Al2O3 Alumina Aluminium Oxide Ceramic Insulators UPT-ALC028 manufacturer from China Xiamen Unipretec Advanced Materials Co.,Ltd

Al2O3 Alumina Aluminium Oxide Ceramic Insulators

Price:	5.0~6.0 USD
Payment Terms:	T/T,WU
Place of Origin:	Fujian, China (Mainland)


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Product Detail

Model No.: UPT-ALC028

Production Capacity: 80000pcs/year

Delivery Date: 40days

Material: Alumina

Color: White

Young's Modulus: 280Gpa

Compressive Strength: 2000Mpa

Thermal shock resistance: 220ΔT(C°)

Means of Transport: Ocean,Air

Packing: wooden box / carton box

Brand Name: UNIPRETEC

Purity: 95%

Density: 3.65g/cm3

Flexural Strength: 280Mpa

Thermal Conductivity: 18-25W/(m•K)

Max. Working Temperature: 1500℃

Unipretec can supply Alumina Ceramics / Zirconia Ceramics / Machinable Glass Ceramics / Boron Nitride / Silicon Nitride.

Ceramic Insulators are manufactured from high purity alumina e.g 96%, 98% & 99.7 % depending on the application. These materials exhibit excellent electrical resistivity, low dielectric constant, very low dielectric loss factor and high dielectric strength. The electrical properties change only insignificant at high temperatures.

Alumina is the most mature of the engineering ceramics, offering excellent electrical insulation properties together with high hardness and good wear resistance but relatively low strength and fracture toughness.

Different Types of Alumina Ceramics

Aluminas are generally white but are sometimes pink (88% alumina) or brown (96% Alumina). The colour is derived from either the sintering additives or impurities in the raw materials. Unipretec produces a range of alumina from 96% - 99.9% purity.

Properties of Alumina Ceramics

Alumina has a high melting point, high hardness and high mechanical strength, although mechanical strength is reduced at temperatures above 1000°C. Due to the relatively large coefficient of thermal expansion, thermal shock resistance is reduced. Alumina is an electrically insulating material, with a high electrical resistivity, increasing with purity.Good chemical stability of alumina, leads to a high corrosion resistance. It is insoluble in water and only slightly soluble in strong acid and alkaline solution.

Characteristics	Unit	95 Al2O3	99 Al2O3	ZrO2	GPSi3N4	BN	Glass Ceramic
Crystal Structure	-	hexagonal	hexagonal	tetragonal	hexagonal	hexagonal	-
Color	-	white	ivory	white	gray	white	white
Density	g/cm3	3.65	3.88	5.95	3.22	2.26	2.55
Water Absorption	%	0	0	0	0	0.0-1.0	0
Young's Modulus	Gpa	280	350	205	295	670	65
Vickers Hardness	Gpa	14	20	12	18-20	-	-
Flexural Strength @R.T.	Mpa	280	300	900	650	51	100
Compressive Strength @R.T.	Mpa	2000	2500	2200	2200	230	500
Thermal Conductivity @R.T.	W/(m*k)	18-25	30	2.2	25	20	1.7
Thermal shock resistance	Δ(℃)	220	180-200	280-350	450-650	>1500	25-100
Max. Working Temperature @R.T.	℃	1500	1700	850	1200	960	800
Volume Resistivity @R.T.	Ω*cm	>10^15	>10^14	>10^12	>10^14	10^13	10^16
Dielectric Constant (1 MHz @R.T. )	-	9.5	9.8	26	8.2	4.08	6.02
Dielectric Strength	kV/mm	16	22	-	16	375	40

Various Application of Alumina Ceramics

*Seal rings

*Medical prostheses

*Laser tubes

*Electronic substrates

*Ballistic armour

*Thermocouple tubes

*Electrical insulators

*Grinding media

*Threadguides

*Wear components

Al2O3 Alumina Aluminium Oxide Ceramic Insulators

About UniPreTec

UniPreTec provides high-performance ceramic products in Alumina, Zirconia, Boron Nitride, Machinable Glass Ceramic, Silicon Nitride and further special materials. Along with these materials, we offer several machining from which to choose such as cutting, drilling, sawing, turning, grinding, polishing etc.. Furthermore, our technologies and equipments allow us to provide various and flexible forming processes, like dry pressing, isostatic pressing, extrusion, injection moulding and slip casting.