Industrial Technical High Purity Alumina Structure Ceramics

• Standard: GB, ISO
• Application: Cement Plant, Mining Machine, Thermal Power Plant, Coal Yard
• Material: Alumina Ceramic
• Type: Wear Resistant Ceramic
• Alumina Content: 92% or 95%
• Density: 3.6-3.7 g/cm3
• Model NO.: chemshun advanced ceramics
• Transport Package: Carton+Pallet
• Specification: Customized
• Trademark: CHEMSHUN CERAMICS
• Origin: China
• HS Code: 69091200
• Production Capacity: 5000 Tons/Year

Product Description

Industrial Technical High Purity Alumina Structure Ceramics





Product Description
Aluminum oxide (Alumina) has an extensive application due to its versatility and low cost of material than other advanced ceramics. Alumina offers high electrical insulation resistance, high-temperature resistance, strong hardness, wear resistance, and good chemical stability, making it a good material to withstand high temperature and chemical corrosion.
Our factory produces a selection of purity of alumina from 75% to 99.8%, all of the ceramic parts we supplied are with a dense body via dry pressing, hot pressing, ceramic injection molding, and ISO pressing. In order to achieve some special application for fitting, reducing the friction, increasing the insulation, we provide a serial of secondary processes after sintering, covering CNC machining, polishing, glazing, and metalizing.
We manufacture a wide range of alumina ceramic rings, including ceramic tubes, ceramic rings, ceramic disc, ceramic rod, ceramic arms, ceramic wire guides. Whatever, its a prototyping case, or high volume demand, we believe we are able to provide you a desirable solution.

The accuracy achieved after precision machining
- Axis: roundness 0.002 mm, concentricity 0.002 mm, smoothness Ra0.1;
- Hole: the minimum processing hole diameter is 0.2 mm and the depth is up to 6mm;
- Slot: min. value to be  0.1 mm  of narrow groove, and grooves with custom shapes;
- Plane: 0.1mm sheet with minimum processable thickness, parallelism 0.001mm, measurement tolerance 0.001 mm, finish Ra0.1; 
- Thread: The minimum machinable M2 internal thread, the accuracy of GB-7h, the external thread size is not limited, the accuracy is GB-6g.

The main characteristics of the technical ceramic parts
- High hardness, it is can be up to 1700 HV, and Super compressive strength up to 2240 Mpa
- High heat resistance: Alumina ceramic parts offer excellent thermal stability, which means that it is widely used in areas where resistance to high temperatures is essential.
- Good wear resistance: it is an ideal  choice  to wear parts in high abrasive industry
- High electrical resistivity: used in all-electric products, electric heating products, and wear-resistant machinery parts.
- High corrosion resistance: It is insoluble in water and only slightly soluble in strong acid and alkaline solutions. Good chemical stability of alumina leads to high corrosion resistance.
- They are more cost-effective ceramic parts with equivalent performance among all other technical ceramics
- They offer different grade dimensional accuracy per sintered only, precision machining 
- We support a variety of customized alumina ceramic parts base on customer's drawing, sample, or reference parameters

Technical Data Sheets

Option Materials	alumina, zirconia, silicon carbide, silicon nitride, steatite optional
Outer diameter	0.5 ~800 mm
Length	1~1000mm
Roughness	To be Ra0.05
Surface treatment	Polished, Glazed, Metalized availability
Cosmetic	Smooth surface without no contamination, deformation, and crack

 

Property	Units	Materials
		99.5%Al2O3	99%Al2O3	95%Al2O3	ZrO2	Si3N4
Density	g/cm3	≥3.85	≥3.80	≥3.60	≥6.0	≥3.2
Water absorption	%	0	0	0	0	0
Hardness	HV	1700	1700	1500	1300	1550
Flexural strength	Mpa	≥379	≥338	≥320	≥1200	≥600
Compressive strength	Mpa	≥2240	≥2240	≥2000	≥1990	≥2500
Fracture toughness	Mpa m1/2	4-5	4-5	3-4	6.5-8	6
Max. service temperature	ºC	1675	1600	1500	1000	1200
(Non-loading)
CTE (20-800ºC)	1×10 -6 /ºC	6.5~8.0	6.2~8.0	5.0~8.0	8.0~9.5	3.1
Thermal shock	T(ºC)	≥250	≥200	≥220	≥300	≤1000
Thermal conductivity(25ºC)	W/m.k	30	29	24	3	15~20
Volume resistivity (25ºC )	ohm.cm	>1 x 10 14	>1 x 10 14	>1 x 10 14	>1 x 10 11	>1 x 10 12
Insulation strength	KV/mm	19	18	18	17
Dielectric constant(1Mhz)	(E)	9.7	9.5	9.5	29