Alumina Spherical Powder

Alumina Spherical Powder

Alumina Spherical Powder is a white powder with a purity of 99.9% to 99.999%. It has a high α-phase content, excellent stability, high crystallinity, and uniform particle size. The spherical shape ensures a uniform distribution and improves its flowability and packing density, making it has excellent thermal conductivity. Advanced Ceramics Hub can supply high-quality alumina (Al2O3) spherical powder in the BAK series, Top Cut Series, BAH Series, and BAM Series to meet diverse industrial and research requirements.

Alumina Spherical Powder BAK Series Specifications

The BAK series is manufactured by calcining ordinary irregular Al2O3 using a high-temperature melting and spheroidizing injection method, followed by purification, screening, and other processes. The BAK series is widely used as a thermally conductive interface material, thermally conductive engineering plastic, and thermally conductive filler for aluminum-based copper-clad laminates, owing to its excellent thermal conductivity and fluidity.

Properties		Unit	BAK-1	BAK-2	BAK-5	BAK-10	BAK-15	BAK-20	BAK-30	BAK-40	BAK-70	BAK-90	BAK-120
Particle Size	D10	μm	0.58	0.69	2.54	4.18	7.03	10.5	16.88	23.77	44.32	55.23	90.95
	D50	μm	1.03	2.18	5.52	10.03	15.11	20.8	30.52	41.54	71.54	87.96	122.39
	D90	μm	2.14	5.24	9.09	18.46	24.06	37.24	48.87	66.44	106.5	134.92	172.72
Specific Surface Area		m2/g	1.69	1.27	0.36	0.17	0.14	0.11	0.1	0.07	0.05	0.06	0.06
Electricity Conductivity		μS/cm	6.07	5.40	5.65	4.05	1.83	6.87	7.95	4.65	6.18	8.15	2.6
PH Value		—	7.53	7.79	7.7	7.41	7.37	7.62	7.39	7.31	7.42	7.3	7.44
Moisture		%	0.05	0.03	0.03	0.03	0.03	0.03	0.03	0.03	0.05	0.03	0.03
True Density		g/cm3	3.71	3.71	3.74	3.76	3.86	3.79	3.75	3.81	3.87	3.88	3.81
Spheroidization Rate		%	96	98	98	98	96	96	98	96	96	95	96
Chemical Composition	Al2O3	%	99.93	99.94	99.93	99.94	99.93	99.94	99.94	99.94	99.94	99.94	99.94
	SiO2	ppm	445	373	424	358	430	352	333	349	342	330	359
	Fe2O3	ppm	152	120	176	136	158	144	161	148	158	164	133
	Na2O	ppm	103	107	100	106	112	104	106	103	100	106	108

Alumina Spherical Powder Top Cut Series Specifications

The Top Cut Series is an optimized version of the BAK series, featuring high sphericity, high filling rate, high thermal conductivity, and a narrow particle size distribution. It is widely used in applications such as epoxy molding compounds, thermal interface materials, thermally conductive engineering plastics, and thermally conductive substrates.

Product	Particle Size（μm）				Specific Surface Area	Electricity Conductivity	PH	Moisture	True Density	Spheroidization Rate
	D10	D50	D90	D97	㎡ /g	μS/cm	–	%	g/cm³	%
BAK-5-25C	3.25	5.77	10.36	15.6	0.38	2.64	6.79	0.03	3.7	96
BAK-10-35C	4.52	9.32	18.11	22.1	0.22	5.81	7.33	0.02	3.82	96
BAK-15-45C	9.28	16.81	27.68	33.88	0.12	3.77	6.8	0.03	3.78	97
BAK-30-75C	16.16	31.78	52.47	60.87	0.09	3.77	7.05	0.03	3.8	96
BAK-40-75C	21.98	39.63	63.49	75.93	0.09	4.68	6.82	0.03	3.79	96
BAK-70-120C	51.54	73.37	98.43	111.7	0.06	5.31	6.97	0.02	3.79	95

Alumina Spherical Powder BAH Series Specifications

The BAH Series is a product that has been blended and modified, primarily used as thermal interface materials (e.g., thermally conductive silicone pads, thermally conductive greases, thermally conductive potting compounds, thermally conductive tapes, phase change materials, etc.) and thermally conductive engineering plastics (e.g., LED light covers, switch housings, electronic product enclosures, and heat dissipation components for electrical products). We can provide different types of modified products based on specific application needs.

Properties		Unit	BAH-2H4	BAH-5H4	BAH-10H4	BAH-20H4	BAH-40H4	BAH-70H4	BAH-90H4	BAH-120H4
Particle Size	D10	μm	0.71	2.33	4.18	11.96	24.92	44.28	53.44	94.33
	D50	μm	2.15	5.59	10.03	21.56	42.49	71.45	88.27	122.18
	D90	μm	4.24	9.38	18.46	36.81	65.99	106.5	133.24	168.18
Specific Surface Area		m2/g	0.65	0.17	0.09	0.07	0.05	0.02	0.01	0.01
Electricity Conductivity		μS/cm	1.76	1.15	1.05	0.94	1.72	1.78	2.87	1.93
PH Value		—	7.13	7.23	6.79	6.75	7.00	6.98	6.78	7.13
Moisture		%	0.04	0.04	0.04	0.04	0.03	0.04	0.04	0.04
True Density		g/cm3	3.62	3.78	3.78	3.81	3.77	3.83	3.83	3.79
Spheroidization Rate		%	96	96	96	96	96	96	95	95
Chemical Composition	Al2O3	%	99.12	99.51	99.53	99.63	99.73	99.72	99.71	99.73
	SiO2	ppm	432	453	312	387	396	376	384	359
	Fe2O3	ppm	175	165	134	153	173	164	176	181
	Na2O	ppm	105	103	116	115	172	107	113	106

Alumina Spherical Powder BAM Series Specifications

The BAM series is manufactured by blending the BAK series with different particle sizes to enhance thermal conduction efficiency. The BAM has a better filling capacity, a more optimized particle distribution, and effectively improves the heat transfer efficiency of the thermal conduction channels.

Product	Particle Size（μm）			Specific Surface Area	Electricity Conductivity	PH	Moisture	True Density	Spheroidization Rate	Al2O3	SiO2	Fe2O3	Na2O
	D10	D50	D90	㎡ /g	μS/cm	–	%	g/cm³	%	%	ppm	ppm	ppm
BAM-5M5	1.5	5.73	11.08	0.36	4.23	7.58	0.03	3.76	96	99.93	415	174	111
BAM-10M6	1.492	8.91	17.88	0.26	3.74	7.59	0.03	3.8	96	99.94	333	163	104

Alumina Powder Fine Particle Solutions

Alumina Spherical Powder Advantages

• Outstanding Flowability
• High Packing Density
• Particle Uniformity
• High Purity and Chemical Stability
• Superior Mechanical Properties
• Efficient Processing

Alumina Spherical Powder Applications

• Advanced Ceramics: Produces strong, durable ceramics.
• Thermal Spray Coatings: Creates heat- and corrosion-resistant coatings.
• Catalyst Supports: Used in chemical and environmental catalysts.
• Abrasive Manufacturing: Makes grinding wheels and polishing materials.
• Composite Materials: Boosts heat resistance.
• Additive Manufacturing: 3D prints precise ceramic parts.

Alumina Spherical Powder Packaging

The Alumina Spherical Powder is carefully placed in wooden cases or cartons with additional support from soft materials to prevent any shifting during transportation. This packaging method guarantees the integrity of the products throughout the delivery process.