agent into water to prepare a solution A with the salt concentration of 1.0-2.5 mol/L; synchronously dropwise adding the solution A and an ammonium bicarbonate aqueous solution with the weight concentration of 10-20% into a reactor, and controlling the dropwise adding speed of the ammonium bicarbonate aqueous solution to enable the pH value of a reaction system to be 8.5-9.5; after dropwise adding, dehydrating, dispersing the collected precipitate into a second surfactant aqueous solution of which the volume is 3-10 times that of the precipitate, stirring for 30-60 minutes, dehydrating, continuously washing with water, and dehydrating for 2-8 times to obtain a water washing product; and heating the washed product to 800-900 DEG C, calcining for 1.5-3.5 hours, cooling, and crushing to obtain the product. The yttrium-stabilized zirconia powder disclosed by the invention has the characteristics of uniform composition and relatively low monoclinic phase content, and can be used as a toughening agent for toughening ZTA ceramics.
本申请涉及氧化锆粉体材料技术领域，具体提供一种钇稳定氧化锆粉体及其制备方法。钇稳定氧化锆粉体，按100%摩尔，组成为0.8‑2.5%Y2O3·97.5‑99.2%ZrO2；制备方法为，将水溶性钇盐、水溶性锆盐和分散剂溶解到水中，配制成盐浓度为1.0‑2.5mol/L的溶液A；将溶液A和重量浓度10‑20%的碳酸氢铵水溶液同步滴加到反应器中，控制所述碳酸氢铵水溶液的滴加速度使得反应体系的pH为8.5‑9.5；滴加完，脱水，收集的沉淀分散到沉淀3‑10倍体积的第二表面活性剂水溶液中，搅拌30‑60min，脱水，继续用水洗涤、脱水2‑8次，获得水洗产物；水洗产物升温至800‑900℃煅烧1.5‑3.5小时，冷却，破碎，即得。本申请的钇稳定氧化锆粉体具有组成均匀、单斜相含量较低的特点，可作为增韧剂用于ZTA陶瓷的增韧。
Yttrium-stabilized zirconia powder and preparation method thereof
一种钇稳定氧化锆粉体及其制备方法
ZHENG SIYU (Autor:in)
26.01.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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