Preparation of ceramic gas burner head from zero-expansion potassium zirconium phosphate

零膨胀磷酸锆钾盐制备陶瓷燃气烧嘴头

• 批准号: 07555579
• 负责人: OTA Toshitaka
• 金额: $ 3.2万
• 依托单位: Nagoya Institute of Technology
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for Scientific Research (A)
• 财政年份: 1995
• 资助国家: 日本
• 起止时间: 1995 至 1997
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-07555579/
• 关键词: Ceramics; burner-head; Potassium zirconium phosphate; thermal expansion

Some compounds in the NaZr_2 (PO_4) _3 family have been reported in recent years to be low thermal expansion materials. In particular, KZr_2 (PO_4) _3 [KZP] ceramic showed a near zero thermal expansion, since the thermal expansion coefficients of KZP crystal were alpha_a= -4.4*10^<-6>/ﾟC,alpha_c= +7.6*10^<-6>/ﾟC,and alpha_<avg>= -0.4*10^<-6>/ﾟC.Consequently, the KZP ceramic is expected to have an exellent thermal shock resistance. In this work, a ceramic gas burner-head was developed from KZP.KZP was synthesized by calcining at 1200-1300ﾟC for 2 h from (ZR) _2P_2O_7 and KH_2PO_4. Sintering of KZP ceramic was promoted by adding ametal oxide such as MgO.The dense KZP ceramic was prepared by sintering at 1250-1350ﾟC.The maximum strength of KZP ceramic was about 150MPa. The linear thermal expansion coefficient of KZP ceramic was near zero. KZP ceramic burner-head was formed by die-pressing of KZP semi-dry powder. As regarding thermal shock resistance, the obtained KZP ceramic burner-head did not crack by quenching from 800ﾟC into ice water, and even after the quenching from 800ﾟC was repeated several times.

近年来报道NaZr_2(PO_4)_3族中的一些化合物是低热膨胀材料。特别是KZr_2 (PO_4) _3 [KZP]陶瓷表现出接近于零的热膨胀，因为KZP晶体的热膨胀系数为alpha_a= -4.4*10^<-6>/ﾟC，alpha_c= +7.6*10^<-6>/ﾟC，且alpha_<avg>= -0.4*10^<-6>/ﾟC。因此，KZP陶瓷有望具有优异的耐热震性。本工作以KZP为原料开发了一种陶瓷燃气燃烧器头。KZP是由(ZR)_2P_2O_7和KH_2PO_4在1200-1300℃下煅烧2小时合成的。通过添加MgO等金属氧化物促进KZP陶瓷的烧结。在1250-1350℃下烧结制备出致密的KZP陶瓷。KZP陶瓷的最大强度约为150MPa。 KZP陶瓷的线性热膨胀系数接近于零。 KZP陶瓷烧嘴由KZP半干粉模压而成。就耐热震性而言，所获得的KZP陶瓷烧嘴在冰水中从800℃淬火后，甚至在多次从800℃淬火后也没有破裂。

项目成果

N.Katagiri et al.: "Preparation of Gas-Burner Head made of KZr_<> (PO_4) _3 Ceramic" Annual Report of CRL,Nagoya Inst.of Tech.Vol.7. 31-33 (1997)

N.Katagiri 等：“KZr_<>(PO_4)_3 陶瓷制成的燃气燃烧器头的制备”CRL 年度报告，名古屋工业研究所，第 7 卷。

片桐 成人: "KZr_2(PO_4)_3セラミック製ガスバーナーヘッドの試作" 名古屋工業大学セラミックス研究施設年報. 7. 31-33 (1997)

片桐正人：“KZr_2(PO_4)_3陶瓷燃气燃烧器头的原型”名古屋工业大学陶瓷研究设施年报7. 31-33 (1997)。

片桐成人: "KZr_2(PO_4)_3セラミック製ガスバーナーヘッドの試作" 名古屋工業大学セラミックス研究施設年報. 7巻. 31-33 (1997)

Shigeto Katagiri：“KZr_2(PO_4)_3陶瓷燃气燃烧器头的原型”名古屋工业大学陶瓷研究设施年度报告第7卷31-33(1997)。