GB/T 31968-2015 in English
SUPERSEDEDRare earth composite yttrium zirconium oxide ceramic powder
- Issued on:2015-09-11
- Implemented on:2016-08-01
- File Format:PDF
- Delivery:Via email within 1~3 business days
$107.00
《GB/T 31968-2015稀土复合钇锆陶瓷粉》由TC229（全国稀土标准化技术委员会）归口，主管部门为国家标准化管理委员会。
本标准规定了稀土复合钇锆陶瓷粉的要求、试验方法、检验规则与包装、标志、运输、贮存及质量证明书。
本 标准适用于化学法制得的稀土复合钇锆陶瓷粉,供制作功能元件、齿科医学材料、陶瓷磨介等用。
Introduction
GB/T31968-2015 Standard Overview
GB/T31968-2015 "Rare Earth Composite Yttrium Zirconium Ceramic Powder" is my country's first national standard for rare earth composite yttrium zirconium ceramic powder materials, aiming to standardize product requirements, test methods and quality control.
Background of Standard Formulation
With the rapid development of functional ceramics, dental medical materials and other fields, the demand for high-performance ceramic powders is growing. The formulation of this standard fills the gap in the field of rare earth composite yttrium zirconium ceramic powder in China and provides an important guarantee for product quality.
Comparison analysis of technical indicators
| Product brand | Chemical composition (mass fraction)/% | Physical performance requirements | Appearance quality requirements |
|---|---|---|---|
| YZ 5.25 QL A | Y₂O₃:5.25±0.25, Fe₂O₃≤0.002, SiO₂≤0.01 | Central particle size D[V,50]: <0.1 μm, bulk density ρ_ac: not specified, specific surface area BET:5-10 m²/g | White powder, no visible inclusions |
| YZ 7.2 QL B | Y₂O₃:7.2±0.25, ZrO₂(HfO₂): Remainder | Central particle size D[V,50]：0.6-1.0 μm, Apparent density ρ_ac:1.2-1.45 g/cm³, Specific surface area BET:10-18 m²/g | White powder, no visible inclusions |
Practical application case analysis
Rare earth composite yttrium zirconium ceramic powder is widely used in:
- Functional component manufacturing
- Dental medical materials
- Ceramic grinding media production
Key points of quality control
In actual production, it is necessary to focus on the precise control of chemical composition and the stability of physical properties. For example:
- The deviation of chemical composition shall not exceed ±0.25%
- The specific surface area must meet the design requirements
- The particle size distribution should be uniform to avoid particles that are too large or too small affecting the quality of the final product
Implementation suggestions
To ensure the effective implementation of the standard:
- Establish a complete quality inspection system
- Strengthen employee training and improve operational standardization
- Establish long-term cooperative relationships with suppliers to ensure raw material consistency
- Regularly verify and optimize product performance
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