Development of a New Special Investment for Dental Cast Ti System

Chen Yuyong Xu Lijuan Chen Ziyong Xiao Baichun

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Development of a New Special Investment for Dental Cast Ti System
Issue 8, Pages: 462-464(2005)
Published： 2005 ，
DOI：

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[1]陈玉勇,徐丽娟,陈子勇,肖柏青.新型牙科铸钛专用包埋料的研制[J].特种铸造及有色合金,2005(08):462-464+446.

Chen Yuyong Xu Lijuan Chen Ziyong Xiao Baichun. Development of a New Special Investment for Dental Cast Ti System. [J]. Special Casting & Nonferrous Alloys (8):462-464(2005)
[1]陈玉勇,徐丽娟,陈子勇,肖柏青.新型牙科铸钛专用包埋料的研制[J].特种铸造及有色合金,2005(08):462-464+446. DOI：

Chen Yuyong Xu Lijuan Chen Ziyong Xiao Baichun. Development of a New Special Investment for Dental Cast Ti System. [J]. Special Casting & Nonferrous Alloys (8):462-464(2005) DOI：

摘要

研究了自制磷酸盐包埋料焙烧温度与膨胀率及膨胀系数之间

焙烧温度、固化时间与抗拉强度之间的关系

以及室温条件下一次包埋时包埋料与纯钛的界面反应情况。结果表明:包埋料的最大凝固膨胀率为0.1%

800℃的热膨胀率为0.46%

总膨胀率为0.56%

完全可以满足实际义齿铸造的要求。焙烧后抗拉强度在0.3

.35MPa之间

正常固化24h后

包埋料的抗拉强度为2.35MPa

已经能够满足铸造过程的需要。Zr、P元素在纯钛中的扩散很小

可以忽略不计。金属元素Mg的扩散深度约为6μm

Al的扩散深度约为20μm

Si的扩散深度约为15μm

可以通过表面处理来保证铸件质量。

Abstract

The relationships between baking temperature of self-developed prosthodontia investment and expansion rate

expansion coefficient as well as and solidifying time

tensile strength were investigated

and the interface reaction of investment material with pure Ti at ambient temperature one-cladding was observed.The result shows that the investment materials can completely meet the requirement of actual false teeth manufacturing due to its maximum solidifying expansion rate of 0.1% and thermal expansion rate of 0.46[WTXT]% at 800 ℃ as well as totally expansion rate of 0.56%.Tensile strength of baked materials is in the range of 0.3～0.35 MPa

and the tensile strength of the materials is 2.35 MPa after solidified for 24 hours

which can meet the demand of casting process.Zr and P can be ignored due to its little diffusion in pure Ti.The castings quality can be controlled by surface treatment for Mg spreading depth of 6 μm

Al of 20μm and Si of 15 μm in the cast Ti system.