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Alumina Ceramic Rods | Professional China Supplier

Brand: Yunxing
Product origin: China
Delivery time: Depending on product size and quantity
Supply capacity: 5,000-10,000/month(Looking for distributors)

1. Alumina ceramic rods have excellent strength and hardness. 2. High temperature resistance and chemical resistance. 3. Excellent electrical insulation and thermal conductivity performance. 4. Accept customized sizes. 5. Large stock and fast delivery.

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Alumina Ceramic Rods | Professional China Supplier

What Is Alumina Ceramics?

Alumina ceramic, also known as alumina or aluminum oxide (Al2O3), is an industrial oxide ceramic known for its extreme hardness and high thermal conductivity. The properties of alumina ceramics make them one of the most widely used ceramics for structural, wear, and corrosive environments. Alumina ceramics are typically manufactured from bauxite and can be shaped using injection molding, die pressing, isostatic pressing, slip casting, diamond machining, and extrusion. Like aluminum nitride and other important engineering materials, alumina can be produced by dry press and sinter or by hot pressing using appropriate sintering aids. Alumina-based ceramics are one of the most studied and characterized advanced ceramic materials known today. Due to the important combination of properties, their behavior has been thoroughly researched. Alumina is characterized by high hardness, excellent resistance to corrosion, thermal stability, good dielectric properties (for converting from DC to GHz frequencies), low loss tangent, and stiffness. See the next section for more details on the properties of alumina ceramic materials.

Advantages of Alumina Ceramic Rods

Alumina ceramic rods have excellent strength and hardness (9 Mohs), making them resistant to wear, abrasion, and mechanical stress. Alumina ceramic rods melting point exceeds 1700 ° C and can withstand extreme temperatures. The DC insulation resistance is 10¹⁴Ohm/cm at 20 ° C, and the good thermal conductivity is 25W/m.k. Accept customization.

Applications of Alumina Ceramic Rods

1. Alumina ceramic rods are commonly used as support structures, gaskets, and rods in heating systems.

2. Alumina ceramic rods are an ideal choice for electrical components such as insulators and thermocouples in high-voltage equipment.

3. Alumina ceramic rods are used for mechanical equipment that requires wear-resistant parts.

4. Alumina ceramic rods are commonly used in precision instruments and measuring equipment.

Quality testing standards

1. Visual inspection of the rod for any signs of damage or irregularities.

2. Measurement of the length and thickness of the rod to check for accuracy.

3. Checking for any leaks or pinhole defects in the rod.

4. Verification of the material and chemical composition of the rod.

Size,Performance index

Alumina round rods Specification Table

Number	Diameter		LENGTH MM	Number	Diameter		LENGTH MM
Number	INCH	MM	LENGTH MM	Number	INCH	MM	LENGTH MM
1	0.031	0.79	≤1250	25	0.630	16	≤1500
2	0.039	1		26	0.669	17
3	0.059	1.5		27	0.688	17.5
4	0.062	1.58		28	0.748	19
5	0.079	2	≤1500	29	0.750	19.05
6	0.100	2.5	≤1500	30	0.787	20
7	0.118	3	≤1750	31	0.827	21
8	0.125	3.18		32	0.866	22
9	0.157	4		33	0.906	23
10	0.187	4.75		34	0.945	24
11	0.197	5		35	0.984	25
12	0.236	6		36	1.000	25.4
13	0.250	6.35		37	1.063	27	≤1250
14	0.276	7		38	1.126	28.6	≤1250
15	0.312	7.92		39	1.181	30	≤800
16	0.315	8		40	1.250	31.75
17	0.333	8.47		41	1.378	35
18	0.375	9.53		42	1.500	38.1
19	0.394	10		43	1.575	40
20	0.433	11		44	1.654	42
21	0.472	12		45	1.750	44.45	≤500
22	0.500	12.7		46	1.875	47.6	≤500
23	0.551	14	≤1500	47	1.969	50	≤300
24	0.591	15	≤1500	48	2.000	50.8	≤300

Alumina ceramic performance index (Notice of Correct in Leakeage Rate）

NO.	Property	Unit	Alumina
1	Al2O3	%	>99.3
2	SiO2	%	—
3	Density	g/cm3	3.88
4	Water absorption	%	0.01
5	Compressive strength	MPa	2300
6	20℃ leakage rates	Torr・L/sec	>10-11=1.33322×10-12Pa・m3/sec
7	Twisting in high temperature	mm	0.2 allowed in 1600℃
8	Bonding in high temperature		not bonded in 1600℃
9	20—1000℃ coefficient of thermal expansion	mm.10-6／℃.m	8.2
10	Thermal conductivity	W/m.k	25
11	Electric insulation strength	KV/mm	20
12	20℃direct current insulation resistance	Ohm/cm	1014
13	High-temperature insulation resistance	1000℃ MΩ	≥0.08
13	High-temperature insulation resistance	1300℃ MΩ	≥0.02
14	Thermal shock resistance		4 times not cracked in 1550℃
15	Maximum working temperature	℃	1800
16	Hardness	Mohs	9
17	Flexural strength	Mpa	350

Our factory

Alumina Ceramic Rods

Slip casting moulding: Inject the prepared slurry into the gypsum mold and let it stand for a period of time to allow the gypsum mold to absorb moisture. The slurry forms a uniform body on the inner wall of the mold.
Isostatic pressing: During the isostatic pressing procedure, binders are blended with the ceramic powder. As a result of this process, the powder transforms into freely flowing granules that can effortlessly fill the molds.
Extrusion moulding: Suitable for long tube products, the powder is extruded into shape through an extruder.

We only make high purity alumina ceramics

1. High-purity alumina content 99.3% -99.5%, other alumina ceramics 92% -99%.

2. The color of high purity alumina product is milky white, and other products are pink or white. The higher the purity, the more transparent the color.

3. Alumina is a refractory material, the higher the purity, the better the refractory effect.

4. After high-purity alumina ceramics are fired and cooled in a 1800-degree high-temperature kiln, the products are not easy to break when they encounter high temperatures. Other ceramics are fired at 1500 ℃ ~ 1800 ℃.

5. The volume density of high-purity alumina> 3.92 g / cm3 has a smooth surface and is not easily corroded by chemicals. The bulk density of other ceramics is> 3.70 g / cm3 ~> 3.85 g / cm3.

6. High purity alumina has good hardness and good wear resistance.

7. High purity alumina products have a longer service life.