Alumina Ceramics | Vhandy Ceramics

Alumina Ceramic

Using patented technology, combined with advanced and strict production process, our products can reach 99.7% purity.



Applications

Wire and thread guides
Mechanical seals
Seal faces
Valve seats
Machine components
High temperature electrical insulators
High voltage insulators
Electronic components & substrates
Ballistic Armor
Roller & Ball Bearings
Wear resistant linings
Semiconductor parts
Laser cavities
Tap plates
Shot blast nozzles
Knife sharpeners
Precision shafts and axles in high wear environments

Advantages

High hardness
Wear/abrasion resistant
High compressive/mechanical strength
Strong acid and alkali attack resistance at high temperatures
Excellent electrical insulation
Decent thermal conductivity

Similar products

Our line also produces products with the following purities:
95% Aluminum Ceramics
96% Aluminum Ceramics
99% Aluminum Ceramics
99.7% Aluminum Ceramics

Applications

Ceramic Seals

Ceramic Sleeve

Ceramic Nozzles

HV Insulators

Material Properties

ltem	Unit	99.7% AI2O3	99% AI2O3	96% AI2O3	95% AI2O3
Purity	%	99.7	99	96	95
Density	g/cm³	3.9	3.89	3.7	3.6
Porosity	%	0	0	0	0
Firing Temp	℃	1800	1700	1700	1 680
Hardness	HV	1700	1600	1540	1500
Flexural Strength	Kgf/cm²	3500	3500	3200	3000
Compressive Strength	Kgf/cm²	30000	30000	26000	25000
Fracture Toughness	MPa/m	4	3.8	3.6	3~4
Max Operating Temp	℃	1700	1600	1480	1450
Coefficient	cm/cm/°C	8	8	8	8
Thermal Expansion	(RT to 700ᵒC)	8	8	8	8
Thermal Conductivity	W/m°K	27	25	24	22
Volume Resistivity	20°C	10¹²	10¹²	10¹²	10¹²
	100°C	10¹³	10¹³	10¹³	10¹³
	300°C	10¹²~10¹³	10¹²~ 10¹³	10¹²~10¹³	10¹²~10¹³
(ohm – cm)	1010	10¹²	10¹²	10¹¹	10¹⁰
Dielectric Strength	Volts/mil	220	216	212	210

FAQ

Can you provide samples for me to test? How much does it cost?

We strive to provide ceramic samples that closely meet your requirements to the best of our abilities.
The samples are completely free, but you need to pay the freight.
For samples with unique shapes that require custom molds, we are open to discussing the mold cost in order to accommodate your specific needs.

We don’t know which material of ceramic we need, what should we do?

No worries! Please provide us with more details about your requirements, such as the intended use, desired properties, and any specific characteristics you're looking for.

With these information, our team can guide you in selecting the most suitable ceramic material for your needs.

We are concerned about the quality of the product we ordered.

We understand your worries and we maintain stringent quality control standards as following:

Test Standard	Testing Dimension	Pass Rate	Standard Range
Appearance Inspection	Quantity and Severity of Defects	≥ 97.3%	Determined by AQL standard
Dimensional Inspection	Size Accuracy and Consistency	≥ 98.1%	Determined by ISO 9001 standard
Density Testing	Material Density	≥ 97%	Determined by ASTM C20 standard
Hardness Testing	Surface Hardness	≥ 98.2%	Determined by ISO 6508 standard
Flexural Strength Testing	Material Flexural Strength	≥ 97.9%	Determined by ASTM C1161 standard
Thermal Shock Stability Testing	Material Thermal Shock Stability	≥ 98.7%	Determined by ASTM C884 standard

*Qualification standards higher than ISO standards

In addition to production line inspections, we also accept inspections from third-party organizations several times a month

While the occurrence of defects is extremely rare, it is an unavoidable possibility. If any quality issues arise, we take full responsibility and will expedite the reproduction process at cost price.

Our commitment is to ensure that our products meet the highest quality standards and promptly address any concerns to ensure customer satisfaction.

What is the processing accuracy of ceramics?

Precision Requirement	Example	Unit
Surface Flatness	Ra ≤ 0.1 μm	μm
Dimensional Accuracy	Tolerance within tens of μm	μm
Aperture Precision	Diameter tolerance within a few hundred μm	μm
Surface Finish	Ra ≤ 0.2 μm	μm

We maintain strict processing precision standards, ensuring that our products meet the majority of requirements using our standard manufacturing processes.

However, if you have a need for even higher precision products, please feel free to contact us.

We can discuss your specific requirements and explore customized solutions to meet your exacting standards.

What's your trade terms?

We prefer EXW, FOB and CIF as for terms.
T/T, West Union,30% deposit, 70% balance paid before delivery are greatly appreciated.

How long does your production take?

Q: What is the typical production lead time for Vhandy Ceramics?
A: The typical production lead time for Vhandy Ceramics is 15 to 20 days.

Q: Are there any situations where the actual delivery time may be longer?
A: Yes, in certain cases, such as shipping to distant countries, the actual delivery time may be extended beyond the standard range.

Q: What factors can contribute to longer delivery times?
A: Factors such as customs clearance procedures, transportation logistics, and international shipping arrangements can contribute to longer delivery times.

Q: How does Vhandy Ceramics handle potential delays?
A: Vhandy Ceramics strives to minimize potential delays and works closely with shipping partners to expedite the process whenever possible.

Q: Can I get an accurate delivery estimate for my order?
A: Yes, our customer service team can provide you with an estimated delivery time based on your specific order and location. They will also keep you informed throughout the production and shipping process.