YS/T 438.5-2013Methods for physical performance determination of Sandy alumina. Part 5: X-ray diffraction spectrum method for detemination of α-alumina content (English PDF)

Foreword

YS/T 438 "sandy alumina determination of physical performance" is divided into five sections.

--- Part 1. Determination of particle size distribution by sieving;

--- Part 2. Determination of the abrasion index;

--- Part 3. Determination of angle of repose;

--- Part 4. Determination of specific surface area;

--- Part 5. Determination of alpha- alumina content of X- ray diffraction.

This is Part 5.

The partial replacement of YS/T 438.5-2001 "Determination of alpha- alumina content of sandy alumina determination of physical performance X-ray diffraction method." this part is the "determination of alpha- alumina content of sandy alumina determination of physical performance X-ray diffraction method" YS/T 438.5-2001 of Revised, compared with YS/T 438.5-2001, the main changes are as follows.

--- Increased reagent Chapter 3;

--- Increased precision;

--- Increase the content quality assurance and control.

This section drafted in accordance with GB/T 1.1-2009 given rules.

The non-ferrous metal part by the National Standardization Technical Committee (SAC/TC243) centralized.

This part mainly drafted by. Aluminum Corporation of China Guangxi Branch, Luoyang Xiangjiang Wanji Aluminum Co., Ltd.

1 Scope

This section provides a method for determining X- ray diffraction sandy alumina content of the alpha-Al2O3.

This section applies to the determination of sandy alumina content in alpha-Al2O3. Measuring range. <=20.0%.

2 Method summary

In the same diffraction conditions were samples and standard samples (012) crystal face of the integrated intensity values measured in accordance with standard samples containing the alpha-Al2O3 the amount of the sample to calculate the content of alpha-Al2O3.

3 Reagents

3.1 high purity alumina (99.99%).

3.2 aluminum hydroxide.

3.3 ethanol.

3.4 corundum crucible (100mL).

4 Instrument

4.1 agate mortar.

4.2 X- ray diffraction. General Instrument stability better than 0.5%, work on indicators see Appendix A.

4.3 Oven. Maximum operating temperature 300 °C ± 5 °C.

4.4 high-temperature furnace. maximum operating temperature of 1600 °C ± 5 °C.

5 Sample Preparation

5.1 The high purity alumina (3.1) in 100mL corundum crucible (3.4) was packed to 2/3, at 1450 °C ± 20 °C baking after 6h the resulting alumina regarded as containing alpha-Al2O3 (100.0%).

5.2 aluminum hydroxide (3.2) placed in 100mL corundum crucible (3.4) was packed to 2/3, after 700 °C ± 20 °C baking 4h prepared Alumina deemed free of alpha-Al2O3.

5.3 A sample (5.1), (5.2) drying 2h at 105 °C ± 5 °C, dubbed by the mass ratio alpha-Al2O3 content of 0,5.0%, 10.0%, respectively, 15.0%, 20.0% of the standard sample, and mix thoroughly ground to a particle size of less than 10µm.

6 Measuring step

6.1 adjusting X diffractometer (4.2) to reach a steady state measurement requirements.