is pleased to announce that it has developed a new fine ceramic with a color
that closely resembles 18-karat gold. The material has been created by raising
the brightness level approximately 5% (approx. 3.6 points) above previous gold
ceramic products. It is a beautiful reflection of the materials development
and manufacturing technologies that Kyocera has accumulated in its five decades
of R+D in fine ceramics.
The new gold fine ceramic is a sophisticated addition to Kyocera’s lineup
of colored ceramics that are used as decorative materials for watches, mobile
phones and other premium accessories. The company will pursue upscale applications
for the elegant gold material in new markets worldwide.
The three inherent attributes of color are luminosity, hue and saturation.
Luminosity refers to the visually perceived brightness or darkness of a color
as a percentage. In developing the new gold fine ceramic material, Kyocera increased
the luminosity of its previous gold fine ceramic – one of 18 colored fine
ceramics provided by Kyocera – while retaining the material’s outstanding
hardness. This made it possible to more closely recreate the texture and color
of 18-karat gold.
Kyocera’s extensive line of colored fine ceramics has expanded with
the addition of a new material for premium applications that bears a striking
resemblance to 18-karat gold.
Features of the new material
1) Replicating the elegant color of 18-karat gold
In developing the new gold fine ceramic, Kyocera added a substance to the titanium
nitride – the main component of the gold fine ceramic – to increase
its luminosity. To minimize the reduction in hardness resulting from this additive,
Kyocera found the optimum rate of addition by balancing the brightness with
the variations in the property. This allowed the luminosity of the new material
to be about 5% (3.6 points) higher than that of the previous gold ceramic while
achieving an elegant, sophisticated texture corresponding to that of gold and
other precious metals.
2) Texture and a variety of features unique to fine ceramics
After being processed into components, the price of the new gold ceramic is
about one-twentieth to one-twenty-fifth that of generally available 18-karat
gold. In addition, its hardness is five to ten times higher than that of gold,
resulting in superior scratch resistance. It is also lightweight, with a specific
gravity less than one-third that of 18-karat gold. Apart from being an alternative
to gold, the new gold fine ceramic can be used in a wider range of applications,
while retaining its beautiful appearance and texture for a longer period, thanks
to its outstanding durability. The quality of this new material makes it appropriate
for decorative parts as well as jewelry.
Comparison between 18-karat gold and the new gold ceramic
New gold ceramic
Specific gravity (weight)
Hardness (Vickers hardness)
1 - 2
1) Kyocera’s fine ceramics
Fine ceramics have been applied for a wide range of products as a new industrial
material and, in recent years, have become highly valued for their beautiful
appearance, texture and color. The materials have gained renown by offering
better appearance and texture, finding a broad range of applications in jewelry,
watches and other accessories.
2) New market for gold fine ceramics
Because gold is the essential color for conveying opulence, demand has grown
for a gold fine ceramic that more closely resembles the color of 18-karat gold.
The market price of the new gold ceramic will be one-twentieth to one-twenty
fifth that of 18-karat gold, which makes the material an excellent candidate
for use in luxury applications, particularly as a material for decorative parts.
The company will target a greater variety of products to expand the applications
for fine ceramics, which to date have been used for the keypad buttons of premium
mobile phones, exterior parts in digital cameras, wristwatch bands and bodies,
3) Kyocera’s technology makes gold fine ceramics closely resemble 18-karat
In developing manufacturing methods for the new material, Kyocera conducted
about two years of basic research into its physical properties and other attributes.
The objective was to minimize the reduction in rigidity caused by the additive
used to increase luminosity. The new gold fine ceramic is a high-tech material
that combines superior physical properties made possible through painstaking
research efforts, and a beautiful appearance created by precision processing
and color control technology.